Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 182, NWS Grand Forks, ND

August 5, 1997Richland County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 5, 1997, 8:44 PM CDT for Richland County, North Dakota. It was in force for 16 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 5, 1997, 8:44 PM CDT (01:44 UTC)
Expired: Aug 5, 1997, 9:00 PM CDT
In force: 16 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Richland County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 143 km from the middle of the area, began a volume at 01:48 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 5, 4:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.7 hours before the alert went out and 189 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: 39 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1797 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 107 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 060145 RRA
SVRFAR
NDC077-060200-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
844 PM CDT TUE AUG 5 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST NORTH DAKOTA
 
   ...SOUTHERN RICHLAND COUNTY
 
AT 835 PM...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR HANKINSON
...OR 20 MILES SOUTHWEST OF WAHPETON. THIS STORM WAS MOVING SOUTH AT 30
MPH. DAMAGING WINDS IN EXCESS OF 60 MPH CAN ALSO BE EXPECTED ACROSS
SOUTHERN RICHLAND COUNTY.
 
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.
 
 
&

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 Aug 5, 2:50 PM CDT, 5 hours 54 minutes earlier.

Area forecast discussion, Aug 5, 2:50 PM CDT, 5 hours 54 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
250 PM CDT TUE AUG 5 1997

FCST CONCERN WILL BE SVR TSRA DEVELOPMENT INTO EARLY PART OF PERIOD.
SFC LOW HAS DEVELOPED ACROSS NE ND/S MB BORDER WITH TRAILING COLD FRONT
ACROSS NORTH PART OF STATE. ALL MORNING AND INTO AFTERNOON HOURS SCT
TSRA HAVE OCCURRED MAINLY ALONG N/S ORIENTED THERMAL BOUNDARY OVR
NORTHERN MN. WITH RAIN AND CLOUD COOLED AIR TEMPS ACROSS PTNS OF N MN
REMAIN GENERALLY IN THE 60S TO AROUND 70 DEGREES. ALTHOUGH A SEVERE
THREAT CONT FOR NW MN BELIEVE BEST AREA HAS SHIFTED WESTWARD TO INCLUDE
MOST OF ND. ALTHOUGH LOW LEVEL MOISTURE IS MARGINAL 60-65 DEGREE
DEWPOINTS EXIST ACROSS N CENTRAL ND INTO S MB NEAR SFC LOW. PLENTY OF
SOLAR HAS RISEN TEMPS INTO THE UPPER 70S AND 80S ACROSS ND. VERTICAL
SHEAR PROFILE ALSO CONDUSIVE FOR SVR WX. FROM PROGGED FAR SOUNDING TSRA
SHOULD TRACK SE AROUND 30KT. TSRA SHOULD MOVE OUT OF S PTN OF REGION BY
MID FOLLOWED BY DECREASING CLDS. MOS TEMPS FROM MID 50S TO AROUND 60
SEEM REASONABLE. WITH WK SFC FLOW AND CLEARING LATE AREAS OF FOG PSBL.
FOR DVL...THIS EVENING...SCT TSRA FEW PSBL SEVERE.
          TONIGHT...DEC CLDS. LOW MID 50S N 5 TO 10.
GFK...THIS EVENING...SCT TSRA FEW PSBL SEVERE.
      TONIGHT...DEC CLDS. LOW MID 50S. LT N WIND.
FAR...THIS EVENING...SCT TSRA FEW PSBL SEVERE.
      TONIGHT...DEC CLDS. LOW MID 50S. LT N WND.
MSP WRK ZONES LOOK OK.
VOELKER

In the hours before

Local storm report, Aug 5, 6:20 PM CDT, 2 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
620 PM CDT TUE AUG 5 1997

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

0315 PM    BACKOO                   ND     0.75 INCH HAIL
08/05/97   PEMBINA                         TREE DAMAGE

0443 PM    GRAND FORKS              ND     0.75 INCH HAIL
08/05/97   GRAND FORKS

0454 PM    INSKTER                  ND     0.75 INCH HAIL
08/05/97   GRAND FORKS

0510 PM    4W INKSTER               ND     0.75 INCH HAIL
08/05/97   GRAND FORKS

Local storm report, Aug 5, 6:24 PM CDT, 2 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
620 PM CDT TUE AUG 5 1997

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

0315 PM    BACKOO                   ND     0.75 INCH HAIL
08/05/97   PEMBINA                         TREE DAMAGE

0443 PM    GRAND FORKS              ND     0.75 INCH HAIL
08/05/97   GRAND FORKS

0454 PM    INSKTER                  ND     0.75 INCH HAIL
08/05/97   GRAND FORKS

0510 PM    4W INKSTER               ND     0.75 INCH HAIL
08/05/97   GRAND FORKS

Local storm report, Aug 5, 7:13 PM CDT, 1 hour 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
715 PM CDT TUE AUG 5 1997

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

0640 PM    PAGE                     ND     THUNDERSTORM WIND
08/05/97   CASS                            TREES DOWN AND GARAGE
                                           COLLAPSED

Local storm report, Aug 5, 7:15 PM CDT, 1 hour 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
715 PM CDT TUE AUG 5 1997

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

0640 PM    PAGE                     ND     THUNDERSTORM WIND
08/05/97   CASS                            TREES DOWN AND GARAGE
                                           COLLAPSED

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 7:18 PM CDT	Tornado Warning	FGF	Cass	42 min
Aug 5, 7:41 PM CDT	Tornado Warning	FGF	Ransom, Richland	34 min
Aug 5, 8:10 PM CDT	Severe Thunderstorm Warning	FGF	Richland	35 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.