Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 93, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 17, 1997, 11:45 PM MDT for Billings County, North Dakota. It was in force for 60 min. 1 report 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 17, 1997, 11:45 PM MDT (05:45 UTC)
- Expired
- Jul 18, 1997, 12:45 AM MDT
- In force
- 60 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
County Billings County, ND
The radar
The Bismarck radar (KBIS), 201 km from the middle of the area, began a volume at 05:49 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 18, 12:05 AM MDT | Thunderstorm Wind 52 | Medora, ND | winds occurred 3 E Medora |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 17, 11:00 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 5.8 hours before the alert went out and 205 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
- 1566 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 1879 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBIS 180545 RRA SVRBIS NDC007-180645- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 1245 AM CDT (1145 PM MDT) FRI JUL 18 1997 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 145 AM CDT (1245 AM MDT) FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL NORTH DAKOTA ...BILLINGS COUNTY AT 1140 PM MDT A LINE OF SEVERE THUNDERSTORMS WAS MOVING THROUGH GOLDEN VALLEY COUNTY...45 MILES WEST OF DICKINSON. THE SEVERE THUNDERSTORMS WERE MOVING EAST AT 35 MPH. THE SEVERE THUNDERSTORMS WILL MOVE THROUGH BILLINGS COUNTY INCLUDING THE TOWNS OF MEDORA...BELFIELD AND FAIRFIELD. AT 1130 PM MDT DAMAGING WINDS WITH TREE BRANCHES DOWN AND DIME SIZE HAIL WERE REPORTED IN THE TOWN OF BEACH IN WESTERN GOLDEN VALLEY COUNTY. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. VAN ESS &
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 11:19 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 56 min |
| Jul 17, 11:23 PM MDT | Severe Thunderstorm Warning | BIS | Golden Valley | 52 min |
| Jul 18, 12:24 AM MDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger | 51 min |
| Jul 18, 1:05 AM MDT | Severe Thunderstorm Warning | BIS | Stark | 55 min |
| Jul 18, 1:28 AM MDT | Severe Thunderstorm Warning | BIS | Hettinger | 62 min |
| Jul 18, 2:02 AM MDT | Severe Thunderstorm Warning | BIS | Hettinger, Stark | 58 min |
| Jul 18, 3:20 AM MDT | Severe Thunderstorm Warning | BIS | Burleigh, Morton | 55 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 1997Every severe thunderstorm warning in 1997
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.