Alert archive / Wyoming / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 89, NWS Rapid City, SD

June 30, 2001Crook County, Wyoming

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 30, 2001, 5:04 AM MDT for Crook County, Wyoming. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 30, 2001, 5:04 AM MDT (11:04 UTC)
Expired
Jun 30, 2001, 5:45 AM MDT
In force
41 min
Issued by
NWS Rapid City, SD
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Crook County, WY

The radar

The Rapid City radar (KUDX), 148 km from the middle of the area, began a volume at 11:05 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.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 11.1 hours before the alert went out and 146 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 00:00Z on 2001-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 917 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 00:00Z on 2001-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
917 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
2203 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 2:45 AM MDT, 2 hours 19 minutes earlier.

Area forecast discussion, Jun 30, 2:45 AM MDT, 2 hours 19 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
245 AM MDT SAT JUN 30 2001

DISCUSSION DELAYED DUE TO ONGOING SEVERE WEATHER.

.UNR...NONE.

RICHARDS

The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 2:27 AM MDTSevere Thunderstorm WarningUNRButte, Lawrence58 min
Jun 30, 3:30 PM MDTSevere Thunderstorm WarningUNRPennington60 min
Jun 30, 4:29 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington61 min
Jun 30, 5:28 PM MDTSevere Thunderstorm WarningUNRCuster62 min
Jun 30, 12:57 AM MDTSevere Thunderstorm WarningUNRCrook63 min
Jun 30, 1:58 AM MDTSevere Thunderstorm WarningUNRCrook62 min
Jun 30, 2:11 AM MDTSevere Thunderstorm WarningUNRCampbell64 min
Jun 30, 2:45 AM MDTSevere Thunderstorm WarningUNRCrook60 min
Jun 30, 3:36 AM MDTSevere Thunderstorm WarningUNRCampbell54 min
Jun 30, 3:40 AM MDTFlash Flood WarningUNRCrook5 hr
Jun 30, 3:46 AM MDTSevere Thunderstorm WarningUNRCrook44 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2001Every severe thunderstorm warning in 2001

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.