Alert archive / North Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 13, NWS Grand Forks, ND

June 9, 1991Cass County, Steele County, Traill County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 1991, 1:55 PM CDT for Cass County, Steele County, Traill County, North Dakota. It was in force for 65 min.

The area

The counties it named.

The facts

Issued: Jun 9, 1991, 1:55 PM CDT (18:55 UTC)
Expired: Jun 9, 1991, 3:00 PM CDT
In force: 65 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Cass County, ND, Steele County, ND, Traill County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 6.9 hours before the alert went out and 258 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: 629 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 091855
SVRFAR
NDC017-091-097-092000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
155 PM CDT SUN JUN 9 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 300 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EAST CENTRAL PART OF NORTH DAKOTA
      EXTREME NORTHERN CASS...SOUTHEAST STEELE...SOUTHERN TRAILL

AT 150 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 45 MILES
NORTHWEST OF FARGO NORTH DAKOTA OR BETWEEN THE TOWNS OF PILLSBURY
...COLGATE...AND PAGE.  THIS THUNDERSTORM WAS MOVING TO THE
EAST AT 30 MILES AN HOUR.

SOME TOWNS INCLUDED IN THIS WARNING ARE PAGE...COLGATE...BLANCHARD
...AND HUNTER NORTH DAKOTA.

IF YOU ARE CAUGHT OUTSIDE...FIND SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE POSSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT.
IF YOU SPOT A FUNNEL OR A TORNADO YOU SHOULD SEEK SHELTER IN A
REINFORCED BUILDING OR IN AN INTERIOR ROOM AWAY FROM OUTSIDE WALLS.

MB

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

Local storm report, Jun 9, 1:16 PM CDT, 39 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
115 PM CDT SUN JUN 9 1991

TIME      EVENT
1030 AM   COOPERATIVE OBSERVER 10 MILES NORTHWEST OF MCVILLE NORTH
          DAKOTA REPORTED 1/2 INCH HAIL AND WINDS GUSTING TO 55 MILES
          AN HOUR.

1140 AM   OBSERVER AT COLGATE NORTH DAKOTA REPORTED .50 INCHES OF RAIN
          IN 20 MILES AND SOME SMALL HAIL.

1236 PM   THIEF RIVER FALLS WARNING POINT REPORTED THAT CROOKSTON
          MINNESOTA WAS RECEIVING VERY HEAVY RAIN...NO HAIL AND 30 TO
          35 MILES AN HOUR WIND.

100  PM   HAM OPERATER BETWEEN MCINTOSH AND MENTOR MINNESOTA REPORTED
          PEA SIZE HAIL AND VERY HEAVY RAINS. THIS IS IN POLK COUNTY
          OF NORTHWEST MINNESOTA.

105 PM    FINLEY NORTH DAKOTA REPORTED .80 INCHES OF RAIN IN 10
          MINUTES ALONG WITH PEA SIZE HAIL AND 30 TO 40 MPH WIND.
NORDLAND

Special weather statement, Jun 9, 1:34 PM CDT, 21 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013- 091930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FARGO ND
135 PM CDT SUN JUN 09 1991

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF EAST CENTRAL
AND SOUTHEAST NORTH DAKOTA AND MOST OF WEST CENTRAL AND NORTHWEST
MINNESOTA...

AT 125 PM CDT...SCATTERED THUNDERSTORMS CONTINUE TO DEVELOP ACROSS THE
AREA AND DROP HEAVY RAINS IN A SHORT AMOUNT OF TIME. SOME OF THE
STRONGER STORMS WERE LOCATED OVER RED LAKE COUNTY IN NORTHWEST
MINNESOTA AND ALSO OVER NORTHERN STEELE COUNTY IN EAST CENTRAL NORTH
DAKOTA.

THESE STORMS WERE MOVING TO THE NORTHEAST AT 30 MILES AN HOUR AND
THE STRONGER STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAINS...
HAIL AND STRONG WINDS. STAY TUNED TO YOUR LOCAL RADIO OR TV STATION
OR NOAA WEATHER RADIO FOR FURTHER STATEMENTS OR POSSIBLE WARNINGS.
NORDLAND

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 10:28 AM CDT	Severe Thunderstorm Warning	FGF	Nelson	62 min
Jun 9, 11:28 AM CDT	Severe Thunderstorm Warning	FGF	Grand Forks	62 min
Jun 9, 12:02 PM CDT	Severe Thunderstorm Warning	FGF	Traill	58 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1991 Every severe thunderstorm warning in 1991

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.