Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 114, NWS Twin Cities, MN

June 10, 2002Hennepin County, Wright County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 10, 2002, 10:23 PM CDT for Hennepin County, Wright County, Minnesota. It was in force for 37 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 10, 2002, 10:23 PM CDT (03:23 UTC)
Expired: Jun 10, 2002, 11:00 PM CDT
In force: 37 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

Counties Hennepin County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 34 km from the middle of the area, began a volume at 03:29 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.

What was reported inside it

Time	Report	Where	Remark
Jun 10, 10:25 PM CDT	Hail 0.75	Montrose, MN
Jun 10, 10:57 PM CDT	Hail 1.75	Watertown, MN
Jun 10, 11:00 PM CDT	Thunderstorm Wind 52 E	Watertown, MN	Large tree limb down in street.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.4 hours before the alert went out and 32 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: 2859 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.5

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 110323
SVRMSP
MNC053-171-110400-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1020 PM CDT MON JUN 10 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN WRIGHT COUNTY IN CENTRAL MINNESOTA
  WESTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 1100 PM CDT

* AT 1020 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM OVER WAVERLY...
  OR ABOUT 4 MILES EAST OF HOWARD LAKE...MOVING EAST AT 30 MPH.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  MONTROSE.
  DELANO.
  ROCKFORD.
  CORCORAN.
  MEDINA.
  INDEPENDENCE.

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

LAT...LON 4522 9400 4499 9407 4491 9344 4520 9342

BINAU

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 10:40 PM CDT	Severe Thunderstorm Warning	MPX	Carver	50 min
Jun 10, 11:04 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	41 min
Jun 10, 11:48 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	42 min
Jun 11, 12:30 AM CDT	Severe Thunderstorm Warning	MPX	Rice	45 min
Jun 11, 1:18 AM CDT	Flash Flood Warning	MPX	Faribault, Freeborn, Martin	4 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.