Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 316, NWS Twin Cities, MN

September 1, 2002Benton County, Sherburne County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 1, 2002, 5:39 PM CDT for Benton County, Sherburne County, Minnesota. It was in force for 51 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Sep 1, 2002, 5:39 PM CDT (22:39 UTC)
Expired
Sep 1, 2002, 6:30 PM CDT
In force
51 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Benton County, MN, Sherburne County, MN

What was reported inside it

TimeReportWhereRemark
Sep 1, 5:54 PM CDTHail 1Foley, MN
Sep 1, 6:15 PM CDTHail 0.75Zimmerman, 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.

IssuedProductOfficeLasted
Sep 1, 12:45 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.7 hours before the alert went out and 83 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2002-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 319 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2002-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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 office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 10:36 AM CDTSevere Thunderstorm WarningMPXKanabec39 min
Sep 1, 11:51 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Morrison39 min
Sep 1, 12:29 PM CDTSevere Thunderstorm WarningMPXPope46 min
Sep 1, 1:10 PM CDTSevere Thunderstorm WarningMPXTodd40 min
Sep 1, 1:32 PM CDTSevere Thunderstorm WarningMPXMille Lacs28 min
Sep 1, 2:07 PM CDTSevere Thunderstorm WarningMPXMorrison, Todd53 min
Sep 1, 2:39 PM CDTSevere Thunderstorm WarningMPXKanabec51 min
Sep 1, 2:46 PM CDTSevere Thunderstorm WarningMPXStearns44 min
Sep 1, 2:59 PM CDTSevere Thunderstorm WarningMPXMorrison61 min
Sep 1, 3:28 PM CDTSevere Thunderstorm WarningMPXBenton, Stearns62 min
Sep 1, 3:58 PM CDTSevere Thunderstorm WarningMPXMorrison62 min
Sep 1, 4:26 PM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley49 min
Sep 1, 4:31 PM CDTSevere Thunderstorm WarningMPXBenton, Mille Lacs44 min
Sep 1, 5:14 PM CDTSevere Thunderstorm WarningMPXCarver, Scott, Sibley61 min
Sep 1, 6:55 PM CDTSevere Thunderstorm WarningMPXDakota50 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2002Every 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.