Alert archive / South Dakota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 83, NWS Aberdeen, SD

July 7, 1990Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 7, 1990, 8:34 PM MDT for Dewey County, South Dakota. It was in force for 56 min.

The area

The counties it named.

The facts

Issued
Jul 7, 1990, 8:34 PM MDT (02:34 UTC)
Expired
Jul 7, 1990, 9:30 PM MDT
In force
56 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Dewey County, SD

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.6 hours before the alert went out and 180 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 1990-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1699 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 1990-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.1939587897Sfc1 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
1699 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1103 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
158 m²/s²
Significant tornado parameter
1.4
Supercell composite
8.6

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.

In the hours before

Special weather statement, Jul 7, 6:48 PM MDT, 1 hour 46 minutes before
SDZ003-010-080245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
747 PM CDT SAT JUL 7 1990

...THUNDERSTORM DEVELOPING IN NORTH CENTRAL SOUTH DAKOTA...

AT 743 PM CDT RADAR INDICATED THUNDERSTORMS IN NORTHCENTRAL SOUTH DAKOTA
FROM 50 MILES WEST NORTHWEST OF PIERRE SOUTH DAKOTA NORTHEAST TO 35 MILES
NORTHWEST OF MOBRIDGE SOUTH DAKOTA. MOVEMEAT OF THE THUNDERSTORMS WAS
EAST AT 25 MPH.

RESIDENTS OF NORTH CENTRAL SOUTH DAKOTA CAN EXPECT HEAVY RAINS AND
POSSIBLE SMALL HAIL ALONG WITH STRONG GUSTY WINDS WITH THE THUNDERSTORMS
AS THEY PASS. THE THUNDERSTORMS SHOULD BE EAST OF THE MISSOURI RIVER BY
10 PM CDT.
 GILLESPIE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 7:23 PM MDTSevere Thunderstorm WarningABRCorson11 min
Jul 7, 7:31 PM MDTSevere Thunderstorm WarningABRCampbell59 min
Jul 7, 7:35 PM MDTSevere Thunderstorm WarningABRDewey55 min
Jul 7, 7:59 PM MDTSevere Thunderstorm WarningABREdmunds, McPherson61 min
Jul 7, 8:42 PM MDTSevere Thunderstorm WarningABREdmunds63 min
Jul 7, 9:21 PM MDTSevere Thunderstorm WarningABRBrown58 min
Jul 7, 10:13 PM MDTSevere Thunderstorm WarningABRDay62 min
Jul 7, 10:13 PM MDTSevere Thunderstorm WarningABRMarshall52 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1990Every severe thunderstorm warning in 1990

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.