Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 12, NWS Grand Forks, ND

June 11, 1990Traill County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 11, 1990, 8:54 PM CDT for Traill County, North Dakota. It was in force for 66 min.

The area

The counties it named.

The facts

Issued: Jun 11, 1990, 8:54 PM CDT (01:54 UTC)
Expired: Jun 11, 1990, 10:00 PM CDT
In force: 66 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Traill 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, 1.9 hours before the alert went out and 278 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 120154
SVRFAR
NDC017-073-097-120300-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF NORTH DAKOTA
      WESTERN CASS...TRAILL...

   IN THE SOUTHEAST PART OF NORTH DAKOTA
      RANSOM...

AT 845 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
THAT EXTENDED FROM 50 MILES NORTHWEST OF FARGO NORTH DAKOTA
TO 60 MILES SOUTHWEST OF FARGO OR OVER WESTERN TRAILL...
EASTERN BARNES...AND EXTREME WESTERN RANSOM COUNTIES.  THIS
LINE OF THUNDERSTORMS WAS MOVING TO THE EAST AT 25 MILES AN HOUR.

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.

IFB 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, 8:07 PM CDT	Severe Thunderstorm Warning	FGF	Steele	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, 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.