Alert archive / North Dakota / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 36, NWS Bismarck, ND

July 11, 1989Mercer County, Morton County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 11, 1989, 9:55 PM MDT for Mercer County, Morton County, North Dakota. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Jul 11, 1989, 9:55 PM MDT (03:55 UTC)
Expired: Jul 11, 1989, 10:30 PM MDT
In force: 35 min
Issued by: NWS Bismarck, ND
Area: Whole counties

Counties Mercer County, ND, Morton County, ND

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

Bismarck Municip, ND (KBIS), launched 00:00Z, 3.9 hours before the alert went out and 70 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: 512 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1864 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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, Jul 11, 6:39 PM MDT, 3 hours 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
740 PM CDT TUE JUL 11 1989

...SEVERE THUNDERSTORM WARNING FOR WARD COUNTY INCLUDING THE CITY
OF MINOT UNTIL 8 PM CDT...

AT 740 PM CDT A SEVERE THUNDERSTORM WAS MOVING THROUGH THE CITY OF
MINOT. THIS STORM WAS MOVING SOUTHEAST AT 25 MPH AND WILL BE OUT OF
MINOT BY 8 PM CDT.

THIS STORM WILL PRODUCE LARGE HAIL...HEAVY RAIN...FREQUENT CLOUD TO
GROUND LIGHTNING AND WINDS GUSTING TO OVEXR 60 MPH.

AT 721 PM CDT WINDS WERE GUSTING TO 58 MPH AT THE MINOT AIRPORT.

AT 726 PM CDT WINDS DOWNED TREES IN BURLINGTON OR ABOUT 8 MILES
NORTHWEST OF MINOT.

MCMULLEN

Special weather statement, Jul 11, 6:50 PM MDT, 3 hours 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLISTON ND
750 PM CDT TUE JUL 11 1989

...SEVERE THUNDERSTORMS CONTINUE OVER NORTHWEST NORTH DAKOTA...

  SEVERE THUNDERSTORM WARNINGS REMAIN IN EFFECT FOR SOUTHWEST
MOUNTRAIL COUNTY UNTIL 815 PM CDT AND FOR SOUTHERN WILLIAMS AND
NORTHERN MCKENZIE COUNTIES UNTIL 830 PM CDT.
  AT 745 PM CDT SEVERE THUNDERSTORMS WERE 20 MILES SOUTHEAST OF WILLISTON
AND 5 MILES NORTHWEST OF NEW TOWN MOVING SOUTHEAST AT 25 MILES AN HOUR.
  HAIL UP TO 1 INCH AND WIND GUSTS TO NEAR 65 MILES AN HOUR WERE
PRODUCED BY THE SEVERE THUNDERSTORM THAT PASS THROUGH THE WILLISTON
AREA.
 THESE ARE DANGEROUS THUNDERSTORMS. IF THEY APPROACH YOUR AREA GO TO
A SAFE SHELTERi.

KENNEDY

Special weather statement, Jul 11, 7:11 PM MDT, 2 hours 44 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
810 PM CDT TUE JUL 11 1989

...SEVERE THUNDERSTORM WATCH FOR MUCH OF WESTERN AND CENTRAL NORTH
DAKOTA UNTIL 1 AM CDT...

AT 810 PM CDT A THUNDERSTORM WAS LOCATED IN WESTERN MCHENRY COUNTY
12 MILES SOUTHEAST OF MINOT. THE THUNDERSTORM WAS LOCATED BETWEEN
GRANVILLE...KARLSRUHE AND VELVA AND HEADING FOR THE TOWN OF KARLSRUHE.

THIS THUNDERSTORM UPROOTED TREES...DISRUPTED POWER...PRODUCED LARGE
HAIL AND WIND GUSTING TO NEAR 60 MPH IN MINOT. DURING THE PAST 15
MINUTES THE STORM HAS DECREASED RAPIDLY IN INTENSITY.

THE THUNDERSTORM WILL MOVE INTO THE TOWN OF KARLSRUHE BETWEEN 830 AND
9 PM CDT. IT WILL LIKELY PRODUCE VERY HEAVY RAIN...HAIL AND GUSTY
WINDS.
VAN ESS

Special weather statement, Jul 11, 8:08 PM MDT, 1 hour 47 minutes before

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Special weather statement, Jul 11, 8:35 PM MDT, 1 hour 20 minutes before

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Local storm report, Jul 11, 9:18 PM MDT, 37 minutes before

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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 6:09 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail	66 min
Jul 11, 6:21 PM MDT	Severe Thunderstorm Warning	BIS	Ward	39 min
Jul 11, 6:24 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Williams	66 min
Jul 11, 7:28 PM MDT	Severe Thunderstorm Warning	BIS	Mountrail	32 min
Jul 11, 7:40 PM MDT	Severe Thunderstorm Warning	BIS	McHenry	35 min
Jul 11, 7:42 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	48 min
Jul 11, 7:52 PM MDT	Severe Thunderstorm Warning	BIS	McLean	68 min
Jul 11, 8:07 PM MDT	Tornado Warning	BIS	McHenry	23 min
Jul 11, 8:34 PM MDT	Severe Thunderstorm Warning	BIS	Dunn	56 min
Jul 11, 10:10 PM MDT	Severe Thunderstorm Warning	BIS	Grant	65 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1989 Every severe thunderstorm warning in 1989

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.