Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 243, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 31, 2001, 5:16 PM CDT for Lake of the Woods County, Roseau County, Minnesota. It was in force for 44 min. 1 report 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 31, 2001, 5:16 PM CDT (22:16 UTC)
- Expired
- Jul 31, 2001, 6:00 PM CDT
- In force
- 44 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
The radar
The Fargo/Grand Forks radar (KMVX), 184 km from the middle of the area, began a volume at 22:15 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 31, 5:30 PM CDT | Hail 0.88 | Skime, MN | The hail damaged the awnings on a home. |
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 31, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 10.3 hours before the alert went out and 163 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
- 2851 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 312217 SVRFAR MNC077-135-312300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 516 PM CDT TUE JUL 31 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN LAKE OF THE WOODS COUNTY IN NORTH CENTRAL MINNESOTA AND EASTERN ROSEAU COUNTY IN NORTHWEST MINNESOTA. * UNTIL 600 PM CDT. * AT 515 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 2 MILES EAST OF TORFIN...OR ABOUT 17 MILES SOUTH OF ROSEAU...MOVEMENT WAS TO THE EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PENCER AT 520 PM AND HAYES LAKE STATE PARK AT 530 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM TUESDAY EVENING FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. LAT...LON 4868 9583 4857 9581 4855 9503 4880 9508 $$ 7 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 31, 3:25 PM CDT, 1 hour 51 minutes earlier.
Area forecast discussion, Jul 31, 3:25 PM CDT, 1 hour 51 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 325 PM CDT TUE JUL 31 2001 FORECAST CHALLENGE FOR TONIGHT AND WED IS PCPN. CURRENT SATELLITE IMAGERY HAS ALL BUT SE CWFA CLOUDY. KMVX HAS SVR TSRA OVER N CWFA...WITH OTHER TSRA TRYING TO GET ORGANIZED IN FRONTAL ZONE IN E ND. LATEST MSAS SFC PRESSURE ANALYSIS HAS LOW PRESSURE CENTERED NEAR MBG...WITH FRONT EXTENDING BET JMS-FAR TO GFK-DVL TO HCO. WHEN COMPARING INITIALIZATION CONDITIONS TO MODELS...ETA INITIALIZED BEST...BUT USED COMPROMISE SOLUTION AS NO MODEL HANDING SCENARIO ENTIRELY. MODEL SOUNDINGS QUITE SATURATED WITH PW'S REMAINING AROUND 2.0 INCHES OVER CWFA THROUGH THE NIGHT. IN ADDITION...SFC LOW TRACKS THROUGH CWFA OVERNIGHT...WITH GOOD 850 MB LLJ...NICE THETA-E RIDGE...AS WELL AS A 700MB TROF AND UPPER LEVEL SHORTWAVE...ALL SETTING SITES ON CWFA TO KEEP HEAVY RAIN AND SVR POTENTIAL TONIGHT. WITH FFG VALUES FOR MAJORITY OF COUNTIES UNDER 2 INCHES...WILL KEEP FFA OUT FOR CWFA TONIGHT...BUT WILL LET NIGHT SHIFT DETERMINE IF E CWFA WILL NEED TO EXTEND FFA INTO WED. THANKS TO BIS AND DLH FOR COORD. FORECAST CHALLENGE FOR WED NIGHT AND THU IS TEMPS. STRONG CAA AHEAD OF SFC HIGH WILL BRING BREEZY CONDITIONS TO CWFA ON WED. HIGH BUILDS INTO CWFA BY 06Z THU...WITH GOOD 850 MB Q-VECTOR DIVERGENCE AND WINDS GOING LIGHT AND VARIABLE...EXPECT TEMPS TO FALL INTO 55 TO 65 DEGREE RANGE. THEN ON THU...SFC HIGH MOVES E WITH SE-S RETURN FLOW SETTING UP...ALLOWING TEMPS TO BUMP BACK INTO THE LOW TO MIDDLE 80S. EXTENDED RANGE MODELS IN REASONABLY GOOD AGREEMENT IN SFC AND MID LEVEL FEATURES THROUGH PERIOD IN BUILDING UPPER RIDGE INTO FORECAST AREA. MODELS CONSISTENT IN SHOWING AREA OF LOW PRESSURE OVR DAKOTAS WHICH MAY BRING CHC OF MAINLY NIGHTTIME TSRA THIS WEEKEND. FOLLOWING THIS AN UPPER RIDGE BUILDS...SO WARM TEMPS AT 700MB MAY SQUELCH ANY CHANCE FOR CONVECTION. FOR NOW WILL KEEP FCST DRY FOR EARLY NEXT WEEK BECAUSE OF POTENTIAL CAPPING. AT OR ABOVE AVERAGE TEMPS TEMPS TO CONTINUE WITH WARMEST TEMPS FIRST PART OF NEXT WEEK. .FGF...FLASH FLOOD WATCH FULL CWFA TONIGHT. NG/AMV
In the hours before
Local storm report, Jul 31, 1:53 PM CDT, 3 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
153 PM CDT TUE JUL 31 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0350 AM 3 E BUXTON ND WIND DAMAGE
07/31/01 TRAILL LARGE TREE DOWN
0357 AM HALSTAD MN 67 MPH TSTM GUST
07/31/01 NORMAN
0417 AM HAWLEY MN .88 INCH HAIL
07/31/01 CLAY
0425 AM GENTILLY MN WIND DAMAGE
07/31/01 POLK 4-5 INCH DIAMETER LIMBS
