Alert archive / Minnesota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 45, NWS Duluth, MN

July 15, 2019Koochiching County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 15, 2019, 12:35 PM CDT for Koochiching County, Minnesota. It was in force for 40 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 15, 2019, 12:35 PM CDT (17:35 UTC)
Expired
Jul 15, 2019, 1:15 PM CDT
In force
40 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Koochiching County, MN

The radar

The Duluth radar (KDLH), 196 km from the middle of the area, began a volume at 17:38 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, 5.6 hours before the alert went out and 378 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, Minneapolis, MN at 12:00Z on 2019-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1021 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, Minneapolis, MN at 12:00Z on 2019-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.193958Sfc1 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
1021 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
1307 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 15, 6:49 AM CDT, 5 hours 46 minutes earlier.

Area forecast discussion, Jul 15, 6:49 AM CDT, 5 hours 46 minutes before
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Hazardous weather outlook, Jul 15, 4:32 AM CDT, 8 hours 3 minutes before
Hazardous Weather Outlook
National Weather Service Duluth MN
432 AM CDT Mon Jul 15 2019

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-161030-
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-
432 AM CDT Mon Jul 15 2019

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

.DAY ONE...Today and Tonight

Thunderstorms will occur again today into tonight across the
Northland. Thunderstorms this morning will pose mainly a heavy
rain and pea to dime size hail threat but storms this afternoon
through late evening will be capable of producing large hail,
damaging wind, and more heavy rainfall.

Heat indices will be from 90 to 100 this afternoon over much of
the area.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Thunderstorms will be possible through much of the upcoming week,
some strong to severe, especially Wednesday afternoon through
Wednesday night. The main threats will be large hail, damaging
winds, and frequent lightning. Flash flooding will also be
possible Wednesday night.

Conditions will remain warm and muggy through the week, with heat
indicies approaching 90 degrees for areas away from Lake Superior.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters may be needed this afternoon into the late
evening.

LSZ121-140>148-161030-
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-
432 AM CDT Mon Jul 15 2019

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

.DAY ONE...Today and Tonight

Another round of thunderstorms will be possible over western Lake
Superior this afternoon and evening, with some storms strong to
severe. The main threats will be large hail, strong gusty winds in
excess of 33 knots, and frequent cloud-to-water lightning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Several rounds of thunderstorms are forecast during much of this
week. Some storms could be strong to severe, with gusty winds, large
hail, and frequent cloud-to-water lightning the main threats.

