La Niña drawing to a close

By: Dr. Jeff Masters , 3:39 PM GMT on February 27, 2012

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La Niña, the cooling of the equatorial Pacific waters off the coast of South America that has dramatically affected our weather for most of the past two years, is almost done. Sea surface temperatures (SSTs) over the tropical Eastern Pacific in the area 5°N - 5°S, 120°W - 170°W, also called the "Niña 3.4 region", have warmed rapidly over the past two weeks, and were 0.4°C below average on February 27. This is slightly warmer than the -0.5°C threshold to be considered La Niña conditions, and is the first time since early August that La Niña conditions have not been present. It is likely that SSTs will continue to warm during March and April, and NOAA's Climate Prediction Center is predicting that they will declare an official end to La Niña sometime between March and April. A moderate to strong La Niña began in the summer of 2010, weakened briefly during May - July 2011 to neutral status, then re-intensified to a borderline weak/moderate La Niña from August 2011 - January 2012.


Figure 1. Comparison of the sea surface temperature departure from average from January 4 and February 22, 2012, over the tropical Eastern Pacific. During January, a large region of the ocean was more than 0.5°C cooler than average, meaning a La Niña event was present. Beginning in mid-February, waters warmed rapidly from east to west along the Equator, signaling and end to the La Niña event. Image credit: NOAA.

The forecast: neutral or El Niño conditions by fall
The period March - May is the typical time of year that El Niño or La Niña events end, and it is common for the opposite phenomena to take hold by fall. Since 1950, there have been twelve La Niña events that ended during the first half of the year; during six of those years (50%), an El Niño event formed in time for the August - September - October peak of hurricane season. The official forecast from Columbia University's IRI and NOAA's Climate Prediction Center calls for a 31 - 32% chance of an El Niño event during the 2012 Atlantic hurricane season. El Niño conditions tend to suppress Atlantic hurricane activity by creating high levels of wind shear that tends to tear hurricanes apart. Given the relatively high chance of an El Niño event this fall, plus ocean temperatures over the tropical Atlantic that are cooler than we saw in 2011 and 2010, I doubt we'll see an Atlantic hurricane season as active as the ones in 2010 and 2011 (nineteen named storms both years, third busiest seasons on record.) The demise of La Niña also means that global temperatures should begin to approach record warm levels by the end of the year. The cool waters of a La Niña event keep global temperatures cooler than average.


Figure 2. Computer model forecasts of El Niño/La Niña made in mid-February 2012. The forecasts that go above the red line at +0.5°C denote El Niño conditions; -0.5°C to +0.5°C denote neutral conditions, and below -0.5°C denote La Niña conditions. Most of the computer models are predicting neutral or El Niño conditions during the fall peak of the Atlantic hurricane season. Image credit: Columbia University's IRI.

I'll have a new post by Wednesday.

Jeff Masters

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HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
411 AM EST WED FEB 29 2012

FLZ039-042-043-048>052-055>057-060>062-065-292115 -
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSB OROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE-
411 AM EST WED FEB 29 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...DENSE FOG/SMOKE IMPACT...
A DENSE FOG ADVISORY IS IN EFFECT THIS MORNING ACROSS MOST OF THE
AREA. WIDESPREAD DENSE FOG WILL CONTINUE THROUGH EARLY WEDNESDAY
MORNING AFTER SUNRISE. VISIBILITY WILL BE FREQUENTLY REDUCED BELOW
A QUARTER OF A MILE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

...DENSE FOG/SMOKE IMPACT...
AREAS OF FOG WILL DEVELOP AFTER MIDNIGHT AND INTO EARLY THURSDAY
MORNING. SOME FOG WILL BE DENSE AND REDUCE VISIBILITY TO A QUARTER
OF A MILE IN SPOTS.

...WIND AND SEA IMPACT...
WINDS AND SEAS WILL INCREASE WITH A COLD FRONT ON SATURDAY AND
SUNDAY. ADVISORY CRITERIA CONDITIONS ARE POSSIBLE ACROSS AREA
WATERS THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

$$

JOHNSON
Member Since: August 6, 2011 Posts: 4 Comments: 42267
Quoting floridaT:
temp inversions at night can cause this


Or millions of bats. :)

Now that is a scary thought. :)
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Whatever that is in post 660, 664, and 672, you'll notice it is not moving east with the prevailing winds coming with the low, it is just sitting there like a big doughnut.

