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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Quoting GeorgiaStormz:


Possible Tornado


Does look like a possible - rain-wrapped?

Where is it?
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Quoting washingtonian115:
I don't know what this year will have in store for us.I'm not even going to make predictions of what places could be at could be hit.We'll see though.It is what it is.My magical wand hasn't been working that well.


Just be general and say "anywhere from Venezuela to Newfoundland". Considering there hasn't been a single year without a landfall, this predictor works rather well.
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Switching over to Friday's threat real quick...still looks like an active day. Here is what NWS Birmingham has to say about it. I have bolded the important parts:

THE FOCUS FOR FRIDAY WILL SHIFT TO THE APPROACHING BROAD-BASED UPPER
TROUGH THAT WILL PROGRESS EASTWARD THROUGH THE PLAINS. THE GFS AND
ECMWF HAVE FLIP-FLOPPED ON THE HANDLING OF THIS SYSTEM WITH THE GFS
SHOWING A MORE CONSOLIDATED TROUGH AXIS SWINGING ACROSS KANSAS WHILE
THE ECMWF SHOWS THE TROUGH SPLIT INTO TWO SHORTWAVES. PREVIOUS RUNS
OF THE ECMWF WERE MORE CONSISTENT IN SHOWING THE CONSOLIDATED
TROUGH AXIS...AND THE GFS HAS CONTINUED ITS TREND TOWARD SHOWING
THIS TYPE OF SOLUTION. WILL LEAN TOWARD THE GFS HANDLING FOR THIS
FORECAST.

AT THE SURFACE THE GFS SHOWS VIGOROUS DEEPENING OF THE SURFACE LOW
AS IT MOVES FROM SOUTHERN KANSAS TO THE GREAT LAKES...FROM 995 MB
12Z FRIDAY TO 971 MB 06 Z SATURDAY. THE SEVERE WEATHER THREAT WILL
BE HIGHER IF THIS SOLUTION VERIFIES...BUT IT WILL ALL DEPEND ON THE
EVOLUTION OF THE MID/UPPER LEVEL TROUGH. AN UPPER LEVEL JET MAX WILL
APPROACH FROM THE SOUTHERN PLAINS BY FRIDAY AFTERNOON LEADING TO
DIFFLUENCE ALOFT OVER OUR REGION. AS OPPOSED TO LINEAR FORCING...THE
BROAD NATURE OF THE LARGE SCALE ASCENT ASSOCIATED WITH APPROACHING
JET MAX SUPPORTS THE IDEA OF SUPERCELL DEVELOPMENT BY LATE FRIDAY
AFTERNOON ACROSS MISSISSIPPI AND NORTHWEST ALABAMA.
CAPE VALUES OF
1200 TO 1800 J/KG AND WESTERLY 0-6 KM SHEAR OF 65 TO 75 KNOTS
CROSSING THE WARM SECTOR ALSO ARGUES FOR SUPERCELL DEVELOPMENT IN
THE EARLY STAGES OF THIS EVENT. IF A STRONG SURFACE LOW FORMS AS
DEPICTED BY THE GFS...THE RAPID DEEPENING OF THE SURFACE LOW AND
VIGOROUS PRESSURE TROUGH ASSOCIATED WITH THE FRONT WOULD ALLOW FOR
BACKING SURFACE WINDS DURING THE LATE AFTERNOON. 0-1 KM HELICITY
VALUES IN EXCESS OF 400 M2/S2 ARE NOTED ON THE GFS LATE FRIDAY
AFTERNOON ACROSS THE NORTHWEST PART OF THE AREA WHERE SUPERCELL
DEVELOPMENT IS POSSIBLE...AND THIS COULD LEAD TO AN ENHANCED TORNADO
THREAT.
STRONG WIND PROFILES WILL ALSO SUPPORT A DAMAGING WIND
THREAT...AND LARGE HAIL WILL ALSO BE POSSIBLE. AT THIS TIME...THE
BEST THREAT APPEARS TO BE ACROSS THE NORTHERN HALF OF THE AREA FOR
FRIDAY AFTERNOON AND EVENING. A TRANSITION TOWARD A SQUALL IS
EXPECTED OVERNIGHT AS THE FORCING BECOMES MORE ASSOCIATED WITH THE
COLD FRONT.
HELICITY VALUES MAY REMAIN QUITE HIGH AS A 60 KT LOW
LEVEL JET DEVELOPS AND THIS WOULD SUPPORT A CONTINUING DAMAGING WIND
AND TORNADO THREAT AS THE LINE MOVES ACROSS THE STATE.
THE FRONT
SHOULD CLEAR THE AREA BY NOON SATURDAY LEADING TO MUCH DRIER AND
COOLER CONDITIONS AND ENDING THE SEVERE WEATHER THREAT. WITH THIS
SYSTEM STILL 3 DAYS AWAY...THE AFOREMENTIONED POSSIBLE EVOLUTION OF
THIS EVENT IS SUBJECT TO CHANGE.
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Quoting KoritheMan:


