Alert archive / Minnesota / Tornado Warnings in 2013

Tornado Warning 11, NWS Duluth, MN

August 29, 2013Aitkin County, Cass County, Minnesota

NWS Duluth, MN issued this tornado warning at Aug 29, 2013, 6:57 PM CDT for Aitkin County, Cass County, Minnesota. It was in force for 33 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 29, 2013, 6:57 PM CDT (23:57 UTC)
Expired
Aug 29, 2013, 7:30 PM CDT
In force
33 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Tornado
Observed
Hail
1.75 in

Counties Aitkin County, MN, Cass County, MN

The radar

The Duluth radar (KDLH), 127 km from the middle of the area, began a volume at 23:58 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.

IssuedProductOfficeLasted
Aug 29, 5:46 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 12.0 hours before the alert went out and 204 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 2013-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 400 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 2013-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
400 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1263 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
38 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 tornado 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 tornado warning went out at Aug 29, 6:49 PM CDT, 8 minutes earlier.

Area forecast discussion, Aug 29, 6:49 PM CDT, 8 minutes before
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Hazardous weather outlook, Aug 29, 4:05 PM CDT, 2 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
405 PM CDT THU AUG 29 2013

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-301130-
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-
405 PM CDT THU AUG 29 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE
NORTHLAND TONIGHT...MAINLY SOUTH OF THE HIGHWAY 2 CORRIDOR.
THERE IS A CHANCE OF LARGE HAIL...DAMAGING WINDS AND
TORNADOES.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A CHANCE OF THUNDERSTORMS FROM FRIDAY THROUGH SATURDAY
NIGHT.

.SPOTTER INFORMATION STATEMENT...

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

LSZ121-140>148-301130-
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-
405 PM CDT THU AUG 29 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS ARE POSSIBLE ACROSS WESTERN LAKE SUPERIOR TONIGHT.
THE STORMS ARE NOT EXPECTED TO BE SEVERE...BUT A FEW STRONGER
STORMS WILL BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A STRONG COLD FRONT COULD BRING THUNDERSTORMS TO THE NEARSHORE
WATERS OF LAKE SUPERIOR LATE SATURDAY AFTERNOON AND SATURDAY
NIGHT.

DAP

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 29, 4:46 PM CDT, 2 hours 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
446 PM CDT THU AUG 29 2013

MNZ036>038-WIZ001-292230-
CARLTON/SOUTH ST. LOUIS-DOUGLAS-PINE-SOUTH AITKIN-
446 PM CDT THU AUG 29 2013

...STRONG STORM OVER PINE COUNTY...

AT 447 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR DENHAM...MOVING EAST AT 35 MPH.

THIS STORM IS CAPABLE OF PRODUCING UP TO NICKEL SIZE HAIL...WIND
GUSTS UP TO 40 MPH...BRIEF HEAVY DOWNPOURS...

* THE THUNDERSTORM WILL BE NEAR...
  WILLOW RIVER BY 455 PM...
  MOOSE LAKE STATE PARK BY 500 PM...
  BRUNO AND BARNUM BY 505 PM...
  NEMADJI BY 510 PM...
  DUQUETTE AND KERRICK BY 515 PM...
  NICKERSON BY 520 PM...
  HOLYOKE BY 525 PM...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

LAT...LON 4651 9218 4618 9222 4628 9311 4650 9311

DAP
Special weather statement, Aug 29, 5:53 PM CDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
553 PM CDT THU AUG 29 2013

MNZ038-WIZ001-006-007-292315-
BURNETT-DOUGLAS-PINE-WASHBURN-
553 PM CDT THU AUG 29 2013

...THUNDERSTORMS MOVING ACROSS NORTHWEST WISCONSIN...

AT 548 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS NEAR WEBB LAKE...MOVING EAST AT 15
MPH.

THESE STORMS ARE CAPABLE OF PRODUCING PEA SIZE HAIL...WIND GUSTS UP
TO 30 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...AND BRIEF HEAVY
DOWNPOURS...