That is a very strange image is it not?

Will be interesting to see what happens when that low system moves over that area.
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BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
136 AM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* TORNADO WARNING FOR...
OZARK COUNTY IN SOUTHWEST MISSOURI...

* UNTIL 230 AM CST.

* AT 132 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A CONFIRMED TORNADO 17 MILES WEST OF LONG RUN...OR 5 MILES EAST OF
FORSYTH...MOVING EAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE BRIXEY...DORA...GAINESVILLE...
HARDENVILLE...ISABELLA...LONG RUN...NOBLE...ROCKBRIDGE...SUNDOWN...
SYCAMORE...TECUMSEH...THEODOSIA...THORNFIELD...WAS OLA...WILLHOIT
AND ZANONI.

IN ADDITION TO A TORNADO...THIS STORM IS CAPABLE OF PRODUCING
DESTRUCTIVE STRAIGHT LINE WINDS IN EXCESS OF 70 MPH.


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Severe Weather Warnings Page http://kamala.cod.edu/svr/
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Okay, floridaT, and I do hope you're right. But two nights in a row, and something I've obviously never seen before (and I look at a lot of radars, daily)?

Honestly, that's too close to Washington for me to be overly comfortable with, and they had a good-sized front move through last night that is rather gone by now. :-(

Jo
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Quoting flibinite:
I was just going to post the link to this, VAbeachhurricanes, having just gotten on the WU...

Link

... as the very same thing, though not quite as intense, was there Tuesday morning at about 3 AM... not quite 24 hours ago. I just looked at national radar for the first time since then, and once more I see it here, all throughout Virgina and surrounding areas.

Just a radar computer glitch?

It's actually sort of scary. :-(

Jo
temp inversions at night can cause this
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I was just going to post the link to this, VAbeachhurricanes, having just gotten on the WU...

Link

... as the very same thing, though not quite as intense, was there Tuesday morning at about 3 AM... not quite 24 hours ago. I just looked at national radar for the first time since then, and once more I see it here, all throughout Virgina and surrounding areas.

Just a radar computer glitch?

It's actually sort of scary. :-(

Jo
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669. HadesGodWyvern (Mod)
Seychelles Meteorological Services
Tropical Cyclone Advisory #8
DEPRESSION TROPICALE, FORMER IRINA (11-20112012)
10:00 AM RET February 29 2012
=====================================

At 6:00 AM UTC, Tropical Depression, Former Irina (993 hPa) located at 16.6S 43.9E has 10 minute sustained winds of 30 knots with gusts of 45 knots. The cyclone is reported as moving south southwest at 2 knots.

Near Gale Force Winds
=============
30 NM radius from the center extending up to 45 NM in the northwestern quadrant

Dvorak Intensity: T 2.5/2.5/S0.0/6 HRS

Forecast and Intensity
========================

12 HRS: 17.5S 43.6E - 35 knots (Tempête Tropicale Modérée)
24 HRS: 18.6S 43.2E - 40 knots (Tempête Tropicale Modérée)
48 HRS: 22.3S 40.7E - 60 knots (Forte Tempête Tropicale)
72 HRS: 23.9S 36.9E - 80 knots (Cyclone Tropical)

Additional Information
=======================

It is still difficult to locate accurately the low level circulation center, but it is probably very close from the coast (cf. Mean sea level pressure 993hpa at Besalampy at 0300 AM UTC). According to the last microwave imagery (F17 at 0301 AM UTC) cloud pattern remains poorly organized. Last animated METEOSAT pictures depict fluctuating deep convection close to the estimated center.

Most of available numerical weather prediction models are in good agreement. System is expected to track globally southwestward on the northwestern edge of the subtropical ridge. Vertical wind shear keeps on weakening aloft. Upper divergence is rather favorable and is expected to improve poleward through 72 hours.

Within this favorable environment, and as the low level circulation center is removing progressively from the Malagasy coast, system is forecast to intensify and should reach tropical cyclone stage on Friday. Available numerical weather prediction forecast tracks are in good agreement for a landfall on the Mozambique coastline. The potential threatened areas remains difficult at this range to be precisely targeted but runs after runs concentrates in a region between Beira and Maputo.

