Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 177, NWS Twin Cities, MN

July 21, 2002Freeborn County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 21, 2002, 5:00 PM CDT for Freeborn County, Minnesota. It was in force for 45 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: Jul 21, 2002, 5:00 PM CDT (22:00 UTC)
Expired: Jul 21, 2002, 5:45 PM CDT
In force: 45 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Freeborn 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
Jul 21, 2:55 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 21, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.0 hours before the alert went out and 138 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: 2410 J/kg
Mixed-layer CIN: -202 J/kg
Mixed-layer LCL: 1319 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 94 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.

224 
WUUS53 KMPX 212200
SVRMSP
MNC047-212245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
500 PM CDT SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 545 PM CDT

* AT 500 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH DAMAGING
  WINDS 2 MILES NORTHWEST OF TWIN LAKES...OR ABOUT 7 MILES SOUTHWEST
  OF ALBERT LEA...MOVING EAST AT 15 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  ALBERT LEA.
  GLENVILLE.
  HAYWARD.
  HOLLANDALE.
  MYRTLE.
  TWIN LAKES.

THIS IS A DANGEROUS STORM...STAY INDOORS AWAY FROM WINDOWS. SEVERE
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE WARNED AREA 
UNTIL 9 PM.

LAT...LON 4367 9352 4350 9343 4351 9307 4380 9305

BINAU

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 11:07 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	38 min
Jul 21, 7:04 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Todd	41 min
Jul 21, 7:32 AM CDT	Severe Thunderstorm Warning	MPX	Morrison	58 min
Jul 21, 7:45 AM CDT	Severe Thunderstorm Warning	MPX	Todd	30 min
Jul 21, 2:53 PM CDT	Flash Flood Warning	MPX	Anoka, Hennepin, Wright	3 hr
Jul 21, 5:32 PM CDT	Severe Thunderstorm Warning	MPX	Martin	43 min
Jul 21, 5:48 PM CDT	Flash Flood Warning	MPX	Freeborn	3 hr
Jul 21, 6:00 PM CDT	Flash Flood Warning	MPX	Faribault, Martin	3 hr
Jul 21, 6:20 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Martin	40 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.