Alert archive / South Dakota / Flash Flood Warnings in 1997

Flash Flood Warning 2, NWS Aberdeen, SD

July 23, 1997Stanley County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Jul 23, 1997, 8:35 PM MDT for Stanley County, South Dakota. It was in force for 3 hr. 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 23, 1997, 8:35 PM MDT (02:35 UTC)
Expired
Jul 23, 1997, 11:40 PM MDT
In force
3 hr
Issued by
NWS Aberdeen, SD
Area
Whole counties

County Stanley County, SD

The radar

The Rapid City radar (KUDX), 170 km from the middle of the area, began a volume at 02:34 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

Rapid City, SD (KUNR), launched 00:00Z, 2.6 hours before the alert went out and 175 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, Rapid City, SD at 00:00Z on 1997-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1857 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, Rapid City, SD at 00:00Z on 1997-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 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
1857 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1603 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KABR 240245 COR
FFWABR
SDC117-240540-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
935 PM CDT (835 PM MDT) WED JUL 23 1997

* FLASH FLOOD WARNING FOR
  CENTRAL AND SOUTHERN STANLEY COUNTY - CENTRAL SOUTH DAKOTA

* UNTIL 1140 PM MDT (1240 AM CDT)

* SOME STREAMS AFFECTED
  COTTONWOOD CREEK
  PLUMB CREEK
  LANCE CREEK

* CAUSE AND EFFECT
  RADAR ESTIMATED 2 TO 3 INCHES OF RAINFALL SINCE 7 PM MDT.

DON'T CAMP NEAR STREAMS OR OTHER LOW AREAS SUBJECT TO FLOODING!

HARDING/BANN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 7:37 PM MDTSevere Thunderstorm WarningABRStanley48 min
Jul 23, 8:43 PM MDTSevere Thunderstorm WarningABRDewey62 min
Jul 23, 11:09 PM MDTSevere Thunderstorm WarningABRHughes46 min
Jul 23, 11:31 PM MDTSevere Thunderstorm WarningABRHyde, Sully64 min
Jul 23, 11:44 PM MDTFlash Flood WarningABRHughes, Stanley2 hr
Jul 23, 11:49 PM MDTSevere Thunderstorm WarningABRHand61 min
Jul 24, 12:32 AM MDTSevere Thunderstorm WarningABRSpink63 min

Nearby

Flash Flood Warnings in South Dakota, 1997Every flash flood warning in 1997

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.