Dark Snow Project: Crowd-Source Funded Science for Greenland

By: Dr. Jeff Masters , 3:03 PM GMT on April 26, 2013

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"There's no place on Earth that is changing faster--and no place where that change matters more--than Greenland." So said 350.org founder Bill McKibben, in a 2012 Rolling Stone magazine interview. As Earth Week 2013 draws to a close, I want to draw your attention to a unique effort to learn more about why Greenland is melting so fast--a crowd-funded research project that anyone can contribute to, which aims to answer the "burning question": How much does wildfire and industrial soot darken the ice, increasing melt? The Dark Snow Project, the first-ever Greenland expedition relying on crowd-source funding, hopes to raise $150,000 to mount a field research campaign to find out. The project is the brainchild of Dr. Jason Box, Professor at the Geological Survey of Denmark and Greenland (GEUS), and one of the world's leading experts on Greenland's glaciers. He has set up a website called darksnowproject.org to help raise the funds for the field campaign, and has raised about half of the needed amount as of mid-April.


Figure 1. Over the course of several years, turbulent water overflow from a large melt lake carved this 60-foot-deep (18.3 meter-deep) canyon in Greenland's Ice Sheet (note people near left edge for scale). Image credit: Ian Joughin, University of Washington.

2012: Unprecedented melting in Greenland
Watching the weather events of 2012 over Greenland made all seasoned climate watchers a little queasy. The vast ice sheet on the island holds enough water to raise global sea levels by 7.36 meters (24.15 feet) were it all to melt, and the ice melt season of 2012 gave notice that an epic melting of the Greenland Ice Sheet may be underway. According to NOAA's 2012 Arctic Report Card, the duration of melting at the surface of the ice sheet in summer 2012 was the longest since satellite observations began in 1979, and the total amount of summer melting was nearly double the previous record, set in 2010 (satellite records of melting go back to 1979.) A rare, near-ice sheet-wide surface melt event melted 97% of the surface of Greenland's ice sheet on July 11 - 12. While a similar melt event at the summit occurred 1889, but the 1889 event has no basis in the instrumental record from coastal Greenland. It's instead likely that 2012 was Greenland's warmest summer in at least 863 years, since the medieval warm period (see http://www.meltfactor.org/blog/?p=677 and http://www.meltfactor.org/blog/?p=725). The incredibly warm temperatures have been blamed on highly unusual atmospheric circulation and jet stream changes, which were also responsible for 2012's unusually wet summer weather in England. It would not be a surprise if this sort of summer began occurring more often, since temperatures on top of the Greenland Ice Sheet have been rising six times faster than the global average during the past twenty years. A May 2013 Geophysical Research Letters paper by McGrath et al., "Recent warming at Summit, Greenland: Global context and implications", concluded that by 2025, there is a 50% chance of ice sheet-wide melt events happening annually. The ice sheet reached its darkest value on record in 2012. The darkened surface was due to below average summer snow, soot particles from pollution and forest fires, and record melting. A darker ice sheet absorbs more solar energy, in a vicious cycle that raises temperatures, melts more ice, and further darkens the ice sheet. The amount of melting that was caused by soot from forest fires is important to know, since global warming is likely to increase the amount of forest fires in coming decades. However, the amount of forest fire soot landing on the Greenland Ice Sheet is almost completely unknown, which is why Dr. Box is determined to find out, via the Dark Snow Project.


Figure 2. Smoke from a fire in Labrador, Canada wafts over the Greenland ice sheet on June 17, 2012, as seen in this cross-section view of aerosol particles taken by NASA's CALIPSO satellite. Image credit: Dr. Jason Box, Ohio State University.

Greenland causing 25% of global sea level rise
In a landmark study published in November 2012 in Science, 47 researchers from 26 laboratories reported that the amount of ice being lost from Greenland and Antarctica has tripled since the 1990s, with Greenland contributing more than twice as much to global sea level rise than Antarctica. The study, "A Reconciled Estimate of Ice-Sheet Mass Balance", found that the two ice sheets were responsible for 20% of the global sea level rise of 3.1 mm/year during the 20-year period 1992 - 2011. The remainder of the rise was due to expansion of the water due to heating of the oceans, melting of mountain glaciers, and unsustainable pumping of ground water. Said co-author Erik Ivins of NASA's Jet Propulsion Laboratory, "The pace of ice loss from Greenland is extraordinary, with nearly a five-fold increase since the mid-1990s." As of 2011, Greenland's contribution to global sea level rise on its own had risen to 20 - 25%, according to an international research group led by the GFZ German Research Centre for Geosciences, in an article published in Earth and Planetary Science Letters on 1 June 2012. If the current exponential ice loss trends continue for the next ten years, Greenland's contribution to sea level rise will double to 1.4 mm/yr by 2022, the researchers said. Many sea level rise researchers expect global sea level to rise by about 1 meter (3.3 feet) by 2100. During the 20th century, global sea level rise was about 0.18 meters (7 inches.)


