Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 282, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 8, 2001, 9:10 PM CDT for Clearwater County, Mahnomen County, Polk County, Minnesota. It was in force for 65 min. 14 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
- Aug 8, 2001, 9:10 PM CDT (02:10 UTC)
- Expired
- Aug 8, 2001, 10:15 PM CDT
- In force
- 65 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Clearwater County, MN, Mahnomen County, MN, Polk County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 132 km from the middle of the area, began a volume at 02:10 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 |
|---|---|---|---|
| Aug 8, 9:15 PM CDT | Thunderstorm Wind | Brooks, MN | 6 large grain bins were destroyed. |
| Aug 8, 9:35 PM CDT | Thunderstorm Wind | Erskine, MN | Trees, powerlines, and signs were destroyed by the strong wind. A greenhouse and a storage shed were demolished. A trailer home was flipped over and several roofs sustained damage. The town restricted water use. |
| Aug 8, 9:47 PM CDT | Thunderstorm Wind 52 M | Mahnomen, MN | A 60 mph wind gust was measured by a Minnesota DOT RWIS site. |
| Aug 8, 9:55 PM CDT | Thunderstorm Wind | Oklee, MN | The roof was torn off a new apartment building and blown into a field. Many trees were blown down, some into homes and powerlines. The roof was torn off of one mobile home while another was flipped over. 13 grain bins were damaged, 6 completely destroyed. |
| Aug 8, 9:55 PM CDT | Thunderstorm Wind | Oklee, MN | 8 grain bins were damaged and a semi trailer was overturned. |
| Aug 8, 9:58 PM CDT | Thunderstorm Wind 52 M | Fosston Muni Arpt, MN | |
| Aug 8, 9:58 PM CDT | Thunderstorm Wind | Trail, MN | Many trees were blown down. |
| Aug 8, 9:58 PM CDT | Thunderstorm Wind | Trail, MN | A barn was lifted off its foundation and carried 20 feet, which destroyed it. The roof and walls of a mobile home were torn apart and blown over a half a mile away. A car was also heavily damaged. |
| Aug 8, 10:05 PM CDT | Tornado F1 | Gully, MN | An auto repair shop had its roof torn off. Many trees were uprooted, falling on signs, powerlines, homes, and garages. Several grain bins were destroyed. |
| Aug 8, 10:05 PM CDT | Thunderstorm Wind | Gully, MN | 36 oak and ash trees were uprooted. |
| Aug 8, 10:07 PM CDT | Thunderstorm Wind | Gonvick, MN | Trees were blown down. |
| Aug 8, 10:08 PM CDT | Thunderstorm Wind | Gonvick, MN | A large tree was blown down and roof damage was reported to homes and businesses. |
| Aug 8, 10:10 PM CDT | Tornado F0 | Gonvick, MN | Numerous trees were blown down. |
| Aug 8, 10:25 PM CDT | Thunderstorm Wind | Clearbrook, MN | Trees were blown down. |
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 |
|---|---|---|---|
| Aug 8, 6:00 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 2.2 hours before the alert went out and 189 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
- 1405 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1530 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- -17 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
001 WUUS53 KFGF 090212 SVRFAR MNC007-029-087-089-113-119-125-090315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 910 PM CDT WED AUG 8 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN BELTRAMI COUNTY IN NORTH CENTRAL MINNESOTA... CLEARWATER COUNTY IN NORTHWEST MINNESOTA... MAHNOMEN COUNTY IN NORTHWEST MINNESOTA... EASTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA... EASTERN PENNINGTON COUNTY IN NORTHWEST MINNESOTA... EASTERN POLK COUNTY IN NORTHWEST MINNESOTA AND EASTERN RED LAKE COUNTY IN NORTHWEST MINNESOTA. * UNTIL 1015 PM CDT. * AT 905 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 23 MILES NORTHEAST OF THIEF RIVER FALLS TO 39 MILES SOUTH OF THIEF RIVER FALLS...MOVEMENT WAS TO THE EAST AT 45 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... BROOKS AT 915 PM... ERSKINE AND MAPLE LAKE AT 920 PM... GULLY AND GOODRIDGE AT 925 PM... BAGLEY AT 940 PM... MAHNOMEN AT 940 PM. * THIS STORM PRODUCED 101 MPH WINDS IN GRAND FORKS AT 826 PM CDT AND 74 MPH WIND GUST AT CROOKSTON AT 856 PM CDT. * THIS IS A DANGEROUS SITUATION. TAKE COVER NOW REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM WEDNESDAY EVENING FOR NORTHWEST MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4839 9610 4725 9603 4727 9535 4828 9469 $$ DTR/06 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 Aug 8, 2:02 PM CDT, 7 hours 8 minutes earlier.
