Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 2, NWS Twin Cities, MN

April 16, 2002Chippewa County, Lac qui Parle County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 16, 2002, 7:16 PM CDT for Chippewa County, Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 44 min. 3 reports 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: Apr 16, 2002, 7:16 PM CDT (00:16 UTC)
Expired: Apr 16, 2002, 8:00 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Chippewa County, MN, Lac qui Parle County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 161 km from the middle of the area, began a volume at 00:18 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
Apr 16, 7:20 PM CDT	Hail 1	Dawson, MN
Apr 16, 7:55 PM CDT	Hail 0.75	Granite Falls, MN
Apr 16, 8:00 PM CDT	Hail 0.88	Wegdahl, MN	Ground white.

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
Apr 16, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.3 hours before the alert went out and 185 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: 1904 J/kg
Mixed-layer CIN: -135 J/kg
Mixed-layer LCL: 1836 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 170016
SVRMSP
MNC023-073-173-170100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
715 PM CDT TUE APR 16 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAC QUI PARLE COUNTY IN WEST CENTRAL MINNESOTA
  CHIPPEWA COUNTY IN WEST CENTRAL MINNESOTA
  YELLOW MEDICINE COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 800 PM CDT

* AT 715 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL 7 MILES SOUTH OF DAWSON...OR ABOUT 13 MILES SOUTH OF
  MADISON...MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  MADISON.
  MONTEVIDEO.
  CLARKFIELD
  HANLEY FALLS

THIS IS A DANGEROUS STORM WITH LARGE HAIL...STAY INDOORS AWAY FROM
WINDOWS.

LAT...LON 4503 9636 4467 9623 4471 9570 4500 9531
          4512 9572

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 16, 7:52 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Swift	53 min
Apr 16, 8:12 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Martin, Redwood, Watonwan	48 min
Apr 16, 8:15 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Renville	60 min
Apr 16, 8:34 PM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	56 min
Apr 16, 9:36 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Stearns, Wright	39 min
Apr 16, 9:44 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	31 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.