Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 147, NWS Grand Forks, ND

July 14, 1998Wilkin County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 14, 1998, 7:21 PM CDT for Wilkin County, Minnesota. It was in force for 34 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 14, 1998, 7:21 PM CDT (00:21 UTC)
Expired: Jul 14, 1998, 7:55 PM CDT
In force: 34 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Wilkin County, MN

What was reported inside it

Time	Report	Where	Remark
Jul 14, 7:30 PM CDT	Hail 1	Kent, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 14, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 14, 4:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.4 hours before the alert went out and 221 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4358 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1271 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 150021 RRA
SVRFAR
MNC167-150055-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
721 PM CDT TUE JUL 14 1998

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN WILKIN COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 755 PM CDT

* AT 720 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR BRECKENRIDGE OR 2 MILES EAST OF WAHPETON
  MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DORAN AT 745 PM CDT

DAMAGING WIND...LARGE HAIL...DEADLY LIGHTNING AND TORNADOES ARE
ALL POSSIBLE IN SEVERE THUNDERSTORMS. SEEK SHELTER IN A REINFORCEDf
BUILDING IMMEDIATELY

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 14, 2:30 PM CDT, 4 hours 51 minutes earlier.

Area forecast discussion, Jul 14, 2:30 PM CDT, 4 hours 51 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
230 PM CDT TUE JUL 14 1998

COLD FRONT LOCATED AT 19Z FROM NR LANGDON TO DEVILS LAKE TO WK LOW
PRESSURE SYSTEM JUST NORTH OF MOBRIDGE SD.  EARLY MORNING TSTMS
TEMPORARILY STABILZED NE ND...LEAVING OUTFLOW BOUNDARY FROM NEAR
BEMIDJI TO WHAPETON.  ATMOSPHERE ALONG THIS BOUNDARY EXTREMELY UNSTABLE
WITH LI DOWN TO -13 AND DEW POINTS POOLING IN THE UPPER 70S.  EXPECT
CONTINUED SEVERE TSTM DEVELOPMENT ALONG THIS BOUNDARY BACK ACROSS SE
ND/WCNTRL MN THIS AFTERNOON.  ACTIVITY WILL MOVE OUT BY MID EVENING.
12Z ETA/NGM GRIDDED DATA SHOWS MAIN FRONTOGENESIS ALONG THIS BOUNDARY.

BIGGER QUESTION IS WILL STORMS RE-DEVELOP OVR NE ND AND NW MN WHERE
ATMOSPHERE WAS ABLE TO STABLIZE.  SOME SIGNS NOW ON SATELLITE OF MID
LEVEL INSTABILITY WITH ACCAS DEVELOPMENT ALONG COLD FRONT NORTH OF
DEVILS LAKE AND TO THE SOUTHWEST OF GRAND FORKS.  NRN VALLEY WILL BE
AIDED BY RIGHT REAR EXIT REGION OF 90 KT 300 MB JET.  DEW POINTS NOW UP
TO 74 AT KGFK...SO THINK WDLY SCATTERED TSTMS WILL DEVELOP OVER THE NRN
VALLEY AND NW MN LATE THIS AFTERNOON.

THUS FOR THE FORECAST TONIGHT...WILL STICK WITH EVENING TSTM IN MOST
AREAS...EXCEPT POSSIBILY DEVILS LAKE.  ACTIVITY WILL END BY MIDNIGHT
THEN CLEARING AND LOWER HUMIDITY LEVELS.  LOOKING AT DRIER UPSTREAM DEW
POINTS EXPECT LOW TEMPS IN THE UPPER 50S AT DEVILS LAKE TO THE MID 60S
IN WCNTRL MN.

RIDDLE

In the hours before

Local storm report, Jul 14, 3:35 PM CDT, 3 hours 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
335 PM CDT TUE JUL 14 1998

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

0145 PM    5SE ROTHSAY               MN   0.75 INCH HAIL
07/14/98   WILKIN

0220 PM    3 SE ELIZEBETH            MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0235 PM    PHELPS                    MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0300 PM    WEGGELAND                 MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0316 PM    PHELPS                    MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0325 PM    WEGGELAND                 MN   FLOODING
07/14/98

 BELLES

GODON

Local storm report, Jul 14, 5:02 PM CDT, 2 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
502 PM CDT TUE JUL 14 1998

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

0335 PM    PHELPS                    MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0353 PM    WEGGELAND                 MN   2.75 INCH HAIL
07/14/98   OTTER TAIL

0353 PM    PHELPS                    MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0400 PM    5N BATTLE LAKE            MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0424 PM    4W PELICAN RAPIDS         MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0425 PM    PELICAN RAPIDS            MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0430 PM    PELICAN RAPIDS            MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0430 PM    4W PELICAN RAPIDS         MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0430 PM    15E PELICAN RAPIDS        MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0437 PM    5NNE PHELPS               MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0440 PM    DENT                      MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0443 PM    15E PELICAN RAPIDS        MN   1.00 jINCH HAIL
07/14/98   OTTER TAIL

SCHUMACHER

Local storm report, Jul 14, 5:02 PM CDT, 2 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
502 PM CDT TUE JUL 14 1998

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

0335 PM    PHELPS                    MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0353 PM    WEGGELAND                 MN   2.75 INCH HAIL
07/14/98   OTTER TAIL

0353 PM    PHELPS                    MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0400 PM    5N BATTLE LAKE            MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0424 PM    4W PELICAN RAPIDS         MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0425 PM    PELICAN RAPIDS            MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0430 PM    PELICAN RAPIDS            MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0430 PM    4W PELICAN RAPIDS         MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0430 PM    15E PELICAN RAPIDS        MN   0.75 INCH HAIL
07/14/98   OTTER TAIL

0437 PM    5NNE PHELPS               MN   1.75 INCH HAIL
07/14/98   OTTER TAIL

0440 PM    DENT                      MN   1.00 INCH HAIL
07/14/98   OTTER TAIL

0443 PM    15E PELICAN RAPIDS        MN   1.00 jINCH HAIL
07/14/98   OTTER TAIL

SCHUMACHER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 7:07 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	33 min
Jul 14, 7:50 PM CDT	Severe Thunderstorm Warning	FGF	Wilkin	35 min
Jul 14, 8:03 PM CDT	Severe Thunderstorm Warning	FGF	Grant	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998 Every severe thunderstorm warning in 1998

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.