Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 76, NWS Bismarck, ND

August 25, 1990McIntosh County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 25, 1990, 9:25 PM CDT for McIntosh County, North Dakota. It was in force for 30 min.

The area

The counties it named.

The facts

Issued: Aug 25, 1990, 9:25 PM CDT (02:25 UTC)
Expired: Aug 25, 1990, 9:55 PM CDT
In force: 30 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County McIntosh County, ND

The radar

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

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.4 hours before the alert went out and 121 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 260238 COR
SVRBIS
NDC051-260315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECT SPELLING 7TH LINE...
NATIONAL WEATHER SERVICE BISMARCK ND
925 PM CDT SAT AUG 25 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY

   IN THE SOUTH CENTRAL PART OF NORTH DAKOTA
      MCINTOSH

AT 920 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES
SOUTHWEST OF ASHLEY OR 85 MILES SOUTHEAST OF BISMARCK. THIS
RAPIDLY GROWING THUNDERSTORM WILL BE MOVING NORTHEAST 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.

THIS SLOW MOVING THUNDERSTORM MAY CAUSE FLOODING OF SMALL STREAMS
A>ND UNDERPASSES.

 LM

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 25, 9:02 PM CDT, 23 minutes before

NDZ001>018-250500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
845 PM CDT SAT AUG 25 1990

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PORTIONS OF SOUTHEAST
NORTH DAKOTA UNTIL 100 AM CDT...

VERY UNSTABLE AIR COVERS SOUTHEAST NORTH DAKOTA...AND SEVERE
THUNDERSTORMS ARE POSSIBLE THERE UNTIL 1 AM CDT EARLY THIS SUNDAY
MORNING.

FARTHER WEST...BISMARCK RADAR DETECTED A VERY VIGOROUS THUNDERSTORM AT
850 PM CDT IN THE SOUTHWEST TIP OF GRANT COUNTY...ABOUT 75 MILES
SOUTHWEST OF BISMARCK. THIS STORM CONTAINED VERY HEAVY RAIN AND POSSIBLY
SOME HAIL. IT WAS MOVING NORTHEAST 15 MPH.

ELSEWHERE AROUND THE STATE...RADARS INDICATED WIDELY SCATTERED
THUNDERSTORMS ABOUT 20 MILES NORTHWEST OF DICKINSON AND 30 MILES
NORTHEAST OF MINOT. THESE STORMS WERE MOVING NORTHEAST 15 MPH.
<
UNSTABLE AIR COVERS NORTH DAKOTA...AND SEVERE THUNDERSTORMS ARE
POSSIBLE TONIGHT...ESPECIALLY IN THE SOUTHEAST UNTIL 1 AM CDT.
LM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 7:21 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant	54 min
Aug 26, 1:36 AM CDT	Severe Thunderstorm Warning	BIS	Benson, Ramsey	54 min
Aug 26, 1:55 AM CDT	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; the sounding from the Mesonet's radiosonde archive.