Alert archive / Minnesota / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 9, NWS Grand Forks, ND

June 29, 1989Beltrami County, Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 29, 1989, 6:00 PM CDT for Beltrami County, Lake of the Woods County, Minnesota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jun 29, 1989, 6:00 PM CDT (23:00 UTC)
Expired
Jun 29, 1989, 7:00 PM CDT
In force
60 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Beltrami County, MN, Lake of the Woods County, MN

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

International Fa, MN (KINL), launched 12:00Z, 11.0 hours before the alert went out and 122 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, International Fa, MN at 12:00Z on 1989-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, International Fa, MN at 12:00Z on 1989-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
237 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

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

Special weather statement, Jun 29, 3:06 PM CDT, 2 hours 54 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
305 PM CDT THU JUN 29 1989

AT 300 PM CDT AN INTENSE THUNDERSTORM HAD DEVELOPED 20 MILES NORTHEAST
OF THIEF RIVER FALLS IN NORTHWEST MINNESOTA...NEAR THE AGASSIZ WILDLIFE
REFUGE.   HAIL...DEADLY LIGHTNING AND DAMIGING WINDS ARE LIKELY AS THIS
STORM MOVES NORTHEAST AT 25 MILES AN HOUR.

THIS STORM WILL CROSS THE THIEF LAKE REFUGE BETWEEN 315 AND 345 PM CDT.
BOATERS AND CAMPERS AREA ADVISED TO SEEK SHELTER IF YOU ARE IN THE
PATH OF THIS STORM.

CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS
ACROSS NORTHWEST MINNESOTA THIS AFTERNOON AND EVENING.  STAY TUNED TO
RADIO...T.V. AS WELL AS NOAA WEATHER RADIO FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.
EWENS
Special weather statement, Jun 29, 4:46 PM CDT, 1 hour 14 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
440 PM CDT THU JUN 29 1989

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM CDT
   FOR A LARGE PART OF NORTHERN MINNESOTA...

AT 426 PM CDT...SEVERAL STRONG THUNDERSTORMS WERE LOCATED
OVER NORTHWEST MINNESOTA.  THESE THUNDERSTORMS WERE BETWEEN
25 MILES AND 45 MILES NORTHEAST OF THIEF RIVER FALLS MINNESOTA
OR JUST NORTH AND NORTHEAST OF THE TOWN OF GRYGLA.  MOVEMENT
OF THESE THUNDERSTORMS WAS TO THE EAST-NORTHEAST AT 20 MILES
AN HOUR AND THEY SHOULD REMAIN OVER THE NORTHWEST QUARTER OF
BELTRAMI COUNTY AND MOVE INTO SOUTHWEST LAKE OF THE WOODS COUNTY
BY 530 PM CDT.  STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY
RAIN...AND DANGEROUS LIGHTNING ARE LIKELY WITH THESE STRONG
THUNDERSTORMS.

ALSO...SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH VERY HEAVY
RAIN...WERE LOCATED OVER NORTHWEST MINNESOTA.  THESE SHOWERS
AND THUNDERSTORMS WERE ALSO MOVING TO THE EAST-NORTHEAST AT
20 MILES AN HOUR.
MB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 3:18 PM CDTSevere Thunderstorm WarningFGFMarshall42 min
Jun 29, 4:00 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods60 min
Jun 29, 5:00 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods60 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1989Every 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; the sounding from the Mesonet's radiosonde archive.