Alert archive / North Dakota / Tornado Warnings in 1991

Tornado Warning 4, NWS Bismarck, ND

May 31, 1991Burleigh County, North Dakota

NWS Bismarck, ND issued this tornado warning at May 31, 1991, 12:45 AM CDT for Burleigh County, North Dakota. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
May 31, 1991, 12:45 AM CDT (05:45 UTC)
Expired
May 31, 1991, 1:10 AM CDT
In force
25 min
Issued by
NWS Bismarck, ND
Area
Whole counties

County Burleigh County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.8 hours before the alert went out and 29 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, Bismarck Municip, ND at 00:00Z on 1991-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 470 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 1991-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.193958Sfc1 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
470 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1822 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 310545
TORBIS
NDC015-310615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE BISMARCK ND
1245 AM CDT FRI MAY 31 1991

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 115 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE CENTRAL PART OF NORTH DAKOTA
      NORTHERN BURLEIGH

AT 1243 AM CDT WEATHER RADAR INDICATED A POSSIBLE TORNADO 10
MILES NORTH OF BISMARCK MOVING NORTH AT 30 MPH.

THE TOWN OF BALDWIN IS NEAR THE PATH OF THIS STORM.

IF YOU ARE IN THE PATH OF THIS TORNADO...GO TO A BASEMENT SHELTER
IF AVAILABLE...OTHERWISE TO A CENTRAL INTERIOR ROOM ON THE LOWEST
FLOOR...STAY AWAY FROM WINDOWS.  ABANDON CARS rAND MOBILE HOMES.

 RSL

What forecasters said that day

The local office's own words before this tornado 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 30, 7:08 PM CDT, 5 hours 37 minutes before
NDZ003-004-006-007-008-310100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
708 PM CDT THU MAY 30 1991

...THUNDERSTORMS IN CENTRAL AND SOUTHWEST NORTH DAKOTA...

AT 700 PM CDT...BISMARCK RADAR SHOWED A LARGE AREA OF SCATTERED
SHOWERS AND THUNDERSTORMS FROM DICKINSON TO THE EAST END OF LAKE
SAKAKAWEA TO BISMARCK TO LEMMON SOUTH DAKOTA TO DICKINSON.

TWO STRONG STORMS WERE LOCATED 40 MILES AND 60 MILES SOUTHWEST OF
BISMARCK...OR NEAR THE EAST AND WEST ENDS OF LAKE TSCHIDA. THESE STORMS
CONTAINED HEAVY RAIN AND POSSIBLE HAIL. THEY WERE MOVING VERY SLOW
TO THE NORTH.

IN THE SOUTHWEST TIP OF THE STATE...THUNDERSTORMS WERE WEAKENING AS THEY
MOVED FROM SOUTH DAKOTA INTO BOWMAN COUNTY JUST EAST OF THE CITY OF
BOWMAN.
<
LM
Special weather statement, May 30, 8:29 PM CDT, 4 hours 16 minutes before
NDZ003-004-005-006-007-008-009-010-310200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
820 PM CDT THU MAY 30 1991

...THUNDERSTORMS IN CENTRAL AND SOUTHWEST NORTH DAKOTA...

AT 810 PM CDT...BISMARCK RADAR SHOWED A BAND OF SHOWERS AND
THUNDERSTORMS ABOUT 50 MILES WIDE EXTENDING FROM 20 MILES EAST OF
BOTTINEAU TO THE EAST END OF LAKE SAKAKAWEA TO 50 MILES WEST OF
BISMARCK TO 65 MILES SOUTH OF DICKINSON.

THERE WERE A FEW VERY STRONG STORMS IN THIS BAND. ONE WAS LOCATED
50 MILES WEST OF BISMARCK NEAR GLEN ULLIN. THIS STORM HAD VERY HEAVY
RAIN AND POSSIBLE HAIL.

