Alert archive / North Dakota / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 87, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 2, 1998, 1:05 AM MDT for Mercer County, North Dakota. It was in force for 65 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
- Aug 2, 1998, 1:05 AM MDT (07:05 UTC)
- Expired
- Aug 2, 1998, 2:10 AM MDT
- In force
- 65 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Mercer County, ND
The radar
The Bismarck radar (KBIS), 101 km from the middle of the area, began a volume at 07:05 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 7.1 hours before the alert went out and 105 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
- 1083 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1215 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.3
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.
In the hours before
Special weather statement, Aug 1, 7:45 PM MDT, 5 hours 20 minutes before
NDZ031>033-040-041-043-044-020210- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 845 PM CDT SAT AUG 1 1998 THE SEVERE THUNDERSTORM WATCH FOR SOUTHWEST NORTH DAKOTA HAS BEEN CANCELLED. THE STORMS HAVE WEAKENED AND MOVED OUT OF THE AREA. HOWEVER...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR NORTHWEST NORTH DAKOTA. THE THREAT OF LARGE HAIL AND DAMAGING WINDS WILL CONTINUE IN NORTHWEST NORTH DAKOTA UNTIL MIDNIGHT CDT. LM8 LM
Special weather statement, Aug 1, 8:00 PM MDT, 5 hours 5 minutes before
NDZ003-011-019-021-020230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 900 PM CDT SAT AUG 1 1998 THE SEVERE THUNDERSTORM WATCH FOR RENVILLE...WARD...MCLEAN AND MERCER COUNTIES HAS BEEN CANCELLED. THE SEVERE STORMS ARE EXPECTED TO REMAIN FARTHER WEST...AND A THREAT OF LARGE HAIL AND DAMAGING WINDS WILL CONTINUE IN THE REMAINING WATCH AREA OF NORTHWEST NORTH DAKOTA UNTIL MIDNIGHT CDT. LM
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 6:46 PM MDT | Severe Thunderstorm Warning | BIS | Williams | 59 min |
| Aug 1, 8:25 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, Williams | 60 min |
| Aug 1, 9:38 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, Williams | 32 min |
Nearby
Severe Thunderstorm Warnings in North 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.