The next tropical cyclone advisory on TC Irina from Seychelles Meteorological Services will be issued at 12:30 PM UTC..
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668. HadesGodWyvern (Mod)
Mauritius Meteorological Services
Tropical Cyclone Advisory #2
DEPRESSION TROPICALE 12-20112012
10:00 AM RET February 29 2012
==============================

At 6:00 AM UTC, Tropical Depression 12 (997 hPa) located at 12.6S 68.4E has 10 minute sustained winds of 30 knots with gusts of 45 knots. The depression is reported as moving west southwest at 6 knots.

Near Gale Force Winds
==============
40 NM radius from the center extending up to 60 NM in the southern semi-circle

Dvorak Intensity: T2.5/2.5/D1.0/24 HRS

Forecast and Intensity
==============

12 HRS: 13.3S 67.5E - 35 knots (Tempête Tropicale Modérée)
24 HRS: 14.3S 66.1E - 35 knots (Tempête Tropicale Modérée)
48 HRS: 16.7S 64.0E - 45 knots (Tempête Tropicale Modérée)
72 HRS: 18.7S 64.5E - 45 knots (Tempête Tropicale Modérée)

Additional Information
================

The cloud pattern is now a cold clouds top central dense overcast. Latest burst of convection has started at 0300 AM UTC. Microwave imagery reveal a rather small core system and it is possible that the system may have already reached the moderate tropical storm level.

Low level inflow improves on the both sides. The upper level trough located yesterday closed to the southwest of the system is now moving away allowing an improvement of the upper level divergence as seen with the impressive outflow pattern (more limited in the eastern sector however).

The system should be to the north of the upper level ridge until Thursday night and experiencing some easterly shear. So intensification should be rather limited until that time. Friday, environmental conditions should become favorable under the upper level ridge but a new northerly vertical wind shear constraint should established on and after Saturday. Overall, the potential of intensification appears rather low ... However given the small size of the inner core, some stronger variations in intensity than presently indicated could be observed.

The track forecast is significantly adjusted to the west based on first 0000 AM UTC guidance output. The system should round the subtropical highs located to its east and should be Friday night ahead of a new upper to mid level trough. The track could take by that time a southeastwards motion. At the end of the forecast, a weakening system should track westwards within a low level steering flow.

Inhabitants of Rodriguez island should start to monitor the progress of this system.

The next tropical cyclone advisory from Mauritius Meteorological Services will be issued at 12:30 PM UTC..
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See storm reports at comment 656. This thing's marching across Missouri.

If you are in MO, FloridaT, I hope you're okay.

Quoting VAbeachhurricanes:


No, and I know there is no 75 DBZ anything near here. They just dual polarized it, they might have done it wrong. I don't know what would cause such a strong return though.


I got no idea.

I tarred. 'Nite you guys.
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Quoting Barefootontherocks:
WAVY tv radar - Hampton Roads, VA


but none of that is there... what is causing the return?!
Member Since: September 6, 2007 Posts: 0 Comments: 6706
Quoting Barefootontherocks:


Noticed it looked like rain kicking up there last eve, but that looks really weird. Can you see or hear anything?


No, and I know there is no 75 DBZ anything near here. They just dual polarized it, they might have done it wrong. I don't know what would cause such a strong return though.
Member Since: September 6, 2007 Posts: 0 Comments: 6706
WAVY tv radar - Hampton Roads, VA
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Quoting VAbeachhurricanes:
What the heck is this from?



Noticed it looked like rain kicking up there last eve, but that looks really weird. Can you see or hear anything?
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Quoting floridaT:
fire dept in lebanon reporting tornado on the ground
Crap!

And a wind report from Buffalo, between Bolivar and Lebanon.

0605 UNK 2 SW BUFFALO DALLAS MO 3762 9312 HOUSES DESTROYED AND MAJOR DAMAGE JUST SW OF BUFFALO. LIKELY A TORNADO (SGF)

New warning>>> confirmed tornado near Lebanon moving east at 65mph.
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fire dept in lebanon reporting tornado on the ground
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What the heck is this from?

