Special Weather Statement, NWS Marquette, MI

Area Forecast Discussion
National Weather Service Marquette MI
548 AM EDT FRI JUL 8 2016

.SHORT TERM...(Today and tonight)
Issued at 521 AM EDT FRI JUL 8 2016

Deep upper low over northern MN with sfc low also over northern MN
heading ESE toward Upper Michigan. H5 12 hr height falls toward 80m
show deepening system. Lift ahead of the upper low and mid-level
drying/steepening lapse rates and advection of higher pwats into the
system has resulted in cluster of showers and thunderstorms crossing
Upper Michigan early this morning. Limited instability with MUCAPE
well under 1000j/kg is keeping storms in check thus far. Expect this
activity to quickly move over eastern cwa this morning. Already
seeing drying occuring over western U.P and that should cross central
and east through the morning.

By late morning though as the upper low moves overhead expect
showers and thunderstorms to redevelop with peak heating as temps
inland from Lk Superior work into the 70s and dwpnts stay in the 60s
which gives sfc based capes up to 1000j/kg, locally higher where mid
60s dwpnts can pool along track of sfc low crossing the area. Latest
HRRR runs indicate central and east will be in line for greatest
shower and thunderstorm coverage this aftn. Lowering freezing levels
will allow any stronger updraft and elevated cores to produce at
least small hail and mentioned this in grids and HWO. Despite lacking
deep layer shear less than 25 kts, given instability and steep lapse
rates/total totals over 50, there is marinal risk for pulsy storms
with severe hail to 1 inch diameter as 50 dbz height to get 1 inch
hail is less than 30 kft. This risk only becomes enhanced if we can
see some sunshine in wake of the morning showers/thunderstorms.

Late today as the sfc low moves east, winds shift to the north off
Lk Superior which should bring some fog over much of cwa this
evening. Fog may become dense near Lk Superior. Did not play up too
much as the fog still needs to form as based on all ship obs and
other sources it appears the fog is pretty patchy over Lk Superior
attm. Also the north winds will lead to choppy waters in the nsh
zones and help increase the swim risk for Lk Superior beaches for
Marquette county.

.LONG TERM...(Saturday through Thursday)
Issued at 449 AM EDT FRI JUL 8 2016

Expect dry weather over the weekend and probably into Mon under
ridging, then developing waa pattern downstream of the trof slowly
shifting e from the northern Rockies will bring periodic shra/tsra
chances again Tue/Wed and probably into Thu.

Beginning Sat, Dnva/deep layer q-vector divergence spreads in from
the w in the wake of vigorous shortwave departing to the e. Upslope
cyclonic northerly wind will allow for some lingering low clouds/fog
over the e early Sat but then should depart late Sat morning as high
pres ridge builds toward the area with continued drying from the n
and w. Despite increasing sunshine, the day will be on the cooler
side with breezy n winds off Lake Superior, especially central and
e. Expect 60s near the lake and low/mid 70s inland. It will be
coolest e where clouds and gusty n winds will be more persistent.
Winds on the backside of the departing low pres will also be strong
enough to build sufficient waves for a moderate swim risk on Lake
Superior Sat, especially for the beaches of Alger County.

With high pres ridge over the area Sat night, it will be a cool
night under clear skies and layer pcpn water values blo 0.7 inch.
Mins over the interior should slip down into the 40s with low/mid
40s not out of the question for traditional interior cold spots.

Sun/Sun night, 00z NCEP models continue to show the potential for
-shra as shortwave energy cuts thru what is an otherwise building
ridge. With the mid-upper ridge building and the ridge axis to the w
over MN, suspect drier non-NCEP guidance for Upper MI is on track
and both NCEP and non-NCEP ensembles both support drier solution.
Will maintain a dry fcst, but with some increase in mid clouds. Away
from lake breezes on Sun, high temps will rebound well into the
70s/around 80F.

With axis of sharpening mid/upper ridge over the Upper Great Lakes
on Mon, expect dry weather again to prevail. While temps will rise
back above normal, low/mid 80s for the most part, dewpoints, though
rising, should still be mostly in the comfortable range (upper 50s,
maybe low 60s far west).

