Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 145, NWS Bismarck, ND

August 29, 1997Logan County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 29, 1997, 3:31 PM CDT for Logan County, North Dakota. It was in force for 44 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
Aug 29, 1997, 3:31 PM CDT (20:31 UTC)
Expired
Aug 29, 1997, 4:15 PM CDT
In force
44 min
Issued by
NWS Bismarck, ND
Area
Whole counties

County Logan County, ND

The radar

The Bismarck radar (KBIS), 104 km from the middle of the area, began a volume at 20:34 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

TimeReportWhereRemark
Aug 29, 3:45 PM CDTThunderstorm Wind 65Napoleon, NDthunderstorm winds blew down a chain link fence around the school. Also numerous trees fell in town with some falling across houses or automobiles.

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, 8.5 hours before the alert went out and 100 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.

Skew-T log-pSkew-T log-p diagram, Bismarck Municip, ND at 12:00Z on 1997-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1638 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 12:00Z on 1997-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1638 J/kg
Mixed-layer CIN
-278 J/kg
Mixed-layer LCL
1238 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KBIS 292030 RRA
SVRBIS
NDC047-292115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
331 PM CDT FRI AUG 29 1997
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL NORTH DAKOTA
 
   ...LOGAN COUNTY
 
AT 325 PM CDT WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 10
MILES WEST OF BURNSTAD OR 55 SOUTHEAST OF BISMARCK. THE STORM IS MOVING
EAST AT 20 MPH. TOWNS IN OR NEAR THE PATH OF THIS STORM INCLUDE
BURNSTAD...FREDONIA AND GACKLE.
 
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.
 
HINTZ/MANTHE

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 29, 12:25 PM CDT, 3 hours 6 minutes before
NDZ034-035-291830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  BISMARCK ND
1225 PM CDT FRI AUG 29 1997

...HEAVY RAIN MOVING INTO THE BISMARCK/MANDAN AREA...

AT 1215 PM CDT WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS MOVING
INTO CENTRAL NORTH DAKOTA. THIS LINE EXTENDED FROM 20 MILES NORTH OF
BISMARCK NEAR THE TOWN OF REGAN TO 20 MILES SOUTHWEST OF BISMARCK. THE
LINE IS MOVING NORTHEAST AT 35 MPH.

EARLIER THE MANDAN AIRPORT REPORTED VERY HEAVY RAIN WITH THE
THUNDERSTORMS.

PERSONS IN THE TOWNS OF BISMARCK...MANDAN...REGAN AND BALDWIN CAN
EXPECTED THE LINE TO MOVE THROUGH THEIR AREAS BY 130 PM CDT. ALTHOUGH NO
SEVERE WEATHER IS ANTICIPATED...VERY HEAVY RAIN MAY CAUSE SOME PONDING
OF WATER ON THE ROADWAY.

CONTINUE TO MONITOR YOUR LOCAL TV...RADIO OR NOAA WEATHER RADIO FOR
FURTHER STATEMENTS AND UPDATES.

HINTZ
Special weather statement, Aug 29, 12:27 PM CDT, 3 hours 4 minutes before
NDZ034-035-291830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  BISMARCK ND
1225 PM CDT FRI AUG 29 1997

...HEAVY RAIN MOVING INTO THE BISMARCK/MANDAN AREA...

AT 1215 PM CDT WEATHER RADAR INDICATED A LINE OF THUNDERSTORMS MOVING
INTO CENTRAL NORTH DAKOTA. THIS LINE EXTENDED FROM 20 MILES NORTH OF
BISMARCK NEAR THE TOWN OF REGAN TO 20 MILES SOUTHWEST OF BISMARCK. THE
LINE IS MOVING NORTHEAST AT 35 MPH.

EARLIER THE MANDAN AIRPORT REPORTED VERY HEAVY RAIN WITH THE
THUNDERSTORMS.

PERSONS IN THE TOWNS OF BISMARCK...MANDAN...REGAN AND BALDWIN CAN
EXPECTED THE LINE TO MOVE THROUGH THEIR AREAS BY 130 PM CDT. ALTHOUGH NO
SEVERE WEATHER IS ANTICIPATED...VERY HEAVY RAIN MAY CAUSE SOME& PONDING
OF WATER ON THE ROADWAY.

CONTINUE TO MONITOR YOUR LOCAL TV...RADIO OR NOAA WEATHER RADIO FOR
FURTHER STATEMENTS AND UPDATES.

HINTZ

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 29, 1:40 PM CDTSevere Thunderstorm WarningBISBurleigh, Kidder65 min
Aug 29, 4:37 PM CDTSevere Thunderstorm WarningBISDickey53 min
Aug 29, 5:33 PM CDTSevere Thunderstorm WarningBISDickey27 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.