Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 121, NWS Grand Forks, ND

July 17, 2001Becker County, Otter Tail County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 17, 2001, 8:22 PM CDT for Becker County, Otter Tail County, Minnesota. It was in force for 53 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
Jul 17, 2001, 8:22 PM CDT (01:22 UTC)
Expired
Jul 17, 2001, 9:15 PM CDT
In force
53 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), 141 km from the middle of the area, began a volume at 01:22 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.

IssuedProductOfficeLasted
Jul 17, 7:00 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.4 hours before the alert went out and 275 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.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2001-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2282 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2001-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2282 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
878 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

937 
WUUS53 KFGF 180122
SVRFAR
MNC005-111-180215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
822 PM CDT TUE JUL 17 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  SOUTHERN BECKER COUNTY IN NORTHWEST MINNESOTA AND
  EXTREME NORTH CENTRAL OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA.
  INCLUDING THE CITY OF DETROIT LAKES...

* UNTIL 915 PM CDT.

* AT 817 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHEAST OF CORMORANT...OR ABOUT 9
  MILES WEST OF DETROIT LAKES...MOVEMENT WAS TO THE EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  SHOREHAM AT 830 PM CDT...
  DETROIT LAKES AT 840 PM CDT...
  FRAZEE AT 900 PM CDT AND
  ROCHERT AT 905 PM CDT.

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY
MORNING FOR SOUTHEAST NORTH DAKOTA. A TORNADO WATCH ALSO REMAINS IN
EFFECT UNTIL MIDNIGHT CDT WEDNESDAY MORNING FOR NORTHWESTERN
MINNESOTA.

LAT...LON 4685 9613 4667 9613 4663 9537 4690 9537


$$
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 Jul 17, 8:00 PM CDT, 22 minutes earlier.

Area forecast discussion, Jul 17, 8:00 PM CDT, 22 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
800 PM CDT TUE JUL 17 2001

...DUE TO ONGOING SEVERE WEATHER...THE EVENING AFfD WILL BE DELAYED...

THE EVENING FORECAST DISCUSSION AND ZONE UPDATES WILL OCCUR ONCE THE
SEVERE WEATHER SUBSIDES...

RJT

In the hours before

Local storm report, Jul 17, 5:28 PM CDT, 2 hours 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
528 PM CDT TUE JUL 17 2001

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0350 PM    7 W FINLEY                ND   2 INCH HAIL
07/17/01   GRIGGS

0400 PM    7 SW FINLEY               ND   2 INCH HAIL
07/17/01   STEELE                         GROUND WAS WHITE

0404 PM    4 E COOPERSTOWN           ND   1 INCH HAIL
07/17/01   GRIGGS

0405 PM    5 W FINLEY                ND   1.75 INCH HAIL
07/17/01   STEELE

0425 PM    3 N BEMIDJI               MN   1.5 INCH HAIL
07/17/01   BELTRAMI

0428 PM    3 S FINLEY                ND   1 INCH HAIL
07/17/01   STEELE

0435 PM    5 N HOPE                  ND   1.75 INCH HAIL
07/17/01   STEELE

0435 PM    3 S SALOL                 MN   1 INCH HAIL
07/17/01   ROSEAU

0440 PM    10 N GRYGLA               MN   .75 INCH HAIL
07/17/01   MARSHALL

0453 PM    4 W KELLIHER              MN   .75 INCH HAIL
07/17/01   BELTRAMI

NNNN
Special weather statement, Jul 17, 7:29 PM CDT, 53 minutes before
NDZ014-015-024-026>030-180100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
729 PM CDT TUE JUL 17 2001

...SEVERE THUNDERSTORM WATCH HAS EXPIRED...

AT 700 PM CDT...THE ATMOSPHERE HAS STABILIZED OVER BENSON...
RAMSEY...NELSON...GRAND FORKS...EDDY...GRIGGS...STEELE AND TRAILL
COUNTIES OF EASTERN NORTH DAKOTA. WHILE SCATTERED THUNDERSTORMS ARE
POSSIBLE...NO SEVERE WEATHER IS EXPECTED.

A TORNADO WATCH REMAINS IN EFFECT FOR SOUTHEAST NORTH DAKOTA AND
MUCH OF NORTHWEST MINNESOTA UNTIL MIDNIGHT CDT.

RJT

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 7:02 PM CDTTornado WarningFGFBeltrami28 min
Jul 17, 7:14 PM CDTSevere Thunderstorm WarningFGFLake of the Woods61 min
Jul 17, 7:16 PM CDTTornado WarningFGFWadena29 min
Jul 17, 7:32 PM CDTSevere Thunderstorm WarningFGFBeltrami43 min
Jul 17, 8:10 PM CDTTornado WarningFGFWilkin35 min
Jul 17, 8:15 PM CDTSevere Thunderstorm WarningFGFHubbard60 min
Jul 17, 8:18 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods57 min
Jul 17, 8:42 PM CDTSevere Thunderstorm WarningFGFWilkin48 min
Jul 17, 9:11 PM CDTSevere Thunderstorm WarningFGFOtter Tail49 min
Jul 17, 9:59 PM CDTSevere Thunderstorm WarningFGFOtter Tail31 min
Jul 17, 11:00 PM CDTSevere Thunderstorm WarningFGFWilkin30 min
Jul 18, 4:22 PM CDTTornado WarningFGFKittson38 min
Jul 18, 4:57 PM CDTTornado WarningFGFKittson33 min
Jul 18, 5:29 PM CDTTornado WarningFGFKittson, Roseau46 min
Jul 18, 6:14 PM CDTSevere Thunderstorm WarningFGFRoseau61 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.