Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 87, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jul 26, 2002, 6:17 PM MDT for Pennington County, South Dakota. It was in force for 58 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 26, 2002, 6:17 PM MDT (00:17 UTC)
- Expired
- Jul 26, 2002, 7:15 PM MDT
- In force
- 58 min
- Issued by
- NWS Rapid City, SD
- Area
- Counties, with a storm outline in the text
County Pennington County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 26, 6:30 PM MDT | Hail 0.75 | Silver City, SD |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 349 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
- 579 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 2422 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 26, 2:50 PM MDT, 3 hours 27 minutes earlier.
Area forecast discussion, Jul 26, 2:50 PM MDT, 3 hours 27 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 250 PM MDT FRI JUL 26 2002 FORECAST CHALLENGES TODAY ARE TEMPS AND COVERAGE OF PCPN OVER NEXT COUPLE OF DAYS. NEAR ZONAL FLOW OVER N CONUS CONTINUES TO BRING QUICK MOVING SHRTWVS ACROSS THE REGION. ONE NOW MOVING INTO E SD WHILE THE NEXT ONE BEHIND IT IS OVER S MT AND N WY. MODELS IN PRETTY GOOD AGREEMENT...BUT WILL GENERALLY FOLLOW ETA THRU THE SHORT TERM. WENT A FEW DEGREES ABOVE ALL GUIDANCE FOR HIGH TEMPS FOR SAT AND SUN. FOR TONIGHT...WIDELY SCT STORMS EXPECTED AS WAVE MOVES EASTWARD INTO THE DAKOTAS. BEST CHANCES WILL BE ACROSS NORTHERN AND WESTERN ZONES. SVR WX POTENTIAL LOOKS MINIMAL...BUT A STRONG STORM OR TWO IS POSSIBLE...ESPECIALLY NE WY AND NW SD. THOUGH SOME DRIER AIR HAS MOVED INTO NE WY THIS AFT...STORMS THAT MOVE ACROSS ARE EXPECTED TO BE ACCOMPANIED BY SOME RAINFALL...SO THE CONCERN FOR DRY LIGHTNING WILL BE MINIMIZED. THEREFORE...FIRE WX WATCH FOR NE WY AND THE HILLS HAS BEEN CANCELLED. TOMORROW WILL REMAIN WARM AHEAD OF AN APPROACHING COLD FRONT. IT WILL BECOME BREEZY AT TIMES IN THE AFT...ESPECIALLY ACROSS NW SD. COLD FRONT IS EXPECTED TO REACH NORTHERN ZONES AROUND 00Z AND WORK ITS WAY SOUTHWARD OVERNIGHT. COMBINED WITH ANOTHER SHRTWV MOVING THRU...THIS SHOULD BE THE FOCUS FOR SCT SHOWERS AND STORMS. SUN AND MON WILL BE COOLER WITH HIGH TEMPS IN THE 80S AND LOW HUMIDITIES. LONG RANGE MODELS CONTINUE TO BUILD UPPER HIGH OVER THE SW CONUS EARLY NEXT WEEK. SO TEMPS WILL WARM UP AGAIN...WITH HIGHS BACK INTO THE 90S FOR THE REMAINDER OF THE WEEK. .UNR...NONE ST
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 6:03 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 57 min |
| Jul 26, 6:05 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 40 min |
| Jul 26, 6:11 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 64 min |
| Jul 26, 7:53 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 37 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.