Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 143, NWS Duluth, MN
NWS Duluth, MN issued this severe thunderstorm warning at Jul 17, 2011, 7:38 PM CDT for Price County, Sawyer County, Washburn County, Wisconsin. It was in force for 52 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 17, 2011, 7:38 PM CDT (00:38 UTC)
- Expired
- Jul 17, 2011, 8:30 PM CDT
- In force
- 52 min
- Issued by
- NWS Duluth, MN
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Price County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 142 km from the middle of the area, began a volume at 00:40 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 17, 4:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 223 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
- 4443 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 991 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.1
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 17, 7:11 PM CDT, 27 minutes earlier.
Area forecast discussion, Jul 17, 7:11 PM CDT, 27 minutes before
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</html>Hazardous weather outlook, Jul 17, 12:40 PM CDT, 6 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DULUTH MN 1240 PM CDT SUN JUL 17 2011 MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-181030- 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- 1240 PM CDT SUN JUL 17 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA AND NORTHWEST WISCONSIN. .DAY ONE...THIS AFTERNOON AND TONIGHT SEVERE THUNDERSTORMS WILL BE POSSIBLE...ESPECIALLY AFTER 3 PM. THE PRIMARY SEVERE WEATHER THREAT WOULD BE DAMAGING WINDS. THE AREA MOST AT RISK FOR SEVERE WEATHER WILL BE ALONG AND SOUTH OF US HIGHWAY 2...OR SOUTH OF A LINE FROM WALKER MINNESOTA... TO DULUTH... TO IRONWOOD MICHIGAN. IF SOME OF THE STORMS CAN ORGANIZE INTO FAST MOVING LINES OR CLUSTERS...THEY COULD PRODUCE AREAS OF EXTREME WIND DAMAGE. LARGE HAIL WILL BE A SECONDARY THREAT. GIVEN THE AMOUNT OF MOISTURE AVAILABLE IN THE HOT AND HUMID AIR MASS ACROSS THE REGION...THUNDERSTORMS ARE ALSO LIKELY TO PRODUCE VERY HEAVY RAINFALL...AND POTENTIALLY FLASH FLOODING. STORM SPOTTER GROUPS...AND THOSE WITH OUTDOOR PLANS SHOULD CLOSELY MONITOR WEATHER INFORMATION THIS AFTERNOON AND EVENING. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. HEAT INDEX VALUES ARE LIKELY TO EXCEED 100 DEGREES OVER MUCH OF THE AREA THIS AFTERNOON...INCREASING THE RISK OF HEAT RELATED ILLNESS. HEAT ADVISORIES AND WARNINGS ARE IN EFFECT...AND YOU CAN REFERENCE THOSE PRODUCTS FOR MORE INFORMATION. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PERIODIC THUNDERSTORMS WILL BE POSSIBLE MONDAY THROUGH SATURDAY OVER PORTIONS OF THE NORTHLAND. FAR NORTHERN MINNESOTA SHOULD REMAIN DRY MONDAY THROUGH TUESDAY...MAINLY NORTH OF HIGHWAY 2. SOME OF THE STORMS MAY BE SEVERE MONDAY OVER NORTHWEST WISCONSIN AND WEDNESDAY AND WEDNESDAY NIGHT OVER FAR NORTHERN MINNESOTA. HOT AND HUMID CONDITIONS WILL CONTINUE INTO NEXT WEEK...POSSIBLY THROUGH LATE NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON INTO THIS EVENING. LSZ121-140>148-181030- 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- 1240 PM CDT SUN JUL 17 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR. .DAY ONE...TODAY AND TONIGHT THE RISK OF THUNDERSTORMS WILL INCREASE OVER THE NEARSHORE WATERS OF WESTERN LAKE SUPERIOR AFTER 3 PM THIS AFTERNOON...PARTICULARLY IN THE NEARSHORE WATERS ADJACENT WISCONSIN...AND FROM DULUTH TO TWO HARBORS. THE MAIN THREAT FROM THUNDERSTORMS WOULD BE GUSTY WINDS IN EXCESS OF 34 KNOTS. THERE MAY BE SOME AREAS OF DENSE FOG OVER THE LAKE WITH VISIBILITIES UNDER ONE MILE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS WILL BE POSSIBLE MAINLY ALONG THE SOUTH SHORE OF LAKE SUPERIOR MONDAY THROUGH TUESDAY...THEN ALL AREAS THROUGH THE REMAINDER OF THE WEEK. SOME OF THE STORMS MAY BE QUITE STRONG AT TIMES. AL/DJM MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING WEB ADDRESS: HTTP://WWW.WEATHER.GOV/DULUTH (ALL LOWER CASE)
In the hours before
Local storm report, Jul 17, 6:48 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
648 PM CDT SUN JUL 17 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0645 PM TSTM WND GST GLIDDEN 46.13N 90.58W
07/17/2011 M44 MPH ASHLAND WI MESONET
MEASURED AT CHEQUAMEGON MIDDLE SCHOOL.
&&
LAMERSLocal storm report, Jul 17, 6:50 PM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
650 PM CDT SUN JUL 17 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0605 PM TSTM WND DMG DRUMMOND 46.33N 91.26W
07/17/2011 BAYFIELD WI LAW ENFORCEMENT
TREES BLOWN DOWN AROUND DRUMMOND.
&&
LAMERSLocal storm report, Jul 17, 7:03 PM CDT, 35 minutes before
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</html>Local storm report, Jul 17, 7:05 PM CDT, 33 minutes before
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</html>Local storm report, Jul 17, 7:21 PM CDT, 17 minutes before
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</html>Local storm report, Jul 17, 7:22 PM CDT, 16 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 18, 3:23 AM CDT | Dense Fog Advisory | DLH | Aitkin, Cass, Crow Wing, Itasca, Pine | 6 hr |
| Jul 18, 4:12 AM CDT | Special Weather Statement | DLH | Cook | 93 min |
| Jul 18, 5:57 AM CDT | Special Marine Warning | DLH | 33 min | |
| Jul 18, 6:04 AM CDT | Special Weather Statement | DLH | Lake | 56 min |
| Jul 18, 6:12 AM CDT | Special Marine Warning | DLH | 93 min | |
| Jul 18, 6:18 AM CDT | Severe Thunderstorm Warning | DLH | Lake | 44 min |
| Jul 17, 7:00 PM CDT | Severe Thunderstorm Warning | DLH | Iron | 30 min |
| Jul 17, 7:01 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Sawyer, Washburn | 44 min |
| Jul 17, 7:06 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Iron, Price | 24 min |
| Jul 18, 1:41 PM CDT | Special Weather Statement | DLH | Iron | 34 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 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.