Melde/JTS

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, Jul 15, 11:20 AM CDT, 1 hour 15 minutes before
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Special weather statement, Jul 15, 11:31 AM CDT, 1 hour 4 minutes before
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Special weather statement, Jul 15, 11:49 AM CDT, 46 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 7:03 PM CDTSpecial Weather StatementDLHAitkin12 min
Jul 14, 7:13 PM CDTSevere Thunderstorm WarningDLHAitkin, Carlton, Pine47 min
Jul 14, 7:30 PM CDTAreal Flood WarningDLHCrow Wing73 min
Jul 14, 8:14 PM CDTSpecial Weather StatementDLHPine31 min
Jul 14, 8:44 PM CDTSpecial Weather StatementDLHPine31 min
Jul 14, 9:02 PM CDTSpecial Weather StatementDLH13 min
Jul 14, 9:15 PM CDTSpecial Marine WarningDLH60 min
Jul 14, 10:00 PM CDTSpecial Weather StatementDLH15 min
Jul 15, 11:20 AM CDTSpecial Weather StatementDLHKoochiching10 min
Jul 15, 11:31 AM CDTSpecial Weather StatementDLHKoochiching14 min
Jul 15, 11:49 AM CDTSpecial Weather StatementDLHKoochiching11 min
Jul 15, 12:01 PM CDTSevere Thunderstorm WarningDLHKoochiching44 min
Jul 15, 12:53 PM CDTSpecial Weather StatementDLHKoochiching22 min
Jul 15, 1:03 PM CDTSevere Thunderstorm WarningDLHItasca, Koochiching42 min
Jul 15, 1:17 PM CDTSevere Thunderstorm WarningDLHItasca, Koochiching, Saint Louis28 min
Jul 15, 1:52 PM CDTSpecial Weather StatementDLHKoochiching38 min
Jul 15, 1:54 PM CDTSpecial Weather StatementDLHItasca51 min
Jul 15, 2:22 PM CDTSevere Thunderstorm WarningDLHItasca38 min
Jul 15, 2:34 PM CDTSpecial Weather StatementDLHSaint Louis41 min
Jul 15, 2:45 PM CDTSpecial Weather StatementDLHSaint Louis15 min
Jul 15, 2:53 PM CDTSpecial Weather StatementDLHSaint Louis22 min
Jul 15, 2:54 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis51 min
Jul 15, 3:03 PM CDTSpecial Weather StatementDLH12 min
Jul 15, 3:18 PM CDTSpecial Weather StatementDLHSaint Louis12 min
Jul 15, 3:33 PM CDTSevere Thunderstorm WarningDLHCook, Lake, Saint Louis42 min
Jul 15, 3:38 PM CDTSpecial Weather StatementDLHSaint Louis22 min
Jul 15, 3:40 PM CDTSpecial Weather StatementDLHCarlton20 min
Jul 15, 3:47 PM CDTSpecial Weather StatementDLHMorrison13 min
Jul 15, 4:02 PM CDTSpecial Weather StatementDLHMorrison13 min
Jul 15, 4:12 PM CDTSevere Thunderstorm WarningDLHCook, Lake63 min
Jul 15, 4:18 PM CDTSpecial Weather StatementDLHMorrison12 min
Jul 15, 4:19 PM CDTSpecial Weather StatementDLHSaint Louis11 min
Jul 15, 4:26 PM CDTSevere Thunderstorm WarningDLHSaint Louis34 min
Jul 15, 4:31 PM CDTSpecial Marine WarningDLH44 min
Jul 15, 4:39 PM CDTSpecial Marine WarningDLH51 min
Jul 15, 4:53 PM CDTSevere Thunderstorm WarningDLHLake, Saint Louis30 min
Jul 15, 5:00 PM CDTSevere Thunderstorm WarningDLHLake15 min
Jul 15, 5:04 PM CDTSpecial Marine WarningDLH56 min
Jul 15, 5:24 PM CDTSpecial Weather StatementDLHChisago21 min
Jul 15, 5:27 PM CDTSpecial Marine WarningDLH33 min
Jul 15, 5:31 PM CDTSpecial Marine WarningDLH44 min
Jul 15, 5:38 PM CDTSevere Thunderstorm WarningDLHPine37 min
Jul 15, 5:43 PM CDTSpecial Marine WarningDLH62 min
Jul 15, 12:10 AM CDTSpecial Weather StatementDLHIron35 min
Jul 15, 1:08 AM CDTAreal Flood AdvisoryDLHAshland, Iron4 hr
Jul 15, 1:35 AM CDTAreal Flood AdvisoryDLHAshland, Bayfield, Iron3 hr
Jul 15, 4:56 AM CDTSpecial Weather StatementDLHSawyer34 min
Jul 15, 5:36 AM CDTSpecial Weather StatementDLHSawyer24 min
Jul 15, 6:13 AM CDTSpecial Weather StatementDLHRusk32 min
Jul 15, 3:05 PM CDTSpecial Weather StatementDLHPrice25 min
Jul 15, 3:30 PM CDTSpecial Weather StatementDLHPrice15 min
Jul 15, 3:48 PM CDTSpecial Weather StatementDLHPrice12 min
Jul 15, 5:03 PM CDTSpecial Weather StatementDLHWashburn12 min
Jul 15, 5:18 PM CDTSpecial Weather StatementDLHSawyer12 min
Jul 15, 5:30 PM CDTSpecial Weather StatementDLHSawyer15 min
Jul 15, 5:34 PM CDTSpecial Weather StatementDLHWashburn11 min
Jul 15, 5:40 PM CDTSevere Thunderstorm WarningDLHSawyer23 min
Jul 15, 5:45 PM CDTSpecial Weather StatementDLHBayfield30 min
Jul 15, 6:02 PM CDTSpecial Weather StatementDLHAshland, Bayfield, Douglas28 min
Jul 15, 6:12 PM CDTSpecial Weather StatementDLHBurnett18 min
Jul 15, 6:26 PM CDTSpecial Weather StatementDLHSawyer19 min
Jul 15, 6:32 PM CDTSpecial Weather StatementDLHWashburn13 min
Jul 15, 6:35 PM CDTAreal Flood WarningDLHSawyer2 hr
Jul 15, 6:37 PM CDTSpecial Weather StatementDLHAshland23 min
Jul 15, 6:52 PM CDTSpecial Weather StatementDLHSawyer23 min
Jul 15, 6:56 PM CDTSpecial Weather StatementDLHDouglas19 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2019Every severe thunderstorm warning in 2019

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.