Alert archive / North Dakota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 28, NWS Bismarck, ND

July 20, 1987Morton County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 20, 1987, 2:53 AM MDT for Morton County, North Dakota. It was in force for 37 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1987, 2:53 AM MDT (08:53 UTC)
Expired
Jul 20, 1987, 3:30 AM MDT
In force
37 min
Issued by
NWS Bismarck, ND
Area
Whole counties

County 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, 8.9 hours before the alert went out and 45 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 1987-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 90 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 1987-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.19395878Sfc1 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
90 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
1852 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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

Local storm report, Jul 19, 9:15 PM MDT, 5 hours 38 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE BISMARCK ND
1015 PM CDT SUN JUL 19 1987

TIME    ZONE    EVENT...LOCATION...REMARKS

805 PM  CDT     PEA SIZE HAIL NEAR AMIDON IN SLOPE COUNTY.

820 PM  CDT     MCARBLE SIZE HAIL...VERY HEAVY RAIN 8 MILES WEST OF
                HETTINGER IN ADAMS COUNTY.

907 PM          GOLFBALL SIZE HAIL  .75 INCH RAIN FELL IN 15 MIN
                AT REGENT IN HETTINGER COUNTY.

TURNER
Special weather statement, Jul 19, 9:16 PM MDT, 5 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLISTON ND
915 PM MDT SUN JUL 19 1987

...STRONG THUNDERSTORMS DEVELOPING IN DUNN AND MOUNTRAIL COUNTIES
IN WESTCENTRAL NORTH DAKOTA...

AT 905 PM MDT WILLISTON RADAR INDICATED A LINE OF THUNDERSTORMS
DEVELOPING FROM MANNING IN DUNN COUNTY TO 10 MILES SOUTH OF PARSHALL
IN MOUNTRAIL COUNTY. THE STRONGEST THUNDERSTORM WAS LOCATED SOUTH
OF PARSHALL.

PERSONS IN THE VICINITY OF THESE STORMS SHOULDD BE PREPARED FOR GUSTY
WINDS...SMALL HAIL...DANGEROUS LIGHTNING STRIKES AND BRIEF HEAVY RAIN.
IF THREATENING WEATHER APPROACHES BE PREPARED TO SEEK SAFE SHELTER.

THE STORMS WERE MOVING TO THE NORTHEAST AT 25 MPH.

NEWKIRK
Local storm report, Jul 20, 1:07 AM MDT, 1 hour 46 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE BISMARCK ND
200 AM CDT MON JUL 20 1987

TIME    ZONE    EVENT...LOCATION...REMARKS

1221 AM CDT     1/2 INCH HAIL AT LINTON (EMMONS COUNTY)
0117 AM CDT     GOLFBAL
L SIZE HAIL REPORTED AT BOWMAN (BOWMAN COUNTY)
0152 AM CDT     1/2 INCH TO 2 INCH HAIL AT ASHLEY (MCINTOSH COUNTY)

LEBLANG
Local storm report, Jul 20, 1:08 AM MDT, 1 hour 45 minutes before
STORM REPORTS
NATIONAL WEATHER SERVICE BISMARCK ND
200 AM CDT MON JUL 20 1987

TIME    ZONE    EVENT...LOCATION...REMARKS

1221 AM CDT     1/2 INCH HAIL AT LINTON (EMMONS COUNTY)
0117 AM CDT     GOLFBALL SIZE HAIL REPORTED AT BOWMAN (BOWMAN COUNTY)
0152 AM CDT     1/2 INCH TO 2 INCH HAIL AT ASHLEY (MCINTOSH COUNTY)

LEBLANG
Special weather statement, Jul 20, 1:26 AM MDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
225 AM CDT MON JUL 20 1987

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTH CENTRAL NORTH DAKOTA
UNTIL 3 AM CDT...
...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHEASTERN NORTH DAKOTA
UNTIL 7 AM CDT...

THE SEVERE THUNDERSTORM WARNING FOR BOWMAN COUNTY IS NO LONGER IN
EFFECT.

VERY INTENSE THUNDERSTORMS CONTINUES OVER SOUTHWESTERN NORTH DAKOTA
AT 230 AM CDT. THE STRONGEST THUNDERSTORMS WERE LOCATED IN SOUTHWEST
HETTINGER COUNTY...ABOUT 15 MILES SOUTH OF NEW ENGLAND OR 30 MILES
SOUTH OF DICKINSON....ANOTHER A FEW MILES NORTHWEST OF NEW LEIPZIG IN
GRANT COUNTY OR 50 MILES SOUTHWEST OF BISMARCK...AND ANOTHER JUST
SOUTHWEST OF ALMONT IN CENTRAL MORTON COUNTY OR 30 MILES SOUTHWEST OF
BISMARCK. ALL OF THESE THUNDERSTORMS WERE MOVING TO THE EAST AT 30
MILES AN HOUR. THEY WERE PRODUCING DANGEROUS LIGHTNING..VERY HEAVY RAIN
AND COULD PRODUCE LARGE HAIL AND STRONG GUSTY WINDS.

THIS AREA HAS BEEN SATURATED WITH RAIN AND FLOODING OF LOW LYING AREAS
IS POSSIBLE.

AGAIN...THESE STORMS HAVE THE POTENTIAL OF SEVERE WEATHER AND PERSONS
IN SOUTHWEST NORTH DAKOTA SHOULD KEEP ALERT FOR RAPID WEATHER CHANGES.
KAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 7:17 PM MDTSevere Thunderstorm WarningBISAdams58 min
Jul 19, 8:22 PM MDTTornado WarningBISAdams, Sioux38 min
Jul 19, 8:58 PM MDTTornado WarningBISSioux32 min
Jul 19, 9:02 PM MDTSevere Thunderstorm WarningBISGrant58 min
Jul 19, 9:34 PM MDTTornado WarningBISAdams26 min
Jul 19, 9:46 PM MDTSevere Thunderstorm WarningBISSioux59 min
Jul 19, 10:48 PM MDTSevere Thunderstorm WarningBISEmmons72 min
Jul 19, 10:52 PM MDTSevere Thunderstorm WarningBISSioux68 min
Jul 19, 11:58 PM MDTSevere Thunderstorm WarningBISEmmons, Logan, McIntosh62 min
Jul 20, 12:25 AM MDTSevere Thunderstorm WarningBISBowman65 min
Jul 20, 1:31 AM MDTTornado WarningBISHettinger29 min
Jul 20, 1:46 AM MDTSevere Thunderstorm WarningBISHettinger29 min
Jul 20, 2:15 AM MDTSevere Thunderstorm WarningBISGrant, Hettinger, Slope60 min
Jul 20, 2:15 AM MDTSevere Thunderstorm WarningBISBowman60 min
Jul 20, 3:17 AM MDTSevere Thunderstorm WarningBISAdams, Hettinger58 min
Jul 20, 4:07 AM MDTSevere Thunderstorm WarningBISGrant68 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1987Every severe thunderstorm warning in 1987

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.