Alert archive / North Dakota / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 2, NWS Grand Forks, ND

May 7, 1993Walsh County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 7, 1993, 8:47 PM CDT for Walsh County, North Dakota. It was in force for 43 min.

The area

The counties it named.

The facts

Issued: May 7, 1993, 8:47 PM CDT (01:47 UTC)
Expired: May 7, 1993, 9:30 PM CDT
In force: 43 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Walsh County, ND

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.8 hours before the alert went out and 286 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

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

000 
TTAA00 KFAR 080148 RRA
SVRFAR
NDC099-080230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FARGO ND
847 PM CDT FRI MAY 7 1993
 
THE NATIONAL WEATHER SERVICE IN FARGO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  930 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST NORTH DAKOTA
 
   ...EASTERN WALSH COUNTY
   ...THE CITY OF GRAFTON
 
AT 845 PM CDT...GOLFBALL SIZED HAIL WAS REPORTED BY LAW ENFORCEMENT
OFFICIALS 2 MILES SOUTH OF MINTO...OR 10 MILES SOUTH OF GRAFTON.
 
MOVEMENT WAS TO THE NORTH AT 40 MILES AN HOUR...AND THE STORM WILL
AFFECT THE GRAFTON AREA BY 9 PM.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
 
WELVAERT
 
&

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, 6:42 PM CDT, 2 hours 5 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.

Local storm report, May 7, 8:17 PM CDT, 30 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
817 PM CDT FRI MAY 7 1993

TIME      EVENT
713 PM    QUARTER SIZED HAIL REPORTED BY SPOTTER WEST OF HORACE ND...
          CASS COUNTY...

713 PM    3/4 INCH HAIL REPORTED BY OFF DUTY WEATHER SERVICE EMPLOYEE
          AT DAVENPORT ND...CASS COUNTY...

737 PM    55 MPH WINDS WITH SMALL BRANCHES DOWN REPORTED BY HAM SPOTTER
          NEAR MAPLETON ND...CASS COUNTY...

WELVAERT/DM

Local storm report, May 7, 8:17 PM CDT, 30 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
817 PM CDT FRI MAY 7 1993

TIME      EVENT
713 PM    QUARTER SIZED HAIL REPORTED BY SPOTTER WEST OF HORACE ND...
          CASS COUNTY...

713 PM    3/4 INCH HAIL REPORTED BY OFF DUTY WEATHER SERVICE EMPLOYEE
          AT DAVENPORT ND...CASS COUNTY...

737 PM    55 MPH WINDS WITH SMALL BRANCHES DOWN REPORTED BY HAM SPOTTER
          NEAR MAPLETON ND...CASS COUNTY...

WELVAERT/DM

Local storm report, May 7, 8:33 PM CDT, 14 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
833 PM CDT FRI MAY 7 1993

TIME      EVENT
CDT
745 PM    1 INCH HAIL REPORTED BY A COOP OBSERVER 6 MILES EAST OF
          ARTHUR ND IN CASS COUNTY...
DM

WWUS30KFAR+

Local storm report, May 7, 8:33 PM CDT, 14 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
833 PM CDT FRI MAY 7 1993

TIME      EVENT
CDT
745 PM    1 INCH HAIL REPORTED BY A COOP OBSERVER 6 MILES EAST OF
          ARTHUR ND IN CASS COUNTY...
DM

WWUS30KFAR+

Special weather statement, May 7, 8:42 PM CDT, 5 minutes before

NDZ012-013-014-015-016-017-018-MNZ001-006-007-010-011-013-080245-

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

AT 830 PM...STRONG THUNDERSTORMS CONTINUED OVER EAST CENTRAL NORTH
DAKOTA. THE STRONGEST STORM WAS LOCATED 20 MILES WEST OF GRAND FORKS
NORTH DAKOTA. STRONG WINDS...VERY HEAVY RAIN...AND SMALL HAIL ARE ALL
POSSIBLE WITH THIS STORM.

ELSEWHERE...SHOWERS AND THUNDERSTORMS CONTINUED FROM NORTHEAST SOUTH
DAKOTA AND SOUTHWEST MINNESOTA...NORTHWARD TO THE CANADIAN BORDER
AROUND THE PEMBINA AREA.

MOVEMENT WAS TO THE NORTH AT AROUND 40 MILES AN HOUR.

PERSONS OVER NORTHEAST NORTH DAKOTA SHOULD REMAIN ALERT FOR THREATENING
WEATHER CONDITIONS...AND TAKE COVER IF STORMS APPROACH. STAY TUNED TO
LOCAL TELEVISION AND RADIO STATIONS...AS WELL AS NOAA WEATHER RADIO
FOR LATER STATEMENTS.
WELVAERT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 7:15 PM CDT	Severe Thunderstorm Warning	FGF	Cass	60 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.