Alert archive / Wisconsin / Flash Flood Watches in 2011
Flash Flood Watch 4, NWS Duluth, MN
NWS Duluth, MN issued this flash flood watch at Jul 17, 2011, 1:06 PM CDT for 7 counties in Minnesota; 8 counties in Wisconsin. It took effect at Jul 17, 2011, 3:00 PM CDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2011, 1:06 PM CDT (18:06 UTC)
- In effect from
- Jul 17, 2011, 3:00 PM CDT
- Expired
- Jul 18, 2011, 3:07 AM CDT
- In force
- 12 hr
- Issued by
- NWS Duluth, MN
- Flood severity
- None
Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Crow Wing County, MN, Itasca County, MN, Pine County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Iron County, WI, Price County, WI, Sawyer County, WI, Washburn County, WI
The radar
The Duluth radar (KDLH), 40 km from the middle of the area, began a volume at 18:08 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, 6.1 hours before the alert went out and 211 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
- 5378 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.8
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Jul 17, 1:03 PM CDT, 3 minutes earlier.
Area forecast discussion, Jul 17, 1:03 PM CDT, 3 minutes before
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</html>Hazardous weather outlook, Jul 17, 12:40 PM CDT, 26 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)
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 12:53 AM CDT | Special Weather Statement | DLH | Itasca, Koochiching | 112 min |
| Jul 17, 1:50 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 40 min |
| Jul 17, 2:23 AM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 52 min |
| Jul 17, 3:10 AM CDT | Severe Thunderstorm Warning | DLH | Itasca | 26 min |
| Jul 17, 3:54 AM CDT | Special Weather Statement | DLH | Koochiching | 36 min |
| Jul 17, 4:40 AM CDT | Special Weather Statement | DLH | Koochiching | 35 min |
| Jul 17, 1:15 PM CDT | Marine Dense Fog Advisory | DLH | 23 hr | |
| Jul 17, 3:45 PM CDT | Special Weather Statement | DLH | Itasca | 45 min |
| Jul 17, 3:55 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Koochiching | 50 min |
| Jul 17, 4:03 PM CDT | Special Weather Statement | DLH | Saint Louis | 27 min |
| Jul 17, 4:15 PM CDT | Special Weather Statement | DLH | 15 min | |
| Jul 17, 4:31 PM CDT | Special Weather Statement | DLH | Itasca | 29 min |
| Jul 17, 4:38 PM CDT | Special Weather Statement | DLH | Koochiching | 32 min |
| Jul 17, 4:52 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 38 min |
| Jul 17, 4:58 PM CDT | Special Weather Statement | DLH | Saint Louis | 32 min |
| Jul 17, 5:01 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 44 min |
| Jul 17, 5:04 PM CDT | Special Marine Warning | DLH | 38 min | |
| Jul 17, 5:15 PM CDT | Severe Thunderstorm Warning | DLH | Itasca, Saint Louis | 30 min |
| Jul 17, 5:30 PM CDT | Special Weather Statement | DLH | Lake | 30 min |
| Jul 17, 5:41 PM CDT | Severe Thunderstorm Warning | DLH | Saint Louis | 21 min |
| Jul 17, 6:28 PM CDT | Special Weather Statement | DLH | Carlton | 47 min |
| Jul 17, 6:33 PM CDT | Special Marine Warning | DLH | 53 min | |
| Jul 17, 6:40 PM CDT | Special Marine Warning | DLH | 80 min | |
| Jul 17, 4:56 PM CDT | Special Weather Statement | DLH | Ashland, Bayfield, Douglas | 19 min |
| Jul 17, 5:38 PM CDT | Special Weather Statement | DLH | Ashland, Bayfield, Iron | 22 min |
| Jul 17, 5:45 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Douglas | 30 min |
| Jul 17, 6:09 PM CDT | Special Weather Statement | DLH | Iron | 36 min |
| Jul 17, 6:14 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron | 46 min |
| Jul 17, 6:30 PM CDT | Severe Thunderstorm Warning | DLH | Ashland, Bayfield, Iron, Price, Sawyer | 30 min |
| Jul 17, 6:52 PM CDT | Flash Flood Warning | DLH | Ashland, Bayfield, Iron, Price, Sawyer | 3 hr |
Nearby
Flash Flood Watches in Wisconsin, 2011Flash Flood Watches in Minnesota, 2011Every flash flood watch 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.