Alert archive / Minnesota / Special Weather Statements in 2017

Special Weather Statement, NWS Duluth, MN

August 8, 2017Saint Louis County, Minnesota

NWS Duluth, MN issued this special weather statement at Aug 8, 2017, 6:08 PM CDT for Saint Louis County, Minnesota. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 8, 2017, 6:08 PM CDT (23:08 UTC)
Expired: Aug 8, 2017, 6:30 PM CDT
In force: 22 min
Issued by: NWS Duluth, MN

County Saint Louis County, MN

The radar

The Duluth radar (KDLH), 127 km from the middle of the area, began a volume at 23:10 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, 11.1 hours before the alert went out and 88 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: 35 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 8, 2:46 PM CDT, 3 hours 22 minutes earlier.

Area forecast discussion, Aug 8, 2:46 PM CDT, 3 hours 22 minutes before

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Hazardous weather outlook, Aug 8, 2:46 PM CDT, 3 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Duluth MN
246 PM CDT Tue Aug 8 2017

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-091215-
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-
246 PM CDT Tue Aug 8 2017

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

.DAY ONE...This afternoon and Tonight

Thunderstorms are possible across the Minnesota Arrowhead and far
northern Minnesota through this evening. Some storms could have
small hail.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorms are possible across northeast Minnesota and
northwest Wisconsin late Wednesday morning through Wednesday
evening. Some storms could have small hail and heavy rainfall
rates.

Thunderstorms are possible Wednesday night through Thursday
evening. After Thursday, the next chance of thunderstorms is
Sunday afternoon and Monday afternoon over the Arrowhead.

.SPOTTER INFORMATION STATEMENT...

Skywarn Spotters may be needed through this evening to report
small hail size for storms in the Minnesota Arrowhead to the
National Weather Service.

LSZ121-140>148-091215-
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-
246 PM CDT Tue Aug 8 2017

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

.DAY ONE...This afternoon and Tonight

There is a chance of thunderstorms along the north shore of Lake
Superior this afternoon and evening north of French River. Small
hail, lightning and heavy downpours are possible with the stronger
storms.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Thunderstorms are expected Wednesday through Thursday evening.
There is a chance of thunderstorms along the north shore Sunday
afternoon and again Monday afternoon.

G2/GSF

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, Aug 8, 2:00 PM CDT, 4 hours 8 minutes before

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Special weather statement, Aug 8, 2:08 PM CDT, 4 hours before

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Special weather statement, Aug 8, 3:00 PM CDT, 3 hours 8 minutes before

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Special weather statement, Aug 8, 3:14 PM CDT, 2 hours 54 minutes before

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Special weather statement, Aug 8, 5:31 PM CDT, 37 minutes before

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Special weather statement, Aug 8, 6:08 PM CDT, 0 minutes 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
Aug 8, 2:00 PM CDT	Special Weather Statement	DLH	Lake	15 min
Aug 8, 2:08 PM CDT	Special Weather Statement	DLH	Saint Louis	22 min
Aug 8, 3:00 PM CDT	Special Weather Statement	DLH	Cook	15 min
Aug 8, 3:14 PM CDT	Special Weather Statement	DLH	Cook	31 min
Aug 8, 6:11 PM CDT	Special Weather Statement	DLH	Itasca	34 min
Aug 8, 6:42 PM CDT	Special Weather Statement	DLH	Saint Louis	18 min
Aug 8, 6:46 PM CDT	Special Weather Statement	DLH	Itasca	14 min
Aug 8, 6:58 PM CDT	Special Weather Statement	DLH	Saint Louis	17 min
Aug 8, 5:31 PM CDT	Special Weather Statement	DLH	Bayfield	14 min

Nearby

Special Weather Statements in Minnesota, 2017 Every special weather statement in 2017

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.