Member Since: September 6, 2007 Posts: 0 Comments: 6706
Quoting floridaT:
and bearing down on lebanon not good
Dang. I don't like where that storm's headed. I hope it poops out.
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looks like its spinning up again
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Quoting Barefootontherocks:
Click image for reports


You can see where that bugger has been.
yes and the hail in boliva was right in the center
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Click image for reports


You can see where that bugger has been.
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Quoting Barefootontherocks:


Yes. Another tor warning. Same bugger, still going.
and bearing down on lebanon not good
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1.75" hail at Bolivar, MO
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Quoting floridaT:
there extending the warning out further now


Yes. Another tor warning. Same bugger, still going.
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structural damage reports coming in now from lamar eastward
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Quoting floridaT:
not good so fast moving and at night very dangerous
Yes. looks like it will be clear across Missouri and into Illinois by 2:30 am.
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there extending the warning out further now
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Quoting floridaT:
its spinning up again
Not surprising. That little bump's been a bugger for a while.


MESOSCALE DISCUSSION 0175
NWS STORM PREDICTION CENTER NORMAN OK
1140 PM CST TUE FEB 28 2012

AREAS AFFECTED...CNTRL/SWRN MO...NERN OK...FAR NWRN AR

CONCERNING...TORNADO WATCH 41...43...

VALID 290540Z - 290715Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 41...43...CONTINUES.

QLCS EXTENDING ALONG AND JUST AHEAD OF COLD FRONT STRETCHED FROM WRN
MO SWWD INTO NERN OK. PRIMARY DAMAGING WIND/TORNADO THREAT EXISTS
WITH COMPLEX BOWING SEGMENT/EMBEDDED SUPERCELL STRUCTURES ACROSS
DADE/CEDAR COUNTIES AS OF 0530Z. THIS FEATURE HAS BEEN PROPAGATING
AT AROUND 60 KT OVER THE PAST COUPLE OF HOURS WITH A HISTORY OF
POTENTIALLY SIGNIFICANT DAMAGING WIND AND/OR TORNADO DAMAGE ALONG
ITS PATH ACROSS SERN KS INTO SWRN MO. IT HAD BEEN COINCIDENT WITH
SURFACE THETA-E AXIS /RUNNING FROM JLN SWWD/...BUT APPEARS TO HAVE
SHIFTED E OF THAT INTO AN ENVIRONMENT CHARACTERIZED BY MIDDLE 50S
DEW POINTS. AS SUCH...SOME WEAKENING APPEARS POSSIBLE...BUT 0-1 KM
SRH AOA 600 M2/S2 WILL STILL BE QUITE FAVORABLE FOR A PERSISTENT
DAMAGING WIND/TORNADO RISK TO EXTEND QUICKLY EWD INTO S-CNTRL MO.

..GRAMS.. 02/29/2012
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not good so fast moving and at night very dangerous
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its spinning up again
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Quoting floridaT:
that was quite a spin north of joplin


I think it's still going - two or three tor warnings for it, including confirmed tor sighting. Went real near Lamar MO.

Add:
1118 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* TORNADO WARNING FOR...
CEDAR COUNTY IN SOUTHWEST MISSOURI...
NORTHEASTERN BARTON COUNTY IN SOUTHWEST MISSOURI...
NORTHWESTERN DADE COUNTY IN SOUTHWEST MISSOURI...
SOUTHEASTERN VERNON COUNTY IN WEST CENTRAL MISSOURI...

* UNTIL MIDNIGHT CST.

* AT 1114 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A CONFIRMED TORNADO NEAR MILFORD...OR 7 MILES NORTHEAST OF
LAMAR...MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE STOCKTON.

OTHER LOCATIONS IN THE WARNING INCLUDE STOCKTON LAKE.

IN ADDITION TO A TORNADO...THIS STORM IS CAPABLE OF PRODUCING LARGE
DAMAGING HAIL UP TO GOLF BALL SIZE...AND DESTRUCTIVE STRAIGHT LINE
WINDS IN EXCESS OF 70 MPH.
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that was quite a spin north of joplin
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DISCUSSION...BROKEN FRONTAL SQUALL LINE...WITH SOME EMBEDDED
SEMI-DISCRETE STORMS/SUPERCELLS...WILL CONTINUE TO SURGE EWD ACROSS
OK/KS INTO SW MO/NW AR OVERNIGHT. SOME LOW-LEVEL MOISTENING AND A
CONTINUATION OF VERY STRONG LOW-MIDLEVEL SHEAR PROFILES WILL
MAINTAIN A RISK FOR DAMAGING WINDS AND POSSIBLY A COUPLE OF
TORNADOES...AS WELL AS LARGE HAIL WITH THE MOST INTENSE/PERSISTENT
SUPERCELL STRUCTURES.
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Member Since: September 2, 2007 Posts: 179 Comments: 20448
Quoting hurricanehunter27:
Do you mean typically tornadoes in fields get lower ratings? If a tornado takes off enuf soil it should be considered a EF5.


