Alert archive / South Dakota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 97, NWS Aberdeen, SD

July 13, 1998Dewey County, Stanley County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 13, 1998, 6:42 PM MDT for Dewey County, Stanley County, South Dakota. It was in force for 63 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 13, 1998, 6:42 PM MDT (00:42 UTC)
Expired: Jul 13, 1998, 7:45 PM MDT
In force: 63 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

Counties Dewey County, SD, Stanley County, SD

The radar

The Rapid City radar (KUDX), 177 km from the middle of the area, began a volume at 00:42 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, 0.7 hours before the alert went out and 183 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: 3006 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1841 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 9.3

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 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 13, 8:35 AM MDT, 10 hours 7 minutes earlier.

Area forecast discussion, Jul 13, 8:35 AM MDT, 10 hours 7 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
935 AM CDT MON JUL 13 1998

THE CURRENT FORECAST HAS A GOOD HANDLE ON THE CURRENT SITUATION. A STRONG
CAP EXISTED ACROSS THE AREA. THIS SHOULD KEEP CLOUDS FROM DEVELOPING.
ALSO...SOUTHWEST WINDS SHOULD ALLOW THE ATMOSPHERE TO BECOME WELL
MIXED. OVERALL...SEE NO PROBLEMS WITH THE CURRENT FORECAST.

.ABR...rNONE.

CB

In the hours before

Local storm report, Jul 13, 5:39 PM MDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
639 PM CDT MON JUL 13 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0617 PM     GREEN GRASS               SD   0.75 INCH HAIL
07/13/98   DEWEY

END

Local storm report, Jul 13, 5:39 PM MDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
639 PM CDT MON JUL 13 1998

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0617 PM     GREEN GRASS               SD   0.75 INCH HAIL
07/13/98   DEWEY

END

Local storm report, Jul 13, 6:21 PM MDT, 21 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 14, 5:42 PM MDT	Severe Thunderstorm Warning	ABR	Traverse	48 min
Jul 14, 5:55 PM MDT	Severe Thunderstorm Warning	ABR	Big Stone	65 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1998 Every severe thunderstorm warning in 1998

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.