LOCATIONS IMPACTED INCLUDE...
  MINONG FLOWAGE...     TREGO...              MINONG...
  LAMPSON...            DANBURY...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4645 9164 4614 9155 4577 9156 4587 9274
      4610 9273

LE
Local storm report, Aug 29, 6:07 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
607 PM CDT THU AUG 29 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0606 PM     HAIL             1 N BOY LAKE            47.12N 94.15W
08/29/2013  M1.00 INCH       CASS               MN   TRAINED SPOTTER

&&

KK
Local storm report, Aug 29, 6:41 PM CDT, 16 minutes before
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Local storm report, Aug 29, 6:45 PM CDT, 12 minutes before
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Local storm report, Aug 29, 6:48 PM CDT, 9 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 7:29 PM CDTSpecial Weather StatementDLHKoochiching16 min
Aug 28, 7:43 PM CDTSpecial Weather StatementDLHSaint Louis32 min
Aug 28, 8:16 PM CDTSpecial Weather StatementDLHSaint Louis29 min
Aug 28, 8:45 PM CDTSpecial Weather StatementDLH30 min
Aug 28, 9:18 PM CDTSpecial Weather StatementDLHSaint Louis27 min
Aug 28, 9:46 PM CDTSpecial Weather StatementDLHSaint Louis29 min
Aug 28, 10:16 PM CDTSpecial Weather StatementDLHSaint Louis44 min
Aug 28, 10:47 PM CDTSpecial Weather StatementDLHSaint Louis28 min
Aug 29, 8:54 AM CDTSpecial Weather StatementDLHCass21 min
Aug 29, 9:20 AM CDTSpecial Weather StatementDLHKoochiching20 min
Aug 29, 9:50 AM CDTSpecial Weather StatementDLHCass25 min
Aug 29, 9:51 AM CDTSpecial Weather StatementDLHKoochiching24 min
Aug 29, 10:16 AM CDTSpecial Weather StatementDLHCass14 min
Aug 29, 10:25 AM CDTSpecial Weather StatementDLHSaint Louis35 min
Aug 29, 10:26 AM CDTSpecial Weather StatementDLHKoochiching34 min
Aug 29, 10:49 AM CDTSpecial Weather StatementDLHCass, Itasca11 min
Aug 29, 11:08 AM CDTSpecial Weather StatementDLHItasca22 min
Aug 29, 11:13 AM CDTSpecial Weather StatementDLH32 min
Aug 29, 11:40 AM CDTSpecial Weather StatementDLHSaint Louis20 min
Aug 29, 12:02 PM CDTSpecial Weather StatementDLHLake28 min
Aug 29, 12:06 PM CDTSpecial Weather StatementDLHSaint Louis24 min
Aug 29, 12:32 PM CDTSpecial Weather StatementDLHLake28 min
Aug 29, 12:33 PM CDTSpecial Weather StatementDLHLake17 min
Aug 29, 12:43 PM CDTSpecial Marine WarningDLH62 min
Aug 29, 12:55 PM CDTSpecial Weather StatementDLH20 min
Aug 29, 1:54 PM CDTSpecial Marine WarningDLH66 min
Aug 29, 4:45 PM CDTSpecial Weather StatementDLHCass45 min
Aug 29, 4:46 PM CDTSpecial Weather StatementDLHPine44 min
Aug 29, 5:04 PM CDTSevere Thunderstorm WarningDLHCass, Itasca41 min
Aug 29, 5:22 PM CDTTornado WarningDLHCass23 min
Aug 29, 5:43 PM CDTSevere Thunderstorm WarningDLHCass, Itasca47 min
Aug 29, 6:30 PM CDTTornado WarningDLHAitkin, Cass, Itasca30 min
Aug 29, 1:12 PM CDTSpecial Weather StatementDLHBayfield18 min
Aug 29, 1:35 PM CDTSpecial Weather StatementDLHBayfield25 min
Aug 29, 1:59 PM CDTSpecial Weather StatementDLHAshland, Bayfield21 min
Aug 29, 2:27 PM CDTSpecial Weather StatementDLHAshland, Iron23 min
Aug 29, 2:54 PM CDTSpecial Weather StatementDLHIron21 min
Aug 29, 3:22 PM CDTSpecial Weather StatementDLHIron23 min
Aug 29, 3:46 PM CDTSpecial Weather StatementDLHPrice14 min
Aug 29, 4:10 PM CDTSpecial Weather StatementDLHPrice35 min
Aug 29, 4:42 PM CDTSpecial Weather StatementDLHPrice18 min
Aug 29, 5:53 PM CDTSpecial Weather StatementDLHBurnett, Washburn22 min
Aug 29, 6:21 PM CDTSevere Thunderstorm WarningDLHSawyer, Washburn39 min

Nearby

Tornado Warnings in Minnesota, 2013Every tornado warning in 2013Tornadoes 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.