Alert archive / Nebraska / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 551

June 20, 200314 counties in Nebraska; 8 counties in South Dakota; 7 counties in Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2003, 2:25 PM MDT for 14 counties in Nebraska; 8 counties in South Dakota; 7 counties in Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 20, 2003, 2:25 PM MDT (20:25 UTC)
Expired
Jun 20, 2003, 9:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
All 29 counties

Arthur County, NE, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Campbell County, WY, Crook County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 20, 2:53 PM MDTSevere Thunderstorm WarningCYSPlatte52 min
Jun 20, 3:39 PM MDTSevere Thunderstorm WarningCYSGoshen36 min
Jun 20, 5:02 PM MDTSevere Thunderstorm WarningLBFKeith58 min
Jun 20, 5:12 PM MDTSevere Thunderstorm WarningCYSCheyenne33 min
Jun 20, 5:19 PM MDTSevere Thunderstorm WarningCYSBox Butte26 min
Jun 20, 5:41 PM MDTSevere Thunderstorm WarningUNRCuster, Fall River49 min
Jun 20, 5:59 PM MDTSevere Thunderstorm WarningLBFKeith61 min
Jun 20, 6:16 PM MDTSevere Thunderstorm WarningLBFDeuel, Garden44 min
Jun 20, 6:28 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington47 min
Jun 20, 6:55 PM MDTSevere Thunderstorm WarningUNRMeade65 min
Jun 20, 6:57 PM MDTSevere Thunderstorm WarningLBFCherry, Sheridan63 min
Jun 20, 7:02 PM MDTSevere Thunderstorm WarningLBFGarden43 min
Jun 20, 7:12 PM MDTSevere Thunderstorm WarningLBFDeuel33 min
Jun 20, 7:17 PM MDTTornado WarningLBFGarden43 min
Jun 20, 7:22 PM MDTSevere Thunderstorm WarningLBFKeith, Perkins53 min
Jun 20, 7:32 PM MDTTornado WarningLBFGarden28 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

Rapid City, SD (KUNR), launched 12:00Z, 8.4 hours before the alert went out and 81 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, Rapid City, SD at 12:00Z on 2003-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Rapid City, SD at 12:00Z on 2003-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 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
2 J/kg
Mixed-layer CIN
-323 J/kg
Mixed-layer LCL
1161 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 1:41 PM MDTMesoscale DiscussionSPCBanner, Box Butte, Dawes, Kimball, Morrill, Scotts Bluff and 1 more2 hr
Jun 20, 4:12 PM MDTMesoscale DiscussionSPCChase, Dawson, Dundy, Frontier, Furnas, Gosper and 4 more63 min
Jun 20, 4:25 PM MDTTornado WatchSPCChase, Dundy, Frontier, Hayes, Hitchcock, Lincoln and 2 more6 hr
Jun 20, 5:45 PM MDTMesoscale DiscussionSPCArthur, Dawes, Deuel, Garden, Grant, Keith and 1 more60 min
Jun 20, 3:25 PM MDTMesoscale DiscussionSPCHarding65 min
Jun 20, 11:36 AM MDTMesoscale DiscussionSPCPark, Teton114 min
Jun 20, 12:17 PM MDTMesoscale DiscussionSPCFremont, Hot Springs, Lincoln, Sublette, Sweetwater, Uinta118 min

Nearby

Severe Thunderstorm Watches in Nebraska, 2003Severe Thunderstorm Watches in South Dakota, 2003Severe Thunderstorm Watches in Wyoming, 2003Every severe thunderstorm watch in 2003

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.