Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 201, NWS Grand Forks, ND

July 21, 2001Grant County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2001, 5:47 AM CDT for Grant County, Minnesota. It was in force for 58 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: Jul 21, 2001, 5:47 AM CDT (10:47 UTC)
Expired: Jul 21, 2001, 6:45 AM CDT
In force: 58 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 10:51 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
Jul 21, 3:45 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 10.8 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: 2936 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1232 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 211049
SVRFAR

MNC051-057-159-211145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
547 AM CDT SAT JUL 21 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  WADENA COUNTY IN CENTRAL MINNESOTA...
  HUBBARD COUNTY IN NORTH CENTRAL MINNESOTA AND 
  GRANT COUNTY IN WEST CENTRAL MINNESOTA.

* UNTIL 645 AM CDT.

* AT 545 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING
  FROM 29 MILES EAST OF DETROIT LAKES TO 28 MILES SOUTHEAST OF
  DETROIT LAKES TO 27 MILES EAST OF FERGUS FALLS TO 15 MILES SOUTH OF
  FERGUS FALLS...MOVEMENT WAS TO THE SOUTHEAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...

  WENDELL AT 550 AM CDT...
  ELBOW LAKE AT 555 AM CDT...
  PARK RAPIDS AT 600 AM CDT...
  SEBEKA AT 600 AM CDT...
  WADENA AT 605 AM CDT AND
  VERNDALE AT 605 AM CDT.

THIS STORM IS CAPABLE OF PRODUCING WINDS UP TO 70 MPH.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 AM CDT
SATURDAY MORNING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH
DAKOTA.


$$
DJK/RD

NNNN

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 Jul 21, 3:23 AM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, Jul 21, 3:23 AM CDT, 2 hours 24 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
315 AM SAT JUL 21 2001

DISCUSSION IS LATE AND BRIEF DUE TO DERECHO MOVING THROUGH THE CWA
AT THIS TIME.

.CURRENT/MODEL DISCUSSION...DERECHO CURRENTLY MOVING THROUGH THE
CWFA WITH NUMEROUS WARNINGS. LIKE THE ETA MODEL FOR THE DETAILS.

.SHORT TERM...DERECHO WILL CONTINUE TO PROPAGATE TO THE EAST THROUGH
THE EARLY MORNING. AFTER THIS MOVES THROUGH...THUNDERSTORMS WILL END
ACROSS THE CWFA THIS MORNING...THEN RELSULT IN PARTLY CLOUDY SKIES
FOR THE REMAINDER OF THE DAY. COULD BE SOME WIDELY SCATTERED
REDEVELOPMENT IN THE AFTERNOON...ESPECIALLY TOWARDS DEVILS LAKE.

.LONG TERM...A SIMILAR SITUATION SETTING UP FOR TONIGHT AS PREVIOUS
NIGHT. WITH FAVORABLE MID LEVEL FLOW WOULD EXPECT ANOTHER BOW ECHO
TO RUN ACROSS THE CWA. THINGS MAY BEGIN TO SETTLE DOWN AFTER SUNDAY
AS THE PATTERN TAKES ON A MORE BENIGN PATTERN. WILL NOT GO AHEAD AND
ISSUE A FLASH FLOOD WATCH AT THIS TIME...WILL LET NEXT SHIFT
EVALUATE THIS SITUATION LATER TODAY.

.FGF...NONE.

BRAZZELL

In the hours before

Local storm report, Jul 21, 5:25 AM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
525 AM CDT SAT JUL 21 2001

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

0221 AM    5 W NEW ROCKFORD          ND   70 MPH TSTM GUST
07/21/01   EDDY

0240 AM    3 E OBERON                ND   .75 INCH HAIL
07/21/01   BENSON

0345 AM    FINLEY                    ND   60 MPH TSTM GUST
07/21/01   STEELE

0437 AM    6 W ADA                   MN   64 MPH TSTM GUST
07/21/01   NORMAN                         RWIS SITE REPORT

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 4:17 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Wilkin	58 min
Jul 21, 4:17 AM CDT	Severe Thunderstorm Warning	FGF	Norman	58 min
Jul 21, 4:53 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Mahnomen	67 min
Jul 21, 4:53 AM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	67 min
Jul 21, 5:16 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	44 min
Jul 21, 5:16 AM CDT	Severe Thunderstorm Warning	FGF	Wilkin	44 min
Jul 21, 5:47 AM CDT	Severe Thunderstorm Warning	FGF	Hubbard, Wadena	58 min
Jul 21, 5:59 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	46 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2001 Every severe thunderstorm warning in 2001

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.