Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 42, NWS Grand Forks, ND

June 22, 1997Grant County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 22, 1997, 11:45 PM CDT for Grant County, Minnesota. It was in force for 45 min. 2 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 22, 1997, 11:45 PM CDT (04:45 UTC)
Expired: Jun 23, 1997, 12:30 AM CDT
In force: 45 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Grant County, MN

The radar

The Aberdeen radar (KABR), 194 km from the middle of the area, began a volume at 04:44 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 22, 11:58 PM CDT	Hail 1	Elbow Lake, MN
Jun 23, 12:03 AM CDT	Hail 1.75	Elbow Lake, 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.8 hours before the alert went out and 219 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: 1720 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1224 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 320 m²/s²
0-3 km storm-relative helicity: 538 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 33.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 230445 RRA
SVRFAR
MNC051-230530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1145 PM CDT SUN JUN 22 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1230 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL MINNESOTA
 
   ...GRANT COUNTY
 
AT 1145 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WAS
LOCATED 5 MILES NORTHEAST OF HERMAN MINNESOTA...OR 25 MILES SOUTH OF
FERGUS FALLS. THIS THUNDERSTORM HAS A HISTORY OR PRODUCING HAIL THE SIZE
OF GOLFBALLS. THE THUNDERSTORM WAS MOVING EAST AT 20 MPH...AND WILL PASS
JUST SOUTH OF THE TOWN OF BARRETT AROUND MIDNIGHT...AND NORTH OF HOFFMAN
BY 1215 AM.
 
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO
PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.
 
 
RA

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.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 22, 9:01 PM CDT, 2 hours 44 minutes earlier.

Area forecast discussion, Jun 22, 9:01 PM CDT, 2 hours 44 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
900 PM CDT SUN JUN 22 1997

FIRST PERIOD DISCUSSION...STRMS CONT TO OCCUR ALNG A THETA E GRAD
IN ERN ND. GRAD FCST TO MOV SLOLY NE AND E OVRNT. ADAP HAS
QUITE STRNG MOIST CNVG ALNG THE WRN N AND S DAK BRDR. APPARENTLY
CNVG AND UPSLOPE STRNG ENUF WITH STRMS FIRING IN THE HI PLNS.
THINK THESE STRMS COULD REACH CWA LATER TNGT. SNDGS QUITE UNSTABLE
TO THE S BUT MOST HAVE EITHER A CAP OR A FAIRLY HIGH NEG AREA XCPT
FOR UNR.  SFC DWPTS GENERALLY IN THE 60S...SO A HUMID NIGHT FCST.
WL CHECK OVR ZONES BUT WILL LIKELY LEAVE AS IS.

HOPPES

In the hours before

Local storm report, Jun 22, 7:27 PM CDT, 4 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION FOR MONTH OF EVENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
726 PM CDT SUN JUN 22 1997

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

0720 PM    3-1/2 E OF VALLEY CITY    ND   3/4 INCH HAIL
06/22/97   BARNES

Local storm report, Jun 22, 9:55 PM CDT, 1 hour 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
955 PM CDT SUN JUN 22 1997

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

950 PM    1 SSW LIDGERWOOD          ND   GOLFBALL SIZE HAIL
06/22/97   RICHLAND

Local storm report, Jun 22, 10:34 PM CDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1034 PM CDT SUN JUN 22 1997

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

1O25 PM    4W FAIRMOUNT              ND   GOLFBALL SIZE HAIL
06/22/97   RICHLAND

Local storm report, Jun 22, 10:35 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1034 PM CDT SUN JUN 22 1997

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

1O25 PM    4W FAIRMOUNT              ND   GOLFBALL SIZE HAIL
06/22/97   RICHLAND

Local storm report, Jun 22, 11:27 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1127 PM CDT SUN JUN 22 1997

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

1125 PM    NORCROSS                  MN   1-1.5 INCH HAIL
06/22/97   GRANT

Local storm report, Jun 22, 11:28 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1127 PM CDT SUN JUN 22 1997

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

1125 PM    NORCROSS                  MN   1-1.5 INCH HAIL
06/22/97   GRANT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 11:06 PM CDT	Severe Thunderstorm Warning	FGF	Grant	39 min
Jun 23, 1:00 AM CDT	Severe Thunderstorm Warning	FGF	Clay	30 min
Jun 23, 1:29 AM CDT	Severe Thunderstorm Warning	FGF	Clay	31 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997 Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.