Alert archive / South Dakota / Flash Flood Warnings in 1996

Flash Flood Warning 4, NWS Aberdeen, SD

August 19, 1996Campbell County, Walworth County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Aug 19, 1996, 1:33 AM CDT for Campbell County, Walworth County, South Dakota. It was in force for 62 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 19, 1996, 1:33 AM CDT (06:33 UTC)
Expired
Aug 19, 1996, 2:35 AM CDT
In force
62 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

Counties Campbell County, SD, Walworth County, SD

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 6.6 hours before the alert went out and 140 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1996-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1306 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 1996-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1306 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1626 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

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 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, Aug 18, 8:11 PM CDT, 5 hours 22 minutes before
SDZ003-004-009-015-016-033>037-045-048-051-190215-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ABERDEEN SD
810 PM CDT (710 PM MDT) SUN AUG 18 1996

...NO SEVERE THUNDERSTORMS ARE EXPECTED THROUGH THE NIGHTTIME
HOURS...

THUNDERSTORMS ARE EXPECTED TO PERSIST THROUGH PORTIONS OF CENTRAL
AND NORTH CENTRAL SOUTH DAKOTA THROUGHOUT THE EVENING AND OVERNIGHT
HOURS. WHILE SOME THUNDERSTORMS MAY CONTAIN VERY HEAVY RAINFALL AND
SOME SMALL HAIL...THESE2 STORMS ARE NOT EXPECTED TO BECOME SEVERE.

SMALL HAIL AND RAINFALL AMOUNTS OF UP TO AN INCH FELL IN CENTRAL
CORSON COUNTY WHEN THUNDERSTORMS MOVED THROUGH THE AREA EARLIER THIS
EVENING.

OLSON

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 1:33 AM CDTSevere Thunderstorm WarningABRCampbell, Walworth62 min

Nearby

Flash Flood Warnings in South Dakota, 1996Every 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.