Alert archive / Nebraska / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 252

May 11, 2005Phillips County, Sedgwick County, Colorado; 40 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at May 11, 2005, 2:55 PM MDT for Phillips County, Sedgwick County, Colorado; 40 counties in Nebraska. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
May 11, 2005, 2:55 PM MDT (20:55 UTC)
Expired
May 11, 2005, 11:00 PM MDT
In force
8 hr
Issued by
the Storm Prediction Center
All 42 counties

Phillips County, CO, Sedgwick County, CO, Adams County, NE, Arthur County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Chase County, NE, Clay County, NE, Colfax County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dodge County, NE, Fillmore County, NE, Frontier County, NE, Garden County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Hayes County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Perkins County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, York County, NE

The radar

The North Platte radar (KLNX), 78 km from the middle of the area, began a volume at 20:59 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

82 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 11, 2:59 PM MDTSevere Thunderstorm WarningLBFHayes46 min
May 11, 2:59 PM MDTSevere Thunderstorm WarningLBFLincoln61 min
May 11, 3:01 PM MDTTornado WarningGIDKearney44 min
May 11, 3:09 PM MDTSevere Thunderstorm WarningLBFFrontier51 min
May 11, 3:26 PM MDTTornado WarningGIDAdams64 min
May 11, 3:28 PM MDTSevere Thunderstorm WarningLBFMcPherson41 min
May 11, 3:36 PM MDTTornado WarningLBFFrontier39 min
May 11, 3:37 PM MDTSevere Thunderstorm WarningGIDDawson, Gosper53 min
May 11, 3:41 PM MDTTornado WarningGIDBuffalo, Kearney49 min
May 11, 3:43 PM MDTSevere Thunderstorm WarningLBFHayes47 min
May 11, 3:43 PM MDTSevere Thunderstorm WarningLBFLincoln62 min
May 11, 3:57 PM MDTSevere Thunderstorm WarningLBFLincoln48 min
May 11, 4:00 PM MDTSevere Thunderstorm WarningGIDHall60 min
May 11, 4:07 PM MDTTornado WarningLBFLincoln39 min
May 11, 4:12 PM MDTTornado WarningLBFFrontier48 min
May 11, 4:16 PM MDTSevere Thunderstorm WarningLBFKeith42 min
May 11, 4:23 PM MDTTornado WarningGIDAdams, Clay42 min
May 11, 4:26 PM MDTTornado WarningLBFChase49 min
May 11, 4:30 PM MDTFlash Flood WarningLBFFrontier90 min
May 11, 4:31 PM MDTTornado WarningGIDGosper46 min
May 11, 4:33 PM MDTSevere Thunderstorm WarningGIDDawson57 min
May 11, 4:37 PM MDTFlash Flood WarningGIDAdams, Hall4 hr
May 11, 4:44 PM MDTSevere Thunderstorm WarningGIDHamilton61 min
May 11, 4:44 PM MDTSevere Thunderstorm WarningLBFLincoln46 min
May 11, 4:48 PM MDTSevere Thunderstorm WarningLBFLincoln57 min
May 11, 4:51 PM MDTFlash Flood WarningLBFLincoln3 hr
May 11, 4:54 PM MDTSevere Thunderstorm WarningGIDHall66 min
May 11, 5:13 PM MDTSevere Thunderstorm WarningGIDMerrick62 min
May 11, 5:19 PM MDTTornado WarningGIDDawson56 min
May 11, 5:26 PM MDTSevere Thunderstorm WarningGIDPhelps64 min
May 11, 5:29 PM MDTSevere Thunderstorm WarningLBFLincoln46 min
May 11, 5:38 PM MDTTornado WarningLBFChase53 min
May 11, 5:40 PM MDTSevere Thunderstorm WarningGIDAdams52 min
May 11, 5:44 PM MDTSevere Thunderstorm WarningGIDBuffalo61 min
May 11, 5:45 PM MDTSevere Thunderstorm WarningGIDHamilton39 min
May 11, 5:55 PM MDTSevere Thunderstorm WarningLBFPerkins65 min
May 11, 6:07 PM MDTSevere Thunderstorm WarningGIDHall53 min
