Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 147, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 19, 2011, 8:27 AM CDT for Aitkin County, Crow Wing County, Minnesota. It was in force for 63 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
- Jul 19, 2011, 8:27 AM CDT (13:27 UTC)
- Expired
- Jul 19, 2011, 9:30 AM CDT
- In force
- 63 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Aitkin County, MN, Crow Wing County, MN
The radar
The Duluth radar (KDLH), 121 km from the middle of the area, began a volume at 13:27 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
Minneapolis, MN (KMPX), launched 12:00Z, 1.5 hours before the alert went out and 189 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
- 5144 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 830 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.2
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 Jul 19, 6:22 AM CDT, 2 hours 5 minutes earlier.
Area forecast discussion, Jul 19, 6:22 AM CDT, 2 hours 5 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 439 AM CDT TUE JUL 19 2011 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-201030- KOOCHICHING-NORTHERN ST. LOUIS-NORTHERN COOK/NORTHERN LAKE- NORTHERN ITASCA-CENTRAL ST. LOUIS-SOUTHERN LAKE/LAKESHORE- SOUTHERN COOK/LAKESHORE-NORTHERN CASS-SOUTHERN ITASCA- SOUTHERN CASS-CROW WING-NORTHERN AITKIN-SOUTHERN AITKIN- CARLTON/SOUTHERN ST. LOUIS-PINE-DOUGLAS-BAYFIELD-ASHLAND-IRON- BURNETT-WASHBURN-SAWYER-PRICE- 439 AM CDT TUE JUL 19 2011 ...THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY AND TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS ARE POSSIBLE TODAY AND TONIGHT...SOME OF WHICH MAY BE SEVERE...MAINLY THIS AFTERNOON AND TONIGHT. AN ISOLATED SEVERE STORM MAY AFFECT AREAS ALONG AND SOUTHWEST OF A LINE FROM LAKE WINNIBIGOSHISH TO PINE CITY YET THIS MORNING. THE MAIN THREATS WILL BE DAMAGING WINDS...LARGE HAIL AND HEAVY RAIN. A TORNADO IS ALSO POSSIBLE THIS AFTERNOON AND EVENING...MAINLY OVER SOUTHERN PORTIONS OF THE NORTHLAND. HEAT ADVISORIES AND WARNINGS CONTINUE TO BE IN EFFECT FOR MUCH OF THE NORTHLAND...EXCEPT THE ARROWHEAD. HEAT INDICES WILL BE HIGHEST OVER SOUTHERN AREAS TODAY. SEE THE LATEST WEATHER MESSAGE AND FORECAST FOR ADDITIONAL DETAILS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THERE IS A CHANCE FOR THUNDERSTORMS WEDNESDAY AND WEDNESDAY NIGHT...SOME OF WHICH MAY BE SEVERE OVER FAR NORTHERN MINNESOTA WEDNESDAY AND OVER ALL AREAS WEDNESDAY NIGHT. A CHANCE FOR THUNDERSTORMS WILL RETURN TO THE NORTHLAND THURSDAY NIGHT THROUGH SUNDAY. HEAT ADVISORIES AND WARNINGS WILL CONTINUE WEDNESDAY ACROSS MUCH OF THE NORTHLAND. HEAT INDICES WILL BE HIGHEST OVER SOUTHERN AREAS TODAY. SEE THE LATEST WEATHER MESSAGE AND FORECAST FOR ADDITIONAL DETAILS. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT. MOST LIKELY TIME WILL BE LATER THIS AFTERNOON INTO TONIGHT. LSZ121-140>148-201030- BAYFIELD TO OAK POINT WI-GRAND PORTAGE TO GRAND MARAIS MN- GRAND MARAIS TO TACONITE HARBOR MN- TACONITE HARBOR TO SILVER BAY HARBOR MN- SILVER BAY HARBOR TO TWO HARBORS MN-TWO HARBORS TO DULUTH MN- DULUTH MN TO PORT WING WI-PORT WING TO SAND ISLAND WI- SAND ISLAND TO BAYFIELD WI-OAK POINT TO SAXON HARBOR WI- 357 AM CDT TUE JUL 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS WILL BE POSSIBLE TODAY AND TONIGHT...SOME OF WHICH MAY BE SEVERE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THUNDERSTORMS WILL BE POSSIBLE PERIODICALLY THROUGH MUCH OF THE PERIOD...WITH A BREAK THURSDAY. MELDE MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS: HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)
In the hours before
Special weather statement, Jul 19, 6:05 AM CDT, 2 hours 22 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 |
|---|---|---|---|---|
| Jul 19, 6:05 AM CDT | Special Weather Statement | DLH | Wadena | 115 min |
| Jul 19, 7:00 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 60 min |
| Jul 19, 7:05 AM CDT | Areal Flood Advisory | DLH | Cass, Crow Wing | 3 hr |
| Jul 19, 7:30 AM CDT | Special Weather Statement | DLH | Aitkin, Crow Wing | 15 min |
| Jul 19, 7:48 AM CDT | Severe Thunderstorm Warning | DLH | Cass, Crow Wing | 42 min |
| Jul 19, 9:40 AM CDT | Special Weather Statement | DLH | Pine | 35 min |
| Jul 19, 10:23 AM CDT | Special Weather Statement | DLH | Cass | 37 min |
| Jul 19, 10:37 AM CDT | Special Weather Statement | DLH | Itasca | 23 min |
| Jul 19, 11:09 AM CDT | Special Weather Statement | DLH | Itasca | 51 min |
| Jul 19, 12:13 PM CDT | Special Weather Statement | DLH | Itasca | 32 min |
| Jul 19, 12:41 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Cass, Itasca, Saint Louis | 49 min |
| Jul 19, 1:33 PM CDT | Severe Thunderstorm Warning | DLH | Cass, Itasca | 42 min |
| Jul 19, 1:42 PM CDT | Special Weather Statement | DLH | Carlton | 33 min |
| Jul 19, 1:47 PM CDT | Severe Thunderstorm Warning | DLH | Aitkin, Carlton, Saint Louis | 58 min |
| Jul 19, 2:14 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine, Saint Louis | 46 min |
| Jul 19, 3:03 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 27 min |
| Jul 19, 3:17 PM CDT | Special Weather Statement | DLH | Itasca | 58 min |
| Jul 19, 3:23 PM CDT | Special Weather Statement | DLH | Aitkin, Carlton | 52 min |
| Jul 19, 4:14 PM CDT | Special Weather Statement | DLH | Pine | 46 min |
| Jul 19, 4:30 PM CDT | Areal Flood Advisory | DLH | Itasca | 6 hr |
| Jul 19, 4:41 PM CDT | Severe Thunderstorm Warning | DLH | Carlton, Pine | 49 min |
| Jul 19, 6:31 PM CDT | Special Weather Statement | DLH | Pine | 14 min |
| Jul 19, 6:43 PM CDT | Severe Thunderstorm Warning | DLH | Pine | 32 min |
| Jul 19, 6:52 PM CDT | Tornado Warning | DLH | Pine | 27 min |
| Jul 19, 5:04 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Douglas, Sawyer, Washburn | 41 min |
| Jul 19, 5:44 PM CDT | Severe Thunderstorm Warning | DLH | Sawyer, Washburn | 46 min |
| Jul 19, 6:42 PM CDT | Severe Thunderstorm Warning | DLH | Burnett, Washburn | 33 min |
| Jul 19, 6:56 PM CDT | Severe Thunderstorm Warning | DLH | Price | 19 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning 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.