I mean they don't get any ratings at all.
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Talking to myself. Not. Re: the storm mentioned above/below at 640, just be safe, all of you over there in Missouri! Good night, all you ships at sea or in a temporary port.
***


Latest Tor warning out of Topeka had a severe storm moving NE at 80 mph. Now, that's really something to note. If it's not a typo.

And goodnight wu, and you, too, Cosmic.
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Headed for MO. (edit: Big cell west of Lamar) may stay N of Joplin.

SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1021 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
CHEROKEE COUNTY IN SOUTHEAST KANSAS...
SOUTHERN BARTON COUNTY IN SOUTHWEST MISSOURI...
SOUTHERN CRAWFORD COUNTY IN SOUTHEAST KANSAS...
WESTERN JASPER COUNTY IN SOUTHWEST MISSOURI...

* UNTIL 1115 PM CST.

* AT 1018 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS
TRACKING A SEVERE THUNDERSTORM 15 MILES WEST OF SHERMAN...OR 15
MILES NORTHWEST OF OSWEGO...MOVING EAST AT 60 MPH. THIS STORM IS
CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM HAS A HISTORY OF
PRODUCING LARGE HAIL AND DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE AIRPORT DRIVE...ALBA...ARMA...BAXTER
SPRINGS...CARL JUNCTION...CARONA...CHEROKEE...COLUMBUS...
FRONTENAC...GALENA...GIRARD...IRON GATES...JASPER...JOPLIN...
LAMAR...MCCUNE...MINDENMINES...ORONOGO...PITTSBURG ...PURCELL...
SCAMMON...TREECE...WEBB CITY...WEIR AND WEST MINERAL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM CAPABLE OF PRODUCING LARGE HAIL AND
DAMAGING WINDS...IF YOU ARE IN ITS PATH SEEK SHELTER INDOORS AND STAY
AWAY FROM WINDOWS.
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MESOSCALE DISCUSSION 0173
NWS STORM PREDICTION CENTER NORMAN OK
0947 PM CST TUE FEB 28 2012

AREAS AFFECTED...ERN KS...WRN MO...CNTRL/ERN OK

CONCERNING...TORNADO WATCH 41...

VALID 290347Z - 290445Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 41 CONTINUES.

PRIMARILY A DAMAGING WIND THREAT PERSISTS WITH QLCS EXTENDING FROM
ERN KS INTO N-CNTRL OK...WITH A HISTORY OF MEASURED SEVERE WIND
GUSTS ACROSS S-CNTRL KS/N-CNTRL OK. A MORE ISOLATED DAMAGING WIND
RISK AND PERHAPS A BRIEF TORNADO MAY DEVELOP INTO PORTIONS OF WRN MO
ALONG THE NRN PORTION OF THE LINE...AND SWWD OF THE LINE ACROSS
CNTRL OK. AREAS DOWNSTREAM OF WW 41 ARE BEING MONITORED FOR POSSIBLE
WW ISSUANCE OR LOCAL WFO EXTENSIONS.

NRN PORTION OF QLCS HAS ESSENTIALLY OVERTAKEN AND PINCHED OFF THE
RICHER WARM SECTOR...WITH SURFACE DEW POINTS AOA THE UPPER 50S
REMAINING RELEGATED FROM SERN KS ON SWD. DESPITE THE PRESENCE OF
60-70 KT SWLYS AROUND 1 KM AGL PER AREA VWP AND PROFILER DATA...A
MEAGERLY BUOYANT DOWNSTREAM AIR MASS ACROSS MOST OF W-CNTRL/NWRN MO
SHOULD MITIGATE POTENTIAL FOR DAMAGING WINDS/TORNADOES BEYOND A
LOCALIZED/BRIEF THREAT.

FARTHER SW ACROSS SERN KS INTO NERN OK...A BROADER WARM SECTOR AND
STRONGER SURFACE PRESSURE RISE/FALL COUPLET WILL REMAIN CONDUCIVE TO
SCATTERED SEVERE WIND GUSTS AND POTENTIALLY A TORNADO OR TWO.

