Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 270, NWS Twin Cities, MN

August 11, 2002Pope County, Stevens County, Swift County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 11, 2002, 11:16 PM CDT for Pope County, Stevens County, Swift County, Minnesota. It was in force for 59 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: Aug 11, 2002, 11:16 PM CDT (04:16 UTC)
Expired: Aug 12, 2002, 12:15 AM CDT
In force: 59 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Pope County, MN, Stevens County, MN, Swift County, MN

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 11, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 11, 9:55 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.3 hours before the alert went out and 184 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: 1443 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1692 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

529 
WUUS53 KMPX 120416
SVRMSP
MNC121-149-151-120515-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1115 PM CDT SUN AUG 11 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POPE COUNTY IN WEST CENTRAL MINNESOTA
  STEVENS COUNTY IN WEST CENTRAL MINNESOTA
  SWIFT COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 1215 AM CDT

* AT 1114 PM CDT...RADAR INDICATED SEVERAL SEVERE STORMS...EXTENDING
  FROM JUST NORTH OF MORRIS...TO A FEW MILES SOUTHWEST OF BENSON.
  THE STORMS WERE MOVING EAST-NORTHEAST AT 30 MPH. DAMAGING WIND AND
  LARGE HAIL CAN BE EXPECTED.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  BENSON.
  GLENWOOD.
  MORRIS.
  HANCOCK.
  CLONTARF.
  RURAL AREAS SOUTH OF STARBUCK.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER
IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 4562 9613 4520 9596 4523 9529 4575 9534

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 9:59 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	61 min
Aug 11, 11:53 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Yellow Medicine	37 min
Aug 12, 12:07 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	38 min
Aug 12, 12:23 AM CDT	Severe Thunderstorm Warning	MPX	Martin, Watonwan	52 min
Aug 12, 12:55 AM CDT	Severe Thunderstorm Warning	MPX	Faribault	50 min
Aug 12, 2:14 AM CDT	Severe Thunderstorm Warning	MPX	Ramsey	31 min
Aug 12, 2:27 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Washington	48 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; the sounding from the Mesonet's radiosonde archive.