Figure 3. Monthly smoothed (purple) and unsmoothed (blue) values of the total mass lost from the Greenland Ice Sheet (in Gigatons, Gt) from measurements by the GRACE satellites between March 2002-September 2012. An approximate equivalent global sea level rise figure is on the right axis. Note that the decline in ice mass lost from Greenland is not a straight line--it is exponential, meaning that more ice loss is lost each year than in the previous year. Image credit: 2012 Arctic Report Card.

Will Antarctica be more important than Greenland for sea level rise?
Although melting from Greenland is currently raising global sea level by about a factor of two more than Antarctica melting is, that situation may change later this century. A 2013 study by Dahl-Jensen et al. looked at a new ice core drilled from the bottom-most depths of the Greenland Ice Sheet. The core suggests that the ice in Greenland may have partially survived the warm Eemian period before the Ice Age, approximately 118,000 - 126,000 years ago, when Greenland temperatures were 5- 8°C warmer than present-day temperatures. Global sea level during the Eemian was 4 - 8 meters (13 - 26 ft) higher than the present sea level, and the scientists estimated that melting from Greenland was responsible for 2 meters (6.6 ft) of this sea level rise. This implies that Antarctica was responsible for 50 - 75% of global sea level rise during the Eemian, and thus we might expect Antarctica to take over as the dominant source of sea level rise later this century, when global temperatures may to rise to levels similar to those experienced during the Eemian.

Related posts
Greenland experiences melting over 97% of its area in mid-July (July 25, 2012)
Record warmth at the top of the Greenland Ice Sheet (July 18, 2012)
Unprecedented May heat in Greenland; update on 2011 Greenland ice melt (May, 2012)
Greenland update for 2010: record melting and a massive calving event

Dr. Jason Box's blog on Greenland and the Dark Snow Project is at http://www.meltfactor.org.

The http://www.greenlandmelting.com/ website looks like a great resource for following this year's melt progression in Greenland.


Video 1. Glaciologist Dr. Jason Box and 350.org founder Bill McKibben plug the Darksnow project in this January 2013 video by Peter Sinclair. There's some impressive footage of the record Greenland snow melt of summer 2012 sweeping away a 20-ton tractor that was attempting to repair a bridge washed out by the raging Watson River on July 11, 2012 in Kangerlussauaq, Greenland. The driver escaped unharmed.

Support the Dark Snow Project
One of Dr. Box's collaborators, photographer James Balog, who created the amazing time-lapse Greenland glacier footage in the fantastic 2012 "Chasing Ice" movie, puts it like this: "Working in Greenland these past years has left me with a profound feeling of being in the middle of a decisive historic moment--the kind of moment, at least in geologic terms, that marks the grand tidal changes of history." On that note, I encourage you all to support the Dark Snow Project. Have a great weekend, everyone!

Dark Snow Project Expedition Plan 2013
Prepare and gather science equipment including a field spectrometer, snow and ice coring device, and snow metrics kit.

Travel to Iqualuit, on Baffin Island, Nunavut from home locales in California, Ohio, Michigan, Vermont and rendezvous with Dash-6 "Twin Otter" ski-equipped airplane and flight crew.

Organize cold weather survival kit.

Ferry team from Iqualuit to Kangerlussuaq, Greenland.

Fly to and land at sampling sites high on the inland ice sheet.

At each site collect snow samples from a snow pit and obtain snow cores to a minimum depth of the previous year's snow surface, and record snow properties.

Transport of team and snow samples to Greenland's capital Nuuk, where the team will rest after hustling at field sites.

Return to Iqualuit, then to respective home locales to start the data analysis and reporting phase of campaign.

