Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 331, NWS Grand Forks, ND

August 17, 2001Marshall County, Roseau County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 17, 2001, 4:02 PM CDT for Marshall County, Roseau County, Minnesota. It was in force for 43 min. 2 reports 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
Aug 17, 2001, 4:02 PM CDT (21:02 UTC)
Expired
Aug 17, 2001, 4:45 PM CDT
In force
43 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Marshall County, MN, Roseau County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 154 km from the middle of the area, began a volume at 21:02 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

TimeReportWhereRemark
Aug 17, 4:05 PM CDTHail 0.75Badger, MN
Aug 17, 4:05 PM CDTHail 0.75Middle River, 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 12:00Z, 9.0 hours before the alert went out and 191 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 12:00Z on 2001-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 34 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 12:00Z on 2001-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 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
34 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

769 
WUUS53 KFGF 172102
SVRFAR
MNC089-135-172145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
402 PM CDT FRI AUG 17 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  EASTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA AND   
  SOUTHERN ROSEAU COUNTY IN NORTHWEST MINNESOTA.

* UNTIL 445 PM CDT.

* AT 356 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 17 MILES NORTHWEST OF GATZKE...OR ABOUT 19
  MILES SOUTHWEST OF ROSEAU...MOVEMENT WAS TO THE SOUTHEAST AT 25
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  GATZKE AT 435 PM.

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

LAT...LON 4872 9593 4862 9616 4819 9578 4837 9567


$$

7

NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 1:53 PM CDTSevere Thunderstorm WarningFGFKittson52 min
Aug 17, 2:14 PM CDTSevere Thunderstorm WarningFGFBeltrami46 min
Aug 17, 2:27 PM CDTSevere Thunderstorm WarningFGFMarshall, Pennington48 min
Aug 17, 3:04 PM CDTSevere Thunderstorm WarningFGFKittson, Marshall41 min
Aug 17, 3:07 PM CDTSevere Thunderstorm WarningFGFPolk, Red Lake38 min
Aug 17, 3:19 PM CDTSevere Thunderstorm WarningFGFRoseau41 min
Aug 17, 3:23 PM CDTSevere Thunderstorm WarningFGFPolk, Red Lake52 min
Aug 17, 4:00 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Hubbard45 min
Aug 17, 4:10 PM CDTSevere Thunderstorm WarningFGFMahnomen, Polk50 min
Aug 17, 4:20 PM CDTSevere Thunderstorm WarningFGFNorman40 min
Aug 17, 4:35 PM CDTSevere Thunderstorm WarningFGFClay, Norman40 min
Aug 17, 4:41 PM CDTSevere Thunderstorm WarningFGFBecker49 min
Aug 17, 4:43 PM CDTSevere Thunderstorm WarningFGFOtter Tail, Wilkin47 min
Aug 17, 4:46 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater, Hubbard44 min
Aug 17, 4:56 PM CDTSevere Thunderstorm WarningFGFPolk49 min
Aug 17, 5:10 PM CDTSevere Thunderstorm WarningFGFNorman50 min
Aug 17, 5:17 PM CDTSevere Thunderstorm WarningFGFHubbard, Wadena43 min
Aug 17, 5:29 PM CDTSevere Thunderstorm WarningFGFBecker, Otter Tail, Wilkin46 min
Aug 17, 5:49 PM CDTSevere Thunderstorm WarningFGFPolk41 min
Aug 17, 6:02 PM CDTSevere Thunderstorm WarningFGFGrant43 min
Aug 17, 6:14 PM CDTSevere Thunderstorm WarningFGFOtter Tail46 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.