Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 381, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 6, 2001, 4:18 PM CDT for Polk County, Red Lake County, Minnesota. It was in force for 42 min. No storm report in the archive falls 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.
The facts
- Issued
- Sep 6, 2001, 4:18 PM CDT (21:18 UTC)
- Expired
- Sep 6, 2001, 5:00 PM CDT
- In force
- 42 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Polk County, MN, Red Lake County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 70 km from the middle of the area, began a volume at 21:18 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 6, 3:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 9.3 hours before the alert went out and 251 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
- 668 J/kg
- Mixed-layer CIN
- -275 J/kg
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
619 WUUS53 KFGF 062119 SVRFAR MNC119-125-062200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 418 PM CDT THU SEP 6 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL POLK COUNTY IN NORTHWEST MINNESOTA AND SOUTHWESTERN RED LAKE COUNTY IN NORTHWEST MINNESOTA. * UNTIL 500 PM CDT. * AT 413 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE LEADING EDGE OF SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 24 MILES SOUTHWEST OF THIEF RIVER FALLS TO 28 MILES SOUTHEAST OF GRAND FORKS...MOVEMENT WAS TO THE NORTHEAST AT 10 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... GENTILLY AT 440 PM AND DELORME AT 500 PM. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM THURSDAY EVENING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH DAKOTA. LAT...LON 4785 9646 4757 9682 4758 9639 4784 9608 $$ BRAZZELL 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 Sep 6, 3:52 PM CDT, 26 minutes earlier.
Area forecast discussion, Sep 6, 3:52 PM CDT, 26 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS 352 PM CDT THU SEP 6 2001 .SHORT TERM... UPR LVL WV OVR ERN ND TO MOV E TNGT. 88D SHOWING WIDELY SCT TSRA OVR NW COUNTIES MOVG NE. 88D ALSO SHOWING BOUNDARY MOVG S ACRS GFK COUNTY. NEW STORMS HAVE FIRED NE OF GFK ALONG BOUNDARY. SFC WNDS HAVE BECM NRLY OVR THE NW HALF OF THE CWFA. MESOSCALE ANLYS HAS BEST SFC MSTR FLUX CONVERGENCE ALONG FNTL BNDRY. LIS WERE -6 TO -7 AND PRECIPITABLE WATERS ARND 1.5 INCHES. SECOND WV OVR BC TO DIG ACRS THE PLNS FRI AND BRING ANOTHER CHC OF PRECIP FOR FRI NGT/SAT MORN MAINLY IN THE NRN ZONES. WATER VAPOR LOOP SHOWING A WEAK WV OVR SRN ND. LARGER CIRC OVR WY AND IS FCST TO MOV TO THE TX PANHANDLE BY FRI AFTN. SPC COOR FOR WATCH FOR MOSTLY MN SIDE. .EXTENDED... BOTH AVN AND MRF SHOW 50H VORT MOVING PAST THE AREA ON MONDAY. 500 MB TEMPS DROP TO AROUND -24C IN NORTHERN HALF OF CWA ON MONDAY. MRF MORE PROGRESSIVE WITH VORT THAN AVN. WILL LEAVE MONDAY DRY FOR NOW BUT WILL HAVE TO TAKE A CLOSER LOOK AT NEXT MODEL RUNS. MRF BRINGS ONLY WEAK 50H SHORT WAVE IN ON TUESDAY...WHICH IS SIGNIFICANTLY DIFFERENT FROM PREVIOUS RUN BUT WILL LEAVE TSTM MENTION IN . WEDNESDAY AND THURSDAY LOOK DRY FOR NOW BUT ECMWF AND MRF DISAGREE ON BOUNDARY POSITION WEDNESDAY...WILL WAIT FOR LATER RUNS BEFORE ADDING PRECIPITATION CHANCES. WILL KEEP HIGH TEMPS AROUND 70 AND LOWS IN THE 45-55 DEGREE RANGE. .FGF...WW 709 TIL 8 PM CDT. HOPPES/BRIDENSTINE
In the hours before
Special weather statement, Sep 6, 1:15 PM CDT, 3 hours 3 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024- 026>030-038-039-049-052>054-062000- SPECIAL WEATHER STATEMENT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 115 PM CDT THU SEP 6 2001 ...THERE IS A RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF SOUTHEAST NORTH DAKOTA AND WESTERN MINNESOTA LATE THIS AFTERNOON AND EVENING... SYNOPSIS...A SLOW MOVING COLD FRONT WILL ENCOUNTER A MOIST AND MODERATELY UNSTABLE AIRMASS AS IS ADVANCES INTO EASTERN NORTH THIS AFTERNOON...AND INTO WESTERN MINNESOTA EARLY THIS EVENING. TEMPERATURES WILL WARM INTO THE 80S THROUGH THE AFTERNOON...AND WHEN COMBINED WITH DEWPOINTS IN THE MIDDLE TO UPPER 60S...INSTABILITY WILL BE MAXIMIZED ACROSS THE SOUTHERN HALF OF THE RED RIVER VALLEY. AREA OF CONCERN...A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS EAST OF A HALLOCK TO COOPERSTOWN AND ELLENDALE LINE. TIME...START AFTER 300 PM AND DIMINISH AFTER 900 PM. TYPE OF HAZARD...MAINLY LARGE HAIL. DAMAGING WINDS WILL BE A THREAT...AS WILL LOCALLY FLOODING RAINS FROM SLOW MOVING OR REPEAT THUNDERSTORM EVENTS. GUST
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 3:25 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington | 35 min |
| Sep 6, 5:01 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 59 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.