Alert archive / South Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 137, NWS Rapid City, SD

July 4, 2000Butte County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 4, 2000, 7:02 PM MDT for Butte 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 4, 2000, 7:02 PM MDT (01:02 UTC)
Expired: Jul 4, 2000, 8:00 PM MDT
In force: 58 min
Issued by: NWS Rapid City, SD
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Butte County, SD

The radar

The Rapid City radar (KUDX), 102 km from the middle of the area, began a volume at 01:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 4, 7:53 PM MDT	Hail 1.75	Castle Rock, 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

Rapid City, SD (KUNR), launched 00:00Z, 1.0 hours before the alert went out and 105 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: 1724 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1327 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 13.3

Open this sounding in Storm Lab

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 Jul 4, 1:30 PM MDT, 5 hours 32 minutes earlier.

Area forecast discussion, Jul 4, 1:30 PM MDT, 5 hours 32 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
130 PM MDT TUE JUL 4 2000

CURRENT SURFACE MAP SHOWS TROF OVER EASTERN PART OF CWA. A FEW
THUNDERSTORMS HAVE TRIED TO DEVELOP ALONG TROF...AND OVER BLACK
HILLS...BY SMALL CAP HOLDING THINGS BACK AT THE MOMENT. WEAK
SHORTWAVE LIFTING THROUGH SOUTHEAST WYOMING ON TRACK TO MOVE INTO
SOUTHERN PART OF CWA NEXT FEW HOURS. WITH CONVERGANCE ALONG TROF AND
APPROACHING SHORTWAVE...EXPECTED THUNDERSTORMS TO GET GOING THIS
AFTERNOON. 12Z ETA SHOWS UPPER LEVEL DIVERGANCE INCREASING OVER THIS
AREA BY 00Z. THUNDERSTORMS WILL MOVE EAST-SOUTHEAST OUT OF CWA THIS
EVENING. ANOTHER MCS FORECAST TO MOVE ACROSS MONTANA INTO NORTH
DAKOTA...AND BY BRUSH FAR NORTHWEST.

FOR WEDNESDAY...WINDS TURN SOUTHELY ACROSS THE CWA...WITH UNSTABLE
AIRMASS STILL IN PLACE. AGAIN...MODELS INDICATING AN MCS TO MOVE
ACROSS MONTANA INTO NORTH DAKOTA...AND OVER SOUTH CENTRAL SOUTH
DAKOTA.

BY THURSDAY...MID LEVEL TEMPERTURES WARM 3-5C...WITH 700MB
TEMPERATURE GREATER THAN 16C OVER NORTHEAST WYOMING/SOUTHWEST SOUTH
DAKOTA. BEST CHANCE OF THUNDERSTORMS WILL BE OVER NORTHWEST. STILL
LEFT ISOLATED POPS IN FOR THURSDAY ACROSS SOUTHWEST...AS UPPER LEVEL
JET SHIFTS SOUTH OVER THE AREA.

IN THE EXTENDED...HOT TEMPERATURES IN STORE AS UPPER LEVEL RIDGE
TAKES HOLD OVER THE AREA AND MID LEVEL TEMPERATURES REMAIN VERY WARM.

p.UNR...NONE.
KC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:57 PM MDT	Severe Thunderstorm Warning	UNR	Butte	48 min
Jul 4, 8:30 PM MDT	Severe Thunderstorm Warning	UNR	Meade	60 min
Jul 4, 8:38 PM MDT	Tornado Warning	UNR	Meade	22 min
Jul 4, 8:58 PM MDT	Tornado Warning	UNR	Meade	32 min
Jul 4, 9:28 PM MDT	Severe Thunderstorm Warning	UNR	Meade	17 min
Jul 4, 9:38 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Ziebach	67 min
Jul 5, 3:10 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence	50 min
Jul 5, 3:58 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence	47 min
Jul 5, 4:43 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence	47 min
Jul 4, 6:35 PM MDT	Severe Thunderstorm Warning	UNR	Crook	40 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2000 Every severe thunderstorm warning in 2000

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; radar from the NEXRAD Level II archive.