Alert archive / South Dakota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 122, NWS Aberdeen, SD

July 21, 1998Lyman County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 21, 1998, 2:12 AM CDT for Lyman County, South Dakota. It was in force for 48 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 21, 1998, 2:12 AM CDT (07:12 UTC)
Expired: Jul 21, 1998, 3:00 AM CDT
In force: 48 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Lyman County, SD

The radar

The Aberdeen radar (KABR), 207 km from the middle of the area, began a volume at 07:13 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 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 20, 10:07 AM CDT, 16 hours 5 minutes earlier.

Area forecast discussion, Jul 20, 10:07 AM CDT, 16 hours 5 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1007 AM CDT MON JUL 20 1998

STRONG TSRAS ACROSS FAR SE CLARK...HAMLIN AND DEUEL COUNTIES WILL BE
MOVING EAST OUT OF THE STATE BY NOON. OTHERWISE...A LOT OF HEAT AND
HUMIDITY FOR THIS AFTERNOON MAINLY FROM C INTO NE SD. TEMPS RISING INTO
THE 90S TO AROUND 100 AND DWPTS IN THE 70S. RHS WILL BE IN THE 45 TO 55
PERCENT RANGE WHICH SHOULD BRING HEAT INDICES AROUND 105 OR HIGHER. WILL
ISSUE A HEAT ADVISORY FOR C THROUGH NE SD FOR THIS AFTERNOON. HEAT
INDICES IN NC SD SHOULD BE LOWER WITH MOISTURE DECREASING AS WINDS
BECOME NW. BESIDES THE HOT AND HUMID CONDITIONS...THE 12Z RUC SHOWS A
SFC LOW MOVING ACROSS SOUTHERN CANADA WITH A TRAILING COLD FRONT MOVING
EAST ACROSS THE ABR CWA. CAPS ARE WEAK AND CAPES ARE HIGH...ESPECIALLY
FOR NE SD AND WC MN. SO CHANCE OF SEVERE TSRAS THIS AREA. LIKE SPCS
SLIGHT RISK AREA. WILL UPDATE ALL ZONES.

.ABR...HEAT ADVISORY...C THROUGH NE SD...THIS AFTERNOON.

MOHR

.ABR...NONE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 3:22 AM CDT	Severe Thunderstorm Warning	ABR	Hand, Hyde	63 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; radar from the NEXRAD Level II archive.