Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 178, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Aug 29, 2002, 5:06 PM MDT for Fall River County, South Dakota. It was in force for 39 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
- Aug 29, 2002, 5:06 PM MDT (23:06 UTC)
- Expired
- Aug 29, 2002, 5:45 PM MDT
- In force
- 39 min
- Issued by
- NWS Rapid City, SD
- Area
- Counties, with a storm outline in the text
County Fall River County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 29, 5:40 PM MDT | Hail 0.75 | Edgemont, 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
Denver, CO (KDNR), launched 12:00Z, 11.1 hours before the alert went out and 375 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
- 55 J/kg
- Mixed-layer CIN
- -409 J/kg
- Mixed-layer LCL
- 1559 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- -7 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 Aug 29, 3:40 PM MDT, 1 hour 26 minutes earlier.
Area forecast discussion, Aug 29, 3:40 PM MDT, 1 hour 26 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
210 PM MDT THU AUG 29 2002
TSMS GOING WELL ACRS WY ATTM AND EXPECT THESE STORMS TO MAKE IT INTO
CWA BY 00Z AS STRONG S/W MOVES ACRS ROCKIES. GIVEN SUPERCELL MOTION
OF NEAR 0 KTS THRU EARLY EVE AND THE HIGH PRECIPITABLE WATER
VALUES...ISSUED A FLOOD WATCH FOR DEADWOOD AREA. WENT WITH LIKELY
POPS ACRS CWA WITH THIS SYSTEM. GD SHEAR AND INSTABILITY FCST ACRS
CWA AND WOULD NOT BE SURPRISED TO GET A TS WATCH IN THE NEXT FEW
HRS. ACTIVITY WL LIKELY LAST WELL PAST 06Z AS LL JET KICKS IN AND
KEEPS STORMS GOING ACRS PLNS.
FRI...SFC TROF WL PASS THRU WRN CWA BY 00Z AND BRING IN MUCH DRIER
AIR TO AREA. BEST CHC FOR STORMS WL BE E OF TROF THRU PLNS WHERE
MENTIONED CHC POPS. ALSO PUT IN SLT CHC ACRS W WHERE A COUPLE
STORMS MAY GET GOING EARLIER IN THE DAY. HIGHS TMRW WL BE GETTING
OVR 90 DEG ACRS THE PLNS WITH THERMAL RDG OVR WRN SD. MOS TEMPS LK A
LTL LO AND RAISED 3-5 DEG. FRI NIGHT...S/W RDG WL MOVE INTO WRN SD
WITH GD NVA FCST...SO WITH THE DRIER AIR AROUND EXPECT MOSTLY CLEAR
SKIES WITH LOWS IN THE MID 50S TO MID 60S.
SAT...ANOTHER DECENT S/W WL MOVE THRU AREA...NOT MUCH MOISTURE
AROUND...BUT SOME INSTABILITY. MAY HAVE SOME DRY TSMS WITH
INVERTED-V SOUNDING. INCLUDED 20 POPS THRU CWA. COLD FNT WL PASS
THRU SAT NIGHT AND BRING A BTR CHC FOR TSMS TO AREA...BUT BEST CHC
LKS TO BE JUST E OF FCST AREA WHERE BTR MOISTURE WL BE AVAILABLE.
BROAD TROF WL BE ACRS MUCH OF THE WRN 2/3RDS OF U.S. AND MDLS
SHOWING A COUPLE OF DISTURBANCES MVG THRU FA. INCLUDED CHC POPS ONCE
AGAIN ACRS AREA. TEMPS WL BE COOLER THAN FRI AND SAT WITH HIGHS
MAINLY IN THE LWR TO MID 80S.
ANOTHER CHC FOR STORMS LABOR DAY WITH ANOTHER S/W BEFORE RDG STARTS
TO BUILD IN FOR TUE AND WED. THIS WL BRING DRY CONDS TO AREA WITH
GRADUALLY WARMER TEMPS. NEXT CHC FOR STORMS LKS TO BE THU AS RDG
PASSES TO THE E.
.UNR...SEVERE THUNDERSTORM WATCH UNTIL 10 PM MDT FOR NE WY AND
EXTREME WRN SD.
FLOOD WATCH UNTIL 430 AM MDT FOR LAWRENCE COUNTY.
JMGThe office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 5:45 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 60 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.