Alert archive / North Dakota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 65, NWS Grand Forks, ND

August 18, 1994Walsh County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 18, 1994, 7:39 PM CDT for Walsh County, North Dakota. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Aug 18, 1994, 7:39 PM CDT (00:39 UTC)
Expired
Aug 18, 1994, 8:45 PM CDT
In force
66 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, 0.7 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1994-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 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, Bismarck Municip, ND at 00:00Z on 1994-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939587897Sfc1 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
837 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
1855 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS1 KFAR 190039 RRA
SVRFAR
NDC099-190145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE FARGO ND
739 PM CDT THU AUG 18 1994

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 845 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE NORTHEAST PART OF NORTH DAKOTA
      WALSH

AT 740 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM OVER WALSH
COUNTY OF NORTHEAST NORTH DAKOTA MOVING EAST SOUTHEAST AT 30 MPH.
LARGE HAIL...STORNG WINDS AND VERY HEAVY RAIN REPORTED WITH THIS
THUNDERSTORM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS 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.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
A TORNADO WITH LITTLE OR NO ADVANCE WARNING...SO BE ON THE LOOKOUT.
IF YOU SPOT A FUNNEL OR A TORNADO YOU SHOULD SEEK SHELTER IN A
REINFORCED BUILDING OR IN AN INTERIOR ROOM AWAY FROM OUTSIDE WALLS.

ANDERSEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 7:00 PM CDTSevere Thunderstorm WarningFGFCavalier60 min
Aug 18, 7:23 PM CDTSevere Thunderstorm WarningFGFNelson67 min
Aug 18, 7:33 PM CDTSevere Thunderstorm WarningFGFBarnes57 min
Aug 18, 9:10 PM CDTSevere Thunderstorm WarningFGFGrand Forks65 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.