Alert archive / South Dakota / Flash Flood Warnings in 1996

Flash Flood Warning 2, NWS Aberdeen, SD

July 17, 1996Day County, Roberts County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Jul 17, 1996, 8:40 PM CDT for Day County, Roberts County, South Dakota. It was in force for 50 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: Jul 17, 1996, 8:40 PM CDT (01:40 UTC)
Expired: Jul 17, 1996, 9:30 PM CDT
In force: 50 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Day County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 89 km from the middle of the area, began a volume at 01:41 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.7 hours before the alert went out and 110 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: 4029 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1079 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 17.8

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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 17, 3:42 PM CDT, 4 hours 58 minutes before

SDZ003>005-009-010-015>017-033>037-045-048-051-180250-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
343 PM CDT (243 PM MDT) WED JUL 17 1996

...TORNADO WATCH IN EFFECT FOR CENTRAL AND PARTS OF NORTHEAST SOUTH
DAKOTA UNTIL 10 PM CDT...

A TORNADO WATCH IS IN EFFECT FOR MUCH OF CENTRAL AND PARTS OF
NORTHEAST SOUTH DAKOTA.  THIS MEANS THAT SEVERE THUNDERSTORMS AND
EVEN TORNADOES WILL BE A POSSIBILITY IN THE WATCH AREA THROUGH 10
PM.  THE WATCH AREA GENERALLY STRETCHES OVER AN AREA FROM MOBRIDGE
SOUTH TO PIERRE AND EAST TO JUST WEST OF BROWN AND SPINK COUNTY.

EVEN YOU ARE IN THE WATCH AREA PLEASE STAY CLOSE TO A RADIO OR TV IN
CASE WARNINGS ARE ISSUED.

TDK

Local storm report, Jul 17, 4:52 PM CDT, 3 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
455 PM CDT WED JUL 17 1996

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

0442 PM      2 N ISABEL             SD      1.75 HAIL
07/17/96     DEWEY

TDK

Local storm report, Jul 17, 5:05 PM CDT, 3 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
507 PM CDT WED JUL 17 1996

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

0410 PM      8 NE GLAD VALLEY        SD      .75 HAIL
07/17/96     CORSON

TDK

Local storm report, Jul 17, 7:53 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
753 PM CDT WED JUL 17 1996

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

0706 PM      4 NE GROTON             SD     1.00 HAIL
07/17/96     BROWN

0736 PM      6 E 1 N GROTON          SD     TORNADO
07/17/96     BROWN                          BRIEF TOUCHDOWN

0740 PM      15 E GROTON             SD     TORNADO
07/17/96     DAY                            BRIEF TOUCHDOWN

MGM

Local storm report, Jul 17, 7:57 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
755 PM CDT WED JUL 17 1996

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

0753 PM      PIERPONT                SD     TORNADO
07/17/96     DAY

TDK

Local storm report, Jul 17, 8:01 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
801 PM CDT WED JUL 17 1996

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

0800 PM      2 E PIERPONT            SD     TORNADO
07/17/96     DAY                            LARGE TORNADO

MGM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:24 PM CDT	Tornado Warning	ABR	Day	46 min
Jul 17, 7:54 PM CDT	Tornado Warning	ABR	Day	46 min
Jul 17, 8:25 PM CDT	Flash Flood Warning	ABR	Marshall	35 min
Jul 17, 8:25 PM CDT	Severe Thunderstorm Warning	ABR	Marshall	35 min
Jul 17, 8:40 PM CDT	Tornado Warning	ABR	Day, Roberts	50 min
Jul 17, 9:33 PM CDT	Severe Thunderstorm Warning	ABR	Day	47 min
Jul 17, 9:46 PM CDT	Severe Thunderstorm Warning	ABR	Clark	49 min
Jul 17, 10:14 PM CDT	Tornado Warning	ABR	Clark, Codington	31 min
Jul 17, 10:50 PM CDT	Tornado Warning	ABR	Codington	45 min

Nearby

Flash Flood Warnings in South Dakota, 1996 Every flash flood warning in 1996

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; radar from the NEXRAD Level II archive.