Jeff Masters

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Storm reports so far:

Member Since: July 21, 2011 Posts: 83 Comments: 7167
Current SPC watches

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What happened two years ago today is something that can't be forgotten by meteorologists and rest of weather community. Prayers to those who are still suffering from this storm today.
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Quoting wilsongti45:
Link

Very interested to see how this will play out this summer. I have been a broken record about the Arctic sea ice disappearing this summer. Finally, some validation from an expert.

For reference...



wilsongti45'

I previously posted this at BaltimoreBrian's blog.
Here are two more professionals who agree with you.


Dr Maslowski and Dr Peter Wadhams predict mid decade.
Maslowski and Team Offer New Estimate on Summer Arctic Sea Ice Disappearance

Wiesław Maslowski and his team from the Naval Postgraduate School in Monterey, California, USA presented a new and improved computer model predicting Arctic sea ice behaviour over the coming years at the 2011 European Geosciences Union (EGU) in Vienna, Austria. The model predicts that increasing summer sea ice melt could lead to an ice-free Arctic during at least part of the boreal (northern hemisphere) summer by 2016, with a margin of error of plus or minus three years.


Arctic expert predicts final collapse of sea ice within four years

As sea ice shrinks to record lows, Prof Peter Wadhams warns a 'global disaster' is now unfolding in northern latitudes. ...

..."This collapse, I predicted would occur in 2015-16 at which time the summer Arctic (August to September) would become ice-free. The final collapse towards that state is now happening and will probably be complete by those dates".



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The current severe thunderstorm watch 142 for Texas ....(keep reading below)


could be expanded southward to include the following locations along the border


currently mapping the SPC alerts
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Member Since: July 21, 2011 Posts: 83 Comments: 7167
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Quoting Cantu5977:


When are you going to make the CFSv2 available on your site? Great job on you website!


Thanks. CFS will hopefully come soon. It will take more time to code than most models because the CFS is only really useful when taking the mean of multiple long-range forecasts. Creating the framework for multi-run averages takes time.
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Member Since: July 21, 2011 Posts: 83 Comments: 7167
Quoting Levi32:
Just for fun, the CFSv2 is one of today's only models that shows a subtropical cyclone east of Florida in about a week.



When are you going to make the CFSv2 available on your site? Great job on you website!
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ouch



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possible rotation developing with this cell



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wow HRRR nailed storm evolution (see post 628 and current radar trends.)
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Link

Very interested to see how this will play out this summer. I have been a broken record about the Arctic sea ice disappearing this summer. Finally, some validation from an expert.

For reference...

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Just for fun, the CFSv2 is one of today's only models that shows a subtropical cyclone east of Florida in about a week.

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This watch is from the afternoon of April 27, 2011. I don't know if we'll see one like this for decades. It certainly hadn't happened before this date IIRC, though the one on April 26 did come close.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

WT 0235 PDS
PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES : >95%
PROB OF 1 OR MORE STRONG /F2-F5/ TORNADOES : >95%
PROB OF 10 OR MORE SEVERE WIND EVENTS : >95%
PROB OF 1 OR MORE WIND EVENTS >= 65 KNOTS : >95%
PROB OF 10 OR MORE SEVERE HAIL EVENTS : >95%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : >95%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : >95%

&&
ATTRIBUTE TABLE:
MAX HAIL /INCHES/ : 4.0
MAX WIND GUSTS SURFACE /KNOTS/ : 70
MAX TOPS /X 100 FEET/ : 500
MEAN STORM MOTION VECTOR /DEGREES AND KNOTS/ : 25040
PARTICULARLY DANGEROUS SITUATION : YES

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Strong thunderstorms moving into Alabama:

Member Since: July 21, 2011 Posts: 83 Comments: 7167
Another severe thunderstorm watch issued for northern part of Alabama and parts of northwestern Georgia.



SEL3

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 143
NWS STORM PREDICTION CENTER NORMAN OK
525 PM CDT SAT APR 27 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN AND CENTRAL ALABAMA
NORTHWEST GEORGIA

* EFFECTIVE THIS SATURDAY AFTERNOON FROM 525 PM UNTIL MIDNIGHT
CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL DAMAGING WIND GUSTS TO 60 MPH POSSIBLE
SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF
HUNTSVILLE ALABAMA TO 30 MILES SOUTH SOUTHWEST OF BIRMINGHAM
ALABAMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 141...WW 142...

