Alert archive / North Dakota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 39, NWS Bismarck, ND

June 21, 1994McLean County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 21, 1994, 7:29 PM CDT for McLean County, North Dakota. It was in force for 46 min.

The area

The counties it named.

The facts

Issued: Jun 21, 1994, 7:29 PM CDT (00:29 UTC)
Expired: Jun 21, 1994, 8:15 PM CDT
In force: 46 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County McLean County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.5 hours before the alert went out and 104 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: 1250 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1872 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 8.4

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KBIS 220030 RRA
SVRBIS
NDC055-220115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
729 PM CDT TUE JUN 21 1994
 
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL NORTH DAKOTA
 
   ...SOUTHEASTERN MCLEAN COUNTY
 
AT 725 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES NORTH OF
BISMARCK OR 5 MILES NORTH OF WASHBURN. THE THUNDERSTORM WAS MOVING EAST
AT 15 MPH. TORRENTIAL RAIN AND LARGE HAIL ARE LIKELY FROM THIS
THUNDERSTORM.
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
 
 
VAN ESS

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 21, 7:12 PM CDT, 17 minutes before

NDZ021-220115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
712 PM CDT TUE JUN 21 1994

AT 7 PM CDT A STRONG THUNDERSTORM WAS LOCATED 40 MILES NORTH OF
BISMARCK OR 6 MILES NORTH OF WASHBURN. THE THUNDERSTORM WAS MOVING
EAST AT 15 MPH.

THE THUNDERSTORM WILL CONTAIN EXTREMELY HEAVY RAIN WITH FLOODING OF
ROADS AND LOW LYING AREAS LIKELY. THE THUNDERSTORM MAY ALSO CONTAIN
HAIL.

IF YOU LIVE IN SOUTHERN MCLEAN COUNTY...MONITOR WEATHER CONDITIONS AND
TAKE SHELTER IF THREATENING WEATHER MOVES IN YOUR DIRECTION.
IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A
STORM APPROACHES.  MOTORISTS SHOULD REMAIN ALERT FOR REDUCED
VISIBILITIES DURING DOWNPOURS OF RAIN.  STREETS MAY FLOOD QUICKLY.

VAN ESS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 8:09 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	66 min
Jun 22, 3:34 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh	56 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1994 Every severe thunderstorm warning in 1994

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.