Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 103, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Sep 2, 2002, 8:56 AM CDT for Cass County, Minnesota. It was in force for 34 min. 1 report 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 2, 2002, 8:56 AM CDT (13:56 UTC)
- Expired
- Sep 2, 2002, 9:30 AM CDT
- In force
- 34 min
- Issued by
- NWS Duluth, MN
- Area
- Counties, with a storm outline in the text
County Cass County, MN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 2, 9:17 AM CDT | Hail 2.5 | Leader, 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 1.9 hours before the alert went out and 240 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.
- Mixed-layer CAPE
- 2159 J/kg
- Mixed-layer CIN
- -235 J/kg
- Mixed-layer LCL
- 827 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 2, 1:30 AM CDT, 7 hours 26 minutes earlier.
Area forecast discussion, Sep 2, 1:30 AM CDT, 7 hours 26 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DULUTH MN 130 AM CDT MON SEP 2 2002 MAIN FOCUS WILL BE SVR TSTM THREAT THIS MRNG. VIGOROUS CDFNT POWERED BY STG MID/UPR LVL DYNAMICS WL SWEEP RAPIDLY THRU MN THIS MRNG AND THRU WI THIS AFTN. THE FNT IS SHOWING UP ON REGIONAL MOSAIC RADAR AS A LINEAR FEATURE BTWN BIS AND JMS. CONVECTION IS BREAKING OUT IN THE CONVERGENT AREA AND SGFNT PRESSURE FALLS AHD OF THE FTN IN THAT AREA. STG SWLY FLOW AND IMPRESSIVE SHEAR THRU THE MID LVLS SUPPORT THE MDT RISK AREA OF SPC. ONCE THE FNT GOES THRU, ENERGY FM THE 100KT JET DRIVING THE S/WV MIXES DOWN TO PRODUCE SOME GUSTY WINDS THAT RAPIDLY END THE SVR THREAT IN THE NVA AREA. WELL HIT THE FCST RATHER HARD EARLY ON WITH A MENTION OF PSBL SVR IN MOST MN AREAS THIS MRNG AND IN WI FOR THE LATE MRNG/AFTN PD. ETA/MESOETA HAS THE SFC DETAILS EARLY ON AND WELL FOLLOW THAT GDNC SINCE NO BIG CHANGES NEEDED ATTM. .DLH...NONE. CS
In the hours before
Special weather statement, Sep 2, 5:08 AM CDT, 3 hours 48 minutes before
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</html>The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 7:40 PM CDT | Flash Flood Warning | DLH | Pine | 4 hr |
| Sep 2, 9:01 AM CDT | Severe Thunderstorm Warning | DLH | Cass | 29 min |
| Sep 2, 9:23 AM CDT | Severe Thunderstorm Warning | DLH | Crow Wing | 52 min |
| Sep 2, 1:18 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Saint Louis | 57 min |
| Sep 2, 1:35 PM CDT | Special Marine Warning | DLH | 85 min | |
| Sep 2, 2:56 PM CDT | Special Marine Warning | DLH | 94 min | |
| Sep 2, 2:41 PM CDT | Severe Thunderstorm Warning | DLH | Bayfield | 64 min |
| Sep 2, 3:17 PM CDT | Severe Thunderstorm Warning | DLH | Ashland | 58 min |
| Sep 2, 4:57 PM CDT | Tornado Warning | DLH | Price | 33 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.