I think we'll have a warm neutral transitioning to El Nino. A good analog year, IMO, would be 1968. But we probably won't see the dearth of major hurricanes we saw in that year.



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All I can see is a wall cloud, but the tornado could be rain wrapped.

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Here's the MCD that goes with the new tornado watch.


MESOSCALE DISCUSSION 0168
NWS STORM PREDICTION CENTER NORMAN OK
0515 PM CST TUE FEB 28 2012

AREAS AFFECTED...CNTRL/ERN KS

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE


VALID 282315Z - 290115Z

ISOLATED DISCRETE CELLS ARE ATTEMPTING TO FORM S OF WW 39 ALONG THE
DRYLINE IN S-CNTRL KS. GIVEN PRESENCE OF VERY STRONG AND DRY
MID-LEVEL SWLYS AMIDST MODEST INSTABILITY...UNCERTAINTY EXISTS IN
THE SUSTAINABILITY OF TSTM DEVELOPMENT IN THE NEAR-TERM. LATER THIS
EVENING...AS THE PACIFIC COLD FRONT OVERTAKES THE DRYLINE...TSTMS
APPEAR MORE LIKELY INTO ERN KS WITH ALL MODES OF SEVERE THREATS
POSSIBLE. THE PROBABILITY OF A WW ISSUANCE BY 01Z IS 60 PERCENT.

23Z SURFACE ANALYSIS PLACED A 993 MB CYCLONE NEAR LBF WITH AN
ATTENDANT DRYLINE DRAPED SWD THROUGH CNTRL KS...AND A PACIFIC COLD
FRONT ARCING SWWD FROM THE LOW ACROSS NWRN KS. TCU/SMALL CBS ARE
APPARENT IN VISIBLE IMAGERY INTO S-CNTRL KS...WITH CU FIELD HAVING
DIMINISHED FARTHER S IN WRN OK. SURFACE DEW POINTS SHOULD CONTINUE
TO RISE AHEAD OF THE DRYLINE...WITH MIDDLE TO UPPER 50S BECOMING
COMMON THIS EVENING. STILL...GIVEN THE PRESENCE OF A MID-LEVEL DRY
SLOT EVIDENT IN WATER VAPOR IMAGERY AND 100 KT JET STREAK AT 500
MB...BUOYANCY WILL LIKELY REMAIN MODEST WITH MLCAPE OF 500 TO 1000
J/KG. ENTRAINMENT OF DRY AIR ALONG WITH THE INTENSE MID-LEVEL WINDS
MAY CURTAIL SUSTAINED TSTM DEVELOPMENT S/SE OF WW 39 UNTIL THE COLD
FRONT OVERTAKES THE DRYLINE /AS INFERRED FROM MOST
CONVECTION-ALLOWING MODEL GUIDANCE/.

..GRAMS.. 02/28/2012
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Oops, forgot to post that Tornado Watch #40 was issued.



URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 40
NWS STORM PREDICTION CENTER NORMAN OK
545 PM CST TUE FEB 28 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

CENTRAL KANSAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 545 PM UNTIL
1100 PM CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF
SALINA KANSAS TO 45 MILES SOUTH OF WICHITA KANSAS. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 39...

DISCUSSION...CONVECTION HAS INCREASED ALONG THE DRYLINE...AND A FEW
SUSTAINED STORMS MAY EMERGE IN THE NEXT 1-2 HOURS WITHIN THE WEAK
INSTABILITY/STRONG VERTICAL SHEAR ENVIRONMENT. THE EXTREMELY STRONG
DEEP-LAYER SHEAR WILL TEND TO DELAY STORM MATURATION...BUT A
SUFFICIENTLY MOIST AND STRONG LOW-LEVEL SHEAR ENVIRONMENT WILL FAVOR
SOME RISK FOR A TORNADO OR TWO WITH ANY PERSISTENT SUPERCELLS.
OTHERWISE...ISOLATED LARGE HAIL AND DAMAGING GUSTS WILL BE POSSIBLE.
LATER TONIGHT...THERE WILL ALSO BE SOME RISK FOR ADDITIONAL STORM
DEVELOPMENT AS THE COLD FRONT OVERTAKES THE DRYLINE ACROSS
CENTRAL/ERN KS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
400. MEAN STORM MOTION VECTOR 24050.


...THOMPSON
Member Since: July 6, 2010 Posts: 113 Comments: 32504
Quoting KoritheMan:


I think we'll have a warm neutral transitioning to El Nino. A good analog year, IMO, would be 1968. But we probably won't see the dearth of major hurricanes we saw in that year.
I don't know what this year will have in store for us.I'm not even going to make predictions of what places could be at could be hit.We'll see though.It is what it is.My magical wand hasn't been working that well.
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Quoting MAweatherboy1:

It appears to be a computer model's depiction of the weather of North America and surrounding waters several days from now.
This=funny.LOL.I'm sarcastic at times as well.I got your back in case anyone wants to get SMART(sarcastic flag on).
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Quoting WxGeekVA:


Yes, but more specifically what is that blob which appears to be a tropical storm next to Florida?


A long-range weather prediction by a global model that, save for awakening our inner nerdiness, is of little use at such a distant juncture.
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Quoting KoritheMan:


I think we'll have a warm neutral transitioning to El Nino. A good analog year, IMO, would be 1968. But we probably won't see the dearth of major hurricanes we saw in that year.

lol, dearth.
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Quoting washingtonian115:
I think El Nino will be developing around that time IMO.


I think we'll have a warm neutral transitioning to El Nino. A good analog year, IMO, would be 1968. But we probably won't see the dearth of major hurricanes we saw in that year.
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Quoting MAweatherboy1:

It appears to be a computer model's depiction of the weather of North America and surrounding waters several days from now.


Yes, but more specifically what is that blob which appears to be a tropical storm next to Florida?
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Quoting GeorgiaStormz:


Possible Tornado

I think it's just a wall cloud but it's not impossible there's a tornado in there
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Quoting KoritheMan:


I really don't see why some people are saying a full-fledged El Nino. Kelvin waves warm the Pacific all the time, sometimes significantly, like this recent one. That doesn't mean we're going to quickly transition to El Nino before June 1.
I think El Nino will be developing around that time IMO.
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Possible Tornado
Member Since: February 11, 2012 Posts: 0 Comments: 9737
Quoting KoritheMan:


Smartass. >_>

Haha, I was just about to post the exact same thing.
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Quoting MAweatherboy1:

It appears to be a computer model's depiction of the weather of North America and surrounding waters several days from now.


Smartass. >_>
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Quoting WxGeekVA:
Wait... What in the heck is this on the GFS?!?!


