Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 75, NWS Bismarck, ND

August 25, 1990Adams County, Grant County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 25, 1990, 6:21 PM MDT for Adams County, Grant County, North Dakota. It was in force for 54 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 25, 1990, 6:21 PM MDT (00:21 UTC)
Expired: Aug 25, 1990, 7:15 PM MDT
In force: 54 min
Issued by: NWS Bismarck, ND
Area: Whole counties

Counties Adams County, ND, Grant County, ND

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Aug 25, 7:10 PM MDT	Hail 1	Grant, ND

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.4 hours before the alert went out and 122 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2995 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1209 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 12.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 260021
SVRBIS
NDC001-037-260115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE BISMARCK ND
621 PM MDT SAT AUG 25 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 715 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHWEST PART OF NORTH DAKOTA
      ADAMS...

   IN THE SOUTH CENTRAL PART OF NORTH DAKOTA
      SOUTHWEST GRANT...

AT 615 PM MDT GOLF BALL SIZE HAIL WAS REPORTED IN THE CITY OF
HETTINGER. RADAR INDICATED ANOTHER SEVERE THUNDERSTORM 15 MILES
NORTHEAST OF HETTINGER. THESE STORMS WERE MOVING NORTHEAST AT
15 MPH.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS 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 RAIN MAY FLOOD ROADWAYS QUICKLY
SO AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.

IF YOU A!RE IN AN AREA THREATENED BY THE STORM...GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...AND HEAVY RAIN.

 LLM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 8:25 PM MDT	Severe Thunderstorm Warning	BIS	McIntosh	30 min
Aug 26, 12:36 AM MDT	Severe Thunderstorm Warning	BIS	Benson, Ramsey	54 min
Aug 26, 12:55 AM MDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	35 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1990 Every severe thunderstorm warning in 1990

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.