Alert archive / North Dakota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 70, NWS Grand Forks, ND

August 23, 1994Cass County, Richland County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 23, 1994, 10:29 AM CDT for Cass County, Richland County, North Dakota. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
Aug 23, 1994, 10:29 AM CDT (15:29 UTC)
Expired
Aug 23, 1994, 11:30 AM CDT
In force
61 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

Counties Cass County, ND, Richland County, ND

The nearest sounding before it

Aberdeen, SD (KHON), launched 12:00Z, 3.5 hours before the alert went out and 214 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, Aberdeen, SD at 12:00Z on 1994-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 82 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, Aberdeen, SD at 12:00Z on 1994-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 231 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
82 J/kg
Mixed-layer CIN
-829 J/kg
Mixed-layer LCL
1515 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
231 m²/s²
0-3 km storm-relative helicity
183 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, Aug 23, 4:35 AM CDT, 5 hours 54 minutes before
NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-231035-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
435 AM CDT TUE AUG 23 1994

...ISOLATED STRONG THUNDERSTORMS CONTINUE OVER VALLEY REGION...

AT 425 AM CDT...A DIMINISHING AREA OF SHOWERS AND THUNDERSTORMS...SOME OF
THEM STRONG...CONTINUED OVER NORTHWEST AND WEST CENTRAL MINNESOTA AND A
SMALL PART OF SOUTHEAST NORTH DAKOTA.  THE STRONGEST THUNDERSTORMS
WERE 10 MILES EAST OF FARGO NEAR GLYNDON MINNESOTA...20 MILES WEST OF
DETROIT LAKES NEAR ROLLAG AND 30 MILES WEST OF BRAINERD NEAR STAPLES.

MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.

AS THE THUNDERSTORMS PASSED JUST SOUTHEAST OF THE F/M AREA WINDS GUSTED
TO 40 MPH.  THESE STRONGER THUNDERSTORMS WILL PRODUCE WIND GUSTS TO NEAR
50 MILES AN HOUR...SOME HAIL AND BRIEF TORRENTIAL RAINS.  CAMPERS...
BOATERS AND OTHERS OUT-OF-DOORS IN THE LAKES REGION SHOULD BE ON THE
ALERT FOR THESE STRONGER STORMS AND SEEK SAFE SHELTER AS NEEDED.
EWENS
Special weather statement, Aug 23, 4:36 AM CDT, 5 hours 53 minutes before
NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-231035-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
435 AM CDT TUE AUG 23 1994

...ISOLATED STRONG THUNDERSTORMS CONTINUE OVER VALLEY REGION...

AT 425 AM CDT...A DIMINISHING AREA OF SHOWERS AND THUNDERSTORMS...SOME OF
THEM STRONG...CONTINUED OVER NORTHWEST AND WEST CENTRAL MINNESOTA AND A
SMALL PART OF SOUTHEAST NORTH DAKOTA.  THE STRONGEST THUNDERSTORMS
WERE 10 MILES EAST OF FARGO NEAR GLYNDON MINNESOTA...20 MILES WEST OF
DETROIT LAKES NEAR ROLLAG AND 30 MILES WEST OF BRAINERD NEAR STAPLES.

MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.

AS THE THUNDERSTORMS PASSED JUST SOUTHEAST OF THE F/M AREA WINDS GUSTED
TO 40 MPH.  THESE STRONGER THUNDERSTORMS WILL PRODUCE WIND GUSTS TO NEAR
50 MILES AN HOUR...SOME HAIL AND BRIEF TORRENTIAL RAINS.  CAMPERS...
BOATERS AND OTHERS OUT-OF-DOORS IN THE LAKES REGION SHOULD BE ON THE
ALERT FOR THESE STRONGER STORMS AND SEEK SAFE SHELTER AS NEEDED.
EWENS
Special weather statement, Aug 23, 8:35 AM CDT, 1 hour 54 minutes before
NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-231435-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
835 AM CDT TUE AUG 23 1994

...SCATTERED THUNDERSTORMS CONTINUE OVER SOUTHEAST NORTH DAKOTA...

AT 825 AM CDT...AN AREA OF SHOWERS AND THUNDERSTORMS...A FEW WITH HEAVY
RAIN...CONTINUED OVER SOUTHEAST NORTH DAKOTA.

THE THUNDERSTORMS WERE SCATTERED OVER A 100 MILE WIDE BAND FROM THE
SOUTH DAKOTA BORDER SOUTH OF JAMESTOWN TO NEAR VALLEY CITY.  THE
STRONGEST STORM WAS LOCATED BETWEEN LA MOURE AND VERONA IN SOUTHEAST
LA MOURE COUNTY OR 80 MILES SOUTHEAST OF FARGO. THE PRECIPITATION WAS
MOVING NORTHEAST AT 35 TO 40 MPH.

THESE STORMS MAY PRODUCE BRIEF HEAVY RAIN...DANGEROUS LIGHTNING AND
GUSTY WINDS. IF YOU ARE IN OR NEAR THE PATH OF THESE STORMS BE PREPARED
TO TAKE SHELTER UNTIL THE STORMS PASS.
HW
Special weather statement, Aug 23, 8:39 AM CDT, 1 hour 50 minutes before
NDZ007-008-016-026>030-038-039-048-049-051>053-MNZ001>004-
007>009-013>017-022>024-027>032-039>041-047-231435-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
835 AM CDT TUE AUG 23 1994

...SCATTERED THUNDERSTORMS CONTINUE OVER SOUTHEAST NORTH DAKOTA...

AT 825 AM CDT...AN AREA OF SHOWERS AND THUNDERSTORMS...A FEW WITH HEAVY
RAIN...CONTINUED OVER SOUTHEAST NORTH DAKOTA.

THE THUNDERSTORMS WERE SCATTERED OVER A 100 MILE WIDE BAND FROM THE
SOUTH DAKOTA BORDER SOUTH OF JAMESTOWN TO NEAR VALLEY CITY.  THE
STRONGEST STORM WAS LOCATED BETWEEN LA MOURE AND VERONA IN SOUTHEAST
LA MOURE COUNTY OR 80 MILES SOUTHEAST OF FARGO. THE PRECIPITATION WAS
MOVING NORTHEAST AT 35 TO 40 MPH.

THESE STORMS MAY PRODUCE BRIEF HEAVY RAIN...DANGEROUS LIGHTNING AND
GUSTY WINDS. IF YOU ARE IN OR NEAR THE PATH OF THESE STORMS BE PREPARED
TO TAKE SHELTER UNTIL THE STORMS PASS.
HW
Local storm report, Aug 23, 10:14 AM CDT, 15 minutes before
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Local storm report, Aug 23, 10:15 AM CDT, 14 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 9:35 AM CDTSevere Thunderstorm WarningFGFRansom, Sargent55 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1994Every 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.