Alert archive / Wyoming / Tornado Warnings in 1998
Tornado Warning 12, NWS Rapid City, SD
NWS Rapid City, SD issued this tornado warning at Jun 22, 1998, 6:32 PM MDT for Crook County, Wyoming. It was in force for 48 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 22, 1998, 6:32 PM MDT (00:32 UTC)
- Expired
- Jun 22, 1998, 7:20 PM MDT
- In force
- 48 min
- Issued by
- NWS Rapid City, SD
- Area
- Whole counties
County Crook County, WY
The radar
The Rapid City radar (KUDX), 148 km from the middle of the area, began a volume at 00:33 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, 0.5 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.
- Mixed-layer CAPE
- 610 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 2011 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 575 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 18.5
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 tornado 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 tornado warning went out at Jun 22, 9:02 AM MDT, 9 hours 30 minutes earlier.
Area forecast discussion, Jun 22, 9:02 AM MDT, 9 hours 30 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 900 AM MDT MON JUNE 22 1998 MORNING FORECAST PACKAGE LOOKS ON TRACK AND SEE NO REASONS TO UPDATE. TEMPS ARE CLIMBING QUICKLY BUT CONVECTIVE TEMPERATURES ARE IN THE LOWER 70S. AIR MASS WILL MIX QUICKLY AND COVECTION SHOULD START FORMING CU BY 18Z AND EXPECT SCATTERED TSRA BY 20 TO 21Z...MOST PRONOUNCED OVER BLACK HILLS. SEVERE POTENTIAL LOOKS GOOD WITH 94O IN PLACE AND SLIGHT RISK AREA AS WELL. WILL ISSUE AN SPS AND MENTION MOST LIKELY THREAT TO BE HAIL AND STRONG WINDS AS LAPSE RATES STEEPEN. FORECAST SHEAR PROFILE AND HELICITY OF 256 OVER SOUTH CENTRAL WOULD SUPPORT POTENTIAL FOR AN ISOLATED TORNADO...BUT WILL NOT MENTION IN SPS. SPECI KUNR 221500Z 16013KT P6SM SKC 19/13 FEW AC DSNT SW-W .UNR...NONE. SEARLES
In the hours before
Local storm report, Jun 22, 5:17 PM MDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
517 PM MDT MON JUN 22 1998
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0450 PM WESTON WY 1 INCH HAIL
06/22/98 CAMPBELL
0450 PM WESTON WY 60 MPH TSTM GUST
06/22/98 CAMPBELL
0455 PM 10 NE WESTON WY 1.75 INCH HAIL
06/22/98 CAMPBELLLocal storm report, Jun 22, 5:17 PM MDT, 1 hour 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
517 PM MDT MON JUN 22 1998
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0450 PM WESTON WY 1 INCH HAIL
06/22/98 CAMPBELL
0450 PM WESTON WY 60 MPH TSTM GUST
06/22/98 CAMPBELL
0455 PM 10 NE WESTON WY 1.75 INCH HAIL
06/22/98 CAMPBELLThe office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 8:04 PM MDT | Tornado Warning | UNR | Butte, Lawrence | 46 min |
| Jun 23, 1:00 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 35 min |
| Jun 23, 1:41 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 19 min |
| Jun 23, 4:33 PM MDT | Severe Thunderstorm Warning | UNR | Jackson | 32 min |
| Jun 23, 4:38 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 32 min |
| Jun 23, 5:05 PM MDT | Severe Thunderstorm Warning | UNR | Jackson, Mellette | 50 min |
| Jun 23, 5:20 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 35 min |
| Jun 23, 5:52 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 48 min |
| Jun 23, 5:55 PM MDT | Severe Thunderstorm Warning | UNR | Mellette | 50 min |
| Jun 23, 5:57 PM MDT | Tornado Warning | UNR | Meade | 33 min |
| Jun 22, 6:46 PM MDT | Tornado Warning | UNR | Campbell | 49 min |
| Jun 22, 7:50 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 60 min |
| Jun 23, 4:44 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 36 min |
Nearby
Tornado Warnings in Wyoming, 1998Every tornado warning in 1998Tornadoes in 1998
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.