Alert archive / South Dakota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 5, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at May 1, 2001, 3:04 AM MDT for Lawrence County, South Dakota. It was in force for 56 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
- May 1, 2001, 3:04 AM MDT (09:04 UTC)
- Expired
- May 1, 2001, 4:00 AM MDT
- In force
- 56 min
- Issued by
- NWS Rapid City, SD
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Lawrence County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 1, 3:30 AM MDT | Thunderstorm Wind 60 E | Deadwood, 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
Riverton, WY (KRIW), launched 00:00Z, 9.1 hours before the alert went out and 397 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2788 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 1, 2:45 AM MDT, 19 minutes earlier.
Area forecast discussion, May 1, 2:45 AM MDT, 19 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 245 AM MDT TUE MAY 1 2001 IMMEDIATE PROBLEM SVR WX IN FAR WRN PTN OF THE CWA. WND SPD TREND IS DOWN WITH SHR RECORDING 60 KTS...GCC RECORDING 52 KTS AND 2WX RECORDING 48 KTS. FEEL CONVECTION IS WEAKENING AND WNDS DECREASING AS CD POOL SPREADS OUT...NOT JUST AN ILLUSION OF THE RADAR HOLE. WILL WORD -SHRA ENDING N EARLY. OTHERWISE...MDLS AGREE WITH PRETTY GOOD WNDS TODAY BEHIND CD FNT. LLVL AGEO AND GEO WINDS OPPOSE EACH OTHER...SO NOT CONCERNED ABOUT WARNING CRITERIA WNDS...BUT WILL GO WITH ADVY ALONG AND N OF I90 IN SD TODAY. AFTER THAT...MAIN PROBLEM WILL BE WK -SHRA IN RATHER CD UNSTABLE AIR. CAPES LOOK WK...BUT DEEP ENOUGH TO SUPPORT -SHRA WITH AN ISOLATED --TSRA OVER THE BLK HLS THIS AFTERNOON AND SOUTH WED AFTERNOON AND EVE. WILL GO GENERALLY WITH GUIDANCE TEMPS AS THEY LOOK REASONABLE. AT 60 HRS ETA DOESN'T e HAVE SW US LOW CLOSED...BUT WITHOUT AN UPSTREAM KICKER...WOULDN'T BE SURPRISED IF AVN IS CORRECT IN CLOSING IT OFF...MEANING WEEKEND WILL LIKELY BE WET AS THE WAVE MEANDERS INTO PLAINS. .UNR...NONE. BAILEY
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 2:51 AM MDT | Severe Thunderstorm Warning | UNR | Butte, Harding | 54 min |
| May 1, 3:22 AM MDT | Severe Thunderstorm Warning | UNR | Meade, Perkins | 68 min |
| May 1, 3:42 AM MDT | Severe Thunderstorm Warning | UNR | Pennington | 63 min |
| May 1, 1:45 AM MDT | Severe Thunderstorm Warning | UNR | Campbell | 60 min |
| May 1, 1:50 AM MDT | Severe Thunderstorm Warning | UNR | Crook | 40 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.