Alert archive / Minnesota / Frost Advisories in 2011
Frost Advisory 7, NWS Duluth, MN
NWS Duluth, MN issued this frost advisory at Sep 13, 2011, 3:12 PM CDT for 9 counties in Minnesota. It took effect at Sep 14, 2011, 2:00 AM CDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Sep 13, 2011, 3:12 PM CDT (20:12 UTC)
- In effect from
- Sep 14, 2011, 2:00 AM CDT
- Expired
- Sep 14, 2011, 8:09 AM CDT
- In force
- 6 hr
- Issued by
- NWS Duluth, MN
Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 72 km from the middle of the area, began a volume at 20:12 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 12:00Z, 8.2 hours before the alert went out and 149 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
- 96 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 799 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost advisory 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 frost advisory went out at Sep 12, 6:48 PM CDT, 20 hours 24 minutes earlier.
Area forecast discussion, Sep 12, 6:48 PM CDT, 20 hours 24 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 13, 4:05 AM CDT | Small Craft Advisory | DLH | 41 hr | |
| Sep 13, 4:11 AM CDT | Freeze Watch | DLH | Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 4 more | 24 hr |
| Sep 13, 2:50 PM CDT | Special Weather Statement | DLH | 40 min | |
| Sep 13, 2:56 PM CDT | Special Weather Statement | DLH | Itasca, Saint Louis | 34 min |
| Sep 13, 3:33 PM CDT | Special Weather Statement | DLH | Koochiching | 42 min |
| Sep 13, 3:52 PM CDT | Special Weather Statement | DLH | Lake, Saint Louis | 38 min |
| Sep 13, 4:29 PM CDT | Special Weather Statement | DLH | Saint Louis | 46 min |
| Sep 13, 5:13 PM CDT | Special Weather Statement | DLH | Saint Louis | 47 min |
| Sep 13, 6:11 PM CDT | Special Weather Statement | DLH | Lake | 34 min |
| Sep 13, 6:15 PM CDT | Special Weather Statement | DLH | Carlton | 45 min |
| Sep 13, 6:18 PM CDT | Special Weather Statement | DLH | Carlton | 42 min |
| Sep 12, 7:14 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Price, Sawyer | 42 min |
Nearby
Frost Advisories in Minnesota, 2011Every frost advisory in 2011
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.