Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 215, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 30, 2001, 11:33 AM CDT for Becker County, Otter Tail County, Minnesota. It was in force for 42 min. 3 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jul 30, 2001, 11:33 AM CDT (16:33 UTC)
- Expired
- Jul 30, 2001, 12:15 PM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Becker County, MN, Otter Tail County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 142 km from the middle of the area, began a volume at 16:36 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 30, 11:56 AM CDT | Hail 0.88 | Detroit Lakes, MN | |
| Jul 30, 11:56 AM CDT | Thunderstorm Wind | Detroit Lakes, MN | Strong winds knocked tree branches onto powerlines and blew over a portable greenhouse. A metal roof was torn off a building. |
| Jul 30, 11:56 AM CDT | Thunderstorm Wind | Detroit Lakes, MN | Strong winds hit the Soo Pass Ranch, which was preparing for its country music festival. Three travel trailers were flipped over, one completely wrecked. Signs, fence posts, and a booth were damaged. One tree fell on a large camper. Two boats were flipper |
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 nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 4.6 hours before the alert went out and 273 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
- 3565 J/kg
- Mixed-layer CIN
- -205 J/kg
- Mixed-layer LCL
- 778 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 301633 SVRFAR MNC005-111-301715- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 1133 AM CDT MON JUL 30 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN BECKER COUNTY IN NORTHWEST MINNESOTA AND NORTHERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA. INCLUDING THE CITY OF DETROIT LAKES... * UNTIL 1215 PM CDT. * AT 1131 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTHWEST OF ROCHERT...OR ABOUT 4 MILES EAST OF DETROIT LAKES...MOVEMENT WAS TO THE EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ROCHERT AT 1135 AM... HEIGHT OF LAND LAKE AT 1140 AM... TOAD LAKE AT 1150 AM AND SNELLMAN AT 1155 AM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4696 9610 4640 9615 4645 9535 4699 9543 $$ 04 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 30, 10:25 AM CDT, 1 hour 8 minutes earlier.
Area forecast discussion, Jul 30, 10:25 AM CDT, 1 hour 8 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 1025 AM CDT MON JUL 30 2001 CONVECTION CONT TO EXPAND ACROSS THE AREA THIS AM IN RESPONSE TO WARM FRONT LIFTING THRU SE ND AND W CENTRAL MN. NEW MESOETA PROGS ACTIVITY TO GRADUALLY DIMINISH LATER THIS MORNING AS INSTABILITY DECREASES WHILE CONVECTIVE INHIBITION ON THE INCREASE. THIS REASONABLE AS UPPER AIR ANALYSIS SHOWS WEAK 7H WAVE MOVING THRU IN SW FLOW WHILE WARMER AIR PUSHES IN AT THIS HEIGHT TO HELP CAP OFF CONVECTION OVER THE SRN ZONES. HOWEVER...NRN VALLEY AND POINTS E TO STAY ACTIVE THRU MUCH OF THE AFTN AS THIS AREA TO STAY UNSTABLE...ESPECIALLY ALONG STALLED BOUNDARY EXTENDING ALONG THE RED RIVER VALLEY. WL UP PCPN POTENTIAL OVER MUCH OF THE REGION WITH UPDATE. WL NOT MAKE OTHER CHANGES LATER AS TIME PERMITS. .FGF...NONE. RJT
In the hours before
Special weather statement, Jul 30, 7:06 AM CDT, 4 hours 27 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-301400- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 706 AM CDT MON JUL 30 2001 ...SLIGHT RISK OF SEVERE THUNDERSTORMS LATER THIS EVENING INTO EARLY TUESDAY... SYNOPSIS...MOIST UNSTABLE AIR REMAINS IN PLACE ACROSS THE RED RIVER VALLEY INTO NORTHWEST MINNESOTA. AS THE DAY PROGRESSES...THIS MOIST UNSTABLE AIR WILL BEGIN TO WORK ITS WAY BACK TO THE WEST. A FRONTAL BOUNDARY WILL ALSO REFORM ACROSS CENTRAL NORTH DAKOTA DURING THE DAY TODAY. TEMPERATURES WILL ONCE AGAIN WARM NICELY BY AFTERNOON... HELPING TO PROVIDE ADDITIONAL FUEL FOR THUNDERSTORM DEVELOPMENT. AREA OF CONCERN...A SLIGHT RISK OF SEVERE WEATHER IS EXPECTED ACROSS ALL OF EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA. TIME...GREATEST RISK IS EXPECTED AFTER 9 PM CONTINUING INTO THE EARLY MORNING HOURS. TYPE OF HAZARD...HAIL WILL BE THE MAIN THREAT ALTHOUGH SOME LOCALIZED HEAVY RAIN IS ALSO POSSIBLE. GODON
Local storm report, Jul 30, 8:45 AM CDT, 2 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
845 AM CDT MON JUL 30 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0745 AM 4 NE CRETE ND 1 INCH HAIL
07/30/01 SARGENT
0750 AM ENGLEVALE ND .75 INCH HAIL
07/30/01 RANSOMThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 10:11 PM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk, Red Lake | 49 min |
| Jul 30, 10:07 AM CDT | Severe Thunderstorm Warning | FGF | Clay | 38 min |
| Jul 30, 11:17 AM CDT | Severe Thunderstorm Warning | FGF | Polk | 43 min |
| Jul 30, 12:20 PM CDT | Severe Thunderstorm Warning | FGF | Wadena | 25 min |
| Jul 30, 12:25 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 50 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.