Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 9, NWS Grand Forks, ND

June 11, 1990Steele County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 11, 1990, 8:07 PM CDT for Steele County, North Dakota. It was in force for 68 min.

The area

The counties it named.

The facts

Issued: Jun 11, 1990, 8:07 PM CDT (01:07 UTC)
Expired: Jun 11, 1990, 9:15 PM CDT
In force: 68 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Steele 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, 1.1 hours before the alert went out and 238 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: 172 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1672 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 120107
SVRFAR
NDC003-045-091-120215-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
807 PM CDT MON JUN 11 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 915 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF NORTH DAKOTA
      BARNES...STEELE...THE CITY OF VALLEY CITY...

   IN THE SOUTHEAST PART OF NORTH DAKOTA
      EASTERN LA MOURE...

AT 8 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS THAT
EXTENDED FROM 50 MILES NORTHEAST OF JAMESTOWN NORTH DAKOTA TO
30 MILES SOUTHEAST OF JAMESTOWN.  THESE THUNDERSTORMS WERE
MOVING TO THE NORTHEAST AT 20 MILES AN HOUR.

SOME TOWNS INCLUDED IN THIS WARNING ARE FINLEY...HOPE...LITCHVILLE
...AND THE BALDHILL HILL DAM RECREATION AREA.

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
...AVOID DRIVING INTO AREAS WHERE WATER COVERS THE ROAD.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT.

IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A PLACE OF
SAFETY IMMEDIATELY.  REPORT ALL SEVERE WEATHER TO YOUR LOCAL LAW
ENFORCEMENT AGENCY AFTER THE STORM PASSES.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 8:07 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, LaMoure	68 min
Jun 11, 8:26 PM CDT	Severe Thunderstorm Warning	FGF	Cavalier, Pembina	64 min
Jun 11, 8:54 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom	66 min
Jun 11, 8:54 PM CDT	Severe Thunderstorm Warning	FGF	Traill	66 min
Jun 11, 9:28 PM CDT	Severe Thunderstorm Warning	FGF	Cass	62 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.