Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 255, NWS Twin Cities, MN

August 3, 2002Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 3, 2002, 6:49 PM CDT for Sibley County, Minnesota. It was in force for 41 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 3, 2002, 6:49 PM CDT (23:49 UTC)
Expired: Aug 3, 2002, 7:30 PM CDT
In force: 41 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Sibley County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 23:43 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
Aug 3, 3:00 PM CDT	Tornado Watch	SPC	6 hr
Aug 3, 6:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.8 hours before the alert went out and 46 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: 1222 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 212 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.

704 
WUUS53 KMPX 032349
SVRMSP
MNC143-040030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
649 PM CDT SAT AUG 3 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SIBLEY COUNTY IN CENTRAL MINNESOTA

* UNTIL 730 PM CDT

* AT 649 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 4 MILES EAST OF ARLINGTON...OR ABOUT 21    
  MILES NORTH OF ST PETER...MOVING EAST AT 30 MPH.  THIS WARNING     
  REPLACES THE TORNADO WARNING WHICH WAS SET TO EXPIRE AT 7 PM.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  ARLINGTON.
  GREEN ISLE.
  NEW ROME.
  HENDERSON.
  GAYLORD.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 4469 9419 4450 9419 4451 9394 4470 9389

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:25 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	50 min
Aug 3, 3:54 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Washington	51 min
Aug 3, 4:36 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	39 min
Aug 3, 5:01 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	44 min
Aug 3, 5:09 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle	51 min
Aug 3, 5:13 PM CDT	Severe Thunderstorm Warning	MPX	Sherburne, Wright	47 min
Aug 3, 5:15 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	60 min
Aug 3, 5:23 PM CDT	Tornado Warning	MPX	Chisago	37 min
Aug 3, 5:32 PM CDT	Severe Thunderstorm Warning	MPX	Swift	58 min
Aug 3, 5:40 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	50 min
Aug 3, 5:49 PM CDT	Severe Thunderstorm Warning	MPX	Carver	51 min
Aug 3, 6:09 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	36 min
Aug 3, 6:15 PM CDT	Tornado Warning	MPX	Carver, Scott, Sibley	45 min
Aug 3, 6:27 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	48 min
Aug 3, 6:32 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Ramsey, Washington	43 min
Aug 3, 6:32 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	58 min
Aug 3, 6:36 PM CDT	Flash Flood Warning	MPX	Yellow Medicine	3 hr

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; radar from the NEXRAD Level II archive.