Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 68, NWS Twin Cities, MN

May 5, 2002Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 5, 2002, 7:07 PM CDT for Sibley County, Minnesota. It was in force for 53 min. 2 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: May 5, 2002, 7:07 PM CDT (00:07 UTC)
Expired: May 5, 2002, 8:00 PM CDT
In force: 53 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), 69 km from the middle of the area, began a volume at 00:09 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
May 5, 7:45 PM CDT	Hail 1	Winthrop, MN
May 5, 8:05 PM CDT	Hail 0.88	Arlington, MN

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 watch it was issued in

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

Issued	Product	Office	Lasted
May 5, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.1 hours before the alert went out and 321 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: 1985 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 159 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.

000 
WUUS53 KMPX 060007
SVRMSP
MNC143-061005-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
706 PM CDT SUN MAY 5 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 800 PM CDT

* AT 706 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 18 MILES 
WEST OF GIBBON...OR ABOUT 14 MILES SOUTHEAST OF OLIVIA...MOVING 
EAST AT 30 MPH.         

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  ARLINGTON.
  GAYLORD.
  GIBBON.
  WINTHROP.

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

LAT...LON 4464 9461 4450 9458 4449 9402 4466 9397
          4462 9434

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 7:16 PM CDT	Severe Thunderstorm Warning	MPX	Ramsey, Washington	29 min
May 5, 7:54 PM CDT	Severe Thunderstorm Warning	MPX	McLeod	51 min
May 5, 8:02 PM CDT	Severe Thunderstorm Warning	MPX	Scott, Sibley	58 min
May 5, 9:51 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	39 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.