Alert archive / Nebraska / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 457

August 9, 201419 counties in Kansas; 48 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Aug 9, 2014, 3:03 PM CDT for 19 counties in Kansas; 48 counties in Nebraska. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Aug 9, 2014, 3:03 PM CDT (20:03 UTC)
Expired
Aug 10, 2014, 12:00 AM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 67 counties

Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Jewell County, KS, Logan County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Adams County, NE, Arthur County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Chase County, NE, Cherry County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thayer County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The North Platte radar (KLNX), 83 km from the middle of the area, began a volume at 20:04 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Aug 9, 3:29 PM CDTSevere Thunderstorm WarningLBFHooker, Thomas46 min
Aug 9, 3:41 PM CDTSevere Thunderstorm WarningGLDCheyenne, Sherman64 min
Aug 9, 3:50 PM CDTTornado Warning Tornado observedGLDCheyenne25 min
Aug 9, 4:01 PM CDTSevere Thunderstorm WarningGLDSherman, Wallace59 min
Aug 9, 4:08 PM CDTTornado WarningGLDCheyenne, Sherman52 min
Aug 9, 4:14 PM CDTSevere Thunderstorm WarningLBFHooker, Thomas46 min
Aug 9, 4:50 PM CDTSevere Thunderstorm WarningGLDWallace55 min
Aug 9, 4:55 PM CDTSevere Thunderstorm WarningGLDCheyenne37 min
Aug 9, 4:59 PM CDTTornado Warning Tornado observedGLDCheyenne, Sherman46 min
Aug 9, 4:59 PM CDTSevere Thunderstorm WarningLBFLogan, Thomas46 min
Aug 9, 5:04 PM CDTSevere Thunderstorm WarningLBFGrant, Hooker41 min
Aug 9, 5:16 PM CDTSevere Thunderstorm WarningGLDCheyenne17 min
Aug 9, 5:28 PM CDTSevere Thunderstorm WarningLBFCherry62 min
Aug 9, 5:34 PM CDTSevere Thunderstorm WarningGLDGreeley, Logan, Wallace, Wichita37 min
Aug 9, 5:38 PM CDTSevere Thunderstorm WarningLBFBlaine, Custer, Logan, Thomas52 min
Aug 9, 5:44 PM CDTSevere Thunderstorm WarningLBFArthur, Grant, Hooker, McPherson61 min
Aug 9, 6:05 PM CDTTornado WarningLBFCuster, Lincoln, Logan25 min
Aug 9, 6:09 PM CDTSevere Thunderstorm WarningLBFLincoln, Logan, McPherson66 min
Aug 9, 6:17 PM CDTSevere Thunderstorm WarningGLDLogan, Rawlins, Sherman, Thomas, Wallace58 min
Aug 9, 6:25 PM CDTSevere Thunderstorm WarningLBFArthur, Keith, Lincoln, McPherson65 min
Aug 9, 6:29 PM CDTTornado WarningGLDLogan, Thomas31 min
Aug 9, 6:30 PM CDTSevere Thunderstorm WarningLBFCuster45 min
Aug 9, 6:30 PM CDTSevere Thunderstorm WarningLBFCherry60 min
Aug 9, 6:38 PM CDTSevere Thunderstorm WarningGLDLogan, Wichita67 min
Aug 9, 6:43 PM CDTSevere Thunderstorm WarningGLDGove, Logan, Sheridan, Thomas62 min
Aug 9, 6:46 PM CDTSevere Thunderstorm WarningGIDFranklin, Webster29 min
Aug 9, 7:02 PM CDTSevere Thunderstorm WarningGIDDawson43 min
Aug 9, 7:07 PM CDTSevere Thunderstorm WarningLBFCuster, Lincoln38 min
Aug 9, 7:14 PM CDTSevere Thunderstorm WarningGIDFranklin, Webster46 min
Aug 9, 7:28 PM CDTSevere Thunderstorm WarningLBFKeith, Lincoln62 min
Aug 9, 7:32 PM CDTFlash Flood WarningGIDFranklin3 hr
Aug 9, 7:37 PM CDTSevere Thunderstorm WarningGIDSmith38 min
