Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 65, NWS Duluth, MN

June 21, 2006Ashland County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Jun 21, 2006, 1:55 PM CDT for Ashland County, Wisconsin. It was in force for 35 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
Jun 21, 2006, 1:55 PM CDT (18:55 UTC)
Expired
Jun 21, 2006, 2:30 PM CDT
In force
35 min
Issued by
NWS Duluth, MN
Area
Counties, with a storm outline in the text

County Ashland County, WI

The radar

The Duluth radar (KDLH), 119 km from the middle of the area, began a volume at 18:56 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
Jun 21, 1:28 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 6.9 hours before the alert went out and 300 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 2006-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 47 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 2006-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939587897117Sfc1 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
47 J/kg
Mixed-layer CIN
-147 J/kg
Mixed-layer LCL
1480 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
184 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 Jun 21, 11:08 AM CDT, 2 hours 47 minutes earlier.

Area forecast discussion, Jun 21, 11:08 AM CDT, 2 hours 47 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
1108 AM CDT WED JUN 21 2006

.UPDATE...QUICK UPDATE TO REFLECT CURRENT RADAR TRENDS. STRONG
CONVECTION HAS DEVELOPED ALONG THE SURFACE TROUGH LATE THIS
MORNING. EXPECT STRONG STORMS TO CONTINUE THROUGH THIS AFTERNOON
ALONG AND AHEAD OF THE SURFACE BOUNDARY. WILL CONTINUE TO MONITOR
FOR POTENTIAL SEVERE CRITERIA.

&&

.PREV DISCUSSION... (ISSUED 318 AM CDT WED JUN 21 2006)

DISCUSSION...
TROF ASSOCIATED WITH CANADIAN UPPER LOW WILL CONT TO AFFECT THE
NORTHLAND TODAY AND TNT.

SERIES OF EMBEDDED S/WV EMBEDDED IN THE TROF WILL MOVE THRU NEXT
24HRS.NEXT ONE TO BRING ISOLATED STORMS TO REGION EVIDENT ON
WATER VAPOR FROM OVR LK WINNIPEG THOURGH NORTH DAKOTA...WITH SFC
TROF JUST ENTERING NWRN MN. ISOLATED SHOWERS POPPING UP JUST AHEAD
OF THE TROF IN CONVERGENCE AREA. THIS TROF WILL MOVE QUICKLY
ACROSS THE NORTHLAND TODAY. ANOTHER AREA OF SFC CONVERGENCE ACROSS
NWRN WI IN SRN TIER OF CWA WHICH COULD BE THE FOCUS FOR TSTM
DEVELOPMENT THIS MORNING. RATHER BROADBRUSHED THE PRECIP AREA FOR
THE NORTHLAND TODAY SINCE WE HAVE POSSIBILITY OF ELEVATED STORMS
ALMOST ANYWEHRE/ANYTIME TODAY. UPPER JET SITUATED PRACTICALLY
OVERHEAD...AIDING IN LOLVL CONVERGENCE...AND ANY DAY-TIME HEATING
COULD SET OFF TSTMS IN AN UNSTABLE ATMOS OF -2 TO -6 LIS. BEST
CAPES WILL BE IN NWRN WI. SEE SWODY1 FROM SPC TO SEE DISCUSSION
FOR SLIGHT RISK SVR THREAT IN NWRN WI.

CANADIAN COLD FRONT COMING THROUGH NE MN THIS EVENING...THEN THRU
NWRN WI OVERNIGHT. AGAIN...SUPPORT FRM S/WV WL KEEP THREAT OF
TSTMS GOING. THIS S/WV EXITS THE CWA THURSDAY MORNING. MAY SEE
SOME LINGERING SHOWERS ACROSS SRN CWA WITH THE COLD FROPA.

EXPECT A BREEZY DAY TODAY WITH WINDS THROUGH 850 MB OF 25 TO 35
KTS MIXING DOWN.

THERE ARE SOME TIMING DIFFERENCES IN THE MODELS, BUT GENERAL
PATTERN IN AGREEMENT.

&&

.DLH WATCHES/WARNINGS/ADVISORIES...

MN...NONE.
WI...NONE.
LS...NONE.

LILES/CLC
Hazardous weather outlook, Jun 21, 11:16 AM CDT, 2 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE DULUTH MN
1116 AM CDT WED JUN 21 2006

LSZ121-140>148-162-MNZ010>012-018>021-025-026-033>038-WIZ001>004-
006>009-221245-
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-
OPEN WATERS OF LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI
TO GRAND PORTAGE MN-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-
1116 AM CDT WED JUN 21 2006

...SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND THIS EVENING
ACROSS PORTIONS OF THE NORTHLAND...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A FEW SEVERE STORMS ARE POSSIBLE TODAY AND THIS EVENING OVER THE
ARROWHEAD REGION OF NORTHEAST MINNESOTA. THERE IS ALSO A SLIGHT
RISK OF SEVERE THUNDERSTORMS OVER NORTHWESTERN WISCONSIN AND
WESTERN LAKE SUPERIOR THIS AFTERNOON AND EVENING. THE GREATEST
THREAT WILL BE DAMAGING WINDS. ISOLATED THUNDERSTORMS ARE EXPECTED
ELSEWHERE ACROSS THE NORTHLAND TODAY AND TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SPOTTY THUNDERSTORMS ARE POSSIBLE THROUGH THE WEEKEND AND ON
MONDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED TODAY AND THIS EVENING.

LILES

In the hours before

Local storm report, Jun 21, 1:03 PM CDT, 52 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 10:34 AM CDTSevere Thunderstorm WarningDLHSaint Louis26 min
Jun 21, 10:43 AM CDTSevere Thunderstorm WarningDLHLake47 min
Jun 21, 11:22 AM CDTSevere Thunderstorm WarningDLHLake38 min
Jun 21, 11:41 AM CDTSevere Thunderstorm WarningDLHCook64 min
Jun 21, 11:53 AM CDTSpecial Marine WarningDLH2 hr
Jun 21, 11:53 AM CDTTornado WarningDLHLake37 min
Jun 21, 12:11 PM CDTSevere Thunderstorm WarningDLHLake39 min
Jun 21, 1:13 PM CDTSevere Thunderstorm WarningDLHCook32 min
Jun 21, 1:28 PM CDTSpecial Marine WarningDLH35 min
Jun 21, 1:29 PM CDTSevere Thunderstorm WarningDLHAshland, Bayfield31 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2006Every severe thunderstorm warning in 2006

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.