Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 207, NWS Sioux Falls, SD

July 28, 2002Murray County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 28, 2002, 3:14 PM CDT for Murray County, Minnesota. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 28, 2002, 3:14 PM CDT (20:14 UTC)
Expired: Jul 28, 2002, 4:00 PM CDT
In force: 46 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Murray County, MN

The radar

The Sioux Falls radar (KFSD), 89 km from the middle of the area, began a volume at 20:17 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 28, 3:58 PM CDT	Hail 1.75	Slayton, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 28, 1:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.2 hours before the alert went out and 197 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: 1056 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1511 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

789 
WUUS53 KFSD 282014
SVRFSD
MNC101-282100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
314 PM CDT SUN JUL 28 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MURRAY COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 400 PM CDT

* AT 314 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 6 MILES NORTHWEST OF CURRENT LAKE
  TO 21 MILES WEST OF CHANDLER...OR FROM 19 MILES NORTHEAST OF
  PIPESTONE TO 8 MILES SOUTHWEST OF PIPESTONE...MOVING EAST AT 35
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CURRENT LAKE AROUND 325 PM CDT
  LAKE WILSON AROUND 335 PM CDT
  CHANDLER AROUND 340 PM CDT
  SLAYTON...CURRIE AROUND 350 PM CDT
  DOVRAY...FULDA AROUND 400 PM CDT

THIS STORM WILL PRODUCE LARGE HAIL AND DAMAGING WIND. GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4419 9605 4384 9606 4386 9548 4420 9548

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 2:44 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln	31 min
Jul 28, 2:52 PM CDT	Tornado Warning	FSD	Lincoln	23 min
Jul 28, 2:54 PM CDT	Severe Thunderstorm Warning	FSD	Pipestone	36 min
Jul 28, 3:16 PM CDT	Tornado Warning	FSD	Lincoln, Lyon, Murray	34 min
Jul 28, 3:22 PM CDT	Severe Thunderstorm Warning	FSD	Pipestone	23 min
Jul 28, 3:45 PM CDT	Severe Thunderstorm Warning	FSD	Rock	45 min
Jul 28, 3:51 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Murray	39 min
Jul 28, 4:08 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood	52 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2002 Every severe thunderstorm warning in 2002

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.