Alert archive / Minnesota / Special Weather Statements in 2012

Special Weather Statement, NWS Duluth, MN

June 20, 2012Cass County, Minnesota

NWS Duluth, MN issued this special weather statement at Jun 20, 2012, 11:39 PM CDT for Cass County, Minnesota. It was in force for 36 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: Jun 20, 2012, 11:39 PM CDT (04:39 UTC)
Expired: Jun 21, 2012, 12:15 AM CDT
In force: 36 min
Issued by: NWS Duluth, MN

County Cass County, MN

The radar

The Duluth radar (KDLH), 167 km from the middle of the area, began a volume at 04:40 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 00:00Z, 4.7 hours before the alert went out and 200 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: 148 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 474 m above ground
0-6 km bulk shear: 93 kt
0-1 km storm-relative helicity: -78 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Jun 20, 8:11 PM CDT, 3 hours 28 minutes earlier.

Area forecast discussion, Jun 20, 8:11 PM CDT, 3 hours 28 minutes before

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Hazardous weather outlook, Jun 20, 3:34 PM CDT, 8 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
334 PM CDT WED JUN 20 2012

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-211030-
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-
334 PM CDT WED JUN 20 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

RECORD FLOODING CONTINUES ACROSS PORTIONS OF THE NORTHLAND...WITH
THE TWIN PORTS REGION ONE OF THE HARDEST HIT...ALONG WITH
PORTIONS OF THE NORTH SHORE OF LAKE SUPERIOR. NUMEROUS ROADS HAVE
BEEN CLOSED IN THE TWIN PORTS REGION. SEVERAL RIVERS WERE
EXPECTED TO CREST NEAR ALL TIME RECORD LEVELS. MANY FLOOD WARNINGS
AND STATEMENTS HAVE BEEN ISSUED...SO SEE THEM FOR FURTHER DETAILS.
SHOWERS AND STORMS WERE REDEVELOPING THIS AFTERNOON...AND WILL
IMPACT FAR EASTERN MINNESOTA AND NORTHWEST WISCONSIN. THE HEAVIEST
RAIN WILL OCCUR OVER NORTHWEST WISCONSIN...WHERE LOCALLY 1-2
INCHES IS POSSIBLE THROUGH THE EVENING.

IN ADDITION TO THE FLOODING AND HEAVY RAIN POTENTIAL...IS THE RISK
FOR SEVERE STORMS THIS AFTERNOON AND EARLY EVENING OVER MUCH OF
NORTHWEST WISCONSIN. THE MAIN THREATS ARE DAMAGING WIND AND LARGE
HAIL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

FLOODING WILL CONTINUE FOR SEVERAL DAYS.

THUNDERSTORMS ARE POSSIBLE OVER PORTIONS OF THE NORTHLAND AGAIN
THURSDAY THROUGH SATURDAY. COVERAGE AND STORM INTENSITY WILL BE
MUCH LOWER THAN WHAT OCCURRED TUESDAY INTO WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

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

LSZ121-140>148-211030-
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-
334 PM CDT WED JUN 20 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON AND TONIGHT...WITH
THEM MOST WIDESPREAD AND INTENSE ALONG THE SOUTH SHORE INTO THIS
EVENING. LARGE HAIL AND DAMAGING WINDS ARE THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS WILL BE POSSIBLE OVER PORTIONS OF WESTERN LAKE
SUPERIOR THURSDAY THROUGH SATURDAY.

MELDE

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, Jun 20, 6:18 PM CDT, 5 hours 21 minutes before

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Local storm report, Jun 20, 6:25 PM CDT, 5 hours 14 minutes before

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Local storm report, Jun 20, 6:32 PM CDT, 5 hours 7 minutes before

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Local storm report, Jun 20, 6:40 PM CDT, 4 hours 59 minutes before

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Special weather statement, Jun 20, 10:50 PM CDT, 49 minutes before

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Special weather statement, Jun 20, 11:39 PM CDT, 0 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
Jun 20, 10:39 PM CDT	Areal Flood Warning	DLH	Carlton, Saint Louis	36 hr
Jun 20, 10:50 PM CDT	Special Weather Statement	DLH	Koochiching	55 min
Jun 21, 1:33 AM CDT	Special Weather Statement	DLH	Crow Wing	27 min
Jun 21, 2:05 AM CDT	Special Weather Statement	DLH	Aitkin	25 min
Jun 21, 2:43 AM CDT	Special Weather Statement	DLH	Carlton, Pine	32 min
Jun 21, 3:20 AM CDT	Special Weather Statement	DLH	Carlton	25 min
Jun 21, 8:09 AM CDT	Areal Flood Warning	DLH	Carlton, Pine	6 days
Jun 21, 10:46 AM CDT	Areal Flood Warning	DLH	Ashland	24 hr

Nearby

Special Weather Statements in Minnesota, 2012 Every special weather statement in 2012

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.