May 11, 6:14 PM MDTSevere Thunderstorm WarningLBFHayes46 min
May 11, 6:15 PM MDTFlash Flood WarningGIDMerrick3 hr
May 11, 6:16 PM MDTSevere Thunderstorm WarningGIDDawson45 min
May 11, 6:19 PM MDTFlash Flood WarningGIDDawson3 hr
May 11, 6:22 PM MDTSevere Thunderstorm WarningLBFLincoln23 min
May 11, 6:31 PM MDTSevere Thunderstorm WarningLBFCuster44 min
May 11, 6:41 PM MDTSevere Thunderstorm WarningLBFLincoln49 min
May 11, 6:43 PM MDTSevere Thunderstorm WarningGIDBuffalo, Sherman62 min
May 11, 6:51 PM MDTSevere Thunderstorm WarningGIDMerrick24 min
May 11, 6:56 PM MDTSevere Thunderstorm WarningGIDHall64 min
May 11, 7:01 PM MDTSevere Thunderstorm WarningLBFPerkins44 min
May 11, 7:08 PM MDTSevere Thunderstorm WarningGIDKearney67 min
May 11, 7:11 PM MDTSevere Thunderstorm WarningLBFChase, Hayes34 min
May 11, 7:20 PM MDTFlash Flood WarningGIDBuffalo4 hr
May 11, 7:25 PM MDTSevere Thunderstorm WarningLBFLincoln65 min
May 11, 7:34 PM MDTFlash Flood WarningGIDAdams, Buffalo, Clay, Dawson, Fillmore, Franklin and 18 more6 hr
May 11, 7:35 PM MDTSevere Thunderstorm WarningGIDHamilton, Merrick43 min
May 11, 7:39 PM MDTSevere Thunderstorm WarningGIDFillmore66 min
May 11, 7:42 PM MDTSevere Thunderstorm WarningGIDSherman34 min
May 11, 7:42 PM MDTSevere Thunderstorm WarningLBFHayes55 min
May 11, 8:10 PM MDTSevere Thunderstorm WarningLBFLincoln50 min
May 11, 8:13 PM MDTSevere Thunderstorm WarningGIDBuffalo62 min
May 11, 8:15 PM MDTSevere Thunderstorm WarningGIDKearney63 min
May 11, 8:19 PM MDTSevere Thunderstorm WarningLBFFrontier41 min
May 11, 8:28 PM MDTSevere Thunderstorm WarningGIDYork62 min
May 11, 8:31 PM MDTSevere Thunderstorm WarningGIDAdams13 min
May 11, 8:42 PM MDTSevere Thunderstorm WarningGIDFillmore63 min
May 11, 8:55 PM MDTSevere Thunderstorm WarningGIDAdams65 min
May 11, 9:02 PM MDTSevere Thunderstorm WarningGIDHall58 min
May 11, 9:13 PM MDTSevere Thunderstorm WarningLBFFrontier48 min
May 11, 9:15 PM MDTSevere Thunderstorm WarningGIDBuffalo60 min
May 11, 9:28 PM MDTSevere Thunderstorm WarningGIDYork54 min
May 11, 9:34 PM MDTSevere Thunderstorm WarningGIDGosper56 min
May 11, 9:38 PM MDTSevere Thunderstorm WarningGIDDawson55 min
May 11, 9:39 PM MDTSevere Thunderstorm WarningGIDFillmore66 min
May 11, 9:44 PM MDTSevere Thunderstorm WarningGIDHamilton61 min
May 11, 9:49 PM MDTSevere Thunderstorm WarningGIDKearney47 min
May 11, 9:56 PM MDTSevere Thunderstorm WarningGIDAdams, Hall64 min
May 11, 10:03 PM MDTSevere Thunderstorm WarningGIDMerrick57 min
May 11, 10:12 PM MDTSevere Thunderstorm WarningOAXButler, Seward33 min
May 11, 10:13 PM MDTSevere Thunderstorm WarningGIDBuffalo62 min
May 11, 10:25 PM MDTSevere Thunderstorm WarningGIDGosper, Harlan, Phelps65 min
May 11, 10:40 PM MDTSevere Thunderstorm WarningGIDFillmore22 min
May 11, 10:43 PM MDTSevere Thunderstorm WarningOAXButler, Seward47 min
May 11, 10:56 PM MDTSevere Thunderstorm WarningGIDAdams, Hall64 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.9 hours before the alert went out and 35 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 12:00Z on 2005-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 12:00Z on 2005-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 112053
SEL2  
SPC WW 112053
COZ000-NEZ000-120500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 252
NWS STORM PREDICTION CENTER NORMAN OK
355 PM CDT WED MAY 11 2005

