Alert archive / South Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 113, NWS Rapid City, SD

July 3, 2001Fall River County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 3, 2001, 7:01 PM MDT for Fall River County, South Dakota. It was in force for 59 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 3, 2001, 7:01 PM MDT (01:01 UTC)
Expired: Jul 3, 2001, 8:00 PM MDT
In force: 59 min
Issued by: NWS Rapid City, SD
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Fall River County, SD

The radar

The Rapid City radar (KUDX), 113 km from the middle of the area, began a volume at 01:02 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 3, 7:20 PM MDT	Hail 0.75	Burdock, 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 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: 982 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 2395 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.5

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 3, 2:46 PM MDT, 4 hours 15 minutes earlier.

Area forecast discussion, Jul 3, 2:46 PM MDT, 4 hours 15 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
246 PM MDT TUE JUL 3 2001

ACC OVER SW SD EARLY THIS MORNING...WITH ISOLATED TSRA DEVELOPING
FROM TIME TO TIME. THIS IS ASSOCIATED WITH THE WEAK VORT CENTER
HEADING SWRD OVER WRN SD. MAY SEE A FEW MORE STORMS BEFORE THE VORT
MOVES OUT AROUND SUNRISE...SO WILL HAVE TO KEEP AN EYE OUT FOR FURTHER
DEVELOPMENT.

SFC HIGH CONTINUES TO BUILD SOUTHWARD INTO THE CENTRAL DAKOTAS
TODAY...WITH SOUTHEASTERLY UPSLOPE WINDS TO THE WEST OF THE HIGH
AXIS ACROSS WRN SD AND ERN WY. SHORTWAVE CURRENTLY ROTATING OVER
IDAHO WILL REACH ERN WYOMING THIS AFTN. STRONG THETA-E ADVECTION AT
BOTH THE SFC AND 700MB WILL ADD TO THE INSTABILITY OVER NE WY AND
SWRN SD THIS AFTN AND EVENING. CAPE RISES TO 1000 TO 2000 J/KG OVER
THAT AREA THIS AFTN BEFORE THE SHORTWAVE CROSSES THE AREA AND BREAKS
THE CAP. CONVECTION MAY SHIFT EASTWARD INTO SC SD TONIGHT AS STRONG
700MB THETA-E ADVECTION CONTINUES AHEAD OF THE SHORTWAVE.

THURSDAY WILL BE MOSTLY SUNNY AND WARMER AS THE UPPER RIDGE AXIS
SHIFTS EAST. GOOD CAP OVER THE AREA WILL WORK TO INHIBIT CONVECTION
OVER SOUTH DAKOTA FOR MOST OF THE DAY...BUT THE NEXT SHORTWAVE
ROUNDING THE RIDGE WILL BREAK THE CAPE OVER NE WY DURING THE AFTN
AND WRN SD DURING THE EVENING. THIS SHORTWAVE DRAGS A SFC
TROUGH/COLD FRONT ACROSS WRN SD THURSDAY NIGHT...WHICH WILL HELP TO
RELEASE THE ENERGY STORED UNDER THE CAP OVER OUR ERN ZONES.
THEREFORE...HAVE INCLUDED LOW POP THUNDESTORMS IN ALL ZONES ON
THURSDAY NIGHT...WITH SLIGHTLY HIGHER POPS OVER NORTHWESTERN SOUTH
DAKOTA WHICH WILL BE CLOSER TO THE VIGOROUS VORT CENTER CROSSING
NORTH DAKOTA.

DIRTY WESTERLY FLOW CONTINUES THROUGH THE EXTENDED PERIODS...KEEPING
A DAILY CHANCE OF THUNDERSTORMS AND SEASONABLE TEMPERATURES.

.UNR...NONE.
RICHARDS

In the hours before

Local storm report, Jul 3, 1:35 PM MDT, 5 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION FOR TIME
NATIONAL WEATHER SERVICE RAPID CITY SD
1148 AM MDT TUE JUL 03 2001

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

1000 PM    2 SSW KEYAPAHA            SD   1 INCH HAIL
07/02/01   TRIPP                          REPORTED BY STORM
                                          SPOTTER.

Local storm report, Jul 3, 5:12 PM MDT, 1 hour 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
512 PM MDT TUE JUL 03 2001

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

0425 PM    2 S LEMMON                SD   FUNNEL CLOUD
07/03/01   PERKINS                        REPORTED BY PUBLIC.

0425 PM    LEMMON                    SD   .75 INCH HAIL
07/03/01   PERKINS                        REPORTED BY MEDIA.

0452 PM    5 NE MOORCROFT            WY   .75 INCH HAIL
07/03/01   CROOK                          REPORTED BY PUBLIC.

0457 PM    5 NE MOORCROFT            WY   .75 INCH HAIL
07/03/01   CROOK                          REPORTED BY PUBLIC.

Local storm report, Jul 3, 6:40 PM MDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
640 PM MDT TUE JUL 03 2001

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

0525 PM    8 E GLAD VLY              SD   .88 INCH HAIL
07/03/01   ZIEBACH                        REPORTED BY PUBLIC.
                                          LASTED 15 MINUTES.

0532 PM    UPTON                     WY   .75 INCH HAIL
07/03/01   WESTON                         REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0545 PM    6 W MOORCROFT             WY   1 INCH HAIL
07/03/01   CROOK                          REPORTED BY COOPERATIVE
                                          OBSERVER.

0550 PM    OSAGE                     WY   1 INCH HAIL
07/03/01   WESTON                         REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

0622 PM    16 ESE DUPREE             SD   1 INCH HAIL
07/03/01   ZIEBACH                        REPORTED BY STORM
                                          SPOTTER.

0622 PM    7 SE DUPREE               SD   2.5 INCH HAIL
07/03/01   ZIEBACH                        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
Jul 3, 6:00 PM MDT	Severe Thunderstorm Warning	UNR	Ziebach	60 min
Jul 3, 6:50 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Pennington	55 min
Jul 3, 6:53 PM MDT	Severe Thunderstorm Warning	UNR	Haakon	37 min
Jul 3, 6:30 PM MDT	Severe Thunderstorm Warning	UNR	Weston	30 min
Jul 4, 4:57 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	63 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2001 Every 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; radar from the NEXRAD Level II archive.