Alert archive / North Dakota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 19, NWS Grand Forks, ND

June 19, 1990Grand Forks County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 19, 1990, 7:47 PM CDT for Grand Forks County, North Dakota. It was in force for 58 min.

The area

The counties it named.

The facts

Issued: Jun 19, 1990, 7:47 PM CDT (00:47 UTC)
Expired: Jun 19, 1990, 8:45 PM CDT
In force: 58 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Grand Forks 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, 0.8 hours before the alert went out and 276 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: 431 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1835 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 200047
SVRFAR
NDC017-035-MNC027-200145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
747 PM CDT TUE JUN 19 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 845 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF NORTH DAKOTA
      CASS...THE CITIES OF FARGO/MOORHEAD...

   IN THE NORTHEAST PART OF NORTH DAKOTA
      GRAND FORKS...

   IN THE NORTHWEST PART OF MINNESOTA
      WESTERN CLAY...

AT 745 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 20 TO 35
MILES NORTHWEST OF FARGO...AND JUST SOUTH OF THE GRAND FORKS AIR
FORCE BASE MOVING EAST AT 35 MILES AN HOUR.

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.

ARMSTRONG

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, Jun 19, 6:40 PM CDT, 1 hour 7 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013- 200025-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY.
NATIONAL WEATHER SERVICE FARGO ND
635 PM CDT TUE JUN 19 1990

...STRONG THUNDERSTORMS WITH VERY HEAVY RAIN OVER NORTHEAST NORTH
   DAKOTA...

AT 625 PM CDT...STRONG THUNDERSTORMS HAD DEVELOPED OVER NORTHEAST
NORTH DAKOTA IN GRIGGS AND STEELE COUNTYS NEAR THE TOWNS OF COOPERS-
TOWN...HANNAFORD AND DAZY.

THESE STRONG THUNDERSTORMS WERE MOVING EAST AT 35 MILES AN HOUR AND
SHOULD AFFECT THE CITIES OF MAYVILLE AND HILLSBORO BY 730 PM.

BRIEF GUSTY WIND...HEAVY RAIN...FREQUENT LIGHTING AND POSSIBLE HAIL
CAN BE EXPECTED FROM THESE STORMS.

THESE STRONG THUNDERSTORMS WERE LOCATED IN +AN AREA OF SHOWERS AND
THUNDERSTORMS THAT WAS 40 MILES WIDE...AND EXTENDED FROM NORTH OF
 THE INTERNATIONAL BORDER NORTH OF CAVALIER AND PEMBINA COUNTY
IN NORTHEAST NORTH DAKOTA...TO NORTH OF ABERDEEN SOUTH DAKOTA.
PRUITT

Local storm report, Jun 19, 7:29 PM CDT, 18 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
730 PM CDT TUE JUN 19 1990

TIME          EVENT

625 PM CDT    MC VILLE NE...40 SE DVL REPORTS PEA SIZE HAIL...HVY RAIN
              ...40 TO 45 MPH WIND BY STATE RADIO

705 PM CDT    WALL CLOUD WITH ROTATION JUST NW OF LARIMORE...GRAND FORKS
              COUNTY...REPORTED BY COUNTY SHERIFF

700 PM CDT    COOPERATIVE OBSERVER AT COLGATE ND...SOUTHERN STEELE CO.
              REPORTS PEA TO MARBLyE SIZE HAIL THEIR LOCATION

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:01 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	59 min
Jun 19, 7:47 PM CDT	Severe Thunderstorm Warning	FGF	Cass	58 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.