Wunderground launches new Local Climate Change section

By: Dr. Jeff Masters , 6:10 PM GMT on April 20, 2012

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In honor of Earth Day on Sunday, wunderground has launched a new Climate Change Center, which gives people resources to understand how the climate is changing both globally and in their local neighborhoods. I am particularly pleased with our Local Climate Change feature, which allows one to see how temperature and precipitation have changed over the past 100+ years at the nearest station with a long period of measurements. Predictions from climate models on what the next 100 years may bring are overlaid for each station. Data for most U.S. stations goes back to 1895; we have data for a few stations in Europe that extend back to the 1700s. Berlin has the longest period of record in this database, with data back to 1702.


Figure 1. Screenshot of the Local Climate Change page for Washington, DC. Measured temperatures since 1820 are shown in grey. By clicking on the "Show post-1900 trend:" box, we see that the trend since 1900 has been for an increase in temperature of 1.5°C (2.7°F) per century. Moving the thin vertical red line over the image using the mouse shows that the warmest year on record in Washington D.C. was 1991. Predictions for a future with low emissions of heat-trapping gases like carbon dioxide are shown in yellow; the high emissions prediction is shown in red. Separate tabs are available to examine precipitation and snow.

Skeptical?
Also included in the new Climate Change Center is a section addressing the common skeptical arguments made against climate change. We offer three levels of explanation. The "Basic" level is the default, but one can also see more technical in-depth discussions by clicking on the "See All Explanation Levels" link. The material was developed by physicist John Cook for his excellent skepticalscience.com web site, which is widely referenced in the climate science communication community.


Video 1. I'm featured in this video on extreme weather and climate change done by veteran videographer Peter Sinclair for the Yale forum on Climate Change and the Media this month. I'm also featured in Part 1 of this series. Our new Climate Change Center has a section for climate change videos, which includes a twice-monthly feature from GreenTV detailing the world's notable wild weather events of the past two weeks.

Earth: the Operator's Manual airs Sunday night
Penn State climate scientist Dr. Richard Alley hosts parts II and III of Earth: the Operator's Manual on PBS beginning at 7pm Sunday, April 22--Earth Day. Part I of this excellent series aired in April 2011. The series gives an overview of climate change, but primarily focuses on what we can do to help slow down climate change though smart energy choices. Dr. Alley, a registered Republican, geologist, and former oil company employee, is the Evan Pugh Professor of Geosciences at the Pennsylvania State University, and one of the most respected and widely published world experts on climate change. Dr. Alley has testified before Congress on climate change issues, served as lead author of "Chapter 4: Observations: Changes in Snow, Ice and Frozen Ground" for the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), and is author of more than 170 peer-reviewed scientific articles on Earth's climate. He is also the author of a book I highly recommend--The Two Mile Time Machine, a superb account of Earth's climate history as deduced from the 2-mile long Greenland ice cores. Dr. Alley is an excellent and engaging speaker, and I highly recommend listening to his 45-minute keynote speech, "The Biggest Control Knob: CO2 in Earth's Climate History", given at the 2010 American Geophysical Union meeting, via this very watchable recording showing his slides as he speaks in one corner of the video. If you want to understand why scientists are so certain of the link between CO2 and Earth's climate, this is a must-see lecture.

Have a great weekend, everyone, and I'll be back Monday with a new post. I'd like to thank Wunderground meteorologist, Angela Fritz for spearheading the creating the new Climate Change Center; it's a product I'll be referring to frequently in the future, and one we'll be updating in the coming months with data on local sea level rise, fire risk, and drought.

Jeff Masters

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Member Since: Posts: Comments:
Quoting bohonkweatherman:
Strong High Pressure, please don't send that Heat to Texas we want an Off Year here from the stinking heat.


Wish I had control over it. It wouldn't be in either place. Wish I could just sell it to the highest bidder and be done with it. Anybody want to trade the heat for some rain for West Texas.
Member Since: February 29, 2012 Posts: 0 Comments: 6260
Quoting PedleyCA:
Hot here today, Riverside was 99 . Was 94.7 here which is
where NW Riverside (now Jurupa Valley) is.
Strong High Pressure, please don't send that Heat to Texas we want an Off Year here from the stinking heat.
Member Since: July 5, 2009 Posts: 0 Comments: 1348
Here comes a line of storms.

