Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 27, NWS Grand Forks, ND

June 18, 1986Otter Tail County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 18, 1986, 1:37 AM CDT for Otter Tail County, Minnesota. It was in force for 53 min.

The area

The counties it named.

The facts

Issued: Jun 18, 1986, 1:37 AM CDT (06:37 UTC)
Expired: Jun 18, 1986, 2:30 AM CDT
In force: 53 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Otter Tail County, MN

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 6.6 hours before the alert went out and 239 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2042 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KFAR 180637
SVRFAR
MNC111-180730-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FARGO ND
137 AM CDT WED JUN 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 230 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

WEST CENTRAL MINNESOTA...OTTER TAIL

AT 128 AM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
FROM PELICAN RAPIDS MINNESOTA TO JUST SOUTHEAST OF FERGUS FALLS
MINNESOTA MOVING TOWARD THE EAST AT 40 MILES AN HOUR.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 58 MPH AND/OR HAIL 3/4 OF AN INCH OR LARGER...DEADLY LIGHTNING...
AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA.

THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING...SO YOU SHOULD BE ON THE LOOKOUT AND BE
PREPARED TO MOVE TO A PLACE OF SAFETY.

IF THREATENING WEATHER APPROACHES...YOU SHOULD GO TO A PLACE OF:
SAFETY IMMEDIATELY.  REPORT ALL SEVERE WEATHER TO YOUR LOCAL LAW
ENFORCEMENT AGENCY AFTER THE STORM PASSES.

TS/MB

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.

In the hours before

Special weather statement, Jun 17, 7:37 PM CDT, 6 hours before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
735 PM CDT TUE JUN 17 1986

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHEAST NORTH DAKOTA..
NORTHEAST SOUTH DAKOTA AND CENTRAL MINNESOTA UNTIL 1100 PM...

AT 726 PM CDT...SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH HEAVY
RAIN...WERE LOCATED OVER EAST CENTRAL AND SOUTHEAST NORTH DAKOTA AND
OVER WEST CENTRAL AND  CENTRAL MINNESOTA.

THE HEAVIEST THUNDERSTORMS WERE LOCATED BETWEEN PARK RAPIDS AND
BRAINERD MINNESOTA.

MOVEMENT WAS SOUTHEAST AT 35 MILES AN HOUR.

NO REPORTS OF SEVERE WEATHER HAD BEEN RECEIVED BY THE NATIONAL WEATHER
SERVICE OFFICE IN FARGO AS OF 730 PM CDT...HOWEVER CONDITIONS REMAIN
FAVARABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS IN AND CLOSE TO
THE WATCH AREA.  IF YOU LIVE IN OR NEAR THE WATCH AREA...YOU SHOULD
LISTEN TO TV..RADIO..OR NOAA WEATHER RADIO FOR THE LATEST STATEMENTS
OR POSSIBLE WARNINGS.
MB

Local storm report, Jun 17, 10:22 PM CDT, 3 hours 15 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
 1017 PM CDT TUE JUN 17 1986

TIME      EVENT
 958 PM   CASSELTON ND 1 INCH HAIL REPORTED BY PUBLIC MR. LARRY ELISON

1007 PM   MAPLETON ND COOP OBSERVER REPORTED MARBLE TO A FEW GOLFBALL
          SIZE HAIL.

1010 PM   MAPLETON ND FIRE DEPT. REPORTED 1/2 - 1 INCH 5 MILES SOUTH
          OF MAPLETON ND.

1020 PM   I-94 SCALES NEAR MAPLETON ND EVAC REPORTED VERY HEAVY RAIN
          AND PEA TO MARBLE SIZE HAIL

                                                                      z

Local storm report, Jun 17, 11:26 PM CDT, 2 hours 11 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
 1110 PM CDT TUE JUN 17 1986

TIME      EVENT
 1025 PM  1-94 FROM WEST FARGO TO MAPLETON ND HIGHWAY WHITE WITH
          1 INCH HAIL. RED CROSS VOLUNTEER.

1002 PM   DELAID REPORT 4 WEST OF PROSPER ND GOLFBALL SIZE HAIL.
          AG SPRAYER.

1051 PM   WDAY RADIO SPOTTER 5 WEST OF PROSPER ND 3 INCH HAIL.

1100 PM   FERGUS FALLS MN PEA TO MARBLE SIZE HAIL.

1100 PM   1/2 INCH HAIL WEST SIDE OF FARGO ND. RED CROSS VOLUNTEER.

1105 PM  PEA TO MARBLE SIZE SABIN MN. EVAC/HAM OPERATOR.

1110 PM   SOUTH MOORHEAD COOP OBSERVER. PEA SIZE HAIL.

1115 PM    NORTH FARGO ND 1- 1 1/4 INCH HAIL. EVAC.

1120 PM    SABIN MN MARBLE SIZE HAIL. 40 MPH WIND. EVAC

1125 PM    GOLFBALL SIZE HAIL REPORTED 1 SOUTH MOORHEAD MN

1125 PM    2 INCH HAIL REPORT SOUTH MOORHEAD MN AT RAMADA INN.

1126 PM    SOUTH MOORHEAD MN OFF-DUTY MET TECH 11/2 INCH HAIL COVERING
           GROUND.
BENNETT

Local storm report, Jun 18, 12:13 AM CDT, 1 hour 24 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
 1210 AM CDT WED JUN 18 1986

TIME      EVENT
 1210 AM  SOUTH MOORHEAD COOP OBSERVER 11/2-2 INCH HAIL.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 10:05 PM CDT	Severe Thunderstorm Warning	FGF	Clay	55 min
Jun 17, 10:59 PM CDT	Severe Thunderstorm Warning	FGF	Clay	61 min
Jun 17, 11:36 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail, Wilkin	54 min
Jun 18, 12:02 AM CDT	Severe Thunderstorm Warning	FGF	Clay	58 min
Jun 18, 12:18 AM CDT	Severe Thunderstorm Warning	FGF	Douglas	57 min
Jun 18, 12:34 AM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	56 min
Jun 18, 12:58 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay	62 min
Jun 18, 1:17 AM CDT	Severe Thunderstorm Warning	FGF	Douglas	43 min
Jun 18, 2:13 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Norman	47 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1986 Every severe thunderstorm warning in 1986

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.