Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 63, NWS Grand Forks, ND

June 18, 2001Otter Tail County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 18, 2001, 3:22 AM CDT for Otter Tail County, Minnesota. It was in force for 28 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
Jun 18, 2001, 3:22 AM CDT (08:22 UTC)
Expired
Jun 18, 2001, 3:50 AM CDT
In force
28 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Otter Tail County, MN

What was reported inside it

TimeReportWhereRemark
Jun 18, 3:40 AM CDTHail 0.75Parkers Prairie, MN
Jun 18, 3:45 AM CDTHail 0.75Wrightstown, 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

Minneapolis, MN (KMPX), launched 00:00Z, 8.4 hours before the alert went out and 203 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 00:00Z on 2001-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2001-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.19395878Sfc1 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
38 J/kg
Mixed-layer CIN
-195 J/kg
Mixed-layer LCL
1536 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
289 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 180822
SVRFAR
MNC111-180850-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
322 AM CDT MON JUN 18 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN OTTER TAIL COUNTY IN WEST CENTRAL MINNESOTA...

* UNTIL 350 AM CDT

* AT 320 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTH OF VINING...OR ABOUT 25 MILES
  EAST OF FERGUS FALLS...MOVEMENT WAS TO THE EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  URBANK AT 325 AM CDT...
  ALMORA AT 330 AM CDT...
  PARKERS PRAIRIE AT 335 AM CDT...

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

LAT...LON 4633 9560 4616 9569 4597 9500 4618 9490

$$
DTR
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 Jun 18, 3:03 AM CDT, 19 minutes earlier.

Area forecast discussion, Jun 18, 3:03 AM CDT, 19 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
303 AM CDT MON JUN 18 2001

...MAIN CONCERN PCPN POTENTIAL TODAY AND TONIGHT...

.SHORT TERM...WITH ONGOING SVR WEATHER WL BE BRIEF. STRONG
CONNECTIVE ACTIVITY CONT TO MOVE QUICKLY E ACROSS SRN ZONES IN AREA
OF DECENT 850-700 MB WARM AIR ADVECTION AS DECENT 3H JET NOSES INTO
THE NRN PLAINS. FLY IN OINTMENT IS MCS DEVELOPING IN SD...WHICH
SHOULD ROB MOISTURE AND INSTABILITY FROM THE AREA FOR A TIME. LATEST
RADAR DATA SUPPORTS THIS AS MOST ACTIVITY W OF THE RED RIVER VALLEY
WEAKENING ATTM. BUT WITH GOOD SHRT WV MOVING IN LATER TODAY WITH
ASSOCIATED COLD FRONT...CONVECTIVE ACTIVITY TO REFIRE. PREFERRED AVN
SFC LOW TRACK...WHICH PUSHES LOW INTO NRN MN BY 0Z. MAX 850 MB WARM
AIR ADVECTION MOVES N ALONG THE VALLEY THIS MORNING WITH INSTABILITY
PARAMETERS STAYING UP OVER THE S. WL KEEP MENTION OF TSRA OVER THE S
FOR TODAY...WITH ONLY SHRA N. WL ALSO MENTION A POSSIBILITY OF SVR
ACROSS SE ZONES AS WARM FRONT TO LIFT INTO THIS AREA LATER THIS AM
AS LOW SHIFTS TO A MORE NNE TRACK. MOS NUMBERS REASONABLE AND WL
STAY CLOSE.

.LONG TERM...PCPN TO END RATHER QUICKLY FROM W TO E DURING THE EVE
HOURS WITH HIGH PRES BUILDING IN BEHIND THE 5H SHRT WV. WITH DRIER
AIR MOVING IN ALONG WITH CLEARING SKIES WL KEEP COOL FORECAST GOING.
TEMPS RECOVER SOMEWHAT OVER THE S BUT STAY COOL ACROSS THE N AS
SECOND SURGE OF COOLER AIR MOVES IN AS 5H TROF SWINGS AROUND MAIN
LOW INTO THE REGION.

.EXTENDED...WL LEAVE ALONE FOR NOW...WL TAKE A LOOK LATER IF TIME
PERMITS.

.FGF...NONE.

RJT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 1:37 AM CDTSevere Thunderstorm WarningFGFWilkin38 min
Jun 18, 1:49 AM CDTSevere Thunderstorm WarningFGFOtter Tail41 min
Jun 18, 2:29 AM CDTSevere Thunderstorm WarningFGFOtter Tail31 min
Jun 18, 3:01 AM CDTSevere Thunderstorm WarningFGFOtter Tail19 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.