Aug 9, 7:44 PM CDTSevere Thunderstorm WarningGIDBuffalo, Dawson46 min
Aug 9, 7:44 PM CDTSevere Thunderstorm WarningLBFCuster26 min
Aug 9, 7:59 PM CDTSevere Thunderstorm WarningLBFArthur, Garden, Grant46 min
Aug 9, 8:09 PM CDTSevere Thunderstorm WarningGIDGosper, Phelps66 min
Aug 9, 8:13 PM CDTSevere Thunderstorm WarningGIDJewell, Smith47 min
Aug 9, 8:28 PM CDTSevere Thunderstorm WarningGIDSmith21 min
Aug 9, 8:28 PM CDTSevere Thunderstorm WarningGIDBuffalo, Dawson47 min
Aug 9, 8:28 PM CDTSevere Thunderstorm WarningLBFLincoln46 min
Aug 9, 8:44 PM CDTSevere Thunderstorm WarningGIDJewell46 min
Aug 9, 8:44 PM CDTSevere Thunderstorm WarningLBFLincoln, Perkins61 min
Aug 9, 9:01 PM CDTSevere Thunderstorm WarningGIDMitchell44 min
Aug 9, 9:09 PM CDTSevere Thunderstorm WarningGIDKearney, Phelps27 min
Aug 9, 9:28 PM CDTSevere Thunderstorm WarningGIDJewell47 min
Aug 9, 9:30 PM CDTSevere Thunderstorm WarningGIDKearney, Phelps30 min
Aug 9, 9:32 PM CDTSevere Thunderstorm WarningGIDMitchell43 min
Aug 9, 9:33 PM CDTSevere Thunderstorm WarningGIDBuffalo, Hall, Sherman42 min
Aug 9, 9:49 PM CDTSevere Thunderstorm WarningGIDMitchell26 min
Aug 9, 9:51 PM CDTFlash Flood WarningGIDMitchell3 hr
Aug 9, 10:09 PM CDTSevere Thunderstorm WarningGIDOsborne, Smith25 min
Aug 9, 10:18 PM CDTSevere Thunderstorm WarningGIDAdams, Buffalo, Clay, Hall, Hamilton, Kearney and 1 more42 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, 8.1 hours before the alert went out and 11 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 2014-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 996 joules per kilogram.LCLLFCEL10008507005003002001001 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 2014-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 249 square meters per square second.1939Sfc1 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
996 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
249 m²/s²
0-3 km storm-relative helicity
314 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 8, 11:48 PM CDTMesoscale DiscussionSPCJewell, Norton, Phillips, Republic, Smith87 min
Aug 9, 2:46 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Graham, Greeley, Lane and 12 more119 min
Aug 9, 5:32 PM CDTMesoscale DiscussionSPCChase, Clay, Cloud, Dickinson, Ellsworth, Geary and 8 more88 min
Aug 9, 5:57 PM CDTMesoscale DiscussionSPCClark, Edwards, Finney, Ford, Grant, Gray and 16 more63 min
Aug 9, 6:40 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Graham, Jewell, Mitchell, Norton and 8 more95 min
Aug 9, 6:52 PM CDTSevere Thunderstorm WatchSPCBarton, Edwards, Ellis, Ellsworth, Finney, Ford and 22 more6 hr
Aug 8, 7:48 PM CDTSevere Thunderstorm WatchSPCArthur, Blaine, Buffalo, Chase, Custer, Dawson and 22 more5 hr
Aug 8, 9:26 PM CDTMesoscale DiscussionSPCAntelope, Boone, Buffalo, Custer, Dawson, Frontier and 16 more94 min
Aug 9, 5:08 PM CDTMesoscale DiscussionSPCBanner, Box Butte, Cheyenne, Dawes, Garden, Morrill and 3 more67 min

Nearby

Severe Thunderstorm Watches in Nebraska, 2014Severe Thunderstorm Watches in Kansas, 2014Every severe thunderstorm watch in 2014

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.