Alert archive / South Dakota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 95, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 13, 1998, 4:30 PM MDT for Dewey County, South Dakota. It was in force for 65 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 13, 1998, 4:30 PM MDT (22:30 UTC)
- Expired
- Jul 13, 1998, 5:35 PM MDT
- In force
- 65 min
- Issued by
- NWS Aberdeen, SD
- Area
- Whole counties
County Dewey County, SD
The radar
The Bismarck radar (KBIS), 180 km from the middle of the area, began a volume at 22:33 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 13, 4:56 PM MDT | Hail 1.75 | Lantry, SD | Dime to golfball size hail fell at Green Grass northeast of Lantry. |
| Jul 13, 5:17 PM MDT | Hail 0.75 | Lantry, SD |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.5 hours before the alert went out and 180 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.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -241 J/kg
- Mixed-layer LCL
- 2364 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, 7 hours 55 minutes earlier.
Area forecast discussion, Jul 13, 8:35 AM MDT, 7 hours 55 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
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 5:36 PM MDT | Severe Thunderstorm Warning | ABR | Dewey | 64 min |
| Jul 13, 5:51 PM MDT | Flash Flood Warning | ABR | Dewey | 6 hr |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1998Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.