Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 73, NWS Duluth, MN

July 30, 2014Sawyer County, Washburn County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at Jul 30, 2014, 3:37 PM CDT for Sawyer County, Washburn County, Wisconsin. It was in force for 38 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: Jul 30, 2014, 3:37 PM CDT (20:37 UTC)
Expired: Jul 30, 2014, 4:15 PM CDT
In force: 38 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 120 km from the middle of the area, began a volume at 20:37 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.6 hours before the alert went out and 307 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 859 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 60 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 Jul 30, 2:44 PM CDT, 53 minutes earlier.

Area forecast discussion, Jul 30, 2:44 PM CDT, 53 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
244 PM CDT WED JUL 30 2014

.SHORT TERM...(THIS EVENING THROUGH THURSDAY)
ISSUED AT 245 PM CDT WED JUL 30 2014

THE UNSTABLE NORTHWEST FLOW AND STEEP LAPSE RATES HAVE ALLOWED FOR
ANOTHER AFTERNOON OF SCATTERED SHOWERS...AND A FEW THUNDERSTORMS.
THE CONVECTION WILL CONTINUE THROUGH THE EARLY EVENING...THEN
DIMINISH THROUGH SUNSET WITH THE LOSS OF DIURNAL HEATING. WITH CAPE
VALUES AROUND 1000 J/KG...AND RELATIVELY LOW FREEZING
LEVELS...SOME HAIL IS EXPECTED WITH THE STRONGER STORMS THIS
AFTERNOON. THE MAIN THREAT FOR STRONG TO POSSIBLY A LOW-END SEVERE
STORM WILL BE OVER THE MN ARROWHEAD AND NRN WISCONSIN ZONES WHERE
0-6 KM SHEAR IS MOST FAVORABLE.

.LONG TERM...(THURSDAY NIGHT THROUGH WEDNESDAY)
ISSUED AT 245 PM CDT WED JUL 30 2014

THE EXTENDED PERIOD WILL FEATURE SIGNIFICANT UNCERTAINTY BEGINNING
SUNDAY. THE GFS AND ECMWF CONTINUE TO OFFER DIFFERENT SOLUTIONS FROM
SUNDAY THROUGH WEDNESDAY REGARDING A FRONTAL BOUNDARY AND WHERE IT
HANGS UP.

AN UPPER LEVEL LOW OVER/NEAR JAMES BAY THURSDAY NIGHT WILL MOVE
NORTHEAST LATE IN THE WEEK INTO THE WEEKEND. A WEAK SURFACE LOW WILL
BE OVER THE NORTHLAND THURSDAY NIGHT/FRIDAY...THEN IS FORECAST TO
WEAKEN. WE EXPECT SOME SHOWERS/STORMS TO DEVELOP ONCE AGAIN FRIDAY
AFTERNOON OVER PORTIONS OF THE NORTHLAND...WITH SOUTHERN AREAS
SEEING THE HIGHEST PROBABILITY. THE PRECIP WILL END FRIDAY NIGHT AND
MUCH OF THE REGION WILL REMAIN DRY INTO SATURDAY. A FRONTAL BOUNDARY
WILL THEN MOVE INTO NORTHWEST MINNESOTA SATURDAY AFTERNOON BRINGING
A CHANCE FOR SHOWERS/STORMS TO WESTERN PORTIONS OF THE CWA.

THE MODELS DIVERGE IN HOW FAR SOUTH THEY BRING THIS BOUNDARY...WITH
THE ECMWF CONSISTENTLY FURTHER SOUTH THAN THE GFS. THIS WILL HAVE A
BIG IMPACT ON THE REGIONS WEATHER AS INSTABILITY AND LIFT WILL BE
SIGNIFICANT ALONG THE FRONT. THE MODELS ARE INDICATING HEAVY RAIN AS
SEVERAL ROUNDS OF THUNDERSTORMS WILL OCCUR LATE IN THE WEEKEND INTO
THE MIDDLE OF NEXT WEEK ALONG THIS BOUNDARY. AT THIS TIME WE HAVE
SOME POPS FOR THE SUNDAY-WEDNESDAY PERIOD ACROSS MUCH OF THE
CWA...WITH HIGHEST CHANCES MOST TIMES OVER SOUTHERN AREAS CLOSER TO
THE BOUNDARY. THE PERIOD BEARS CLOSE MONITORING AS HEAVY RAIN/SEVERE
WEATHER WILL BE ASSOCIATED WITH THIS BOUNDARY. IF THE ECMWF IS
CORRECT MUCH OF THE STRONGER STORMS WILL REMAIN SOUTH OF OUR
CWA...AND THE GFS SOLUTION PUTS OUR CWA IN THE CROSSHAIRS.

