Alert archive / Wisconsin / Lake Effect Snow Warnings in 2011

Lake Effect Snow Warning 1, NWS Duluth, MN

January 6, 2011Ashland County, Bayfield County, Iron County, Wisconsin

NWS Duluth, MN issued this lake effect snow warning at Jan 6, 2011, 3:24 PM CST for Ashland County, Bayfield County, Iron County, Wisconsin. It was in force for 42 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 6, 2011, 3:24 PM CST (21:24 UTC)
Expired
Jan 8, 2011, 9:50 AM CST
In force
42 hr
Issued by
NWS Duluth, MN

Counties Ashland County, WI, Bayfield County, WI, Iron County, WI

The radar

The Duluth radar (KDLH), 120 km from the middle of the area, began a volume at 21:30 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 12:00Z, 9.4 hours before the alert went out and 302 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 2011-01-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-01-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
735 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
159 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 lake effect snow 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 lake effect snow warning went out at Jan 6, 3:03 PM CST, 21 minutes earlier.

Area forecast discussion, Jan 6, 3:03 PM CST, 21 minutes before
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Hazardous weather outlook, Jan 6, 4:04 AM CST, 11 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
404 AM CST THU JAN 6 2011

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-071130-
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-
404 AM CST THU JAN 6 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MINNESOTA AND
NORTHWESTERN WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

SNOW SHOWERS WILL CONTINUE ALONG THE SOUTH SHORE...MAINLY FROM
EASTERN ASHLAND COUNTY EAST ACROSS IRON COUNTY TODAY. A LAKE
EFFECT SNOW ADVISORY HAS BEEN ISSUED FOR THIS AREA. SEE THE LATEST
FORECAST AND WINTER WEATHER MESSAGE FOR FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SIGNIFICANT LAKE EFFECT SNOW SHOWERS...WITH THE POTENTIAL FOR
HEAVY SNOW...IS EXPECTED IN THE SNOWBELT FROM BAYFIELD COUNTY
THROUGH ASHLAND AND IRON COUNTIES THROUGH AT LEAST THE FIRST HALF
OF THE WEEKEND. A LAKE EFFECT SNOW WATCH HAS BEEN ISSUED. SEE THE
LATEST FORECAST AND WINTER WEATHER MESSAGE FOR FURTHER DETAILS.

WIND CHILLS IN THE 20 TO 30 BELOW RANGE ARE LIKELY EACH NIGHT FOR
THE REST OF THE WEEK....ESPECIALLY FROM THE TWIN PORTS NORTH TO
THE CANADIAN BORDER. WIND CHILL ADVISORIES MAY HAVE TO BE ISSUED.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

LSZ121-140>148-071130-
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-
404 AM CST THU JAN 6 2011

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

.DAY ONE...TODAY AND TONIGHT

A SMALL CRAFT ADVISORY IS IN EFFECT FOR MOST OF THE WISCONSIN
NEARSHORE WATERS. SEE THE LATEST MARINE FORECAST FOR DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A SMALL CRAFT ADVISORY AND A HEAVY FREEZING SPRAY WATCH ARE IN
EFFECT FOR MOST OF THE WISCONSIN NEARSHORE WATERS FRIDAY AND
FRIDAY NIGHT. SEE THE LATEST MARINE FORECAST FOR DETAILS.

04

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, Jan 6, 1:33 PM CST, 1 hour 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
133 PM CST THU JAN 06 2011

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

0131 PM     SNOW             GILE                    46.43N 90.23W
01/06/2011  M1.5 INCH        IRON               WI   TRAINED SPOTTER

            SNOWFALL SINCE 10 AM THIS MORNING.

&&

KK

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 5, 8:56 PM CSTSmall Craft AdvisoryDLH60 hr
Jan 6, 3:59 AM CSTHeavy Freezing Spray WatchDLH24 hr
Jan 6, 1:39 PM CSTWind Chill AdvisoryDLHAitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 4 more19 hr
Jan 5, 6:49 PM CSTLake Effect Snow AdvisoryDLHAshland, Iron21 hr

Nearby

Lake Effect Snow Warnings in Wisconsin, 2011Every lake effect snow warning in 2011

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.