ADDITIONAL CU/SMALL CB DEVELOPMENT IS APPARENT DOWN TO THE RED
RIVER. ALTHOUGH REMOVED FROM THE LARGER INFLUENCE OF THE CNTRL
PLAINS SHORT WAVE TROUGH...70-80 KT EFFECTIVE SHEAR WOULD SUPPORT A
RISK FOR DAMAGING WINDS/BRIEF TORNADOES SHOULD TSTM DEVELOPMENT
BECOME SUSTAINED.

..GRAMS.. 02/29/2012

Line in SoCentral OK set up along outflow boundary of northern line. Looks like. Sure popped up quick. Was about to quit watching.

Plus that's where the dryline was - mostly 60-plus dwpts east of there.

I think NW AR and SW MO are in for a night of it.
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Evening all. Late check in.... just to say that after I gave up on getting any rain whatsoever from this system, an associated midlevel trough rained on us like crazy between noon and 2 pm today.... and I was stuck w/out internet, so couldn't even give a sitrep... lol

No discernable temp change seen here, but our local met promises us we'll get a cooldown with the front ya'll be talking about for Thursday through the weekend...

Later...

Member Since: October 25, 2005 Posts: 19 Comments: 22736
637. Skyepony (Mod)
Sea fog is coming in. Thick on 528.


Remember this one the other day?


NASA MODIS site~In late February, 2012, ships traveling over the Pacific Ocean off the coast of the western United States etched their movements in the sky above them, leaving trails of bright white clouds to mark their oceanic wanderings. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA%u2019s Aqua satellite captured this true-color image of ship trails in the sky on February 21, 2012.

Clouds are formed when water vapor condenses onto a small particle, such as dust or a salt crystal. Ships burn fossil fuel, and emit small aerosol particles which can effectively act as a nucleus for cloud formation.

While ships travel in this region constantly, clouds do not always form over their tracks. In order for such clouds to form, three things must occur. First, the ship must emit small particles in the exhaust, which provide the cloud condensation nuclei. Second, there must be very humid air in the ship%u2019s path, and third, the air surrounding the vessel must be non-turbulent. All three conditions were met on the day this image was captured.
Member Since: August 10, 2005 Posts: 227 Comments: 39457
Goodnight everyone! Cant wait to see what severe weather tmrw brings to GA.
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Quoting hurricanehunter27:
Ok first u have to go to configure polling, that is under "file" then Copy and past this link: http://mesonet.agron.iastate.edu/data/nexrd2/raw/
Click Apply and exit.
Then go back to "file" and start polling.
Also click on the radar sited it shows and u can move from site to radar site that way.
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Quoting SPLbeater:
well unless something changes with this gr2Analyst, i certainly wont be investing in it. wasting my time here.
Ok first u have to go to configure polling, that is under "file" then Copy and past this link: http://mesonet.agron.iastate.edu/data/nexrd2/raw/
Click Apply and exit.
Then go back to "file" and start polling.
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Quoting SPLbeater:
well unless something changes with this gr2Analyst, i certainly wont be investing in it. wasting my time here.


then you don't know how to use it then....
Member Since: September 2, 2007 Posts: 179 Comments: 20448
well goodnight all. be back tomorrow morning. :D

PEACE!!!
Member Since: August 4, 2011 Posts: 46 Comments: 4488
Quoting SPLbeater:


i am-was in a cheery mood when i found a new song full of deep bass notes. a must have for when my car uadio system is installed(once i git my vehicle)

Woot,woot,woot.Come on Thursday!.They build a Joe's crab shack a few minutes outside of D.C at Greenbelt Mall.I'm gonna go there.I've never been to Joe's crab shack...
Member Since: August 14, 2010 Posts: 10 Comments: 17850
well unless something changes with this gr2Analyst, i certainly wont be investing in it. wasting my time here.
Member Since: August 4, 2011 Posts: 46 Comments: 4488
Quoting washingtonian115:
No not really.I'm just looking forward to mah fat pay check come Thursday!.


i am-was in a cheery mood when i found a new song full of deep bass notes. a must have for when my car uadio system is installed(once i git my vehicle)

Member Since: August 4, 2011 Posts: 46 Comments: 4488
Quoting SPLbeater:


something really pleasant occur today?
No not really.I'm just looking forward to mah fat pay check come Thursday!.
Member Since: August 14, 2010 Posts: 10 Comments: 17850

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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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