Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 159, NWS Aberdeen, SD

July 25, 1997Campbell County, McPherson County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 25, 1997, 4:37 PM CDT for Campbell County, McPherson County, South Dakota. It was in force for 58 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 25, 1997, 4:37 PM CDT (21:37 UTC)
Expired: Jul 25, 1997, 5:35 PM CDT
In force: 58 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Campbell County, SD, McPherson County, SD

The radar

The Aberdeen radar (KABR), 101 km from the middle of the area, began a volume at 21:38 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 12:00Z, 9.6 hours before the alert went out and 137 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: 764 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 926 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

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.

NWS Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 25, 10:40 AM CDT, 5 hours 57 minutes earlier.

Area forecast discussion, Jul 25, 10:40 AM CDT, 5 hours 57 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1040 AM CDT FRI JUL 25 1997

HAVE UPDATED ZONE PACKAGE TO REMOVE MORNING WEATHER. ALSO UPPED HIGHS
IN CENTRAL ZONES AROUND PIR. WEAK PRESSURE GRADIENTS AT SFC UP TO 850 MB
...SO WILL FCST VARIABLE WINDS OVER ENTIRE CWA.

.ABR...NONE

MIDDLEBROOKE

In the hours before

Special weather statement, Jul 25, 11:30 AM CDT, 5 hours 7 minutes before

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Special weather statement, Jul 25, 11:34 AM CDT, 5 hours 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 8:36 PM CDT	Severe Thunderstorm Warning	ABR	Jones	64 min
Jul 24, 9:07 PM CDT	Severe Thunderstorm Warning	ABR	Clark, Spink	63 min
Jul 24, 9:45 PM CDT	Tornado Warning	ABR	Clark	30 min
Jul 24, 9:51 PM CDT	Severe Thunderstorm Warning	ABR	Codington, Hamlin	94 min
Jul 24, 11:21 PM CDT	Severe Thunderstorm Warning	ABR	Lyman	34 min
Jul 25, 12:07 AM CDT	Severe Thunderstorm Warning	ABR	Hamlin	48 min
Jul 25, 12:14 AM CDT	Flash Flood Warning	ABR	Clark, Codington, Deuel, Hamlin	3 hr
Jul 25, 4:51 PM CDT	Tornado Warning	ABR	McPherson	44 min
Jul 25, 5:37 PM CDT	Tornado Warning	ABR	Edmunds, McPherson	58 min
Jul 25, 6:22 PM CDT	Severe Thunderstorm Warning	ABR	Corson	63 min
Jul 25, 6:36 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	64 min
Jul 25, 6:45 PM CDT	Tornado Warning	ABR	Edmunds	50 min
Jul 25, 6:56 PM CDT	Tornado Warning	ABR	Brown	34 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1997 Every severe thunderstorm 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.