Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 147, NWS Grand Forks, ND

August 21, 1996Marshall County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 21, 1996, 7:45 AM CDT for Marshall County, Minnesota. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 21, 1996, 7:45 AM CDT (12:45 UTC)
Expired
Aug 21, 1996, 8:00 AM CDT
In force
15 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Marshall County, MN

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 0.8 hours before the alert went out and 227 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 1996-08-21Temperature 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 1996-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.19395878Sfc1 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
1019 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 211245
SVRFAR
MNC089-211300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA ND
745 AM CDT WED AUG 21 1996
 
THE NATIONAL WEATHER SERVICE IN EASTERN NORTH DAKOTA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST MINNESOTA
 
   ...MARSHALL COUNTY
 
AT 745 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM LOCATED OVER
NEWFOLDEN...OR 20 MILES NORTHWEST OF THIEF RIVER FALLS. THE STORM WAS
MOVING EAST AT 35 MILES. THE SEVERE THUNDERSTORM WARNING IS EXTENDED
UNTIL 8 AM CDT. THE CITY OF HOLT IS IN THE PATH OF THIS STORM.
 
WHEN THUNDERSTORMS ARE OCCURRING...MOVE INTO A STRONG BUILDING.
DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES AND STAY AWAY FROM
WINDOWS.
 
KENNEDY

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, Aug 21, 3:11 AM CDT, 4 hours 34 minutes before
NDZ016-210845-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA ND
310 AM CDT WED AUG 21 1996

...A SEVERE THUNDERSTORM WARNING CONTINUES FOR EASTERN WALSH COUNTY
UNTIL 330 AM CDT...

AT 3 AM CDT 50 TO 60 MPH WINDS WERE REPORTED IN GRAFTON. AT 307 AM
THUNDERSTORMS EXTENDED FROM ADAMS...45 MILES NORTHEAST OF DEVILS LAKE
TO THE RED RIVER EAST OF GRAFTON. MOVEMENT WAS NORTHEAST AT 25 MPH.
THE THUNDERSTORMS WILL EXTEND ALONG THE NORTHERN WALSH COUNTY LINE
FROM HOOPLE TO DRAYTON BY 330 AM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND OVER 57 MPH...HAIL
3/4 INCH IN DIAMETER OR LARGER...TORNADOES...DEADLY
LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO A SMALL INTERIOR
ROOM  ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

HOPPES

&
Local storm report, Aug 21, 7:02 AM CDT, 43 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA
700 AM CDT WED AUG 21 1996

TIME(CDT)     .....CITY LOCATION....    STATE      ...EVENT/REMARKS...
              ....COUNTY LOCATION...

0215 AM       PETERSBERG                ND         1.00 INCH HAIL
08/21/96      NELSON

0300 PM       GRAFTON                   ND         WINDS 60 MPH
08/21/96      WALSH

0418 PM       5W CHURCHES FERRY         ND         0.75 INCH HAIL
08/12/96      BENSON

0459 PM       CAVILIER                  ND         0.75 INCH HAIL
08/21/96      PEMBINA

KENNEDY
Local storm report, Aug 21, 7:28 AM CDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA
700 AM CDT WED AUG 21 1996

TIME(CDT)     .....CITY LOCATION....    STATE      ...EVENT/REMARKS...
              ....COUNTY LOCATION...

0215 AM       PETERSBERG                ND         1.00 INCH HAIL
08/21/96      NELSON

0300 AM       GRAFTON                   ND         WINDS 60 MPH
08/21/96      WALSH

0418 AM       5W CHURCHES FERRY         ND   P      0.75 INCH HAIL
08/21/96      BENSON

0459 AM       CAVILIER                  ND         0.75 INCH HAIL
08/21/96      PEMBINA

KENNEDY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 21, 7:20 AM CDTSevere Thunderstorm WarningFGFMarshall25 min
Aug 21, 9:39 AM CDTSevere Thunderstorm WarningFGFBeltrami36 min
Aug 21, 10:15 AM CDTSevere Thunderstorm WarningFGFBeltrami30 min
Aug 21, 11:09 AM CDTSevere Thunderstorm WarningFGFBeltrami36 min
Aug 21, 5:55 PM CDTSevere Thunderstorm WarningFGFClearwater35 min
Aug 21, 6:12 PM CDTSevere Thunderstorm WarningFGFWilkin48 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996

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.