EXPECT HIGH TEMPERATURES FROM THE MID SEVENTIES TO LOWER EIGHTIES
FOR MOST AREAS. THE WARMEST TEMPERATURES SHOULD OCCUR SATURDAY
BEFORE THE FRONTAL BOUNDARY MOVES IN.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z THURSDAY AFTERNOON)
ISSUED AT 1237 PM CDT WED JUL 30 2014

SCATTERED SHOWERS/STORMS WILL DEVELOP THIS AFTERNOON ACROSS
CENTRAL AND EASTERN PORTIONS OF THE NORTHLAND. THE STRONGER STORMS
WILL PRODUCE A BRIEF PERIOD OF MVFR OR POSSIBLY IFR CONDITIONS.

THE SHOWERS/STORMS WILL END LATER THIS EVENING AND SKIES WILL
BECOME CLEAR TO PARTLY CLOUDY. SOME FOG WILL ONCE AGAIN BE
POSSIBLE LATER TONIGHT AS WINDS GO LIGHT.

&&

.PRELIMINARY POINT TEMPS/POPS...
DLH  51  79  56  77 /  30  20  10  20
INL  49  79  52  79 /  10  20  10  10
BRD  54  82  57  81 /  10  20  10  30
HYR  50  81  54  79 /  40  30  20  50
ASX  48  74  53  74 /  40  20  10  30

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
MN...NONE.
WI...NONE.
LS...NONE.
&&

SHORT TERM...GRANING
LONG TERM...MELDE
AVIATION...MELDE

Hazardous weather outlook, Jul 30, 12:45 PM CDT, 2 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DULUTH MN
1245 PM CDT WED JUL 30 2014

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-311745-
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-
1245 PM CDT WED JUL 30 2014

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL TRACK SOUTH ACROSS MUCH OF THE
NORTHLAND THIS AFTERNOON...INTO EARLY EVENING. A FEW STORMS WILL
HAVE THE POTENTIAL TO PRODUCE SMALL HAIL AND GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A FEW THUNDERSTORMS ARE POSSIBLE AGAIN THURSDAY...AND LATER IN THE
WEEKEND.

.SPOTTER INFORMATION STATEMENT...

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

LSZ121-140>148-311745-
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-
1245 PM CDT WED JUL 30 2014

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A FEW THUNDERSTORMS WILL TRACK ACROSS PORTIONS OF WESTERN LAKE
SUPERIOR THIS AFTERNOON...INTO EARLY EVENING. A FEW STORMS WILL
HAVE THE POTENTIAL TO PRODUCE SMALL HAIL AND GUSTY WINDS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A FEW THUNDERSTORMS ARE POSSIBLE AGAIN THURSDAY...AND LATER IN
THE WEEKEND.

GRANING

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, Jul 30, 2:10 PM CDT, 1 hour 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
210 PM CDT WED JUL 30 2014

MNZ012-021-301945-
NORTHERN COOK/NORTHERN LAKE-SOUTHERN COOK/NORTH SHORE-
210 PM CDT WED JUL 30 2014

...STRONG STORM APPROACHING LUTSEN AREA...

AT 205 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 20 MILES NORTHWEST OF LUTSEN...MOVING
SOUTHEAST AT 25 MPH.

THIS STORM IS CAPABLE OF PRODUCING SMALL HAIL...WIND GUSTS TO 40
MPH...AND HEAVY DOWNPOURS...

* THE THUNDERSTORM WILL BE NEAR...
  FOUR MILE LAKE AROUND 230 PM...
  WHITE PINE LAKE AROUND 240 PM...
  NORTH SHORE OF LAKE SUPERIOR NEAR LUTSEN AROUND 300 PM

DO NOT BE CAUGHT ON A LAKE IN A THUNDERSTORM. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. BE ALERT
FOR FALLING TREES.

LAT...LON 4766 9064 4751 9093 4789 9110 4793 9100

GRANING

Special weather statement, Jul 30, 2:21 PM CDT, 1 hour 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
221 PM CDT WED JUL 30 2014

WIZ001-002-007-008-302000-
BAYFIELD-DOUGLAS-SAWYER-WASHBURN-
221 PM CDT WED JUL 30 2014

...DEVELOPING THUNDERSTORM APPROACHING HAYWARD...

AT 216 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
DEVELOPING THUNDERSTORM 15 MILES NORTHWEST OF HAYWARD...MOVING
SOUTHEAST AT 20 MPH.

EXPECT GUSTY WINDS...LIGHTNING...HEAVY DOWNPOURS...AND POSSIBLY
SMALL HAIL.

* THE THUNDERSTORM WILL REACH THE CITY OF HAYWARD AROUND 300 PM...

DO NOT BE CAUGHT ON A LAKE IN A THUNDERSTORM. IF YOU CAN HEAR
THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. BE ALERT
FOR FALLING TREES.

LAT...LON 4601 9124 4589 9155 4621 9169 4626 9159

GRANING

Special weather statement, Jul 30, 2:22 PM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
222 PM CDT WED JUL 30 2014

MNZ011-012-019-301945-
CENTRAL ST. LOUIS-NORTH ST. LOUIS-NORTHERN COOK/NORTHERN LAKE-
222 PM CDT WED JUL 30 2014

...STRONG THUNDERSTORM IN NORTHEAST ST. LOUIS COUNTY...

