Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 111, NWS Rapid City, SD

August 8, 2002Fall River County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Aug 8, 2002, 3:16 PM MDT for Fall River County, South Dakota. It was in force for 59 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: Aug 8, 2002, 3:16 PM MDT (21:16 UTC)
Expired: Aug 8, 2002, 4:15 PM MDT
In force: 59 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

County Fall River County, SD

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 8, 1:10 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.3 hours before the alert went out and 106 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 165 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1511 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 8, 1:55 PM MDT, 1 hour 21 minutes earlier.

Area forecast discussion, Aug 8, 1:55 PM MDT, 1 hour 21 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
155 PM MDT THU AUG 8 2002

...SEVERE THUNDERSTORM WATCH ENTIRE AREA EXCEPT CAMPBELL COUNTY
WYOMING THIS EVENING...
VIGOROUS PACIFIC SHORT WAVE MOVING INTO THE NORTHERN PLAINS THIS
AFTERNOON WILL CONTINUE TO PRODUCE INTENSE THUNDERSTORM ACTIVITY AS
IT MOVES OUT OF SOUTHERN MONTANA INTO NORTHEAST WYOMING AND WESTERN
SOUTH DAKOTA. FORECAST HODOGRAPHS INDICATE A PREFERENCE FOR LINEAR
ORGANIZATION...STRONG WINDS AND LARGE HAIL. THE WINDS ARE OF
PARTICULAR CONCERN FOR NWRN SD...N AND NE OF THE BLACK HILLS...SINCE
THE SHORT WAVE WILL CONTRIBUTE 50+ MPH WIND SPEEDS TO THE MID LEVELS
OF THE ATMOSPHERE ACROSS WRN SD BY MIDNIGHT.  SEVERE WEATHER
OPERATIONS IN PROGRESS AT UNR.

ONLY MINOR ADJUSTMENTS WERE MADE TO LATER PERIODS OF THE PACKAGE. A
SOMEWHAT UNSTABLE NW FLOW WILL KEEP THE WEATHER MODERATELY ACTIVE
THROUGH THE END OF THE WEEK...THEN LARGE SCALE SUBSIDENCE AND DRY
AIR WILL PROVIDE A RESPITE FROM MIDDAY SATURDAY THROUGH SUNDAY.
SUMMERTIME HEATING AND A WEAK MID LEVEL SHORT WAVE WILL PRODUCE SOME
WEATHER MON AND TUE...WITH FAIR SKIES DOMINATING WED AND THU.

.UNR...NONE.

CARPENTER

In the hours before

Local storm report, Aug 8, 11:31 AM MDT, 3 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
1131 AM MDT THU AUG 08 2002

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0945 PM    3 NW FAIRPT               SD   65 MPH TSTM GUST
08/07/02   MEADE                          REPORTED BY PUBLIC.

1000 PM    1 S REVA                  SD    MPH TSTM GUST
08/07/02   HARDING                        EVENT DURATION 30
                                          MINUTES. REPORTED BY
                                          STORM SPOTTER.

1003 PM    ZEONA                     SD   70 MPH TSTM GUST
08/07/02   PERKINS                        REPORTED BY PUBLIC.

1030 PM    PRAIRIE CITY              SD   60 MPH TSTM GUST
08/07/02   PERKINS                        REPORTED BY STORM
                                          SPOTTER.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 8:44 PM MDT	Severe Thunderstorm Warning	UNR	Harding	46 min
Aug 7, 9:39 PM MDT	Severe Thunderstorm Warning	UNR	Meade	51 min
Aug 7, 9:53 PM MDT	Severe Thunderstorm Warning	UNR	Harding, Perkins	67 min
Aug 8, 1:12 PM MDT	Severe Thunderstorm Warning	UNR	Todd	48 min
Aug 8, 2:09 PM MDT	Severe Thunderstorm Warning	UNR	Harding	66 min
Aug 8, 3:01 PM MDT	Severe Thunderstorm Warning	UNR	Perkins	59 min
Aug 8, 3:21 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence	54 min
Aug 8, 3:50 PM MDT	Severe Thunderstorm Warning	UNR	Butte	55 min
Aug 8, 4:00 PM MDT	Flash Flood Warning	UNR	Lawrence	4 hr
Aug 8, 4:11 PM MDT	Severe Thunderstorm Warning	UNR	Meade	64 min
Aug 8, 4:18 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	57 min
Aug 8, 5:15 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	60 min
Aug 8, 5:39 PM MDT	Severe Thunderstorm Warning	UNR	Perkins	51 min
Aug 8, 5:43 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Ziebach	47 min
Aug 7, 6:15 PM MDT	Severe Thunderstorm Warning	UNR	Weston	60 min
Aug 7, 6:20 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	40 min
Aug 7, 6:59 PM MDT	Severe Thunderstorm Warning	UNR	Crook	61 min
Aug 8, 2:27 PM MDT	Severe Thunderstorm Warning	UNR	Crook, Weston	48 min
Aug 8, 3:13 PM MDT	Severe Thunderstorm Warning	UNR	Crook	32 min
Aug 8, 3:17 PM MDT	Severe Thunderstorm Warning	UNR	Weston	43 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2002 Every 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; the sounding from the Mesonet's radiosonde archive.