Alert archive / North Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 1, NWS Grand Forks, ND

May 7, 1993Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 7, 1993, 7:15 PM CDT for Cass County, North Dakota. It was in force for 60 min.

The area

The counties it named.

The facts

Issued: May 7, 1993, 7:15 PM CDT (00:15 UTC)
Expired: May 7, 1993, 8:15 PM CDT
In force: 60 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Cass County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 263 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: 12 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1429 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 39 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, May 7, 5:46 PM CDT, 1 hour 29 minutes before

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Special weather statement, May 7, 6:01 PM CDT, 1 hour 14 minutes before

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Special weather statement, May 7, 6:42 PM CDT, 33 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-070045-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE FARGO ND
640 PM CDT FRI MAY 7 1993

AT 630 PM CDT...STRONG THUNDERSTORMS CONTINUED TO DEVELOP OVER SOUTHEAST
NORTH DAKOTA. THE STRONGEST STORM WAS LOCATED 20 MILES SOUTHWEST OF
FARGO WEST OF KINDRED. THIS STORM IS CAPABLE OF PRODUCING VERY HEAVY
RAINS...STRONG WINDS AND HAIL. MOVEMENT WAS TO THE NORTH AT AROUND
40 MILES AN HOUR...AND THE STORM WILL MOVE INTO THE CHAFFEE...
CASSELTON...AND BUFFALO AREAS BY 7 PM.

ANOTHER STRONG STORM WAS LOCATED 15 MILES SOUTHWEST OF WAHPETON.
STRONG WINDS AND HAIL ARE ALSO POSSIBLE WITH THIS STORM.

ELSEWHERE...SHOWERS AND THUNDERSTORMS EXTENDED FROM EASTERN SOUTH DAKOTA
UP INTO NORTHWEST MINNESOTA. MOVEMENT OF ALL THE PRECIPITATION WAS TO
THE NORTH AT 40 MILES AN HOUR.  PERSONS SHOULD BE PREPARED TO TAKE COVER
IF THREATENING WEATHER APPROACHES.  STAY TUNED TO LOCAL RADIO AND TELEVISION
STATIONS...AS WELL AS NOAA WEATHER RADIO FOR LATER STATEMENTS.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 8:47 PM CDT	Severe Thunderstorm Warning	FGF	Walsh	43 min
May 7, 9:09 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	36 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.