Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 203, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2001, 5:59 AM CDT for Becker County, Otter Tail County, Minnesota. It was in force for 46 min. 1 report 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
- Jul 21, 2001, 5:59 AM CDT (10:59 UTC)
- Expired
- Jul 21, 2001, 6:45 AM CDT
- In force
- 46 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Becker County, MN, Otter Tail County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 156 km from the middle of the area, began a volume at 11:00 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 |
|---|---|---|---|
| Jul 21, 6:15 AM CDT | Hail 2 | New York Mills, 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 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
Minneapolis, MN (KMPX), launched 00:00Z, 11.0 hours before the alert went out and 260 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.
- Mixed-layer CAPE
- 1957 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 820 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 211101 SVRFAR MNC005-111-211145- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 559 AM CDT SAT JUL 21 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BECKER COUNTY IN NORTHWEST MINNESOTA AND OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA. * UNTIL 645 AM CDT. * AT 555 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 23 MILES NORTHEAST OF DETROIT LAKES TO 20 MILES EAST OF DETROIT LAKES TO 25 MILES NORTHEAST OF FERGUS FALLS TO 8 MILES SOUTH OF FERGUS FALLS...MOVEMENT WAS TO THE SOUTHEAST AT 35 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... OTTERTAIL AT 600 AM CDT... FERGUS FALLS AT 605 AM CDT... BUTLER AT 605 AM CDT... NEW YORK MILLS AT 610 AM CDT AND MIDWAY AT 615 AM CDT. THIS STORM HAS A HISTORY OF 60 MPH WINDS 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 36 minutes earlier.
Area forecast discussion, Jul 21, 3:23 AM CDT, 2 hours 36 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, 34 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
NNNNSpecial weather statement, Jul 21, 5:53 AM CDT, 6 minutes before
MNZ001>004-007>009-013>017-022>024-027>032-040-NDZ006>008-014>016- 024-026>030-038-039-049-052>054-211140- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 553 AM CDT SAT JUL 21 2001 ...PORTIONS OF SEVERE THUNDERSTORM WATCH HAS EITHER BEEN CANCELLED OR EXPIRED... THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED OR EXPIRED FOR THE FOLLOWING COUNTIES IN NORTH DAKOTA: TOWNER...BENSON...CAVALIER... RAMSEY...EDDY...PEMBINA...WALSH...NELSON...GRAND FORKS...GRIGGS... STEELE...TRAIL AND BARNES. IN MINNESOTA THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES: KITTSON... MARSHALL...BELTRAMI...PENNINGTON...RED LAKE...POLK. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 AM CDT FOR THE FOLLOWING AREAS IN NORTH DAKOTA: CASS...RANSOM...RICHLAND AND SARGENT COUNTIES. IN MINNESOTA THE WATCH REMAINS IN EFFECT UNTIL 9 AM CDT FOR THE FOLLOWING COUNTIES: NORMAN...MAHNOMEN...SOUTHERN CLEARWATER...CLAY...BECKER...HUBBARD...WILKIN...OTTER TAIL...WADENA AND GRANT COUNTIES. DISCUSSION...LINE OF SEVERE THUNDERSTORMS CONTINUES TO MOVE TO THE EAST SOUTHEAST FROM CLEAR WATER TO WILKIN COUNTIES PRODUCING MARGINAL SEVERE WIND GUSTS TO 60 MPH. THIS SHOULD CONTINUE FOR THE NEXT HOUR OR TWO BEFORE EXITING THE AREA. BRAZZELL
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 | Grant | 58 min |
| Jul 21, 5:47 AM CDT | Severe Thunderstorm Warning | FGF | Hubbard, Wadena | 58 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2001Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.