It appears to be a computer model's depiction of the weather of North America and surrounding waters several days from now.
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There is a wall cloud, but from what I can see, no tornado. That doesn't mean there isn't one though.
Member Since: July 6, 2010 Posts: 113 Comments: 32504
Wait... What in the heck is this on the GFS?!?!

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darkness falls
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Quoting CybrTeddy:


Interesting, they're only expecting neutral conditions by fall.


I really don't see why some people are saying a full-fledged El Nino. Kelvin waves warm the Pacific all the time, sometimes significantly, like this recent one. That doesn't mean we're going to quickly transition to El Nino before June 1.
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Quoting TropicalAnalystwx13:
Most pronounced rotation so far today.


By far... Very good chance there will be a tornado with this storm
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Most pronounced rotation so far today.

Member Since: July 6, 2010 Posts: 113 Comments: 32504
Tornado warning for Mitchell and Jewell County.
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I see 2 tornado warnings coming on this map, the one in the north and especially the one in the south:


On this link, and earlier there was a funnel cloud. It looks interesting now.

also where the last tornado hit, i saw ice and snow on the ground.
Member Since: February 11, 2012 Posts: 0 Comments: 9737
Much better.

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HASTINGS NE
524 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN HASTINGS HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHEASTERN JEWELL COUNTY IN NORTH CENTRAL KANSAS...
NORTHEASTERN MITCHELL COUNTY IN NORTH CENTRAL KANSAS...

* UNTIL 600 PM CST

* AT 521 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR BELOIT...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
RANDALL...SCOTTSVILLE AND FORMOSO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT
WAS IN EFFECT FOR THE SAME AREA.
Member Since: July 6, 2010 Posts: 113 Comments: 32504
Quoting StormTracker2K:
Probably won't happen but this is interesting. Someone needs to tell the GFS that it's March not June.



As you said, this will almost certainly not happen, but it's still interesting to note how models are seeing conditions over the Gulf in Feb./Mar. that could support a tropical system.
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Quoting MrBoujangles:
The GFS spins things up at 336hrs every single run as long as it isn't Jan/Feb and it STILL does spin things up every once in a while in those months. As such, it is not interesting.
Weeeeel we did have an interesting tropical disturbance earlier this month where the modles picked up on it in advance..Not saying this will be the case this time.
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Where's the tornado warning on this?! There has to be a tornado on the ground with the yellow TVS.

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Just bought the Davis Vantage Pro 2 weather station. Im here in the Tampabay area so I will be gladly posting local conditions on here in the near future :)
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Quoting Barefootontherocks:


Please be real careful and specific when making such statements or you might confuse the issue for someone under a warning.

If you read the official updates, you can see the tor warnings in NB were canceled in segments. If you click the station ID, this Severe Weather Warnings Page will give you official warning updates as soon as they are out, simultaneously or within a minute or less of official weather radio announcements.

You have a neat tool there with your analyst. Just bear in mind people under the gun, especially those in rural areas, might be reading your words.

Well I hope they're not taking what I'm saying to heart, they should be listening to their weather radio. =)
Member Since: July 6, 2010 Posts: 113 Comments: 32504
Quoting TropicalAnalystwx13:

Well, according to GR2Analyst, the tornado warning has been cancelled. There is a chaser on the storm, and I see a mesocyclone, but no tornado.


Please be real careful and specific when making such statements or you might confuse the issue for someone under a warning.

If you read the official updates, you can see the tor warnings in NB were canceled in segments. If you click the station ID, this Severe Weather Warnings Page will give you official warning updates as soon as they are out, simultaneously or within a minute or less of official weather radio announcements.

You have a neat tool there with your analyst. Just bear in mind people under the gun, especially those in rural areas, might be reading your words.
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Quoting BobWallace:


Headline designed to knot bloomers.

But if one reads past the headline...

"NOAA officials say the cuts aren't sacrificing public safety. For one, they say the buoy system will still operate despite chances it will take longer for NOAA crews to repair broken buoys at sea. And the outreach programs already have created computer risk maps, paid for thousands of coastal warning signs and funded materials for schools and civic groups, said Susan Buchanan, a NOAA spokeswoman."

