Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 207, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 29, 2001, 10:11 PM CDT for Pennington County, Polk County, Red Lake County, Minnesota. It was in force for 49 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 29, 2001, 10:11 PM CDT (03:11 UTC)
- Expired
- Jul 29, 2001, 11:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Pennington County, MN, Polk County, MN, Red Lake County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 81 km from the middle of the area, began a volume at 03:14 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 29, 10:25 PM CDT | Hail 0.88 | Dorothy, 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 nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 3.2 hours before the alert went out and 241 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 961 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
212 WUUS53 KFGF 300311 SVRFAR MNC113-119-125-300400- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 1011 PM CDT SUN JUL 29 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN PENNINGTON COUNTY IN NORTHWEST MINNESOTA... CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA AND WESTERN RED LAKE COUNTY IN NORTHWEST MINNESOTA. * UNTIL 1100 PM CDT. * AT 1009 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER HUOT...OR ABOUT 21 MILES SOUTHWEST OF THIEF RIVER FALLS...MOVEMENT WAS TO THE NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... DOROTHY AT 1015 PM... RED LAKE FALLS AT 1025 PM... WYLIE AT 1030 PM AND ST. HILAIRE AT 1050 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4788 9661 4774 9644 4792 9605 4809 9627 $$ 23 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 29, 8:04 PM CDT, 2 hours 7 minutes earlier.
Area forecast discussion, Jul 29, 8:04 PM CDT, 2 hours 7 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 804 PM CDT SUN JUL 29 2001 WATER VAPOR LOOP SHOWS FAIRLY ZONAL FLOW FM THE PAC NW INTO THE NRN PLNS. FLOW ALF BECMS MORE SW AS WV DIGS IN THE PAC NW. WATER VAPOR ALSO SHOWING SHORT WV OVR SW ND AND ANOTHER OVR N CNTRL MN MOVG E. ATMOS IS QUITE UNSTABLE ESPECIALLY IN THE S WITH LI'S ARND -10, GOOD SFC MSTR CONVERGENCE, AND CAPES ARND 4000 J/KG. SOME -SPKLS HAVE POPPED UP AND DSIPTD ON 88D IN THE SRN VLY AND IN NE ZONES. WARM MID LVL TEMPS HAVE CAPPED THE ATMOS AS WELL AS PARTING MN WV. WITH LOW LVL CLDS THIS AFTN, CONVECTIVE TEMPS FM THE UPR 80S N TO LWR 90S S HAVE NOT BEEN REACHED. ETA MODEL SNDGS ACTUALLY SHOW A LITTLE WARMING BTWN 850 AND 650 HPA OVNGT IN THE S AND SLGT COOLING THROUGH A DEEPER LYR IN THE NRN VLY. STLT LOOPS SHOWING APPROACHING WV TO MOV INTO ERN ND THIS EVE AND WOULD XPC TSRA TO DEVELOP. VIS STLT LOOP SHOWING SEVERAL CU LINES S OF GFK, AND FM FAR TO BJI. WL KEEP TSRA IN FCST TNGT. WL CHECK ZONES. .FGF...NONE. HOPPES
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 11:33 AM CDT | Severe Thunderstorm Warning | FGF | Becker, Otter Tail | 42 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.