Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 155, NWS Grand Forks, ND

July 18, 2001Polk County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 18, 2001, 9:51 PM CDT for Polk County, Minnesota. It was in force for 39 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 18, 2001, 9:51 PM CDT (02:51 UTC)
Expired
Jul 18, 2001, 10:30 PM CDT
In force
39 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 68 km from the middle of the area, began a volume at 02:51 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 18, 4:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.9 hours before the alert went out and 269 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 2001-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2275 joules per kilogram.LCLEL10008507005003002001001 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 2001-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.193958Sfc1 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
2275 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1506 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.6
Supercell composite
9.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 190252
SVRFAR

MNC119-190330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
951 PM CDT WED JUL 18 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHWESTERN POLK COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 1030 PM CDT.

* AT 946 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES WEST OF TABOR...OR ABOUT 8 MILES NORTH
  OF GRAND FORKS...MOVEMENT WAS TO THE NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  TABOR AT 1005 PM CDT...
  SHERACK AT 1010 PM CDT AND
  ANGUS AT 1015 PM CDT.

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA. A TORNADO WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM CDT WEDNESDAY EVENING FOR
NORTHWESTERN MINNESOTA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT
THURSDAY MORNING FOR NORTHWESTERN MINNESOTA. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL[ 300 AM CDT THURSDAY MORNING FOR
SOUTHEAST NORTH DAKOTA.

LAT...LON 4815 9709 4793 9701 4789 9653 4814 9654


$$
AV
04

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 18, 8:29 PM CDT, 1 hour 22 minutes earlier.

Area forecast discussion, Jul 18, 8:29 PM CDT, 1 hour 22 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
829 PM CDT WED JUL 18 2001

...DUE TO ONGOING SVR WEATHER WL BE BRIEF...

MSAS AND SFC ANALYSIS SHOWING BEST MOIST CONVERGENCE EXTENDING FROM
E OF GFK TO NR DVL ATTM. SFC WARM FRONT CONT TO MOVE N THRU SE ND
AND INTO NW MN PROVIDING FOCUS FOR ONGOING CONVECTION. ALTHOUGH BEST
FOCUS E OF DVL AREA ATTM...TSTMS CONT JUST E OF THIS AREA AND AM
HESITANT TO DROP WATCH THERE BEFORE EXPIRATION TIME. THUS WL KEEP
TORNADO WATCHES GOING UNTIL 3Z THIS AREA.

FFA LOCATIONS LOOK REASONABLE...AND WL CONT AS PREVIOUSLY FORECAST.
ALL SAID...NO BIG CHANGES NEEDED ATTM. WL SEND EVENING UPDATE AFTER
3Z.

.FGF...FLASH FLOOD WATCH UNTIL MIDNIGHT ALONG AND NORTH OF A DVL-GFK
LINE...FOR REST OF FA OVERNIGHT.

RJT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 7:04 PM CDTSevere Thunderstorm WarningFGFKittson41 min
Jul 18, 7:08 PM CDTFlash Flood WarningFGFKittson3 hr
Jul 18, 7:23 PM CDTSevere Thunderstorm WarningFGFLake of the Woods52 min
Jul 18, 7:36 PM CDTTornado WarningFGFLake of the Woods39 min
Jul 18, 7:45 PM CDTSevere Thunderstorm WarningFGFKittson45 min
Jul 18, 7:54 PM CDTSevere Thunderstorm WarningFGFRoseau66 min
Jul 18, 8:09 PM CDTFlash Flood WarningFGFLake of the Woods, Roseau2 hr
Jul 18, 8:44 PM CDTTornado WarningFGFMarshall46 min
Jul 18, 8:50 PM CDTSevere Thunderstorm WarningFGFBeltrami, Lake of the Woods55 min
Jul 18, 9:01 PM CDTSevere Thunderstorm WarningFGFRoseau29 min
Jul 18, 9:43 PM CDTSevere Thunderstorm WarningFGFLake of the Woods47 min
Jul 18, 10:00 PM CDTSevere Thunderstorm WarningFGFBeltrami45 min
Jul 18, 10:14 PM CDTFlash Flood WarningFGFLake of the Woods, Roseau3 hr
Jul 18, 10:32 PM CDTSevere Thunderstorm WarningFGFPolk28 min
Jul 18, 10:37 PM CDTSevere Thunderstorm WarningFGFMarshall38 min
Jul 18, 11:04 PM CDTSevere Thunderstorm WarningFGFBeltrami41 min
Jul 18, 11:11 PM CDTSevere Thunderstorm WarningFGFPennington49 min
Jul 18, 11:18 PM CDTTornado WarningFGFPennington, Red Lake27 min
Jul 18, 11:42 PM CDTTornado WarningFGFRed Lake33 min
Jul 19, 12:14 AM CDTTornado WarningFGFPolk31 min
Jul 19, 12:27 AM CDTFlash Flood WarningFGFMarshall, Polk2 hr
Jul 19, 12:54 AM CDTSevere Thunderstorm WarningFGFNorman66 min
Jul 19, 1:09 AM CDTSevere Thunderstorm WarningFGFPolk66 min
Jul 19, 1:28 AM CDTSevere Thunderstorm WarningFGFClay47 min
Jul 19, 1:59 AM CDTSevere Thunderstorm WarningFGFMarshall46 min
Jul 19, 2:05 AM CDTSevere Thunderstorm WarningFGFMahnomen, Norman40 min
Jul 19, 2:15 AM CDTSevere Thunderstorm WarningFGFClay30 min
Jul 19, 2:28 AM CDTSevere Thunderstorm WarningFGFBecker47 min
Jul 19, 2:52 AM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Hubbard38 min
Jul 19, 3:12 AM CDTSevere Thunderstorm WarningFGFBecker63 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.