Alert archive / North Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 37, NWS Bismarck, ND

July 18, 1993McLean County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 18, 1993, 4:28 PM CDT for McLean County, North Dakota. It was in force for 62 min.

The area

The counties it named.

The facts

Issued: Jul 18, 1993, 4:28 PM CDT (21:28 UTC)
Expired: Jul 18, 1993, 5:30 PM CDT
In force: 62 min
Issued by: NWS Bismarck, ND
Area: Whole counties

County McLean County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.5 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: 41 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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 18, 1:52 PM CDT, 2 hours 36 minutes before

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Special weather statement, Jul 18, 1:54 PM CDT, 2 hours 34 minutes before

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Special weather statement, Jul 18, 2:19 PM CDT, 2 hours 9 minutes before

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Special weather statement, Jul 18, 2:41 PM CDT, 1 hour 47 minutes before

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Special weather statement, Jul 18, 3:23 PM CDT, 1 hour 5 minutes before

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Special weather statement, Jul 18, 4:11 PM CDT, 17 minutes before

NDZ001-018-182230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
410 PM CDT SUN JUL 18 1993

...A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM CDT FOR MOST OF
CENTRAL NORTH DAKOTA AND A SEVERE THUNDERTORM WATCH HAS BEEN ISSUED
FOR EASTERN NORTH DAKOTA UNTIL 10 PM CDT...

AT 410 PM CDT WEATHER RADARS INDICATED A LINE OF STRONG THUNDERSTORMS
THAT EXTENDED FROM NORTH OF DEVILS LAKE TO SOUTHEAST OF BISMARCK. THE
LINE WAS MOVING TO THE EAST AT 35 MPH. SOME OF THE THUNDERSTORMS
CONTAINED VERY HEAVY RAIN...SMALL HAIL AND STRONG GUSTY WINDS.

THIS LINE WILL BE IN THE DEVILS LAKE AREA BY 430 PM...AND THE JAMESTOWN
AREA AROUND 5 PM.

A SECOND LINE OF THUNDERSTORMS EXTENDED FROM NORTHWEST OF MINOT NEAR
THE CANADIAN BORDER...SOUTHWARD TO CENTRAL LAKE SAKAKAWEA. THIS LINE OF
STRONG THUNDERSTORMS WAS ALSO MOVING TO THE EAST AT 35 MPH.

THIS LINE OF THUNDERSTORMS WILL BE IN THE MINOT AREA BY 430 PM.

ALL OF THESE THUNDERSTORMS HAVE THE POTENTIAL OF PRODUCING LARGE HAIL...
DAMAGING WINDS AND POSSIBLY TORNADOES.

AS THUNDERSTORMS APPROACH...BE PREPARED TO TAKE SHELTER.

TO REPORT SEVERE WEATHER...CALL YOUR NEAREST LAW ENFORCEMENT AGENCY
AND HAVE THEM RELAY THE INFORMATION TO STATE RADIO.

KAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 1:22 PM CDT	Tornado Warning	BIS	Williams	38 min
Jul 18, 1:34 PM CDT	Severe Thunderstorm Warning	BIS	Ward	26 min
Jul 18, 1:53 PM CDT	Severe Thunderstorm Warning	BIS	Williams	37 min
Jul 18, 3:24 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	66 min
Jul 18, 3:42 PM CDT	Severe Thunderstorm Warning	BIS	McLean	48 min
Jul 18, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Wells	54 min
Jul 18, 6:56 PM CDT	Severe Thunderstorm Warning	BIS	Sheridan	24 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1993 Every severe thunderstorm warning 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.