Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 98, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 18, 1997, 4:20 AM CDT for Burleigh County, Morton County, North Dakota. It was in force for 55 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 18, 1997, 4:20 AM CDT (09:20 UTC)
- Expired
- Jul 18, 1997, 5:15 AM CDT
- In force
- 55 min
- Issued by
- NWS Bismarck, ND
- Area
- Whole counties
Counties Burleigh County, ND, Morton County, ND
The radar
The Bismarck radar (KBIS), 12 km from the middle of the area, began a volume at 09:20 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, 4:35 AM CDT | Thunderstorm Wind 52 | Glen Ullin, ND | trees toppled in Glen Ullin |
| Jul 18, 5:00 AM CDT | Thunderstorm Wind 65 | Bismarck, ND | strong winds blew a 10" diameter branch down onto a Jeep. Power was also lost to 500 homes. |
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 00:00Z, 9.3 hours before the alert went out and 16 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 180922 RRA SVRBIS NDC015-059-181015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 420 AM CDT FRI JUL 18 1997 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL NORTH DAKOTA ...WESTERN BURLEIGH COUNTY...MORTON COUNTY AT 415 AM CDT (315 AM MDT) A LINE OF SEVERE THUNDERSTORMS WAS IN WESTERN MORTON COUNTY. THE LEADING EDGE OF THE STORMS WERE 25 MILES WEST OF BISMARCK. THE STORMS WERE MOVING EAST AT 35 MPH. DOPPLER RADAR WAS INDICATING VERY STRONG WINDS WITH THESE STORMS AS WELL AS VERY HEAVY RAIN. DANGEROUS LIGHTNING IS OCCURRING WITH THESE STORMS...AND SOME LARGE HAIL IS ALSO POSSIBLE. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL TH E STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. VINING/VAN ESS
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, Jul 18, 2:45 AM CDT, 1 hour 35 minutes before
NDZ001>003-009>011-017-180830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 245 AM CDT FRI JUL 18 1997 ...SEVERE THUNDRSTORM WATCH CANCELLED FOR PART OF NORTHWEST NORTH DAKOTA... THE NORTHWEST NORTH DAKOTA COUNTIES OF DIVIDE...WILLIAMS...MCKENZIE...BURKE...MOUNTRAIL...RENVILLE AND WARD HAVE BEEN REMOVED FROM THE SEVERE THUNDERSTORM WATCH. THE THUNDERSTORMS ARE NO LONGER SEVERE...BUT SOME HEAVY RAINS ARE STILL POSSIBLE. LM
Special weather statement, Jul 18, 2:58 AM CDT, 1 hour 22 minutes before
NDZ034-035-180900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 256 AM CDT (156 AM MDT) FRI JUL 18 1997 ...STRONG WINDS REPORTED MOVING INTO CENTRAL NORTH DAKOTA... STRONG EASTERLY WINDS OF 50 TO 60 MPH HAVE BEEN REPORTED IN WESTERN MORTON COUNTY IN THE TOWN OF GLEN ULLIN. THE WINDS ARE WELL AHEAD OF A BAND OF STRONG THUNDERSTORMS IN CENTRAL STARK COUNTY. STRONG WINDS OVER 50 MPH CAN BE EXPECTED THROUGH CENTRAL AND EASTERN MORTON COUNTY. THE STRONG WINDS WILL MOVE THROUGH NEW SALEM AND ALMONT..AND POSSIBLY INTO THE CITIES OF BISMARCK AND MANDAN AREA BY 4 AM CDT. VAN ESS &
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 12:19 AM CDT | Severe Thunderstorm Warning | BIS | McKenzie | 56 min |
| Jul 18, 12:23 AM CDT | Severe Thunderstorm Warning | BIS | Golden Valley | 52 min |
| Jul 18, 12:45 AM CDT | Severe Thunderstorm Warning | BIS | Billings | 60 min |
| Jul 18, 1:24 AM CDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger | 51 min |
| Jul 18, 2:05 AM CDT | Severe Thunderstorm Warning | BIS | Stark | 55 min |
| Jul 18, 2:28 AM CDT | Severe Thunderstorm Warning | BIS | Hettinger | 62 min |
| Jul 18, 3:02 AM CDT | Severe Thunderstorm Warning | BIS | Hettinger, Stark | 58 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.