Alert archive / North Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 76, NWS Grand Forks, ND

June 27, 1997Nelson County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 27, 1997, 11:20 PM CDT for Nelson County, North Dakota. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 27, 1997, 11:20 PM CDT (04:20 UTC)
Expired
Jun 27, 1997, 11:50 PM CDT
In force
30 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Nelson County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 78 km from the middle of the area, began a volume at 04:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 4.3 hours before the alert went out and 228 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 1997-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2650 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 1997-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.193958Sfc1 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
2650 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
2377 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
75 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

761 
WUUS1 KFAR 280421 RRA
SVRFAR
NDC063-280445-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1120 PM CDT FRI JUN 27 1997
 
THE NATIONAL WEATHER SERVICE IN EASTERN ND/GRAND FORKS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1150 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST NORTH DAKOTA
 
   ...NELSON COUNTY
 
AT 1120 PM CDT...DOPPLER WEATHER RADAR INDICATED A SEVERE THUNDERSTORM
NEAR LAKOTA...OR 30 EAST OF DEVILS LAKE. MOVEMENT WAS SOUTHEAST AT 25
MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND OVER 57 MPH...HAIL
3/4 INCH IN DIAMETER OR LARGER...TORNADOES...DEADLY
LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO A SMALL INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
 
RA

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.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 27, 8:53 PM CDT, 2 hours 27 minutes earlier.

Area forecast discussion, Jun 27, 8:53 PM CDT, 2 hours 27 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
850 PM CDT FRI JUN 27 1997

HAVE NOT HAD ALOT OF TIME TO LOOK AT ANY RAPID UPDATE MODELS WITH
SEVERE WX. SFC FRONT FROM NW TIP OF MN TO BETWEEN BIS AND JMS SHOWING
VERY SLOW EASTWARD MOVEMENT AND PROGS KEEP BOUNDARY NEARLY STATIONARY
OVERNIGHT. AIRMASS AHEAD OF FRONT VERY UNSTABLE WITH ADAP LI'S TO -10
AND SFC TD'S AOB 70. 00Z INL SOUNDING HAD A B+ AROUND 3000 J/KG. ALSO
INL SOUNDING HAD K INDEX OF 34...PWAT 1.36 ALONG WITH GOOD THICKNESS
DIFLUENCE OVER MN. ALSO RESPECTABLE MOIST CONVERGENC JUST EAST OF
BOUNDARY. WILL KEEP FLASH FLOOD WATCH GOING ALONG WITH CHC OF TSRA. ONLY
Q4UESTIONABLE AREA IS IN DVL WHICH IS BEHIND FRONT. WILL SPLIT OFF AREA
AND DROP CHC OF TSRA. TEMPS SEEM IN THE BALL PARK...WILL TAKE A LAST
LOOK AT UPDATE TIME. WILL PROBABLY HOLD OFF ON UPDATE TILL FIRST WATCH
AREA EXPIRES.
VOELKER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 9:20 PM CDTSevere Thunderstorm WarningFGFNelson25 min
Jun 27, 9:40 PM CDTSevere Thunderstorm WarningFGFNelson35 min
Jun 27, 10:05 PM CDTTornado WarningFGFNelson25 min
Jun 27, 10:26 PM CDTSevere Thunderstorm WarningFGFGrand Forks34 min
Jun 27, 10:52 PM CDTSevere Thunderstorm WarningFGFGrand Forks38 min
Jun 27, 11:00 PM CDTSevere Thunderstorm WarningFGFTraill40 min
Jun 27, 11:33 PM CDTSevere Thunderstorm WarningFGFGrand Forks27 min
Jun 27, 11:50 PM CDTSevere Thunderstorm WarningFGFNelson25 min
Jun 27, 11:54 PM CDTSevere Thunderstorm WarningFGFTraill36 min
Jun 28, 12:08 AM CDTTornado WarningFGFGrand Forks, Steele32 min
Jun 28, 12:42 AM CDTSevere Thunderstorm WarningFGFSteele33 min
Jun 28, 1:13 AM CDTSevere Thunderstorm WarningFGFSteele32 min
Jun 28, 8:18 AM CDTSevere Thunderstorm WarningFGFRansom27 min
Jun 28, 8:47 AM CDTSevere Thunderstorm WarningFGFRansom28 min
Jun 28, 9:52 AM CDTSevere Thunderstorm WarningFGFRansom, Sargent38 min
Jun 28, 10:29 AM CDTSevere Thunderstorm WarningFGFRichland, Sargent31 min
Jun 28, 11:02 AM CDTSevere Thunderstorm WarningFGFRichland28 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.