AT 218 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR LAKE AGNES...MOVING SOUTH AT 30 MPH.

THIS STORM IS CAPABLE OF PRODUCING PEA SIZE HAIL...WIND GUSTS UP TO
30 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...

LOCATIONS IMPACTED INCLUDE...
  BIG MOOSE LAKE...     BIG LAKE...           CUMMINGS LAKE...
  SHAGAWA LAKE...       HIGH LAKE...          BURNTSIDE LAKE...
  WINTON...             ELY...

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 4826 9198 4826 9195 4791 9166 4780 9205
      4821 9221 4827 9199

STEWART

Special weather statement, Jul 30, 2:27 PM CDT, 1 hour 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
227 PM CDT WED JUL 30 2014

WIZ001-302000-
DOUGLAS-
227 PM CDT WED JUL 30 2014

...STRONG THUNDERSTORM IN DOUGLAS COUNTY...

AT 226 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR SOUTH RANGE...MOVING SOUTH AT 30 MPH.

THIS STORM IS CAPABLE OF PRODUCING PEA SIZE HAIL...WIND GUSTS UP TO
30 MPH...OCCASIONAL CLOUD TO GROUND LIGHTNING...BRIEF MODERATE
DOWNPOURS...

LOCATIONS IMPACTED INCLUDE...
  HAWTHORNE...          BENNETT...            SOLON SPRINGS...

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 4626 9196 4666 9215 4670 9197 4670 9192
      4669 9189 4634 9166

STEWART

Special weather statement, Jul 30, 3:03 PM CDT, 34 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
303 PM CDT WED JUL 30 2014

WIZ001-002-007-008-302045-
BAYFIELD-DOUGLAS-SAWYER-WASHBURN-
303 PM CDT WED JUL 30 2014

AT 300 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR TOTAGATIC FLOWAGE...MOVING SOUTHEAST AT 40
MPH.

THIS STORM IS CAPABLE OF PRODUCING HALF INCH DIAMETER HAIL...WIND
GUSTS UP TO 30 MPH...BRIEF MODERATE DOWNPOURS...

LOCATIONS IMPACTED INCLUDE...
  HAYWARD...            LITTLE ROUND LAKE...  STONE LAKE...
  NORTHWOODS BEACH...   CHIEF LAKE...         RESERVE...
  COUDERAY...           RADISSON...           OJIBWA...
  EXELAND...

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 4606 9170 4622 9149 4570 9104 4563 9127
      4563 9140

STEWART

Local storm report, Jul 30, 3:36 PM CDT, 1 minute 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
Jul 29, 7:29 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Saint Louis	31 min
Jul 29, 7:46 PM CDT	Special Weather Statement	DLH	Saint Louis	29 min
Jul 29, 8:14 PM CDT	Special Weather Statement	DLH	Carlton	31 min
Jul 30, 1:24 PM CDT	Special Weather Statement	DLH		21 min
Jul 30, 1:39 PM CDT	Special Weather Statement	DLH	Cook	36 min
Jul 30, 2:10 PM CDT	Special Weather Statement	DLH	Cook	35 min
Jul 30, 2:22 PM CDT	Special Weather Statement	DLH		23 min
Jul 29, 7:26 PM CDT	Special Weather Statement	DLH	Douglas	34 min
Jul 30, 2:21 PM CDT	Special Weather Statement	DLH	Washburn	39 min
Jul 30, 2:27 PM CDT	Special Weather Statement	DLH	Douglas	33 min
Jul 30, 2:54 PM CDT	Severe Thunderstorm Warning	DLH	Douglas, Washburn	51 min
Jul 30, 3:03 PM CDT	Special Weather Statement	DLH	Sawyer	42 min
Jul 30, 3:34 PM CDT	Severe Thunderstorm Warning	DLH	Douglas, Washburn	41 min
Jul 30, 4:12 PM CDT	Severe Thunderstorm Warning	DLH	Washburn	55 min
Jul 30, 4:14 PM CDT	Severe Thunderstorm Warning	DLH	Sawyer, Washburn	46 min
Jul 30, 4:30 PM CDT	Special Weather Statement	DLH	Ashland	30 min
Jul 30, 4:38 PM CDT	Special Weather Statement	DLH	Bayfield	22 min
Jul 30, 5:03 PM CDT	Special Weather Statement	DLH	Ashland	42 min
Jul 30, 5:11 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Iron	34 min
Jul 30, 5:14 PM CDT	Special Weather Statement	DLH	Bayfield	16 min
Jul 30, 5:35 PM CDT	Special Weather Statement	DLH	Bayfield	25 min
Jul 30, 5:44 PM CDT	Special Weather Statement	DLH	Iron	46 min
Jul 30, 6:00 PM CDT	Special Weather Statement	DLH	Sawyer	30 min
Jul 30, 6:25 PM CDT	Special Weather Statement	DLH	Sawyer	35 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2014 Every severe thunderstorm warning in 2014

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.