Alert archive / Wisconsin / Tornado Warnings in 2002

Tornado Warning 1, NWS Twin Cities, MN

April 18, 2002Dunn County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Apr 18, 2002, 5:24 AM CDT for Dunn County, Wisconsin. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 18, 2002, 5:24 AM CDT (10:24 UTC)
Expired: Apr 18, 2002, 5:45 AM CDT
In force: 21 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Dunn County, WI

The radar

The Minneapolis radar (KMPX), 131 km from the middle of the area, began a volume at 10:25 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 18, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 10.4 hours before the alert went out and 134 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2104 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 146 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 
WFUS53 KMPX 181024
TORMSP
WIC033-181045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
524 AM CDT THU APR 18 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 545 AM CDT

* AT 524 AM CDT...RADAR INDICATED A DEVELOPING TORNADO 2 MILES WEST
  OF MENOMONIE...MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE PATH OF THIS TORNADO INCLUDE...
  ELK MOUND.
  MENOMONIE.

GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR

LAT...LON 4497 9205 4480 9204 4479 9168 4497 9168

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 3:52 AM CDT	Severe Thunderstorm Warning	MPX	Pierce, Saint Croix	53 min
Apr 18, 4:49 AM CDT	Severe Thunderstorm Warning	MPX	Barron, Dunn	41 min
Apr 18, 5:36 AM CDT	Severe Thunderstorm Warning	MPX	Barron	24 min
Apr 18, 5:42 AM CDT	Severe Thunderstorm Warning	MPX	Chippewa	33 min
Apr 18, 4:12 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa	63 min
Apr 18, 4:20 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire, Pepin	40 min
Apr 18, 4:28 PM CDT	Severe Thunderstorm Warning	MPX	Dunn	32 min
Apr 18, 4:57 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	63 min
Apr 18, 5:34 PM CDT	Severe Thunderstorm Warning	MPX	Rusk	26 min
Apr 18, 5:57 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	63 min
Apr 18, 6:59 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa	31 min

Nearby

Tornado Warnings in Wisconsin, 2002 Every tornado warning in 2002 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.