Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 217, NWS Grand Forks, ND

July 30, 2001Wadena County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 30, 2001, 12:20 PM CDT for Wadena County, Minnesota. It was in force for 25 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 30, 2001, 12:20 PM CDT (17:20 UTC)
Expired
Jul 30, 2001, 12:45 PM CDT
In force
25 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Wadena County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 203 km from the middle of the area, began a volume at 17:21 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 5.3 hours before the alert went out and 223 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, Minneapolis, MN at 12:00Z on 2001-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3565 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, Minneapolis, MN at 12:00Z on 2001-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 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
3565 J/kg
Mixed-layer CIN
-205 J/kg
Mixed-layer LCL
778 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

680 
WUUS53 KFGF 301720
SVRFAR
MNC159-301745-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
1220 PM CDT MON JUL 30 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  WADENA COUNTY IN CENTRAL MINNESOTA.

* UNTIL 1245 PM CDT.

* AT 1216 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTHWEST OF SEBEKA...OR ABOUT 36 MILES
  SOUTHEAST OF DETROIT LAKES...MOVEMENT WAS TO THE EAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  BLUE GRASS AT 1225 PM AND
  NIMROD AT 1230 PM.

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

LAT...LON 4674 9512 4638 9513 4640 9483 4674 9485


$$
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 30, 10:25 AM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Jul 30, 10:25 AM CDT, 1 hour 55 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
1025 AM CDT MON JUL 30 2001

CONVECTION CONT TO EXPAND ACROSS THE AREA THIS AM IN RESPONSE TO
WARM FRONT LIFTING THRU SE ND AND W CENTRAL MN. NEW MESOETA PROGS
ACTIVITY TO GRADUALLY DIMINISH LATER THIS MORNING AS INSTABILITY
DECREASES WHILE CONVECTIVE INHIBITION ON THE INCREASE. THIS
REASONABLE AS UPPER AIR ANALYSIS SHOWS WEAK 7H WAVE MOVING THRU IN
SW FLOW WHILE WARMER AIR PUSHES IN AT THIS HEIGHT TO HELP CAP OFF
CONVECTION OVER THE SRN ZONES. HOWEVER...NRN VALLEY AND POINTS E TO
STAY ACTIVE THRU MUCH OF THE AFTN AS THIS AREA TO STAY
UNSTABLE...ESPECIALLY ALONG STALLED BOUNDARY EXTENDING ALONG THE
RED RIVER VALLEY.

WL UP PCPN POTENTIAL OVER MUCH OF THE REGION WITH UPDATE. WL NOT
MAKE OTHER CHANGES LATER AS TIME PERMITS.

.FGF...NONE.

RJT

In the hours before

Special weather statement, Jul 30, 7:06 AM CDT, 5 hours 14 minutes before
MNZ001>009-013>017-022>024-027>032-040-NDZ006>008-014>016-024-
026>030-038-039-049-052>054-301400-

SPECIAL WEATHER STATEMENT
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
706 AM CDT MON JUL 30 2001

...SLIGHT RISK OF SEVERE THUNDERSTORMS LATER THIS EVENING INTO EARLY
TUESDAY...

SYNOPSIS...MOIST UNSTABLE AIR REMAINS IN PLACE ACROSS THE RED RIVER
VALLEY INTO NORTHWEST MINNESOTA. AS THE DAY PROGRESSES...THIS MOIST
UNSTABLE AIR WILL BEGIN TO WORK ITS WAY BACK TO THE WEST. A FRONTAL
BOUNDARY WILL ALSO REFORM ACROSS CENTRAL NORTH DAKOTA DURING THE
DAY TODAY. TEMPERATURES WILL ONCE AGAIN WARM NICELY BY AFTERNOON...
HELPING TO PROVIDE ADDITIONAL FUEL FOR THUNDERSTORM DEVELOPMENT.

AREA OF CONCERN...A SLIGHT RISK OF SEVERE WEATHER IS EXPECTED
ACROSS ALL OF EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA.

TIME...GREATEST RISK IS EXPECTED AFTER 9 PM CONTINUING INTO THE
EARLY MORNING HOURS.

TYPE OF HAZARD...HAIL WILL BE THE MAIN THREAT ALTHOUGH SOME
LOCALIZED HEAVY RAIN IS ALSO POSSIBLE.

GODON
Local storm report, Jul 30, 8:45 AM CDT, 3 hours 35 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
845 AM CDT MON JUL 30 2001

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

0745 AM    4 NE CRETE                ND   1 INCH HAIL
07/30/01   SARGENT

0750 AM    ENGLEVALE                 ND   .75 INCH HAIL
07/30/01   RANSOM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 10:11 PM CDTSevere Thunderstorm WarningFGFPennington, Polk, Red Lake49 min
Jul 30, 10:07 AM CDTSevere Thunderstorm WarningFGFClay38 min
Jul 30, 11:17 AM CDTSevere Thunderstorm WarningFGFPolk43 min
Jul 30, 11:33 AM CDTSevere Thunderstorm WarningFGFBecker, Otter Tail42 min
Jul 30, 12:25 PM CDTSevere Thunderstorm WarningFGFPolk, Red Lake50 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.