DOWN
0425 AM CROOKSTON MN WIND DAMAGE
07/31/01 POLK 4-5 INCH DIAMETER LIMBS
DOWN
0515 AM 1 NE SKIME MN WIND DAMAGE
07/31/01 ROSEAU LARGE TREES DOWN
0515 AM 4 NW GRYGLA MN WIND DAMAGE
07/31/01 MARSHALL LARGE TREES DOWN
0600 AM 1 W CLEMENTSON MN WIND DAMAGE
07/31/01 LAKE OF THE WOODS ROOF BLOWN OFF TRAILER
HOME, 20 INCH DIAMETER
TREES DOWN
1000 AM COOPERSTOWN ND WIND DAMAGE
07/31/01 GRIGGS 6 TO 8 INCH BRANCHES DOWN
1055 AM COOPERSTOWN ND FLOODING
07/31/01 GRIGGS CITY PARK FLOODED, STREET
FLOODING 2 FOOT DEEP
DOWNTOWN
1100 AM 15 NE FINLEY ND WIND DAMAGE
07/31/01 STEELE 4 INCH BRANCHES DOWN
1108 AM HATTON ND WIND DAMAGE
07/31/01 TRAILL 5 INCH BRANCHES DOWN
1130 AM GRAND FORKS ND WIND DAMAGE
07/31/01 GRAND FORKS 12 INCH DIAMETER TREES
DOWN
1130 AM 7 SW GRAND FORKS ND .75 INCH HAIL
07/31/01 GRAND FORKS
1132 AM FISHER MN WIND DAMAGE
07/31/01 POLK POWER POLES BLOWN DOWN
1150 AM 3 S ANGUS MN WIND DAMAGE
07/31/01 POLK NUMEROUS TREES DOWN
1215 PM 1 SW WYLIE MN .75 INCH HAIL
07/31/01 RED LAKE
1220 PM THIEF RIVER FALLS MN 72 MPH TSTM GUST
07/31/01 PENNINGTON NUMEROUS LARGE TREES DOWN,
DAVIS WIND SENSOR REPORT
1223 PM THIEF RIVER FALLS MN .75 INCH HAIL
07/31/01 PENNINGTON
1235 PM 4 W MAVIE MN WIND DAMAGE
07/31/01 PENNINGTON SEVERAL LARGE LIMBS DOWN
1245 PM 15 SW GRYGLA MN .75 INCH HAIL
07/31/01 PENNINGTON ALONG COUNTY LINE
1245 PM 2 NE MAVIE MN .75 INCH HAIL
07/31/01 PENNINGTON ALONG COUNTY LINE
1245 PM 15 SW GRYGLA MN .75 INCH HAIL
07/31/01 MARSHALL ALONG COUNTY LINELocal storm report, Jul 31, 5:15 PM CDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
515 PM CDT TUE JUL 31 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0425 AM 12 ESE ADA MN WIND DAMAGE
07/31/01 NORMAN LARGE BRANCHES DOWN IN
TWIN VALLEY
0445 AM HALSTAD MN WIND DAMAGE
07/31/01 NORMAN DOWNED POWER POLES
0455 AM 1 E GULLY MN WIND DAMAGE
07/31/01 POLK TREES DOWN ALONG HWY 92
0230 PM 5 NW GRYGLA MN .75 INCH HAIL
07/31/01 MARSHALL HAIL FOR 5 MINUTESThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 4:11 AM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk | 34 min |
| Jul 31, 4:11 AM CDT | Severe Thunderstorm Warning | FGF | Pennington, Red Lake | 34 min |
| Jul 31, 4:11 AM CDT | Severe Thunderstorm Warning | FGF | Marshall | 34 min |
| Jul 31, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk, Red Lake | 28 min |
| Jul 31, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Kittson, Marshall, Roseau | 28 min |
| Jul 31, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Clearwater | 28 min |
| Jul 31, 5:37 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods | 38 min |
| Jul 31, 11:21 AM CDT | Severe Thunderstorm Warning | FGF | Polk | 39 min |
| Jul 31, 11:57 AM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk, Red Lake | 48 min |
| Jul 31, 12:11 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 64 min |
| Jul 31, 12:43 PM CDT | Severe Thunderstorm Warning | FGF | Pennington | 32 min |
| Jul 31, 12:46 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods | 59 min |
| Jul 31, 1:20 PM CDT | Severe Thunderstorm Warning | FGF | Pennington, Polk | 25 min |
| Jul 31, 1:35 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 40 min |
| Jul 31, 1:44 PM CDT | Severe Thunderstorm Warning | FGF | Lake of the Woods | 31 min |
| Jul 31, 2:15 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Marshall | 30 min |
| Jul 31, 4:35 PM CDT | Flash Flood Warning | FGF | Marshall | 6 hr |
| Jul 31, 4:39 PM CDT | Flash Flood Warning | FGF | Polk | 4 hr |
| Jul 31, 4:54 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 51 min |
| Jul 31, 5:39 PM CDT | Tornado Warning | FGF | Beltrami, Lake of the Woods | 36 min |
| Jul 31, 6:05 PM CDT | Flash Flood Warning | FGF | Beltrami, Lake of the Woods, Marshall, Roseau | 6 hr |
| Jul 31, 6:13 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 32 min |
| Jul 31, 6:15 PM CDT | Tornado Warning | FGF | Lake of the Woods | 30 min |
| Jul 31, 6:23 PM CDT | Flash Flood Warning | FGF | Pennington, Polk, Red Lake | 6 hr |
| Jul 31, 6:24 PM CDT | Severe Thunderstorm Warning | FGF | Norman | 36 min |
| Jul 31, 6:54 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 36 min |
| Jul 31, 6:58 PM CDT | Severe Thunderstorm Warning | FGF | Norman | 32 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.