Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 162, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 15, 1999, 2:12 PM MDT for Golden Valley County, North Dakota. It was in force for 63 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
- Aug 15, 1999, 2:12 PM MDT (20:12 UTC)
- Expired
- Aug 15, 1999, 3:15 PM MDT
- In force
- 63 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Golden Valley County, ND
The radar
The Bismarck radar (KBIS), 235 km from the middle of the area, began a volume at 20:14 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 |
|---|---|---|---|
| Aug 15, 2:30 PM MDT | Hail 1.75 | Beach, ND | Damage path of 15 miles wide and 20 miles long. |
| Aug 15, 2:45 PM MDT | Hail 1.75 | Sentinel Butte, ND | Automoble damage along interstate 94. |
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, 8.2 hours before the alert went out and 240 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
- 1866 J/kg
- Mixed-layer CIN
- -269 J/kg
- Mixed-layer LCL
- 690 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.8
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 Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 15, 1:00 AM MDT, 13 hours 12 minutes earlier.
Area forecast discussion, Aug 15, 1:00 AM MDT, 13 hours 12 minutes before
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Special weather statement, Aug 15, 2:10 PM MDT, 2 minutes before
NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-152100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 310 PM CDT SUN AUG 15 1999 ...SEVERE THUNDERSTORM WATCHES... THE SEVERE THUNDERSTORM WATCH THAT WAS TO BE IN EFFECT UNTIL 5 PM CDT HAS BEEN REPLACED BY A NEW WATCH. THE NEW SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM CDT...AND INCLUDES THE WHOLE WESTERN HALF OF THE STATE AS FAR EAST AS BOTTINEAU...MCHENRY...SHERIDAN...BURLEIGH...AND EMMONS COUNTIES. COUNTIES EAST OF THIS LINE ARE NO LONGER IN A SEVERE THUNDERSTORM WATCH...BUT THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING AND SEVERE WEATHER WATCHES MAY BE ISSUED LATER THIS EVENING. JV NNNN
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 4:49 AM MDT | Severe Thunderstorm Warning | BIS | Sheridan, Wells | 41 min |
| Aug 15, 2:44 PM MDT | Severe Thunderstorm Warning | BIS | Billings | 61 min |
| Aug 15, 3:06 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, Stark | 54 min |
| Aug 15, 3:20 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 45 min |
| Aug 15, 3:36 PM MDT | Severe Thunderstorm Warning | BIS | Bowman | 54 min |
| Aug 15, 3:46 PM MDT | Severe Thunderstorm Warning | BIS | Slope | 59 min |
| Aug 15, 3:55 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, Stark | 65 min |
| Aug 15, 4:20 PM MDT | Severe Thunderstorm Warning | BIS | Mercer, Morton, Oliver | 55 min |
| Aug 15, 4:20 PM MDT | Severe Thunderstorm Warning | BIS | McLean | 55 min |
| Aug 15, 4:25 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 60 min |
| Aug 15, 4:33 PM MDT | Severe Thunderstorm Warning | BIS | Hettinger | 57 min |
| Aug 15, 4:36 PM MDT | Tornado Warning | BIS | Mercer | 39 min |
| Aug 15, 5:16 PM MDT | Severe Thunderstorm Warning | BIS | McLean | 44 min |
| Aug 15, 5:19 PM MDT | Severe Thunderstorm Warning | BIS | Burleigh, Morton, Oliver | 56 min |
| Aug 15, 5:52 PM MDT | Tornado Warning | BIS | McHenry, McLean | 38 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1999Every severe thunderstorm warning in 1999
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.