Alert archive / South Dakota / Flash Flood Warnings in 1991

Flash Flood Warning 9, NWS Aberdeen, SD

June 19, 1991Codington County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Jun 19, 1991, 7:33 PM CDT for Codington County, South Dakota. It was in force for 117 min.

The area

The counties it named.

The facts

Issued
Jun 19, 1991, 7:33 PM CDT (00:33 UTC)
Expired
Jun 19, 1991, 9:30 PM CDT
In force
117 min
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Codington County, SD

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 0.6 hours before the alert went out and 283 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, Minneapolis, MN at 00:00Z on 1991-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Minneapolis, MN at 00:00Z on 1991-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1629 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
234 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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

Local storm report, Jun 19, 5:56 PM CDT, 1 hour 37 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 9:24 PM CDTSevere Thunderstorm WarningABRSpink66 min
Jun 19, 10:56 PM CDTFlash Flood WarningABRCodington2 hr
Jun 20, 12:41 AM CDTFlash Flood WarningABRMarshall, Roberts4 hr
Jun 20, 12:53 AM CDTSevere Thunderstorm WarningABRRoberts67 min
Jun 20, 12:53 AM CDTSevere Thunderstorm WarningABRMarshall37 min
Jun 20, 1:22 AM CDTSevere Thunderstorm WarningABRRoberts68 min
Jun 20, 6:34 PM CDTSevere Thunderstorm WarningABRKingsbury41 min

Nearby

Flash Flood Warnings in South Dakota, 1991Every flash flood warning in 1991

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.