Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 232, NWS Twin Cities, MN

July 30, 2002Freeborn County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 30, 2002, 6:09 PM CDT for Freeborn County, Minnesota. It was in force for 51 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 30, 2002, 6:09 PM CDT (23:09 UTC)
Expired: Jul 30, 2002, 7:00 PM CDT
In force: 51 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Freeborn County, MN

The radar

The Minneapolis radar (KMPX), 125 km from the middle of the area, began a volume at 23:12 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
Jul 30, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 126 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: 767 J/kg
Mixed-layer CIN: -274 J/kg
Mixed-layer LCL: 2024 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 280 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

684 
WUUS53 KMPX 302309
SVRMSP
MNC047-310000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
608 PM CDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 700 PM CDT

* AT 608 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL AND DAMAGING WINDS 4 MILES NORTHEAST OF HARTLAND...OR ABOUT 14
  MILES NORTH OF ALBERT LEA...MOVING SOUTHEAST AT 35 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  ALBERT LEA.
  CLARKS GROVE.
  MANCHESTER.
  BANCROFT.
  HOLLANDALE.  

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

LAT...LON 4385 9335 4384 9361 4353 9337 4352 9307
          4384 9307

RAH/SEB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 4:13 PM CDT	Severe Thunderstorm Warning	MPX	Rice	47 min
Jul 30, 4:44 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	46 min
Jul 30, 5:00 PM CDT	Severe Thunderstorm Warning	MPX	Rice	30 min
Jul 30, 5:37 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	38 min
Jul 30, 5:45 PM CDT	Severe Thunderstorm Warning	MPX	Steele	45 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; radar from the NEXRAD Level II archive.