DISCUSSION...LARGE-SCALE FORCING FOR UPWARD VERTICAL MOTION
DEVELOPING EASTWARD ACROSS THE REGION...ALONG AND JUST SOUTH OF A
SURFACE FRONTAL ZONE ...IS EXPECTED TO CONTRIBUTE TO INCREASING
THUNDERSTORM ACTIVITY DURING THE NEXT FEW HOURS. IN CONJUNCTION
WITH STRONG DEEP LAYER SHEAR...DISCRETE STORMS...INCLUDING ISOLATED
SUPERCELLS...MAY EVOLVE INTO AN EASTWARD PROGRESSING ORGANIZED
CLUSTER OF STORMS BY THIS EVENING. GIVEN SOMEWHAT MARGINAL BOUNDARY
LAYER MOISTURE AND INSTABILITY...THE RISK FOR TORNADOES...WHILE
PERHAPS NOT COMPLETELY NEGLIGIBLE DUE TO SIZABLE LOW-LEVEL
SHEAR...APPEARS RELATIVELY LOW...WITH LARGE HAIL AND DAMAGING WIND
GUSTS PRIMARY SEVERE RISKS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 25035.


...KERR
Member Since: July 21, 2011 Posts: 83 Comments: 7167
Member Since: July 21, 2011 Posts: 83 Comments: 7167
Quoting LargoFl:
nsw says one report of Hail around Houston..


Largest hail I've seen today is quarter-sized.
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Member Since: July 21, 2011 Posts: 83 Comments: 7167
Member Since: July 15, 2006 Posts: 178 Comments: 56059
Today is so beautiful.Tomorrow we have a chance of rain but I'm not complaining.The pollen on the cars are horrid.If we don't get any rain it's only going to get worse..
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707. VR46L
Quoting txjac:


Thanks, I am inside with my little animal kingdom ...we are all safe and happy

The purple area is south and east of me, thanks goodness



Thats Good!!

Flash flood warning now !!


735
WGUS54 KHGX 272206
FFWHGX
TXC157-201-280000-
/O.NEW.KHGX.FF.W.0003.130427T2206Z-130428T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000 Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
506 PM CDT SAT APR 27 2013

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
NORTHEASTERN FORT BEND COUNTY IN SOUTHEAST TEXAS...
SOUTHERN HARRIS COUNTY IN SOUTHEAST TEXAS...

* UNTIL 700 PM CDT

* AT 502 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. TWO TO FOUR INCHES OF RAIN HAVE
ALREADY FALLEN ACROSS SOUTHERN HARRIS COUNTY AND ANOTHER ONE TO
THREE INCHES OF RAIN WILL BE POSSIBLE. FLASH FLOODING IS EXPECTED
TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MISSION BEND...SUGAR LAND...BELLAIRE...PECAN GROVE...WEST
UNIVERSITY PLACE...STAFFORD...TOWN WEST...MEADOWS AND SOUTHSIDE
PLACE.

LAT...LON 2957 9576 2974 9577 2975 9530 2960 9524

$$




Member Since: March 1, 2012 Posts: 0 Comments: 6997
Member Since: July 21, 2011 Posts: 83 Comments: 7167
Severe thunderstorm watch issued for parts of South Texas.



EL2

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 142
NWS STORM PREDICTION CENTER NORMAN OK
505 PM CDT SAT APR 27 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTH TEXAS
COASTAL WATERS

* EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 505
PM UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
SEVERAL VERY LARGE HAIL EVENTS TO 3 INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75
MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM DEL RIO TEXAS TO 30
MILES EAST SOUTHEAST OF HUNTSVILLE TEXAS. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 141...

DISCUSSION...TSTMS FCST TO CONTINUE INCREASING IN COVERAGE THROUGH
AT LEAST EARLY EVENING ACROSS THIS AREA IN FRONTAL AND SEA-BREEZE
REGIMES...WITH OUTFLOW-BOUNDARY INTERSECTIONS ALSO OFFERING
LOCALIZED FOCI FOR TSTM INITIATION AND MAINTENANCE. WITH WWD EXTENT
ACROSS WW AREA...EXPECT GREATER DEEP SHEAR...BUOYANCY...AND EXPECTED
ORGANIZATION OF SVR POTENTIAL...INCLUDING RISK OF
SIGNIFICANT/DAMAGING HAIL WITH ANY RELATIVELY DISCRETE SUPERCELLS.
HOWEVER...OVERALL COVERAGE MAY CONTINUE TO BE GREATER WITH EWD
EXTENT INTO SOMEWHAT WEAKER PARAMETER SPACE. DAMAGING GUSTS AND
LARGE HAIL THEREFORE ARE POSSIBLE ACROSS ENTIRE WW AREA.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 30025.