Tue thru Thu, deep mid-upper trough over the central/northern
Rockies Mon will weaken as it shifts ene, reaching the Upper Great
Lakes Thu/Fri. Deep sw flow will advect warmer air/increasing
moisture into the area, and with shortwave energy likely to lift ne
ahead of advancing trof, some shra/tsra will occur at times Tue thru
Thu. For now, nothing more than mostly broad brushed chc pops are
warranted as convective details are typically highly uncertain out
to days 5-7 in forecast period. With 85H thermal ridge of 18-20c
temps lingering over area, it should be a very warm/humid period
with max temps well into the 80s for most locations and dewpoints
well into the 60s, making conditions more uncomfortable.
&&

.AVIATION...(For the 12Z TAFS through 12Z Saturday morning)
Issued at 543 AM EDT FRI JUL 8 2016

Scattered showers with a few thunderstorms early on. More showers and
thunderstorms expected during peak heating as strong upper low moves
overhead. Best chances for additional showers/storms will be at SAW.
MVFR conditions or even VFR but expect conditions to lower to LIFR at
CMX this morning and to IFR at SAW this morning. East winds to north
of low pressure will keep conditions low through the day at CMX but
could see improvement to MVFR at SAW. However, as the low moves east
of area this evening, north winds will bring lowering cigs and vsby
to LIFR/IFR again to SAW with moist upslope flow off Lk Superior.
Expect MVFR range conditions tonight at IWD and CMX.

&&

.MARINE...(For the 4 AM Lake Superior forecast issuance)
Issued at 521 AM EDT FRI JUL 8 2016

As a strong upper disturbance and accompanying surface low pres
track to the S of Lake Superior today and tonight, E winds 10-20 kts
will shift to the N up to 25 kts by this evening. Areas of fog will
expand as well. The arrival of hi pres following the exit of this
disturbance/lo pres over the weekend will result in diminishing
winds and fog dissipation.
&&

.MQT WATCHES/WARNINGS/ADVISORIES...
Upper Michigan...
None.
Lake Superior...
None.
Lake Michigan...
None.
&&

SHORT TERM...JLA
LONG TERM...Voss
AVIATION...JLA
MARINE...JLA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MARQUETTE MI
510 AM EDT FRI JUL 8 2016

MIZ001>004-007-009>014-084-085-091100-
KEWEENAW-ONTONAGON-NORTHERN HOUGHTON-BARAGA-LUCE-GOGEBIC-IRON-
DICKINSON-MENOMINEE-DELTA-SOUTHERN SCHOOLCRAFT-SOUTHERN HOUGHTON-
NORTHERN SCHOOLCRAFT-
510 AM EDT FRI JUL 8 2016 /410 AM CDT FRI JUL 8 2016/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN UPPER
MICHIGAN AND CENTRAL UPPER MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE TODAY INTO EARLY THIS EVENING. SOME STORMS
COULD CONTAIN SMALL HAIL.

LOCALLY DENSE FOG IS POSSIBLE NEAR LAKE SUPERIOR.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS ARE POSSIBLE AGAIN MONDAY NIGHT OVER FAR WESTERN UPPER
MICHIGAN AND THEN ACROSS THE AREA TUESDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS
TIME.

MIZ005-006-091100-
MARQUETTE-ALGER-
510 AM EDT FRI JUL 8 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL UPPER
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE TODAY INTO THIS EVENING. SOME STORMS COULD
CONTAIN SMALL HAIL.

THERE IS A MODERATE SWIM RISK OVER MARQUETTE COUNTY TODAY, AND A
HIGH SWIM RISK OVER MARQUETTE AND ALGER COUNTY ON SATURDAY.

LOCALLY DENSE FOG IS POSSIBLE NEAR LAKE SUPERIOR.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS ARE POSSIBLE LATE MONDAY NIGHT THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS
TIME.