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Here's a better image:
Member Since: September 3, 2011 Posts: 13 Comments: 3477
Hot here today, Riverside was 99 . Was 94.7 here which is
where NW Riverside (now Jurupa Valley) is.
Member Since: February 29, 2012 Posts: 0 Comments: 6260
Quoting CaicosRetiredSailor:
Popocatepetl Volcano Webcam:


http://www.cenapred.unam.mx/popo/UltimaImagenVolc anI.html

Thanks for that link,
Member Since: February 29, 2012 Posts: 0 Comments: 6260
Quoting WxGeekVA:
Has anyone seen this craziness yet?

If it pans out--and that's still a big if at this point--the two largest northeast snowfalls of the winter will have been in October and April. That is, not in winter at all...
Member Since: November 8, 2009 Posts: 4 Comments: 13806
04/20/2012 0553 PM

N Fort Pierce, St Lucie County.

Hail e1.00 inch, reported by trained spotter.


Nickel to quarter hail. Wind gust 40 to 50 mph.

04/20/2012 0536 PM

3 miles WNW of Indrio, St Lucie County.

Hail m1.00 inch, reported by trained spotter.


Skywarn spotter reported dime to quarter size hail near
intersection of Ocala Ave. And Kings Highway in Lakewood
Park.


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Has anyone seen this craziness yet?

Member Since: September 3, 2011 Posts: 13 Comments: 3477
Quoting WxGeekVA:


2nd one didn't work...

I know i can't figure out why....
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2230 UNK 4 NNW JUPITER MARTIN FL 2698 8013 MARTIN CO EM RELAYED REPORT FROM FIRE/RESCUE OF FOUR POWER POLES SNAPPED OFF, TREES UPROOTED, TWO HOMES WITH STRUCTURAL DAMAGE, POSSIBLE TORNADO. TIME QUESTIONABLE. (MLB)

2226 59 2 N ALTAMONTE SPRINGS SEMINOLE FL 2869 8140 1 MILE NW OF SANLANDO SPRINGS GUST FROM DAVIS PRO. PENNY TO DIME SIZE HAIL. 5.23 INCHES OF RAIN.

2231 100 DEBARY VOLUSIA FL 2888 8131 NICKEL TO QUARTER HAIL. RAIN 1 TO 1.50 INCHES IN A HALF HOUR.
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Quoting thunderbug91:


2nd one didn't work...
Member Since: September 3, 2011 Posts: 13 Comments: 3477
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yes, thanks!
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Popocatepetl Volcano Webcam:


http://www.cenapred.unam.mx/popo/UltimaImagenVolc anI.html
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Quoting thunderbug91:
Could anybody please help show me how to upload GIFs and visual images instead of just links? I'm having a little difficulty... thanks


Click on the image you want, "Copy Image Location", then go to Image above the comment area. Click on it, remove the http:// thing, and then paste it. I you aren't sure it worked, go to Preview Comment first. That helpful?
Member Since: September 3, 2011 Posts: 13 Comments: 3477
Could anybody please help show me how to upload GIFs and visual images instead of just links? I'm having a little difficulty... thanks
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Link
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The GOM is generating some more strong storms off Clearwater...
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Squally night for our area here...Link
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Quoting RTSplayer:


Doesn't look like much happening between Tampa and Orlando right now.

There isn't even a severe hail threat anywhere in the state right now.

Highest VIL in a storm I could find is 25kg, which is pretty much nothing, and max hail size warning on any cell in the state right now is less than a half inch. That's not going to hurt anything.

thank you!
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Quoting Littleninjagrl:


Thank you SO much!


No problem. Lived up there for about 4 years. I-4 is enough to worry about without storms ;o)
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Here it comes into middle TN

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Quoting charlottefl:



I-4 is clear at the moment.



Thank you SO much!
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re: #233, you are right about that coral being hard to dig up, Hydrus!

Last weekend I sought out a tropical-fruit grower on nearby Pine Island, and we were talking about how much drier than normal the last few years here have been. Though I've only been here 3 years, I suspect the colder outflow from the Caloosahatchee has always surrounded us with sinking air; you can watch summer t-storms coming from Ft. Myers just fall apart when they hit the river.

But according to this long-time farmer, rainy season at least in our area has grown shorter and shorter in duration, and no longer lasts for many months. I'm not sure what to attribute that to: Perhaps warmer air aloft giving us more days where clouds are unable to break a cap, perhaps warmer air in general being able to hold more moisture without surrendering it as rain.

