Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 197, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 2001, 4:53 AM CDT for Becker County, Mahnomen County, Minnesota. It was in force for 67 min. 3 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
- Jul 21, 2001, 4:53 AM CDT (09:53 UTC)
- Expired
- Jul 21, 2001, 6:00 AM CDT
- In force
- 67 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties
Counties Becker County, MN, Mahnomen County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 127 km from the middle of the area, began a volume at 09:54 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, 5:45 AM CDT | Thunderstorm Wind 52 E | Detroit Lakes, MN | The Soo Pass Ranch was holding its Spirit Fest concert south of Detroit Lakes. The strong wind knocked over chairs, vendor booths, and sound equipment. |
| Jul 21, 5:47 AM CDT | Thunderstorm Wind 52 E | Cormorant, MN | |
| Jul 21, 5:50 AM CDT | Thunderstorm Wind 52 E | Detroit Lakes, 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
International Fa, MN (KINL), launched 00:00Z, 9.9 hours before the alert went out and 243 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
- 1883 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1266 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 272 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 9.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 210954 SVRFAR MNC005-087-111-211100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 453 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... MAHNOMEN COUNTY IN NORTHWEST MINNESOTA AND OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA. INCLUDING THE CITIES OF FERGUS FALLS AND DETROIT LAKES... * UNTIL 600 AM CDT. * AT 449 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 36 MILES NORTHEAST OF FARGO TO 22 MILES NORTHEAST OF FARGO TO 19 MILES SOUTHEAST OF FARGO TO 13 MILES WEST OF WAHPETON...MOVEMENT WAS TO THE EAST AT 30 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... LAKE PARK AT 530 AM CDT... MAHNOMEN AT 535 AM CDT... WAUBUN AT 540 AM CDT AND OGEMA AT 545 AM CDT. DETROIT LAKES 545 AM CDT. FERGUS FALLS 550 AM CDT. THIS STORM IS CAPABLE OF 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 500 AM CDT SATURDAY MORNING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA. A SEVERE THUNDERSTORM WATCH ALSO 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, 1 hour 30 minutes earlier.
Area forecast discussion, Jul 21, 3:23 AM CDT, 1 hour 30 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
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 | 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 |
| Jul 21, 5:59 AM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail | 46 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.