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

       FAR NORTHEAST COLORADO
       CENTRAL AND A PART OF EASTERN NEBRASKA

EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 355 PM UNTIL MIDNIGHT CDT.

HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 105 MILES WEST OF
NORTH PLATTE NEBRASKA TO 25 MILES NORTH NORTHEAST OF LINCOLN
NEBRASKA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

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 245...WW 247...WW 248...WW
249...WW 250...WW 251...

DISCUSSION...INTENSE SEVERE THUNDERSTORMS IN THE FORM OF ELEVATED
SUPERCELLS WILL CONTINUE DEVELOPING NWD WITH A THREAT OF VERY LARGE
HAIL THIS EVENING ACROSS WATCH AREA.  THOUGH AREA REMAINS
COOL/STABLE AT THE SURFACE NORTH OF A STRONG COLD FRONT...VERY STEEP
MID LEVEL LAPSE RATES AND MODERATE ELEVATED CAPE WILL SUSTAIN A
THREAT OF SEVERE AS STORMS DEVELOP OVER KS/ERN CO AND MOVE NNEWD.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 20025.


...EVANS

415,1024 415,0963 402,0963 402,1024

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 6:00 PM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Denver, Logan, Morgan, Phillips and 4 more7 hr
May 11, 1:36 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Bent, Cheyenne, Crowley, Elbert and 7 more114 min
May 11, 2:10 PM MDTTornado WatchSPCCheyenne, Kit Carson, Prowers, Washington, Yuma7 hr
May 11, 4:13 PM MDTMesoscale DiscussionSPCCheyenne, Kiowa, Kit Carson, Prowers, Washington, Yuma92 min
May 10, 8:14 PM MDTMesoscale DiscussionSPCBurt, Butler, Colfax, Cuming, Dakota, Dodge and 10 more2 hr
May 11, 7:41 AM MDTMesoscale DiscussionSPCGage, Jefferson, Johnson, Nemaha, Pawnee, Richardson2 hr
May 11, 10:45 AM MDTTornado WatchSPCPawnee, Richardson7 hr
May 11, 1:55 PM MDTTornado WatchSPCAdams, Clay, Fillmore, Franklin, Gosper, Harlan and 7 more7 hr
May 11, 3:00 PM MDTMesoscale DiscussionSPCAntelope, Arthur, Blaine, Boone, Brown, Buffalo and 25 more2 hr
May 11, 3:53 PM MDTMesoscale DiscussionSPCAdams, Clay, Fillmore, Franklin, Gosper, Harlan and 7 more97 min
May 11, 5:45 PM MDTSevere Thunderstorm WatchSPCGage, Johnson, Nemaha, Pawnee, Richardson7 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2005Severe Thunderstorm Watches in Colorado, 2005Every severe thunderstorm watch in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.