Alert archive / Nebraska / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 601

July 20, 20007 counties in Nebraska; Custer County, Fall River County, South Dakota; 6 counties in Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2000, 3:00 PM MDT for 7 counties in Nebraska; Custer County, Fall River County, South Dakota; 6 counties in Wyoming. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 20, 2000, 3:00 PM MDT (21:00 UTC)
Expired
Jul 20, 2000, 8:00 PM MDT
In force
5 hr
Issued by
the Storm Prediction Center

Counties Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Weston County, WY

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 20, 3:28 PM MDTSevere Thunderstorm WarningCYSNiobrara47 min
Jul 20, 3:28 PM MDTSevere Thunderstorm WarningCYSPlatte32 min
Jul 20, 4:10 PM MDTSevere Thunderstorm WarningCYSGoshen50 min
Jul 20, 4:51 PM MDTSevere Thunderstorm WarningUNRWeston39 min
Jul 20, 5:13 PM MDTSevere Thunderstorm WarningCYSBanner, Morrill47 min
Jul 20, 6:17 PM MDTSevere Thunderstorm WarningCYSLaramie, Platte43 min
Jul 20, 6:33 PM MDTSevere Thunderstorm WarningCYSPlatte42 min
Jul 20, 6:59 PM MDTSevere Thunderstorm WarningCYSLaramie46 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.0 hours before the alert went out and 212 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 2000-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 323 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 2000-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
323 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
480 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 7:00 PM MDTSevere Thunderstorm WatchSPCArthur, Blaine, Brown, Buffalo, Chase, Cherry and 27 more6 hr
Jul 20, 4:45 PM MDTTornado WatchSPCChase, Dawson, Dundy, Frontier, Furnas, Gosper and 6 more6 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2000Severe Thunderstorm Watches in Wyoming, 2000Severe Thunderstorm Watches in South Dakota, 2000Every severe thunderstorm watch in 2000

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.