Alert archive / Minnesota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 87, NWS Duluth, MN

August 26, 2013Aitkin County, Cass County, Crow Wing County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Aug 26, 2013, 5:42 PM CDT for Aitkin County, Cass County, Crow Wing County, Minnesota. It was in force for 48 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: Aug 26, 2013, 5:42 PM CDT (22:42 UTC)
Expired: Aug 26, 2013, 6:30 PM CDT
In force: 48 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Aitkin County, MN, Cass County, MN, Crow Wing County, MN

The radar

The Duluth radar (KDLH), 133 km from the middle of the area, began a volume at 22:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 26, 5:41 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.7 hours before the alert went out and 205 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: 1878 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 292 m²/s²
0-3 km storm-relative helicity: 278 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

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 Aug 26, 3:12 PM CDT, 2 hours 30 minutes earlier.

Area forecast discussion, Aug 26, 3:12 PM CDT, 2 hours 30 minutes before

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Hazardous weather outlook, Aug 26, 3:39 PM CDT, 2 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DULUTH MN
339 PM CDT MON AUG 26 2013

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-271130-
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-
339 PM CDT MON AUG 26 2013

...SLIGHT RISK OF SEVERE STORMS LATE THIS AFTERNOON AND TONIGHT...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A HEAT ADVISORY REMAINS IN EFFECT FOR THE SOUTHERN HALF OF
THE NORTHLAND THIS EVENING. SEE THE LATEST WEATHER MESSAGE FOR
DETAILS.

THERE IS A MODERATE RISK OF RIP CURRENTS ALONG THE BEACHES OF
DULUTH AND SUPERIOR. NORTHEAST WINDS UP TO 10 TO 15 MPH LATE THIS
AFTERNOON WILL GENERATE WAVES OF 1 TO 3 FEET THROUGH THE EARLY
EVENING.

ANOTHER ROUND OF STORMS WILL DEVELOP LATE THIS AFTERNOON AND EARLY
EVENING. SOME OF THE STORMS MAY BE SEVERE...GENERALLY ALONG AND
SOUTH OF HIGHWAY 2. THE MAIN THREATS WILL BE DAMAGING
WINDS...HEAVY RAIN...AND LARGE HAIL.

ADDITIONAL HEAVY RAIN THIS EVENING AND TONIGHT IN PARTS OF
NORTHWEST WISCONSIN HAVE PROMPTED A FLASH FLOOD WATCH FOR
WASHBURN...SAYWER AND PRICE COUNTIES. LOCALIZED FLASH FLOODING IS
POSSIBLE ALONG STREAMS AND CREEKS AND LOW LYING AREAS...ESPECIALLY
AREAS THAT RECEIVED HEAVY RAIN LAST NIGHT. CHECK THE LATEST FLASH
FLOOD WATCH FOR ADDITIONAL INFORMATION.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A FEW STRONG THUNDERSTORMS ARE POSSIBLE IN NORTHWEST WISCONSIN
EARLY TUESDAY MORNING.

ADDITIONAL STORMS ARE POSSIBLE THURSDAY INTO THE WEEKEND.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND
TONIGHT.

LSZ121-140>148-271130-
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-
339 PM CDT MON AUG 26 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON
AND TONIGHT...MAINLY ALONG THE SOUTH SHORE. THE MAIN THREATS WILL
BE DAMAGING WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ADDITIONAL STORMS ARE POSSIBLE THURSDAY INTO THE WEEKEND.

TENTINGER

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 26, 4:50 PM CDT, 52 minutes before

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Special weather statement, Aug 26, 4:55 PM CDT, 47 minutes before

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Special weather statement, Aug 26, 5:16 PM CDT, 26 minutes before

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Special weather statement, Aug 26, 5:20 PM CDT, 22 minutes before

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Special weather statement, Aug 26, 5:31 PM CDT, 11 minutes before

