Alert archive / Wyoming / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 55, NWS Rapid City, SD

July 8, 2002Crook County, Weston County, Wyoming

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 8, 2002, 5:39 PM MDT for Crook County, Weston County, Wyoming. It was in force for 66 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 8, 2002, 5:39 PM MDT (23:39 UTC)
Expired: Jul 8, 2002, 6:45 PM MDT
In force: 66 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

Counties Crook County, WY, Weston County, WY

What was reported inside it

Time	Report	Where	Remark
Jul 8, 6:03 PM MDT	Thunderstorm Wind 61 E	Upton, WY	Several 3-4 inch diameter tree branches were blown down.

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.

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 8, 2:30 PM MDT, 3 hours 9 minutes earlier.

Area forecast discussion, Jul 8, 2:30 PM MDT, 3 hours 9 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY
230 PM MDT MON JUL 08 2002

20Z SURFACE ANALYSIS HAD LOW OVER NORTH CENTRAL WY WITH WARM FRONT
LIFTING THROUGH THE ND/SD BORDER. 2-3MB/3HR PRESSURE FALLS NOTED
OVER NORTHEAST WY/SOUTHEAST MT/WESTERN SD SUPPORTING INCREASING
WINDS ACROSS THE CWA. NEGATIVELY TILTED TROUGH NOTED ON WATER VAPOUR
BLASTING INTO WESTERN MT...AND IS EXPECTED TO LIFT INTO SOUTH
CENTRAL CANADA OVERNIGHT. THUS...THE SURFACE LOW WILL MOVE INTO ND
OVERNIGHT DRAGGING A SHARP WIND SHIFT/COOL FRONT THROUGH THE WESTERN
2/3RDS OF THE CWA. THERMAL RIDGE AHEAD OF UPPER SYSTEM
IMPRESSIVE...SO CAP WILL TAKE SOME EFFORT TO BREAK. WE/RE THINKING
IT WILL BE HARD TO BREAK SOUTH OF I-90 OVERNIGHT. IF TSRA DO DEVELOP
NORTH OF I-90...SHEAR SUFFICIENT FOR SUPERCELLS/SEVERE TSRA. WILL
TIME FRONT THROUGH KRAP BY 12Z.

TUESDAY...COLD FRONT MOVES THROUGH REST OF CWA WITH LINGERING
POSSIBILITY OF TSRA ALONG IT. REFRESHING NORTHWEST WIND EXPECTED.
HIGHS WILL BE TRICKY WITH BEST 850-700MB COLD ADVECTION LAGGING
BEHIND 3-6HR. WILL GO NEAR GUIDANCE NORTHWEST AND A LITTLE ABOVE
SOUTHWEST. UPPER TROUGH WILL CLOSE OFF NEAR ND TUESDAY NIGHT. WE/LL
BE ON DRY SIDE SO HAVE TAKEN TSRA OUT OF FORECAST EXCEPT IN SOUTH
CENTRAL SD.

WEDNESDAY/THURSDAY...UPPER LOW SPINS SLOWLY SOUTHEAST THROUGH THE
DAKOTAS. HAVE CONFINED TSRA CHANCES TO BE DIURNALLY DRIVEN WEDNESDAY
AND NONE OF THURSDAY GIVEN SUBSIDENCE AND STRONG DRYING.

FRIDAY THROUGH MONDAY...UPPER RIDGE BUILDS OVER THE ROCKIES. WE STAY
ON THE PERIPHERY OF IT...BUT STILL EXPECT MANY READINGS ABOVE 90F.
WILL CONFINE MENTIONABLE TSRA TO MONDAY.

.UNR...NONE.

HELGESON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 5:15 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	30 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 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; verification from NCEI's Storm Data.