Area forecast discussion, Aug 8, 2:02 PM CDT, 7 hours 8 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 202 PM CDT WED AUG 8 2001 ...MAIN FORECAST CHALLENGE THIS PACKAGE IS CONVECTION WITH FROPA AND THEN EXTENT OF COOLDOWN THEREAFTER... .CURRENT OBSERVATIONAL OVERVIEW... 18Z MSAS ANALYSIS DEPICTED DOUBLE BARREL LOW STRUCTURE FROM EXTREME SOUTHEAST MB PROVINCE TO NORTH CENTRAL SOUTH DAKOTA. SCATTERED CONVECTION FIRING AHEAD OF FEATURE AND ASSOCIATED TROUGH FROM EASTERN NORTH DAKOTA INTO MINNESOTA IN CONJUNCTION WITH STRONG SURFACE-850MB WAA PUNCH...PER KMVX RADAR. FURTHER UPSTREAM PARENT COLD FRONT WAS EVIDENT OVER NORTHWEST NORTH DAKOTA WITH GOOD PRESSURE RISES NOTED IN WAKE OF BOUNDARY OVER MONTANA AND SASK PROVINCE. .FORECAST DETAILS... THE GOOD NEWS IS MUCH WELCOME AND PROLONGED RELIEF ON THE WAY IN THE FORM OF A STRONG COLD FRONT. HOWEVER...INITIALLY WE WILL HAVE TO THE PAY THE PIPER IN THE PRICE OF SEVERE STORM THREAT THIS AFTN/EVE AS INCREASING MOISTURE FLUX CONVERGENCE AND MID-LEVEL COOLING ENHANCES CONVECTIVE POTENTIAL IN CONJUNCTION WITH FROPA. SEE SPC SWODY1 FOR FURTHER DETAILS. EXPECT POP THREAT TO END FROM NW TO SE TONIGHT. ALIGNED FLOW AND TIGHTENING PRESSURE GRADIENT SHOULD LEAD TO ACTIVE NORTHWEST FLOW LATE TONIGHT AND THURSDAY AS MUCH COOLER AND LESS HUMID AIR ADVECTS INTO THE REGION. LINGERING CYCLONIC FLOW COUPLED WITH GOOD THICKNESS COOLING PROBABLY WILL LEAD TO DIURNAL DRIVEN BROKEN CU DECK FORMATION ON THURSDAY. THESE FACTORS SHOULD RESULT IN THE MERCURY STRUGGLING TO RISE MUCH OUT OF THE LOW TO MID 70S. WILL MAKE GAME TIME DECISION ON WHETHER TO LINGER HEAT ADVISORY THIS EVENING ACROSS SOUTHEAST ZONES. .EXTENDED...UPPER LOW DROPS SOUTHEAST INTO LOWER HUDSON BAY BY EARLY MONDAY WITH NORTHERN PLAINS UNDER NORTHWEST FLOW REGIME. PATTERN SHIFTS A BIT TOWARD THE END OF THE PERIOD AS ANOTHER LOW PROGGED TO DROP INTO THE PACIFIC NW WITH UPPER RIDGE STARTING TO REBUILD OVER THE CENTRAL US. SEVERAL WEAK WAVES IN THE NORTHWEST FLOW SAT NIGHT AND SUN MAY BRING A FEW SHOWERS. MRF HINTING AT OVERNIGHT CONVECTION MON NIGHT/EARLY TUE...BUT THIS IS A BIG CHANGE FROM YESTERDAY AND WILL LEAVE DRY FOR NOW. MEX/FMR NUMBERS SHOWING BELOW NORMAL TEMPS EARLY TRENDING BACK TOWARD NORMAL LATE IN THE PERIOD WHICH LOOKS REASONABLE. .FGF...HEAT ADVISORY THIS EVENING ALONG AND SOUTH OF A FAR-PKD LINE. BERG/GODON
In the hours before
Local storm report, Aug 8, 7:22 PM CDT, 1 hour 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
722 PM CDT WED AUG 08 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0245 PM 6 NW PONSFORD MN 60 MPH TSTM GUST
08/08/01 BECKER
0339 PM AKELEY MN 62 MPH TSTM GUST
08/08/01 HUBBARD MEASURED MN DOT
ROADSIDE SITE
0340 PM PARK RAPIDS MN WIND DAMAGE
08/08/01 HUBBARD NUMEROUS TREES DOWN
0600 PM 2 SW MADDOCK ND 1 INCH HAIL
08/08/01 BENSON
0620 PM 4 SW ESMOND ND 1 INCH HAIL
08/08/01 BENSON
0620 PM 9 NW MADDOCK ND .88 INCH HAIL
08/08/01 BENSON 4 INCH DIAMETER TREE
BRANCHES ALSO DOWN
0623 PM 5 NE MADDOCK ND .75 INCH HAIL
08/08/01 BENSON 4 INCH DIAMETER TREE
BRANCHES ALSO DOWN
0640 PM 4 NW OBERON ND WIND DAMAGE
08/08/01 BENSON 2 TREES BLOWN DOWN
NNNNThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:29 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 46 min |
| Aug 8, 8:18 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall, Pennington, Polk, Roseau | 57 min |
| Aug 8, 8:18 PM CDT | Severe Thunderstorm Warning | FGF | Red Lake | 57 min |
| Aug 8, 8:47 PM CDT | Flash Flood Warning | FGF | Polk | 6 hr |
| Aug 8, 9:03 PM CDT | Severe Thunderstorm Warning | FGF | Norman | 42 min |
| Aug 8, 9:10 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Marshall, Pennington, Red Lake | 65 min |
| Aug 8, 9:18 PM CDT | Severe Thunderstorm Warning | FGF | Lake of the Woods | 42 min |
| Aug 8, 9:26 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 64 min |
| Aug 8, 9:40 PM CDT | Flash Flood Warning | FGF | Norman | 6 hr |
| Aug 8, 9:46 PM CDT | Severe Thunderstorm Warning | FGF | Wilkin | 44 min |
| Aug 8, 9:47 PM CDT | Tornado Warning | FGF | Clearwater, Polk | 28 min |
| Aug 8, 10:00 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Hubbard | 60 min |
| Aug 8, 10:13 PM CDT | Severe Thunderstorm Warning | FGF | Clearwater, Mahnomen | 47 min |
| Aug 8, 10:37 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail, Wadena | 53 min |
| Aug 8, 11:00 PM CDT | Severe Thunderstorm Warning | FGF | Hubbard | 30 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.