Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 310, NWS Twin Cities, MN

September 1, 2002Morrison County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 1, 2002, 2:59 PM CDT for Morrison County, Minnesota. It was in force for 61 min. 1 report 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: Sep 1, 2002, 2:59 PM CDT (19:59 UTC)
Expired: Sep 1, 2002, 4:00 PM CDT
In force: 61 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Morrison County, MN

What was reported inside it

Time	Report	Where	Remark
Sep 1, 3:00 PM CDT	Hail 1.75	Upsala, 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
Sep 1, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.0 hours before the alert went out and 128 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: 319 J/kg
Mixed-layer CIN: -200 J/kg
Mixed-layer LCL: 1215 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 219 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.

692 
WUUS53 KMPX 011959
SVRMSP
MNC097-012100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
259 PM CDT SUN SEP 1 2002

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 400 PM CDT

* AT 257 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE
  HAIL JUST SOUTH OF UPSALA...OR ABOUT 20 MILES SOUTHWEST OF
  LITTLE FALLS.  IT WAS MOVING NORTHEAST AT 35 MPH. HAIL THE SIZE
  OF DIMES WAS REPORTED 4 MILES SOUTH OF ST FRANCIS AT 248 PM.

* SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...
  ELMDALE.
  BOWLUS.
  ROYALTON.
  LITTLE FALLS.

THIS IS A DANGEROUS STORM WITH LARGE HAIL...STAY INDOORS AWAY FROM
WINDOWS.

LAT...LON 4579 9462 4578 9447 4582 9439 4596 9380
          4614 9411

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 10:36 AM CDT	Severe Thunderstorm Warning	MPX	Kanabec	39 min
Sep 1, 11:51 AM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	39 min
Sep 1, 12:29 PM CDT	Severe Thunderstorm Warning	MPX	Pope	46 min
Sep 1, 1:10 PM CDT	Severe Thunderstorm Warning	MPX	Todd	40 min
Sep 1, 1:32 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs	28 min
Sep 1, 2:07 PM CDT	Severe Thunderstorm Warning	MPX	Morrison, Todd	53 min
Sep 1, 2:39 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	51 min
Sep 1, 2:46 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	44 min
Sep 1, 3:28 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Stearns	62 min
Sep 1, 3:58 PM CDT	Severe Thunderstorm Warning	MPX	Morrison	62 min
Sep 1, 4:26 PM CDT	Severe Thunderstorm Warning	MPX	McLeod, Sibley	49 min
Sep 1, 4:31 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs	44 min
Sep 1, 5:14 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	61 min
Sep 1, 5:39 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Sherburne	51 min
Sep 1, 6:55 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	50 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.