Alert archive / North Dakota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 5, NWS Bismarck, ND

May 11, 1986Stutsman County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at May 11, 1986, 9:37 PM CDT for Stutsman County, North Dakota. It was in force for 45 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: May 11, 1986, 9:37 PM CDT (02:37 UTC)
Expired: May 11, 1986, 10:22 PM CDT
In force: 45 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Stutsman County, ND

The radar

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

What was reported inside it

Time	Report	Where	Remark
May 11, 10:15 PM CDT	Tornado F0	Stutsman, ND

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.6 hours before the alert went out and 134 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: 296 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 2338 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, May 11, 7:44 PM CDT, 1 hour 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
745 PM CDT SUN MAY 11 1986

AT 745 PM CDT THUNDERSTORMS WERE MOVING ALONG THE NORTHERN TIER OF
SOUTH DAKOTA AND THE SOUTHERN TIER OF NORTH DAKOTA. WIND GUSTS TO
40 MPH WERE REPORTED AT BOWMAN NORTH DAKOTA. THE THUNDERSTORMS WERE
MOVING NORTHEAST AT 25 TO 30 MPH AND COULD PRODUCE VERY HEAVY RAIN..
SMALL HAIL..AND GUSTY SURFACE WIND UP TO 50 MPH.

LATER STATEMENTS WILL BE ISSUED AS NEEDED.
SEAL

Special weather statement, May 11, 8:11 PM CDT, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLISTON ND
810 PM CDT SUN MAY 11 1986

...VERY HEAVY THUNDERSTORMS ARE MOVING INTO WEASTERN NORTH DAKOTA...

AT 805 PM CDT WILLISTON RADAR INDICATED A VERY HEAVY THUNDERSTORM
25 MILES NORTHWEST OF WILLISTON MOVING NORTHEAST AT 40 MILES AN HOUR.
PAST REPORTS ASSOCIATED WITH THIS STORM INDICATED NO SEVERE WEATHER,          ,
HOWEVER, THIS STORM COULD PRODUCE SMALL HAIL, STRONG GUSTY WINDS, HEAVY
RAIN, AND DANGEROUS LIGHTNING.

KENNEDY

Special weather statement, May 11, 8:12 PM CDT, 1 hour 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
810 PM CDT SUN MAY 11 1986

AT 810 PM CDT THUNDERSTORMS WERE MOVING ALONG THE NORTHERN TIER OF
SOUTH DAKOTA AND THE SOUTHERN TIER OF NORTH DAKOTA. ALSO..THUNDERSTORMS
WERE LOCATED NORTHEAST OF JAMESTOWN NORTH DAKOTA. ALL THUNDERSTORMS
WERE MOVING NORTHEAST AT 25 TO 30 MPH AND COULD PRODUCE VERY HEAVY RAIN..
SMALL HAIL..AND GUSTY SURFACE WIND UP TO 50 MPH.

NO REPORTS OF SEVERE WEATHER HAVE BEEN RECEIVED FROM THE WARNED COUNTIES
OF GRANT..SIOUX..AND EMMONS.

LATER STATEMENTS WILL BE ISSUED AS NEEDED.
SEAL

Special weather statement, May 11, 8:37 PM CDT, 1 hour before

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Special weather statement, May 11, 8:48 PM CDT, 49 minutes before

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Special weather statement, May 11, 9:22 PM CDT, 15 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:51 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	30 min
May 11, 7:51 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	30 min
May 11, 8:36 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	45 min
May 11, 9:45 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	45 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.