Alert archive / Minnesota / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 70, NWS Duluth, MN

July 29, 2014Carlton County, Saint Louis County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 29, 2014, 7:29 PM CDT for Carlton County, Saint Louis County, Minnesota. It was in force for 31 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 29, 2014, 7:29 PM CDT (00:29 UTC)
Expired
Jul 29, 2014, 8:00 PM CDT
In force
31 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Carlton County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 39 km from the middle of the area, began a volume at 00:32 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

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.5 hours before the alert went out and 452 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, Green Bay/Straub, WI at 00:00Z on 2014-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 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, Green Bay/Straub, WI at 00:00Z on 2014-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.19395878Sfc1 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
5 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1325 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
56 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 29, 6:37 PM CDT, 52 minutes earlier.

Area forecast discussion, Jul 29, 6:37 PM CDT, 52 minutes before
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Hazardous weather outlook, Jul 29, 2:56 PM CDT, 4 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
256 PM CDT TUE JUL 29 2014

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-302000-
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-
256 PM CDT TUE JUL 29 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MINNESOTA AND
NORTHWEST WISCONSIN.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL BE FOUND ACROSS MUCH OF THE NORTHLAND
THROUGH THE EVENING. SOME OF THE STORMS WILL BECOME STRONG AND
CONTAIN GUSTY WINDS AND HAIL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED THUNDERSTORMS ARE EXPECTED WEDNESDAY AFTERNOON...AND
AGAIN THURSDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR
TONIGHT.

LSZ121-140>148-302000-
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-
256 PM CDT TUE JUL 29 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NEARSHORE WATERS OF
WESTERN LAKE SUPERIOR.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS WILL BE FOUND ACROSS WESTERN LAKE SUPERIOR THROUGH
THE EVENING. SOME OF THE STORMS WILL CONTAIN GUSTY WINDS AND
HAIL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

SCATTERED THUNDERSTORMS ARE EXPECTED WEDNESDAY AFTERNOON...AND
AGAIN FRIDAY.

GRANING

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 29, 5:22 PM CDT, 2 hours 7 minutes before
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Special weather statement, Jul 29, 5:59 PM CDT, 1 hour 30 minutes before
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Special weather statement, Jul 29, 6:03 PM CDT, 1 hour 26 minutes before
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Special weather statement, Jul 29, 6:45 PM CDT, 44 minutes before
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Special weather statement, Jul 29, 6:52 PM CDT, 37 minutes before
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Special weather statement, Jul 29, 7:26 PM CDT, 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 7:46 PM CDTSpecial Weather StatementDLHSaint Louis29 min
Jul 29, 8:14 PM CDTSpecial Weather StatementDLHCarlton31 min
Jul 30, 1:24 PM CDTSpecial Weather StatementDLH21 min
Jul 30, 1:39 PM CDTSpecial Weather StatementDLHCook36 min
Jul 30, 2:10 PM CDTSpecial Weather StatementDLHCook35 min
Jul 30, 2:22 PM CDTSpecial Weather StatementDLH23 min
Jul 29, 7:26 PM CDTSpecial Weather StatementDLHDouglas34 min
Jul 30, 2:21 PM CDTSpecial Weather StatementDLHWashburn39 min
Jul 30, 2:27 PM CDTSpecial Weather StatementDLHDouglas33 min
Jul 30, 2:54 PM CDTSevere Thunderstorm WarningDLHDouglas, Washburn51 min
Jul 30, 3:03 PM CDTSpecial Weather StatementDLHSawyer42 min
Jul 30, 3:34 PM CDTSevere Thunderstorm WarningDLHDouglas, Washburn41 min
Jul 30, 3:37 PM CDTSevere Thunderstorm WarningDLHSawyer, Washburn38 min
Jul 30, 4:12 PM CDTSevere Thunderstorm WarningDLHWashburn55 min
Jul 30, 4:14 PM CDTSevere Thunderstorm WarningDLHSawyer, Washburn46 min
Jul 30, 4:30 PM CDTSpecial Weather StatementDLHAshland30 min
Jul 30, 4:38 PM CDTSpecial Weather StatementDLHBayfield22 min
Jul 30, 5:03 PM CDTSpecial Weather StatementDLHAshland42 min
Jul 30, 5:11 PM CDTSevere Thunderstorm WarningDLHAshland, Iron34 min
Jul 30, 5:14 PM CDTSpecial Weather StatementDLHBayfield16 min
Jul 30, 5:35 PM CDTSpecial Weather StatementDLHBayfield25 min
Jul 30, 5:44 PM CDTSpecial Weather StatementDLHIron46 min
Jul 30, 6:00 PM CDTSpecial Weather StatementDLHSawyer30 min
Jul 30, 6:25 PM CDTSpecial Weather StatementDLHSawyer35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2014Every severe thunderstorm warning in 2014

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.