THE SECOND STRONG STORM WAS 65 MILES NORTHWEST OF BISMARCK NEAR
GARRISON DAM...AND THE THIRD STRONG STORM WAS LOCATED ABOUT 45 MILES
SOUTH OF MINOT. ALL OF THESE STORMS WERE MOVING NORTH AT 15 MPH.
>
LM
Special weather statement, May 30, 10:05 PM CDT, 2 hours 40 minutes before
NDZ003-004-005-006-007-008-009-010-310400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1005 PM CDT THU MAY 30 1991

...THUNDERSTORMS IN WESTERN NORTH DAKOTA...

AT 1005 PM CDT...BISMARCK RADAR SHOWED A BROAD BAND OF SHOWERS AND
THUNDERSTORMS. IT WAS 50 MILES WIDE AND THE CENTER OF THE BAND EXTENDED
FROM MINOT TO 30 MILES WEST OF BISMARCK TO 70 MILES SOUTHEAST OF
DICKINSON.

THERE WERE A FEW VERY STRONG STORMS IN THIS BAND JUST WEST OF THE
BISMARCK/MANDAN AREA. ONE WAS 35 MILES NORTHWEST OF BISMARCK OR 10
MILES SOUTH OF CENTER. THE SECOND WAS 25 MILES WEST OF BISMARCK NEAR
ALMONT...AND THE THIRD WAS 35 MILES SOUTHWEST OF BISMARCK OR 5 MILES
NORTHWEST OF CARSON. THESE STORMS CONTAINED HEAVY RAIN AND POSSIBLE
HAIL. THEY WERE MOVING NORTHEAST AT 20 MPH.

LM
Special weather statement, May 30, 11:43 PM CDT, 1 hour 2 minutes before
NDZ005-006-007-008-009-010-012-015-016-310400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1140 PM CDT THU MAY 30 1991

...THUNDERSTORMS IN CENTRAL AND NORTHEAST NORTH DAKOTA...

AT 1132 PM CDT...BISMARCK RADAR SHOWED VERY STRONG THUNDERSTORMS IN
NORTHEAST NORTH DAKOTA. THEY WERE IN A BAND 20 MILES WIDE FROM THE
CANADIAN BORDER 70 MILES NORTHEAST OF DEVILS LAKE TO A POINT NEAR
FILLMORE...ABOUT 40 MILES WEST OF DEVILS LAKE. ONE VERY STRONG
THUNDERSTORM WAS LOCATED IN SOUTHWEST TOWNER COUNTY ABOUT 40 MILES
NORTHWEST OF DEVILS LAKE. THIS STORM HAD VERY HEAVY RAIN AND POSSIBLE
HAIL.

OTHER LESS INTENSE STORMS WERE IN THE SOUTH CENTRAL.  THEY WERE IN A
LINE FROM 30 MILES NORTH OF BISMARCK TO MANDAN TO 60 MILES SOUTH OF
BISMARCK. THESE STORMS LIKELY CONTAINED BRIEF HEAVY RAIN AND SMALL
HAIL.
<
LM
Special weather statement, May 31, 12:01 AM CDT, 44 minutes before
NDZ006-007-007-008-011-310600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1200 AM CDT FRI MAY 31 1991

...STRONG THUNDERSTORMS MOVING INTO THE BISMARCK/MANDAN AREA...

AT 1155 PM CDT WEATHER RADAR INDCATED A LINE OF STRONG THUNDERSTORMS
15 MILES SOUTH OF BISMARCK MOVING NORTH AT 35 MPH. THE THUNDERSTORMS
WILL MOVE THROUGH THE BISMARCK/MANADAN AREA BETWEEN 1210 AM AND 1 AM
CDT.

WINDS TO 50 MPH...SMALL HAIL...VERY HEAVY RAIN..7.AND DANGEROUS
LIGHTNING WILL ACCOMPANY THESE STORMS.

BE PREPARED TO TAKE SHELTER AS THESE THUNDERSTORMS APPROACH.

LEBLANG

The office that day

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

IssuedProductOfficeCountiesLasted
May 30, 10:43 PM CDTTornado WarningBISRamsey, Towner47 min

Nearby

Tornado Warnings in North Dakota, 1991Every tornado warning in 1991Tornadoes in 1991

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.