Area Forecast Discussion
Issued by NWS Duluth, MN

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000
FXUS63 KDLH 032019
AFDDLH

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
319 PM CDT FRI JUL 3 2015

.SHORT TERM...(THIS EVENING THROUGH SATURDAY)
ISSUED AT 319 PM CDT FRI JUL 3 2015

A COLD FRONT WILL CONTINUE MOVING SOUTH THROUGH THE NORTHLAND THIS
AFTERNOON AND THIS EVENING...RESULTING IN SCATTERED SHOWERS AND
THUNDERSTORMS UNTIL THE FRONT EXITS THE NORTHLAND LATE THIS
EVENING. THE THREAT OF SEVERE WEATHER IS VERY LOW...BUT THERE
COULD BE ISOLATED STRONGER STORM CELLS CAPABLE OF SMALL HAIL.
WHILE MIXED LAYER CAPE WILL BUILD TO ABOUT 500 TO 1500 J/KG...THE
LACK OF DEEP LAYER WIND SHEAR WILL MAKE IT DIFFICULT FOR ANY
STORMS TO BECOME ORGANIZED.

A LAYER OF SMOKE HIGH IN THE ATMOSPHERE...RESULTING FROM
CANADIAN WILDFIRES UPSTREAM OF THE NW FLOW ALOFT...WILL CONTINUE
TO AFFECT PORTIONS OF THE NORTHLAND...MOSTLY THE WESTERN AND
SOUTHERN FORECAST AREAS. THIS MAY HAVE IMPLICATIONS ON THE LOW
TEMPERATURE FORECAST FOR TONIGHT. HIGH PRESSURE IN CANADA WILL
MOVE INTO THE REGION AND PROMOTE RADIATIONAL COOLING TONIGHT DUE
TO VERY LIGHT WIND SPEEDS AND CLEARING SKIES...BUT THE SMOKE WILL
HELP INSULATE AREAS. LEANED ON THE COOLER MOS GUIDANCE...BUT MAY
NEED TO REEVALUATE THE TEMPERATURE FORECAST FOR THE WESTERN AND
SOUTHERN FORECAST AREA...WHICH IS WHERE THE SMOKE WILL MOST
LIKELY LINGER.

WARM SOUTHERLY FLOW WILL DEVELOP SATURDAY IN THE WAKE OF THE
PASSING HIGH PRESSURE. THE SKIES SHOULD BE SUNNY TO MOSTLY
SUNNY...EXCEPT FOR WHERE THERE COULD BE THE SMOKE LAYER.
TEMPERATURES SHOULD CLIMB INTO THE UPPER 70S AND LOW 80S FOR MOST
AREAS...BUT IT WILL BE COOLER NEAR LAKE SUPERIOR DUE TO THE LAKE
BREEZE. THERE IS A VERY LOW POSSIBILITY OF PCPN DURING THE
DAY...BUT THE MAJORITY OF THE MODELS KEEP THE PCPN SOUTH AND WEST
OF THE FORECAST AREA.

.LONG TERM...(SATURDAY NIGHT THROUGH FRIDAY)
ISSUED AT 319 PM CDT FRI JUL 3 2015

MAIN FOCUS IS ON LONG WAVE TROUGH THAT TRANSLATES ACROSS THE
CANADIAN ROCKIES...DEEPENING INTO A CLOSED LOW OVER
MANITOBA/HUDSON BAY SUNDAY. THIS LOW WILL SWEEP AN H850 LOW WITH
SFC COLD FRONT ACROSS THE NORTHLAND DURING THE LATE SUNDAY THROUGH
MONDAY PERIODS. LATEST LONG RANGE GUIDANCE IS IN GOOD AGREEMENT
THAT THE BULK OF THE ACTIVITY REACHES THE FAR NW ZONES...KOOCH
COUNTY INTO THE CHIPPEWA NATL FOREST SUNDAY EVENING...THEN SLOWLY
PUSHES EAST OVER NORTHEAST MINNESOTA THROUGH THE NIGHT...REACHING
THE TWIN PORTS DURING THE EARLY MONDAY MORNING HOURS. THE SLOW
MOVING FRONT...AND ASSOCIATED RAIN/THUNDERSTORMS WILL IMPACT AREAS
IN WISCONSIN THROUGH MUCH OF THE DAY MONDAY.

THESE STORMS WILL BRING PERIODS OF HEAVY RAIN. LATEST GFS/NAM
SUGGEST PWAT VALUES INCREASE IN EXCESS OF 2 INCHES DUE TO THE
SOUTHERLY FETCH AHEAD OF THE FRONT. LATEST NAM SUGGESTS CAPE
VALUES FALL TO GENERALLY AROUND 1000 J/KG SUNDAY
NIGHT...SUPPORTING STORMS WITH HEAVY RAINFALL. WIDESPREAD AMOUNTS
AROUND AN INCH ARE EXPECTED...WITH LOCALLY HIGHER AMOUNTS OF 2
INCHES OR MORE POSSIBLE.

TEMPERATURES ON SUNDAY WILL WARM INTO THE 80S IN MOST AREAS. THE
HEAT COMBINED WITH ELEVATED HUMIDITY WILL PRODUCE VERY MUGGY
FEELING CONDITIONS. THE EXCEPTION WILL BE ALONG THE NORTH SHORE OF
LAKE SUPERIOR WHERE TEMPERATURES WILL REMAIN IN THE 60S TO LOW
70S.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SATURDAY AFTERNOON)
ISSUED AT 1220 PM CDT FRI JUL 3 2015

A THICK LAYER OF HIGH LEVEL SMOKE CAN BE SEEN ON CURRENT
SATELLITE IMAGERY OVER MUCH OF THE GREAT LAKES REGION. THE SMOKE
HAS BROUGHT REDUCED VISIBILITY TO 4 TO 6SM AT MOST LOCATIONS. A
COLD FRONT WILL TRIGGER SHOWERS AND A FEW THUNDERSTORMS THIS
AFTERNOON. THE MAIN FOCUS FOR ANY STORMS IS EXPECTED FROM THE KDLH
AREA...SOUTH ACROSS NORTHERN WISCONSIN...AFFECTING THE KHYR TAF
SITE THROUGH 00Z. ANY STORMS TODAY WILL HAVE THE POTENTIAL TO
CONTAIN SMALL HAIL...GUSTY WINDS AND BRIEF HEAVY DOWNPOURS. VFR
CONDITIONS WILL PREVAIL OVERNIGHT WITH THE POSSIBILITY OF PATCHY
FOG...MAINLY OVER WISCONSIN.

&&

.PRELIMINARY POINT TEMPS/POPS...
DLH  56  77  56  81 /   0   0   0  20
INL  50  84  61  81 /   0  10  20  80
BRD  59  85  63  85 /   0  10  10  70
HYR  52  82  60  82 /  40  10  10  10
ASX  54  74  56  83 /  20   0   0  10

&&

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

$$

SHORT TERM...GROCHOCINSKI
LONG TERM...GRANING
AVIATION...GRANING



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