Alert archive / Wisconsin / Flash Flood Warnings in 2018

Flash Flood Warning 18, NWS Duluth, MN

July 12, 2018Pine County, Minnesota; Burnett County, Douglas County, Wisconsin

NWS Duluth, MN issued this flash flood warning at Jul 12, 2018, 4:20 AM CDT for Pine County, Minnesota; Burnett County, Douglas County, Wisconsin. It was in force for 5 hr. 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 12, 2018, 4:20 AM CDT (09:20 UTC)
Expired: Jul 12, 2018, 9:45 AM CDT
In force: 5 hr
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Flood severity: None

Counties Pine County, MN, Burnett County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 77 km from the middle of the area, began a volume at 09:19 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 00:00Z, 9.3 hours before the alert went out and 175 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 3531 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1135 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 221 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 12.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 12, 3:55 AM CDT, 25 minutes earlier.

Area forecast discussion, Jul 12, 3:55 AM CDT, 25 minutes before

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Hazardous weather outlook, Jul 11, 3:13 PM CDT, 13 hours 7 minutes before

Hazardous Weather Outlook
National Weather Service Duluth MN
313 PM CDT Wed Jul 11 2018

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-121200-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
313 PM CDT Wed Jul 11 2018

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...This afternoon and Tonight

Strong northeast winds will increase the threat of rip currents
today through this evening for areas near the Twin Ports,
including the beaches of Duluth and Superior. A Beach Hazards
Statement has been issued for these areas.

Strong to severe storms are likely to develop across north-
central Minnesota late this afternoon or this evening, tracking
southeast across much of northeast Minnesota and parts of
northwest Wisconsin this evening and overnight. These storms could
produce very large hail, damaging winds, tornadoes, and flash
flooding. Areas of north-central Minnesota from the Brainerd Lakes
region north to the international border are at the greatest risk
for very large hail and tornadoes. A Flash Flood Watch has been
issued for much of central and northeast MN, and parts of far
northwest Wisconsin, tonight through early Thursday.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thunderstorms will remain possible Thursday and Thursday evening,
mainly over northwest Wisconsin. Some of those storms could be
severe and produce heavy rainfall over portions of northwest
Wisconsin Thursday afternoon and evening.

A chance of thunderstorms returns to the area Saturday night
and Sunday.

.SPOTTER INFORMATION STATEMENT...

Skywarn Spotters will likely be needed very late this afternoon
and this evening.

LSZ121-140>148-121200-
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-
313 PM CDT Wed Jul 11 2018

This Hazardous Weather Outlook is for portions of the Nearshore
waters of western Lake Superior.

.DAY ONE...This afternoon and Tonight

A Small Craft Advisory remains in effect from Taconite Harbor, to
Duluth, to Bayfield into the evening.

In addition to the high winds and waves, we will likely see
numerous thunderstorms develop overnight. Some of the storms may
be strong to severe with damaging winds and large hail.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thunderstorms are possible from Saturday night into Sunday night.

DAP/G2

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 12, 3:33 AM CDT, 47 minutes before

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Special weather statement, Jul 12, 3:34 AM CDT, 46 minutes before

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Local storm report, Jul 12, 3:37 AM CDT, 43 minutes before

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Local storm report, Jul 12, 3:50 AM CDT, 30 minutes before

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Special weather statement, Jul 12, 3:53 AM CDT, 27 minutes before

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Local storm report, Jul 12, 4:19 AM CDT, 1 minute before

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The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 11, 8:58 PM CDT	Special Weather Statement	DLH	Koochiching	32 min
Jul 11, 9:32 PM CDT	Special Weather Statement	DLH	Koochiching	13 min
Jul 11, 9:37 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	38 min
Jul 11, 10:20 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	40 min
Jul 11, 10:42 PM CDT	Tornado Warning	DLH	Koochiching	33 min
Jul 11, 11:10 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Koochiching	50 min
Jul 11, 11:42 PM CDT	Severe Thunderstorm Warning	DLH	Cass	48 min
Jul 11, 11:59 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Itasca	46 min
Jul 12, 12:18 AM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	42 min
Jul 12, 12:34 AM CDT	Flash Flood Warning	DLH	Itasca, Koochiching	3 hr
Jul 12, 12:42 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Itasca, Saint Louis	48 min
Jul 12, 12:53 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Crow Wing	37 min
Jul 12, 12:59 AM CDT	Special Weather Statement	DLH	Saint Louis	31 min
Jul 12, 1:16 AM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	29 min
Jul 12, 1:27 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Itasca, Saint Louis	48 min
Jul 12, 1:33 AM CDT	Special Weather Statement	DLH	Saint Louis	42 min
Jul 12, 1:47 AM CDT	Special Weather Statement	DLH	Crow Wing	28 min
Jul 12, 1:56 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass, Crow Wing	49 min
Jul 12, 2:14 AM CDT	Special Weather Statement	DLH	Carlton	16 min
Jul 12, 2:15 AM CDT	Special Weather Statement	DLH	Saint Louis	45 min
Jul 12, 2:19 AM CDT	Flash Flood Warning	DLH	Aitkin, Cass, Crow Wing, Itasca	4 hr
Jul 12, 2:22 AM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	38 min
Jul 12, 2:31 AM CDT	Special Marine Warning	DLH		47 min
Jul 12, 2:41 AM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Cass, Crow Wing	49 min
Jul 12, 3:00 AM CDT	Flash Flood Warning	DLH	Aitkin, Carlton, Cass, Crow Wing, Pine, Saint Louis	3 hr
Jul 12, 3:17 AM CDT	Areal Flood Warning	DLH	Itasca, Koochiching, Saint Louis	9 hr
Jul 12, 3:34 AM CDT	Special Weather Statement	DLH	Pine	26 min
Jul 12, 3:53 AM CDT	Special Weather Statement	DLH	Pine	37 min
Jul 12, 4:07 AM CDT	Small Craft Advisory	DLH		12 hr
Jul 12, 4:24 AM CDT	Special Weather Statement	DLH	Pine	36 min
Jul 12, 5:57 AM CDT	Flash Flood Warning	DLH	Aitkin, Crow Wing, Pine	4 hr
Jul 12, 6:21 AM CDT	Special Weather Statement	DLH	Pine	24 min
Jul 12, 6:28 AM CDT	Severe Thunderstorm Warning	DLH	Pine	13 min
Jul 12, 9:42 AM CDT	Areal Flood Warning	DLH	Aitkin, Carlton, Crow Wing, Pine	6 hr
Jul 12, 11:45 AM CDT	Special Weather Statement	DLH	Chisago	15 min
Jul 12, 4:01 PM CDT	River Flood Warning	DLH	Aitkin, Crow Wing	42 hr
Jul 12, 8:31 AM CDT	Special Weather Statement	DLH	Burnett	29 min
Jul 12, 9:01 AM CDT	Special Weather Statement	DLH	Burnett	29 min
Jul 12, 9:30 AM CDT	Special Weather Statement	DLH	Burnett	30 min
Jul 12, 11:09 AM CDT	Special Weather Statement	DLH	Burnett	36 min
Jul 12, 5:15 PM CDT	Special Weather Statement	DLH	Burnett	30 min
Jul 12, 5:57 PM CDT	Special Weather Statement	DLH	Burnett, Washburn	33 min
Jul 12, 6:34 PM CDT	Special Weather Statement	DLH	Washburn	26 min
Jul 12, 6:52 PM CDT	Special Weather Statement	DLH	Washburn	23 min

Nearby

Flash Flood Warnings in Wisconsin, 2018 Flash Flood Warnings in Minnesota, 2018 Every flash flood warning in 2018

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.