...EDWARDS
Member Since: July 21, 2011 Posts: 83 Comments: 7167
MesoWest Jurupa Valley CA US SGXWFO, Riverside, California (PWS)
Updated: 1:49 PM PDT on April 27, 2013
Clear
86 °F
Clear
Humidity: 32%
Dew Point: 53 °F
Wind: 2 mph from the West
Wind Gust: 12.0 mph
Pressure: 29.96 in (Falling)
Heat Index: 84 °F
Visibility: 10.0 miles
UV: 9 out of 16
Pollen: 6.20 out of 12
Pollen Forecast new!
Clouds:
Clear -
(Above Ground Level)
Elevation: 794 ft

84.1 here
Member Since: February 29, 2012 Posts: 0 Comments: 6236
Hook near Houston. Not sure if it's just a harmless structure of the thunderstorm complex, or actually tornadic.
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Quoting Stormchaser121:
img src="http://imageshack.us/a/img833/1236/screenshot 20130425at643.png" style
width: 501px; width: 500px; ">


I thought my hurricane potential impact picture would have been something common common here but I see people putting it up on fb and reposting it here...just saying

Anything special about it?
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701. LargoFl
10:01 PM GMT on April 27, 2013
Gee ive been in alot of storms with hail over the years but..ive never seen Baseball sized hail..geez that could kill ya.
Member Since: August 6, 2011 Posts: 4 Comments: 42085
700. LargoFl
9:58 PM GMT on April 27, 2013
SEVERE THUNDERSTORM WARNING
ALC033-059-272230-
/O.NEW.KHUN.SV.W.0056.130427T2145Z-130427T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
445 PM CDT SAT APR 27 2013

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN COLBERT COUNTY IN NORTHWEST ALABAMA...
NORTHWESTERN FRANKLIN COUNTY IN NORTHWEST ALABAMA...

* UNTIL 530 PM CDT.....WOW BASEBALL SIZED HAIL

* AT 445 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING LARGE DAMAGING HAIL OF GOLF BALL TO BASEBALL
SIZE AND DAMAGING WINDS OF 60 TO 70 MPH. THIS STORM WAS LOCATED 10
MILES NORTHEAST OF RED BAY...AND MOVING EAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
RUSSELLVILLE...TUSCUMBIA AND LITTLEVILLE.
Member Since: August 6, 2011 Posts: 4 Comments: 42085
699. LargoFl
9:54 PM GMT on April 27, 2013
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
431 PM CDT SAT APR 27 2013

TXZ223-225-272215-
GONZALES-LAVACA-
431 PM CDT SAT APR 27 2013

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAVACA AND
NORTHEASTERN GONZALES COUNTIES UNTIL 515 PM CDT...

AT 423 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 7 MILES EAST OF GONZALES...MOVING EAST AT 20 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
MOULTON...
WAELDER...
NICKLE...
NEWTONVILLE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER
CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED
ROADWAYS.

LAT...LON 2976 9731 2957 9707 2935 9734 2958 9763
TIME...MOT...LOC 2131Z 251DEG 17KT 2954 9729

$$
Member Since: August 6, 2011 Posts: 4 Comments: 42085
698. txjac
9:53 PM GMT on April 27, 2013
Quoting VR46L:
TXJAC ..please Stay Safe!!



Thanks, I am inside with my little animal kingdom ...we are all safe and happy

The purple area is south and east of me, thanks goodness
Member Since: April 24, 2010 Posts: 1 Comments: 2617
697. KEEPEROFTHEGATE (Mod)
9:52 PM GMT on April 27, 2013
Member Since: July 15, 2006 Posts: 178 Comments: 56059
696. LargoFl
9:52 PM GMT on April 27, 2013
Member Since: August 6, 2011 Posts: 4 Comments: 42085
695. VR46L
9:51 PM GMT on April 27, 2013
TXJAC ..please Stay Safe!!