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Special weather statement, Aug 26, 5:33 PM CDT, 9 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 25, 7:00 PM CDT	Special Weather Statement	DLH	Hubbard	45 min
Aug 25, 7:25 PM CDT	Special Weather Statement	DLH	Itasca	35 min
Aug 25, 7:41 PM CDT	Special Weather Statement	DLH	Saint Louis	34 min
Aug 25, 7:49 PM CDT	Special Weather Statement	DLH	Itasca	41 min
Aug 25, 8:02 PM CDT	Special Weather Statement	DLH	Saint Louis	43 min
Aug 25, 8:11 PM CDT	Special Weather Statement	DLH	Lake	49 min
Aug 25, 8:20 PM CDT	Severe Thunderstorm Warning	DLH	Itasca, Saint Louis	40 min
Aug 25, 8:46 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	44 min
Aug 25, 9:30 PM CDT	Special Weather Statement	DLH	Lake, Saint Louis	45 min
Aug 25, 9:43 PM CDT	Special Weather Statement	DLH	Carlton	47 min
Aug 25, 10:09 PM CDT	Special Weather Statement	DLH	Lake	36 min
Aug 25, 10:40 PM CDT	Areal Flood Advisory	DLH	Cook, Lake	12 hr
Aug 25, 10:44 PM CDT	Special Marine Warning	DLH		61 min
Aug 25, 10:53 PM CDT	Special Marine Warning	DLH		52 min
Aug 25, 11:50 PM CDT	Special Marine Warning	DLH		40 min
Aug 26, 4:50 PM CDT	Special Weather Statement	DLH	Itasca	40 min
Aug 26, 4:55 PM CDT	Special Weather Statement	DLH	Cass	20 min
Aug 26, 5:16 PM CDT	Special Weather Statement	DLH	Cass	14 min
Aug 26, 5:20 PM CDT	Special Weather Statement	DLH	Aitkin	25 min
Aug 26, 5:31 PM CDT	Special Weather Statement	DLH		44 min
Aug 26, 5:33 PM CDT	Special Weather Statement	DLH	Crow Wing	12 min
Aug 26, 5:42 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Crow Wing	48 min
Aug 26, 6:02 PM CDT	Special Weather Statement	DLH	Carlton	13 min
Aug 26, 6:11 PM CDT	Special Weather Statement	DLH	Carlton	19 min
Aug 26, 6:14 PM CDT	Special Weather Statement	DLH	Saint Louis	16 min
Aug 26, 6:22 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Crow Wing, Pine	38 min
Aug 26, 6:23 PM CDT	Severe Thunderstorm Warning	DLH	Lake, Saint Louis	52 min
Aug 26, 6:29 PM CDT	Special Weather Statement	DLH	Saint Louis	16 min
Aug 26, 6:31 PM CDT	Special Weather Statement	DLH	Carlton	14 min
Aug 26, 6:44 PM CDT	Special Weather Statement	DLH	Saint Louis	16 min
Aug 26, 6:59 PM CDT	Special Weather Statement	DLH	Saint Louis	16 min
Aug 25, 11:03 PM CDT	Special Weather Statement	DLH	Bayfield, Douglas	27 min
Aug 25, 11:28 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield, Iron	48 min
Aug 26, 12:55 AM CDT	Areal Flood Advisory	DLH	Ashland, Bayfield	8 hr
Aug 26, 1:32 AM CDT	Special Weather Statement	DLH	Ashland, Bayfield	13 min
Aug 26, 1:51 AM CDT	Areal Flood Advisory	DLH	Ashland, Bayfield, Douglas, Iron	8 hr
Aug 26, 2:24 AM CDT	Special Weather Statement	DLH	Douglas, Iron	6 min
Aug 26, 3:03 AM CDT	Special Weather Statement	DLH	Ashland, Douglas, Iron, Sawyer	42 min
Aug 26, 3:32 AM CDT	Areal Flood Advisory	DLH	Ashland, Bayfield, Douglas, Iron, Price, Sawyer and 1 more	6 hr
Aug 26, 4:14 AM CDT	Special Weather Statement	DLH	Price, Sawyer, Washburn	61 min
Aug 26, 4:49 AM CDT	Areal Flood Advisory	DLH	Price, Sawyer, Washburn	4 hr
Aug 26, 6:04 AM CDT	Special Weather Statement	DLH	Burnett, Price, Sawyer, Washburn	56 min
Aug 26, 11:02 AM CDT	Flash Flood Watch	DLH	Price, Sawyer, Washburn	20 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2013 Every severe thunderstorm warning in 2013

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.