Alert archive / North Dakota / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 21, NWS Grand Forks, ND

July 8, 1989Griggs County, Steele County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 8, 1989, 9:55 PM CDT for Griggs County, Steele County, North Dakota. It was in force for 65 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: Jul 8, 1989, 9:55 PM CDT (02:55 UTC)
Expired: Jul 8, 1989, 11:00 PM CDT
In force: 65 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Griggs County, ND, Steele 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
Jul 8, 10:08 PM CDT	Thunderstorm Wind 56	Griggs, 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, 2.9 hours before the alert went out and 219 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: 767 J/kg
Mixed-layer CIN: -194 J/kg
Mixed-layer LCL: 3252 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 312 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 090257
SVRFAR
NDC039-091-090400-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FARGO ND
955 PM CDT SAT JUL 8 1989

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE EAST CENTRAL PART OF NORTH DAKOTA
      GRIGGS...STEELE

CITIES EFFECTED BY THIS WARNING ARE COOPERSTOWN AND SHARON.

AT 945 PM CDT AND SEVERE THUNDERSTORM WAS LOCATED 60 MILES
NORTH OF JAMESTOWN NORTH DAKOTA MOVING SOUTHEAST AT 45 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 WImTH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT.

PRUITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 10:15 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	40 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1989 Every severe thunderstorm warning in 1989

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.