Alert archive / Minnesota / Special Weather Statements in 2017

Special Weather Statement, NWS Duluth, MN

August 4, 2017Saint Louis County, Minnesota

NWS Duluth, MN issued this special weather statement at Aug 4, 2017, 1:33 PM CDT for Saint Louis County, Minnesota. It was in force for 12 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 4, 2017, 1:33 PM CDT (18:33 UTC)
Expired
Aug 4, 2017, 1:45 PM CDT
In force
12 min
Issued by
NWS Duluth, MN

County Saint Louis County, MN

The radar

The Duluth radar (KDLH), 136 km from the middle of the area, began a volume at 18:35 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, 6.6 hours before the alert went out and 76 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-pSkew-T log-p diagram, International Fa, MN at 12:00Z on 2017-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 12:00Z on 2017-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
56 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
129 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 4, 12:23 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 4, 12:23 PM CDT, 1 hour 10 minutes before
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Hazardous weather outlook, Aug 4, 10:42 AM CDT, 2 hours 51 minutes before
Hazardous Weather Outlook
National Weather Service Duluth MN
1042 AM CDT Fri Aug 4 2017

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-051030-
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-
1042 AM CDT Fri Aug 4 2017

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

.DAY ONE...Today and Tonight

A few thunderstorms are possible through this evening. The storms
are not expected to be severe.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Small chances for thunderstorms are expected to exist during the
afternoon and early evening hours this weekend and then again
Tuesday into Wednesday. At this time, the threat of any severe
storms appears very low.

.SPOTTER INFORMATION STATEMENT...

Skywarn Spotter activation is not anticipated today or tonight but
any reports of heavy rainfall, gusty winds, or hail are
appreciated.

LSZ121-140>148-051030-
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-
1042 AM CDT Fri Aug 4 2017

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

.DAY ONE...Today and Tonight

Strong north to northwest winds gusting to 25 knots at times will
affect the South Shore of western Lake Superior this morning and
afternoon. Associated wave heights will build to between 3 to 5
feet in some places, especially from the Apostle Islands to Saxon
Harbor, resulting in high waves and dangerous conditions for
small craft. Please refer to the latest Nearshore Marine Forecast
and Marine Weather Message for details on a Small Craft Advisory
that remains in affect.

A few thunderstorms are possible this afternoon and early evening.
The storms are not expected to be severe.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Small chances for thunderstorms are expected to exist during the
afternoon and early evening hours this weekend and then again
Tuesday into Wednesday. At this time, the threat of any severe
storms appears very low.

GSF

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, Aug 4, 9:47 AM CDT, 3 hours 46 minutes before
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Special weather statement, Aug 4, 1:04 PM CDT, 29 minutes before
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Special weather statement, Aug 4, 1:20 PM CDT, 13 minutes before
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Special weather statement, Aug 4, 1:24 PM CDT, 9 minutes before
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Special weather statement, Aug 4, 1:33 PM CDT, 0 minutes before
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Special weather statement, Aug 4, 1:33 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 10:14 PM CDTSmall Craft AdvisoryDLH12 hr
Aug 4, 9:49 AM CDTSmall Craft AdvisoryDLH6 hr
Aug 4, 1:04 PM CDTSpecial Weather StatementDLHItasca11 min
Aug 4, 1:20 PM CDTSpecial Weather StatementDLHSaint Louis10 min
Aug 4, 1:24 PM CDTSpecial Weather StatementDLHSaint Louis21 min
Aug 4, 1:48 PM CDTSpecial Weather StatementDLHCarlton12 min
Aug 4, 1:55 PM CDTSpecial Weather StatementDLHSaint Louis20 min
Aug 4, 2:01 PM CDTSpecial Weather StatementDLHCarlton14 min
Aug 4, 2:12 PM CDTSpecial Weather StatementDLHAitkin18 min
Aug 4, 2:36 PM CDTSpecial Weather StatementDLHAitkin9 min
Aug 4, 2:37 PM CDTSpecial Weather StatementDLH23 min
Aug 4, 3:00 PM CDTSpecial Weather StatementDLH15 min
Aug 4, 3:16 PM CDTSpecial Weather StatementDLHPine14 min
Aug 4, 3:28 PM CDTSpecial Weather StatementDLHCarlton17 min
Aug 4, 3:34 PM CDTSpecial Weather StatementDLHPine11 min
Aug 4, 4:32 PM CDTSpecial Weather StatementDLHLake13 min
Aug 4, 5:36 PM CDTSpecial Weather StatementDLHAitkin9 min
Aug 4, 5:37 PM CDTSpecial Weather StatementDLHItasca8 min
Aug 4, 5:49 PM CDTSpecial Weather StatementDLHAitkin11 min
Aug 4, 2:04 PM CDTSpecial Weather StatementDLHDouglas11 min
Aug 4, 2:13 PM CDTSpecial Weather StatementDLHDouglas17 min
Aug 4, 2:18 PM CDTSpecial Weather StatementDLHWashburn12 min
Aug 4, 2:30 PM CDTSpecial Weather StatementDLHDouglas15 min
Aug 4, 2:50 PM CDTSpecial Weather StatementDLHDouglas10 min
Aug 4, 2:55 PM CDTSpecial Weather StatementDLHDouglas20 min
Aug 4, 2:59 PM CDTSpecial Weather StatementDLHDouglas16 min
Aug 4, 3:02 PM CDTSpecial Weather StatementDLHDouglas13 min
Aug 4, 3:12 PM CDTSpecial Weather StatementDLHBurnett18 min
Aug 4, 3:15 PM CDTSpecial Weather StatementDLHDouglas15 min
Aug 4, 3:27 PM CDTSpecial Weather StatementDLHDouglas18 min
Aug 4, 3:30 PM CDTSpecial Weather StatementDLHBayfield15 min
Aug 4, 3:36 PM CDTSpecial Weather StatementDLHDouglas9 min
Aug 4, 3:54 PM CDTSpecial Weather StatementDLHAshland21 min
Aug 4, 4:05 PM CDTSpecial Weather StatementDLHBurnett10 min
Aug 4, 4:11 PM CDTSpecial Weather StatementDLHAshland19 min
Aug 4, 4:13 PM CDTSpecial Weather StatementDLHAshland17 min
Aug 4, 4:16 PM CDTSpecial Weather StatementDLHWashburn14 min
Aug 4, 4:21 PM CDTSevere Thunderstorm WarningDLHSawyer, Washburn24 min
Aug 4, 4:38 PM CDTSpecial Weather StatementDLHBurnett22 min
Aug 4, 4:59 PM CDTSpecial Weather StatementDLHWashburn16 min

Nearby

Special Weather Statements in Minnesota, 2017Every 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.