Alert archive / Minnesota / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 96, NWS Grand Forks, ND

July 17, 1996Norman County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 17, 1996, 10:00 PM CDT for Norman County, Minnesota. It was in force for 15 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 17, 1996, 10:00 PM CDT (03:00 UTC)
Expired: Jul 17, 1996, 10:15 PM CDT
In force: 15 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Norman County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 69 km from the middle of the area, began a volume at 02:59 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.

What was reported inside it

Time	Report	Where	Remark
Jul 17, 10:14 PM CDT	Hail 0.75	Lockhart, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 3.0 hours before the alert went out and 273 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: 784 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1261 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: -30 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 180302
SVRFAR
MNC107-180315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA ND
1000 PM CDT WED JUL 17 1996
 
THE NATIONAL WEATHER SERVICE IN EASTERN NORTH DAKOTA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN WEST CENTRAL MINNESOTA
 
   ...WESTERN NORMAN COUNTY
 
AT 10 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTH
OF HENDRUM...OR 25 MILES NORTH OF FARGO. THE STORM WAS MOVING SLOWLY
EAST AT 10 MPH.
 
THIS THUNDERSTORM WILL MOVE IN OPEN COUNTY BETWEEN THE TOWNS OF HENDRUM
AND ADA THROUGH 1015 PM.
 
REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 9:40 PM CDT	Severe Thunderstorm Warning	FGF	Norman	20 min
Jul 17, 10:14 PM CDT	Severe Thunderstorm Warning	FGF	Norman	31 min
Jul 17, 10:45 PM CDT	Severe Thunderstorm Warning	FGF	Norman	30 min
Jul 17, 11:15 PM CDT	Severe Thunderstorm Warning	FGF	Norman, Polk	30 min
Jul 18, 12:15 AM CDT	Severe Thunderstorm Warning	FGF	Polk	30 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1996 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.