Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 33, NWS Grand Forks, ND

June 21, 1997Lake of the Woods County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 21, 1997, 6:51 PM CDT for Lake of the Woods County, Minnesota. It was in force for 39 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: Jun 21, 1997, 6:51 PM CDT (23:51 UTC)
Expired: Jun 21, 1997, 7:30 PM CDT
In force: 39 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Lake of the Woods County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 227 km from the middle of the area, began a volume at 23:53 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 nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 11.9 hours before the alert went out and 120 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1420 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 117 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.

401 
WUUS1 KFAR 212349 RRA
SVRFAR
MNC077-220030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
651 PM CDT SAT JUN 21 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  730 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL MINNESOTA
 
   ...LAKE OF THE WOODS COUNTY
 
AT 645 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 10
MILES SOUTHEAST OF WILLIAMS...OR ABOUT 40 MILES SOUTHEAST OF ROSEAU.
THIS STORM WAS MOVING SOUTHEAST AT 30 MPH. A PUBLIC REPORT OF A FUNNEL
CLOUD WAS RECEIVED FROM THAT AREA. THE CITY OF BAUDETTE IS IN THE PATH
OF THIS THUNDERSTORM.
 
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 21, 3:02 PM CDT, 3 hours 49 minutes earlier.

Area forecast discussion, Jun 21, 3:02 PM CDT, 3 hours 49 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
300 PM CDT SAT JUN 21 1997

FIRST PERIOD DISCUSSION...UPR LVL RIDGE FCST TO BUILD ACRS THE
PLNS OVRNT. IN RESPONSE...LLJ SHUD CRANK UP TNGT AND WOULD XPCT
STRMS TO DEVELOP IN WRN ND. WATER VAP LOOP SHOWING RIDGE
BUILDING IN WRN STATES AND SLIDING E. WATER VAPOR ALSO SHOWS
SHORT WVS IN WRN ND AND ERN SD MOVG E. PRECIP BEGINNING TO BREAK
OUT IN NW CNTYS ON 88D.  WL NEED TO ADD CHC TSTRMS NRN HALF OF VLLY
THIS EVE AND SRN VLLY AFT MIDNT.  MOS SEEMS REASONABLE FOR LOWS
BUT WITH WAA TNGT MAY BUMP UP A CAT. DVL, ROX, BDE,BJI SHUD BE IN THE
MID 50S...UPR 50S IN GFK, FAR, TVF,FSE, DTL...ARND 60 IN FFM.

HOPPES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 6:15 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods	30 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.