Alert archive / Minnesota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 16, NWS Grand Forks, ND

June 9, 19914 counties in Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 1991, 4:07 PM CDT for 4 counties in Minnesota. It was in force for 68 min. 4 reports 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
Jun 9, 1991, 4:07 PM CDT (21:07 UTC)
Expired
Jun 9, 1991, 5:15 PM CDT
In force
68 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Becker County, MN, Clay County, MN, Otter Tail County, MN, Wilkin County, MN

What was reported inside it

TimeReportWhereRemark
Jun 9, 4:07 PM CDTTornado F1Becker, MN
Jun 9, 4:40 PM CDTThunderstorm Wind 0Clay, MN
Jun 9, 4:48 PM CDTHail 1Becker, MN
Jun 9, 5:20 PM CDTThunderstorm Wind 0Otter Tail, MN

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

Aberdeen, SD (KHON), launched 12:00Z, 9.1 hours before the alert went out and 265 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 1991-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1527 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 1991-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 235 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1527 J/kg
Mixed-layer CIN
-183 J/kg
Mixed-layer LCL
978 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
235 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 2 hours 51 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, 2 hours 33 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
Local storm report, Jun 9, 3:10 PM CDT, 57 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 12:02 PM CDTSevere Thunderstorm WarningFGFPolk58 min
Jun 9, 2:59 PM CDTSevere Thunderstorm WarningFGFBecker, Clay, Norman61 min
Jun 9, 3:52 PM CDTSevere Thunderstorm WarningFGFKoochiching68 min
Jun 9, 5:13 PM CDTSevere Thunderstorm WarningFGFOtter Tail, Wilkin62 min
Jun 9, 10:28 AM CDTSevere Thunderstorm WarningFGFNelson62 min
Jun 9, 11:28 AM CDTSevere Thunderstorm WarningFGFGrand Forks62 min
Jun 9, 1:55 PM CDTSevere Thunderstorm WarningFGFCass, Steele, Traill65 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1991Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.