Alert archive / North Dakota / Tornado Warnings in 1993

Tornado Warning 4, NWS Bismarck, ND

July 1, 1993Pierce County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 1, 1993, 1:26 PM CDT for Pierce County, North Dakota. It was in force for 34 min.

The area

The counties it named.

The facts

Issued: Jul 1, 1993, 1:26 PM CDT (18:26 UTC)
Expired: Jul 1, 1993, 2:00 PM CDT
In force: 34 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County Pierce County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 6.4 hours before the alert went out and 173 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: 130 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 1162 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBIS 011826
TORBIS
NDC069-011900-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE BISMARCK ND
126 PM CDT THU JUL 1 1993

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 200 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY

   IN THE NORTH CENTRAL PART OF NORTH DAKOTA
      SOUTHERN PIERCE

AT 120 PM CDT A TORNADO WAS REPORTED 2 MILES EAST OF ANAMOOSE...
50 MILES EAST SOUTHEAST OF MZINOT MOVING EAST AT 20 MILES AN HOUR.

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 AND MOBILE HOMES.

 RJR

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, Jul 1, 8:52 AM CDT, 4 hours 34 minutes before

NDZ001>011-011600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
850 AM CDT THU JUL 1 1993

...SHOWERS AND THUNDERSTORMS WESTERN NORTH DAKOTA...

AT 845 AM CDT...A LARGE AREA OF SHOWERS AND ISOLATED THUNDERSTORMS
WERE OCCURRING OVER WESTERN NORTH DAKOTA. THE PRECIPITATION WAS IN A
50 MILE BAND STRETCHING FROM WILLISTON SOUTHWARD THROUGH DICKINSON INTO
NORTHWEST SOUTH DAKOTA.

ALL OF THE ACTIVITY WAS MOVING EAST AT 25 MILES AN HOUR.

Special weather statement, Jul 1, 1:05 PM CDT, 21 minutes before

NDZ002>003-005-011900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLISTON ND
105 PM CDT THU JUL 1 1993

...THUNDERSTORMS MOVING INTO NORTHWEST NORTH DAKOTA...

AT 100 PM CDT...WILLISTON RADAR INDICATED A THUNDERSTORM 20 MILES WEST
OF WILLISTON. THE STORM WAS MOVING TO THE NORTHEAST AT 25 MILES AND HOUR
AND WILL BE IN THE WILLISTON AREA AROUND 130 PM CDT.

OTHER THUNDERSTORMS WERE ALSO DEVELOPING NEAR THE TOWN OF SIDNEY IN
EASTERM MONTANA. THESE STORMS WERE MOVING TO THE NORTHEAST AT 25 MILES
AN HOURS.

THESE STORMS WILL LIKELY CONTAIN BRIEF HEAVY RAIN...GUSTY WINDS...SMALL
HAIL AND DANGEROUS LIGHTNING.

IF THESE THUNDERSTORMS APPROACH YOUR AREA...SEEK SHELTER INDOORS.

RICHMOND

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 1:55 PM CDT	Tornado Warning	BIS	Wells	18 min
Jul 1, 3:11 PM CDT	Tornado Warning	BIS	Burleigh, Kidder	34 min
Jul 1, 3:42 PM CDT	Tornado Warning	BIS	Towner	30 min
Jul 1, 5:42 PM CDT	Severe Thunderstorm Warning	BIS	Morton	48 min
Jul 1, 5:52 PM CDT	Severe Thunderstorm Warning	BIS	Oliver	68 min
Jul 1, 6:15 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	60 min

Nearby

Tornado Warnings in North Dakota, 1993 Every tornado warning in 1993 Tornadoes in 1993

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.