Face it, if we want to cut spending and are not willing to make the super-wealthy pay their fair share then we don't get everything we want.

It's a choice, do we get extra tsunami buoys or do McCain, Mittens and their friends get to buy yet another houses and yachts?


Well, I would prefer a full operational buoy system and if one breaks down, I would want it repaired asap, not when they can. It could be a critical buoy.
Member Since: September 30, 2007 Posts: 9 Comments: 15961
Some of the storms are in near 35-40 degree temperatures. Awesome.
Member Since: February 11, 2012 Posts: 0 Comments: 9737
dOES ANY1 HAVE A RADAR IMAGE OF THE HOOK ECHO?
i MISSED IT.
Member Since: February 11, 2012 Posts: 0 Comments: 9737
Screenshot of the earlier tornado.

Member Since: July 6, 2010 Posts: 113 Comments: 32504
The GFS spins things up at 336hrs every single run as long as it isn't Jan/Feb and it STILL does spin things up every once in a while in those months. As such, it is not interesting.
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Quoting StormTracker2K:
Police Make Arrest In 'The Senator' Fire
3,500-Year-Old Tree Burned Down In Jan.


Read more: http://www.wesh.com/news/30562154/detail.html#ixzz 1niUVAavL

LONGWOOD, Fla. -- The Division of Forestry said Tuesday that an arrest has been made in relation to the fire of 'The Senator.'
Sara Barnes, 26, said she regularly went to the tree site to use drugs and lit a fire that night so she could see and said it got out of control. The 3,500-year-old bald cypress burned down last month in a fire.

Officials said they found images of the fire being started on Barnes laptop and on her cellphone.

Some people believe that the tree is still alive. They have spotted saplings at the base of the big tree.

Officials also said that the tree was cloned at one point, and they are searching to bring the clones back.

The park will remained closed until the investigation into the fire that destroyed the Senator is completed.





I was upset when I heard that tree was burnt down, and I'm not sure I believe the story of the person either. It seems more intentional because lighting a camp fire that got out of control wouldn't just burn down that tree, to burn that tree would either require an already large forest fire that moved through the area, or it was intentionally set on fire. I mean, I don't know that for sure, but when you think about it, intentional seems far more likely.
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Probably won't happen but this is interesting. Someone needs to tell the GFS that it's March not June.


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image credit: CIMSS
(add: This is an experimental product.)
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The Tornado Warning has been replaced with a Severe Thunderstorm Warning.

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTH PLATTE NE
445 PM CST TUE FEB 28 2012

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
WESTERN BLAINE COUNTY IN NORTH CENTRAL NEBRASKA...
NORTHWESTERN CUSTER COUNTY IN CENTRAL NEBRASKA...
EASTERN LOGAN COUNTY IN WEST CENTRAL NEBRASKA...
EASTERN THOMAS COUNTY IN NORTH CENTRAL NEBRASKA...

* UNTIL 530 PM CST

* AT 442 PM CST...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 5 MILES
NORTH OF TARBOZ LAKE...OR 10 MILES NORTHEAST OF STAPLETON...AND
MOVING NORTH AT 70 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
HALSEY AROUND 500 PM CST.

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE HIGHWAY
2 MILE MARKER 230.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF THESE
STORMS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE WEATHER...
INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE WINDS AND
POSSIBLY TORNADOES. MOVE QUICKLY TO A SAFE SHELTER...PREFERABLY INTO
AN INTERIOR ROOM...SUCH AS A BATHROOM OR A CLOSET...OR INTO A
BASEMENT.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
Member Since: July 6, 2010 Posts: 113 Comments: 32504
Quoting TropicalAnalystwx13:

See, that's an upside to GR2Analyst. You'll know the exact time a tornado warning expires, like this one. Of course, it will show until 4:45 PM CDT, but it has already been cancelled. :)

Yeah, I think your right. I don't see any rotation with that storm.
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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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