At any rate, it's just depressing around here. I've watched rain go around us for weeks, sometimes just missing us by about 5 miles or so. I really hope this weekend gives us a long, persistent soaking.
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Quoting Littleninjagrl:
will Tampa be getting any thing tonight? Also, my son left Tampa about an hour ago to drive to Orlando, FL and now i'm worried seeing posts about hail and warnings and such =[


Doesn't look like much happening between Tampa and Orlando right now.

There isn't even a severe hail threat anywhere in the state right now.

Highest VIL in a storm I could find is 25kg, which is pretty much nothing, and max hail size warning on any cell in the state right now is less than a half inch. That's not going to hurt anything.
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Quoting Littleninjagrl:
will Tampa be getting any thing tonight? Also, my son left Tampa about an hour ago to drive to Orlando, FL and now i'm worried seeing posts about hail and warnings and such =[



I-4 is clear at the moment.

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will Tampa be getting any thing tonight? Also, my son left Tampa about an hour ago to drive to Orlando, FL and now i'm worried seeing posts about hail and warnings and such =[
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Wet night for the FL east coast.

000
FXUS62 KMFL 210003
AFDMFL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
803 PM EDT FRI APR 20 2012

.UPDATE...
SENT UPDATE TO INCREASE POPS ACROSS ALL OF SOUTH FLORIDA THIS
EVENING...ESPECIALLY ACROSS PALM BEACH AND BROWARD COUNTIES AND
ACROSS LAKE OKEECHOBEE. SHOWERS AND THUNDERSTORMS CONTINUE TO PUSH
TO THE EAST BUT ARE ALSO BACK BUILDING. STRONGEST STORMS ARE IN A
WEAKENING PHASE AND SHOULD CONTINUE TO WEAKEN THROUGH THE LATE
EVENING HOURS.
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238. Skyepony (Mod)
Had .90" so far. Spotted a hail cell that turned mesocyclone. Started off more green with less impressive wall cloud then faded more gray as it began to broadly rotate. Saw a few scud clouds but no funnels. There was lighting, though not copious.



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Quoting hydrus:
I wonder if Canada will let us return this to them..

That jet stream trough is coming all the way down to Florida... It's going to be an interesting Saturday here for us..
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Quoting OrchidGrower:
Glad to see so many in Florida getting rain already, but feeling like it's NEVER going to rain again in Cape Coral....

MAweatherboy, sounds like it's time to get away from Indonesia for a few days/weeks/lifetimes!

Yeah, lol... I've always wanted to feel a weak quake though... Some areas up here felt the DC quake last August but I didn't... I think I'll probably need to move if I want to feel one since we don't get many up here!
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I wonder if Canada will let us return this to them..
Member Since: September 27, 2007 Posts: 1 Comments: 22728
Quoting thunderbug91:
Lots of CAPE over FL tomorrow....Link


Evening Everyone!! That's fairly impressive for FL. Tomorrow should definitely be an interesting day. I think the theme of the day will more than likely be wind damage, however, looks like the SPC is saying a few tornadoes are possible.
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Quoting OrchidGrower:
Glad to see so many in Florida getting rain already, but feeling like it's NEVER going to rain again in Cape Coral....

MAweatherboy, sounds like it's time to get away from Indonesia for a few days/weeks/lifetimes!
Did some surveying with my Dad in Cape Coral in the 70,s. The transit was getting a soaking on a regular basis back then. We also found out that Cape Coral is really made of coral, and it is tough stuff to dig up.
Member Since: September 27, 2007 Posts: 1 Comments: 22728
SPC AC 201718

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1218 PM CDT FRI APR 20 2012

VALID 211200Z - 221200Z

...THERE IS A SLGT RISK OF SVR TSTMS OVER MUCH OF THE FL
PENINSULA...

...SYNOPSIS...
AN UPPER LOW WILL MOVE EWD ACROSS THE GULF OF MEXICO WITH A 70 KT
MIDLEVEL SPEED MAX APPROACHING THE FL KEYS BY 00Z. LOW PRESSURE WILL
ALSO DEEPEN OVER THE ERN GULF...WITH SLY FLOW MAINTAINING LOW LEVEL
MOISTURE OVER THE PENINSULA. WIDESPREAD RAIN AND STORMS WILL OCCUR
AS A RESULT...THROUGH THE PERIOD INCLUDING OVERNIGHT.

