Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 101, NWS Grand Forks, ND

July 21, 1996Polk County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 21, 1996, 3:07 AM CDT for Polk County, Minnesota. It was in force for 38 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
Jul 21, 1996, 3:07 AM CDT (08:07 UTC)
Expired
Jul 21, 1996, 3:45 AM CDT
In force
38 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Polk County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 74 km from the middle of the area, began a volume at 08:07 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

International Fa, MN (KINL), launched 00:00Z, 8.1 hours before the alert went out and 246 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, International Fa, MN at 00:00Z on 1996-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, International Fa, MN at 00:00Z on 1996-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1244 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
102 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 210808
SVRFAR
MNC119-210845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA ND
307 AM CDT SUN JUL 21 1996
 
THE NATIONAL WEATHER SERVICE IN EASTERN NORTH DAKOTA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  345 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST MINNESOTA
 
   ...SOUTHERN POLK COUNTY
 
AT 309 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES
SOUTHEAST OF GRAND FORKS NORTH DAKOTA...BETWEEN CLIMAX AND CROOKSTON IN
MINNESOTA. THIS STORM WAS MOVING TO THE EAST AT 25 MPH AND WILL AFFECT
THE COMMUNITIES OF GREENVIEW AND MELVIN...45 MILES SOUTHEAST OF GRAND
FORKS.
 
IF YOU ARE IN THE PPATH OF THIS STORM...BE PREPARED FOR
WINDS IN EXCESS OF 57 MPH...LARGE HAIL AND DEADLY
LIGHTNING.  MOVE INSIDE A STRONG BUILDING AND STAY AWAY
FROM WINDOWS.
 
 
 
GODON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 4:22 AM CDTSevere Thunderstorm WarningFGFNorman23 min
Jul 21, 1:16 PM CDTSevere Thunderstorm WarningFGFKittson29 min
Jul 21, 1:51 PM CDTSevere Thunderstorm WarningFGFKittson, Roseau54 min
Jul 21, 2:37 PM CDTTornado WarningFGFMarshall38 min
Jul 21, 2:54 PM CDTSevere Thunderstorm WarningFGFPolk51 min
Jul 21, 3:06 PM CDTSevere Thunderstorm WarningFGFBecker39 min
Jul 21, 3:21 PM CDTSevere Thunderstorm WarningFGFRoseau39 min
Jul 21, 3:45 PM CDTSevere Thunderstorm WarningFGFMahnomen30 min
Jul 21, 4:04 PM CDTSevere Thunderstorm WarningFGFRoseau26 min
Jul 21, 4:11 PM CDTSevere Thunderstorm WarningFGFPolk34 min
Jul 21, 4:13 PM CDTSevere Thunderstorm WarningFGFClearwater32 min
Jul 21, 4:39 PM CDTSevere Thunderstorm WarningFGFBeltrami36 min
Jul 21, 4:49 PM CDTSevere Thunderstorm WarningFGFPolk26 min
Jul 21, 5:14 PM CDTSevere Thunderstorm WarningFGFPolk31 min
Jul 21, 5:19 PM CDTSevere Thunderstorm WarningFGFBeltrami41 min
Jul 21, 5:36 PM CDTSevere Thunderstorm WarningFGFClearwater39 min
Jul 21, 5:47 PM CDTSevere Thunderstorm WarningFGFOtter Tail43 min
Jul 21, 5:50 PM CDTSevere Thunderstorm WarningFGFBecker25 min
Jul 21, 6:26 PM CDTSevere Thunderstorm WarningFGFBeltrami34 min
Jul 21, 6:31 PM CDTSevere Thunderstorm WarningFGFOtter Tail29 min
Jul 21, 6:56 PM CDTSevere Thunderstorm WarningFGFWadena34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996Every severe thunderstorm warning in 1996

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.