Alert archive / Minnesota / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 49, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Aug 14, 2009, 11:23 PM CDT for Saint Louis County, Minnesota. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 14, 2009, 11:23 PM CDT (04:23 UTC)
- Expired
- Aug 15, 2009, 12:30 AM CDT
- In force
- 67 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
County Saint Louis County, MN
The radar
The Duluth radar (KDLH), 86 km from the middle of the area, began a volume at 04:23 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.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 4.4 hours before the alert went out and 126 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
- 1758 J/kg
- Mixed-layer CIN
- -158 J/kg
- Mixed-layer LCL
- 1404 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 10.1
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 7:15 PM CDT | Special Weather Statement | DLH | Koochiching | 45 min |
| Aug 14, 8:02 PM CDT | Special Weather Statement | DLH | 43 min | |
| Aug 14, 8:39 PM CDT | Special Weather Statement | DLH | Koochiching | 51 min |
| Aug 14, 9:00 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 43 min |
| Aug 14, 9:45 PM CDT | Special Weather Statement | DLH | Koochiching | 45 min |
| Aug 14, 10:17 PM CDT | Severe Thunderstorm Warning | DLH | Koochiching | 39 min |
| Aug 14, 11:04 PM CDT | Special Weather Statement | DLH | Koochiching | 86 min |
| Aug 14, 11:45 PM CDT | Special Weather Statement | DLH | Cass | 45 min |
| Aug 15, 1:49 AM CDT | Special Weather Statement | DLH | Carlton | 56 min |
| Aug 15, 2:05 AM CDT | Special Weather Statement | DLH | Lake, Saint Louis | 85 min |
| Aug 15, 2:21 AM CDT | Special Weather Statement | DLH | Saint Louis | 39 min |
| Aug 15, 2:24 AM CDT | Special Weather Statement | DLH | Carlton | 36 min |
| Aug 15, 2:26 AM CDT | Special Weather Statement | DLH | Carlton | 34 min |
| Aug 15, 2:54 AM CDT | Special Weather Statement | DLH | Lake | 51 min |
| Aug 15, 2:57 AM CDT | Special Weather Statement | DLH | Carlton | 48 min |
| Aug 15, 3:17 AM CDT | Severe Thunderstorm Warning | DLH | Lake | 23 min |
| Aug 15, 3:39 AM CDT | Special Weather Statement | DLH | Cook | 36 min |
| Aug 15, 3:48 AM CDT | Special Weather Statement | DLH | Saint Louis | 42 min |
| Aug 15, 4:10 AM CDT | Special Weather Statement | DLH | Lake | 50 min |
| Aug 15, 5:09 AM CDT | Special Weather Statement | DLH | Koochiching | 66 min |
| Aug 15, 6:38 AM CDT | Special Weather Statement | DLH | Koochiching | 52 min |
| Aug 15, 3:48 PM CDT | Special Weather Statement | DLH | Koochiching | 42 min |
| Aug 15, 4:56 PM CDT | Special Weather Statement | DLH | Koochiching | 49 min |
| Aug 15, 5:49 PM CDT | Special Weather Statement | DLH | 26 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.