Member Since: March 1, 2012 Posts: 0 Comments: 6997
694. LargoFl
9:48 PM GMT on April 27, 2013
Member Since: August 6, 2011 Posts: 4 Comments: 42085
693. LargoFl
9:45 PM GMT on April 27, 2013
nsw says one report of Hail around Houston..
Member Since: August 6, 2011 Posts: 4 Comments: 42085
692. LargoFl
9:43 PM GMT on April 27, 2013
SEVERE THUNDERSTORM WARNING
ARC085-119-272215-
/O.NEW.KLZK.SV.W.0112.130427T2139Z-130427T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LITTLE ROCK AR
439 PM CDT SAT APR 27 2013

THE NATIONAL WEATHER SERVICE IN LITTLE ROCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL LONOKE COUNTY IN CENTRAL ARKANSAS...
EAST CENTRAL PULASKI COUNTY IN CENTRAL ARKANSAS...

* UNTIL 515 PM CDT

* AT 436 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
SWEET HOME...OR 3 MILES SOUTHEAST OF LITTLE ROCK NATIONAL
AIRPORT...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
NORTH LITTLE ROCK... LONOKE... LITTLE ROCK ARPT...
LITTLE ROCK NATIONAL AIRPORT... DWNTWN LITTLE ROCK...
TOLTEC MOUNDS SP... SWEET HOME... SISEMORE...
SCOTT... PROTHRO JUNCTION... METO...
MCCREANOR... MCALMONT... LAKEWOOD...
KEO... ARGENTA... BEVIS CORNER...
TOLTEC...

THIS INCLUDES INTERSTATE 30 BETWEEN MILE MARKERS 137 AND 142.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 152 AND 182.

THIS INCLUDES INTERSTATE 440 BETWEEN MILE MARKERS 1 AND 12.

THIS INCLUDES INTERSTATE 530 BETWEEN MILE MARKERS 1 AND 5.
Member Since: August 6, 2011 Posts: 4 Comments: 42085
691. KEEPEROFTHEGATE (Mod)
9:43 PM GMT on April 27, 2013
Member Since: July 15, 2006 Posts: 178 Comments: 56059
690. Tornado6042008X
9:43 PM GMT on April 27, 2013
This is at 538 PM CDT as the Tuscaloosa-Birmingham tornado crossed the Tuscaloosa/Jefferson county line with a well defined debris ball.



 
Here are the relative storm velocities at the time.

 

 
A very costly storm for sure which will be remembered for a long long time.
 
 
 

 
Member Since: March 29, 2013 Posts: 0 Comments: 354
689. LargoFl
9:41 PM GMT on April 27, 2013
Quoting VR46L:


Its very Nasty ..There is Hail possibly with it .
yes a nasty storm there..hope everyone stays safe there..
Member Since: August 6, 2011 Posts: 4 Comments: 42085
688. barbamz
9:39 PM GMT on April 27, 2013
Quoting txjac:
I am getting pounded here ...and loving it.
Thank you Mother Nature.


I'm glad for you and Texas! (Edit: But of course: no hail if possible)

Good night from Germany.
Member Since: October 25, 2008 Posts: 62 Comments: 6704
687. Civicane49
9:39 PM GMT on April 27, 2013
Member Since: July 21, 2011 Posts: 83 Comments: 7167
686. VR46L
9:39 PM GMT on April 27, 2013
Quoting LargoFl:
nasty cell over houston.................


Its very Nasty ..There is Hail possibly with it .
Member Since: March 1, 2012 Posts: 0 Comments: 6997
685. LargoFl
9:38 PM GMT on April 27, 2013
DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SOUTHSIDE PLACE...OR
1 MILES SOUTH OF WEST UNIVERSITY PLACE...AND MOVING SOUTHEAST AT
25 MPH.

* LOCATIONS IMPACTED INCLUDE...
HOUSTON...PEARLAND...CLOVERLEAF...BELLAIRE...SOUTH HOUSTON...WEST
UNIVERSITY PLACE...GALENA PARK...JACINTO CITY...BROOKSIDE VILLAGE
AND SOUTHSIDE PLACE.
Member Since: August 6, 2011 Posts: 4 Comments: 42085
684. LargoFl
9:37 PM GMT on April 27, 2013
Quoting BaltimoreBrian:
LargoFl that sea level rise site you linked is great! I posted it in my blog too.
thanks glad you liked it
Member Since: August 6, 2011 Posts: 4 Comments: 42085
683. BaltimoreBrian
9:36 PM GMT on April 27, 2013
LargoFl that sea level rise site you linked is great! I posted it in my blog too.
Member Since: August 9, 2011 Posts: 26 Comments: 8884
682. LargoFl
9:35 PM GMT on April 27, 2013
nasty cell over houston.................
Member Since: August 6, 2011 Posts: 4 Comments: 42085

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Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

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