TO THE N...A POSITIVELY TILTED UPPER TROUGH AXIS WILL EXTEND FROM
THE LOWER GREAT LAKES INTO THE APPALACHIANS WITH A WEAK COLD FRONT
FROM ERN PA INTO WRN VA AND NC.

...FL...
VEERING WIND PROFILES WITH HEIGHT WILL INCREASE ACROSS FL DURING THE
DAY AND INTO THE EVENING AS LOW PRESSURE DEEPENS ACROSS THE ERN GULF
AND THE UPPER LOW NEARS. RAIN AND A FEW THUNDERSTORMS WILL BE
ONGOING...AND SHOULD PERSIST THROUGHOUT THE DAY. INSTABILITY OVERALL
WILL BE MARGINAL FOR SEVERE...BUT HODOGRAPHS WILL LENGTHEN AND
BECOME FAVORABLE FOR ROTATION. CONVERGENCE MAY BE MAXIMIZED ALONG A
BOUNDARY OVER THE N CNTRL PENINSULA DURING THE DAY...WITH SPORADIC
DEVELOPMENT POSSIBLE ELSEWHERE. ANOTHER CONCENTRATED AREA OF STORMS
MAY BE WITH THE VORT MAX...PERHAPS IN AN ARCING LINE...AS IT MOVES
ASHORE. SHEAR PROFILES WILL REMAIN FAVORABLE FOR EMBEDDED COUPLETS
WITH ENHANCED DAMAGING WIND POTENTIAL AND A FEW TORNADOES.
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3/4 inch hail and gust of 50 plus in deltona fl
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Quoting ScottLincoln:


When storms are close to the radar site and one believes that they may be seeing contaminated data with clutter, higher tilts should be used to get the full picture. All the tilts now show the appendage and associated area of weak rotation across the border into Mexico. As such, the warning was just canceled.

Good news! I was getting pretty worried when the NWS used the term significant tornado as this thing was heading for the city... Looks like it turned out well though.
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Lots of CAPE over FL tomorrow....Link
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Quoting MAweatherboy1:

Yeah, but the storm's so close to the radar site now it's hard to figure anything out


When storms are close to the radar site and one believes that they may be seeing contaminated data with clutter, higher tilts should be used to get the full picture. All the tilts now show the appendage and associated area of weak rotation across the border into Mexico. As such, the warning was just canceled.
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Quoting ScottLincoln:

The section of the storm that was capable of producing a weak tornado appears to have moved into Mexico on the 0003UTC scan.

Yeah, but the storm's so close to the radar site now it's hard to figure anything out
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Quoting MAweatherboy1:

It looks to have weakened some but the city of Brownsville is under a tornado warning.

The section of the storm that was capable of producing a weak tornado appears to have moved into Mexico on the 0003UTC scan.
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Quoting ScottLincoln:


To be honest, it doesn't really look all that bad right now. Beam was sampling at ~1500ft when the warning was first issued. Rotation is fairly weak at the low levels, mostly just an area of convergence. Looks kind of outflow-dominant at the surface and those types of supercells have trouble producing tornadoes, especially stronger, long-track tornadoes. Storm is moving toward the radar and the beam sampling height is going down quickly as it does; as such, we will have a much better chance of sampling a significant tornado if one were to occur.

It looks to have weakened some but the city of Brownsville is under a tornado warning.
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Quoting MAweatherboy1:
How come no one's paying attention to this? We may soon see a tornado warning or tornado emergency for Brownsville


To be honest, it doesn't really look all that bad right now. Beam was sampling at ~1500ft when the warning was first issued. Rotation is fairly weak at the low levels, mostly just an area of convergence. Looks kind of outflow-dominant at the surface and those types of supercells have trouble producing tornadoes, especially stronger, long-track tornadoes. Storm is moving toward the radar and the beam sampling height is going down quickly as it does; as such, we will have a much better chance of sampling a significant tornado if one were to occur.
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Member Since: July 3, 2005 Posts: 428 Comments: 129910
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Quoting OrchidGrower:
Glad to see so many in Florida getting rain already, but feeling like it's NEVER going to rain again in Cape Coral....

MAweatherboy, sounds like it's time to get away from Indonesia for a few days/weeks/lifetimes!


My cousin has a wife in Indonesia wishing to immigrate to down here (Louisiana).
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Glad to see so many in Florida getting rain already, but feeling like it's NEVER going to rain again in Cape Coral....

MAweatherboy, sounds like it's time to get away from Indonesia for a few days/weeks/lifetimes!
Member Since: Posts: Comments:

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About

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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