LSZ162-240>251-263>267-091100-
LAKE SUPERIOR WEST OF A LINE FROM SAXON HARBOR WI TO GRAND
PORTAGE MN BEYOND 5NM-SAXON HARBOR WI TO BLACK RIVER MI-
BLACK RIVER TO ONTONAGON MI-
ONTONAGON TO UPPER ENTRANCE OF PORTAGE CANAL MI-
UPPER ENTRANCE OF PORTAGE CANAL TO EAGLE RIVER MI-
EAGLE RIVER TO MANITOU ISLAND MI-
MANITOU ISLAND TO POINT ISABELLE MI-
POINT ISABELLE TO LOWER ENTRANCE OF PORTAGE CANAL MI-
LOWER ENTRANCE OF PORTAGE CANAL TO HURON ISLANDS MI INCLUDING
KEWEENAW AND HURON BAYS-HURON ISLANDS TO MARQUETTE MI-
MARQUETTE TO MUNISING MI-MUNISING TO GRAND MARAIS MI-
GRAND MARAIS TO WHITEFISH POINT MI-
LAKE SUPERIOR FROM SAXON HARBOR WI TO UPPER ENTRANCE TO PORTAGE
CANAL MI 5NM OFF SHORE TO THE US/CANADIAN BORDER INCLUDING ISLE
ROYALE NATIONAL PARK-
LAKE SUPERIOR FROM UPPER ENTRANCE TO PORTAGE CANAL TO MANITOU
ISLAND MI 5NM OFF SHORE TO THE US/CANADIAN BORDER-
LAKE SUPERIOR WEST OF LINE FROM MANITOU ISLAND TO MARQUETTE MI
BEYOND 5NM FROM SHORE-
LAKE SUPERIOR EAST OF A LINE FROM MANITOU ISLAND TO MARQUETTE MI
AND WEST OF A LINE FROM GRAND MARAIS MI TO THE US/CANADIAN BORDER
BEYOND 5NM FROM SHORE-
LAKE SUPERIOR FROM GRAND MARAIS MI TO WHITEFISH POINT MI 5NM OFF
SHORE TO THE US/CANADIAN BORDER-
510 AM EDT FRI JUL 8 2016 /410 AM CDT FRI JUL 8 2016/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN LAKE
SUPERIOR...CENTRAL LAKE SUPERIOR AND WESTERN LAKE SUPERIOR.

.DAY ONE...TODAY AND TONIGHT

AREAS OF FOG MAY BE LOCALLY DENSE TODAY AND TONIGHT.

THUNDERSTORMS ARE POSSIBLE ACROSS MOST OF LAKE SUPERIOR TODAY. SOME
OF THE STORMS COULD CONTAIN SMALL HAIL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE IS A CHANCE OF THUNDERSTORMS OVER WESTERN LAKE SUPERIOR MONDAY
NIGHT AND THEN ACROSS LAKE SUPERIOR TUESDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS
TIME.

LMZ221-248-250-091100-
GREEN BAY NORTH OF LINE FROM CEDAR RIVER MI TO ROCK ISLAND
PASSAGE-SEUL CHOIX POINT TO POINT DETOUR MI-
5NM EAST OF A LINE FROM FAIRPORT MI TO ROCK ISLAND PASSAGE-
510 AM EDT FRI JUL 8 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN LAKE
MICHIGAN.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE POSSIBLE TODAY INTO THIS EVENING. SOME STORMS COULD
PRODUCE SMALL HAIL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE IS A CHANCE OF THUNDERSTORMS TUESDAY THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...

THE NEED FOR WEATHER SPOTTER REPORTS IS NOT ANTICIPATED AT THIS
TIME.

VOSS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MARQUETTE MI
1021 AM EDT FRI JUL 8 2016

MIZ013-081500-
DELTA MI-
1021 AM EDT FRI JUL 8 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DELTA COUNTY UNTIL
1100 AM EDT...

AT 1021 AM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS
ALONG A LINE EXTENDING FROM NEAR U.S. 41 BETWEEN TRENARY AND RAPID
RIVER TO 7 MILES NORTHEAST OF STONINGTON. MOVEMENT WAS NORTHEAST AT
35 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 30 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
RAPID RIVER...NAHMA...U.S. 41 BETWEEN TRENARY AND RAPID RIVER...
FOREST ROAD 13 IN NORTHERN DELTA COUNTY...GARDEN CORNERS...
ISABELLA...ENSIGN...CHICAGO LAKE...MAPLEWOOD...
ROUND LAKE AND NAHMA JUNCTION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOODED ROADWAYS.

&&

LAT...LON 4606 8709 4616 8696 4616 8650 4610 8649
      4589 8649 4574 8688
TIME...MOT...LOC 1421Z 229DEG 31KT 4606 8700 4581 8687

TITUS