Area Forecast Discussion
Issued by NWS Grand Rapids, MI

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FXUS63 KGRR 290727
AFDGRR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
325 AM EDT FRI APR 29 2016

LATEST UPDATE...
SYNOPSIS/SHORT TERM/LONG TERM/MARINE

.SYNOPSIS...
ISSUED AT 325 AM EDT FRI APR 29 2016

A FEW LIGHT RAIN SHOWERS AND SPRINKLES WILL LINGER TODAY BEFORE
HIGH PRESSURE TO THE NORTH OF THE GREAT LAKES REGION BRIEFLY
BUILDS IN TO PRODUCE FAIR WEATHER TONIGHT INTO SATURDAY. HOWEVER
ANOTHER LOW PRESSURE SYSTEM WILL MOVE NORTHEAST INTO THE LOWER
OHIO VALLEY REGION THIS WEEKEND AND BRING SOME SHOWERS TO SOUTHERN
LOWER MICHIGAN LATE SATURDAY THROUGH SATURDAY NIGHT.

&&

.SHORT TERM...(TODAY THROUGH SUNDAY)
ISSUED AT 325 AM EDT FRI APR 29 2016

COOL WEATHER WILL CONTINUE TODAY WITH EXTENSIVE CLOUD COVER AND
PERISTENT NE WINDS ALONG WITH SOME LINGERING LIGHT RAIN SHOWERS
AND SPRINKLES. HIGH TEMPS TODAY WILL ONLY REACH THE LOWER TO
PERHAPS MIDDLE 50S.

DRY WX IS ANTICIPATED TONIGHT THROUGH AT LEAST MIDDAY SATURDAY AS
HIGH PRESSURE TO THE NORTH BRIEFLY TAKES HOLD. HOWEVER A LOW
PRESSURE SYSTEM OVER THE SOUTHERN PLAINS SATURDAY WILL MOVE NE
INTO THE LWR OH VALLEY REGION SATURDAY NIGHT AND SUNDAY.

THIS SYSTEM WILL BRING SHOWERS TO AREAS MAINLY NEAR TO SOUTH OF
I-96 LATE SATURDAY THROUGH SATURDAY NIGHT. ANY LINGERING LIGHT
SHOWERS OR SPRINKLES EARLY SUNDAY MORNING SHOULD TAPER OFF BY
MIDDAY AS A RIDGE TO THE NW BUILDS IN. TEMPS WILL AVERAGE AROUND 5
TO 10 DEGREES BELOW NORMAL THROUGH SUNDAY.

.LONG TERM...(SUNDAY NIGHT THROUGH THURSDAY)
ISSUED AT 325 AM EDT FRI APR 29 2016

SFC HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE NORTHWEST ON
SUNDAY NIGHT AND WILL PROVIDE A PERIOD OF NICE WEATHER ON MONDAY
INTO TUESDAY. STILL SOMEWHAT COOL ON MONDAY... BUT GUIDANCE TEMPS
CONTINUE TO TREND UP FOR TUESDAY AS THERMAL RIDGE SNEAKS IN FROM THE
WEST AHEAD OF UPR TROUGH/SFC COLD FRONT DROPPING SOUTH FROM CANADA.
WE SHOULD SEE READINGS PUSHING 70 TUESDAY INLAND FROM LAKE MICHIGAN.
THEN THE SFC COLD FRONT DROPS SOUTH THROUGH LWR MI LATE TUESDAY
NIGHT AND WEDNESDAY MORNING...BRINGING WITH IT A BAND OF RAIN
SHOWERS.

MODELS CONTINUE TO SHOW AN UPR TROUGH AND COOLER TEMPS ALOFT
IMPACTING THE AREA WEDNESDAY AND THURSDAY AS UPSTREAM RIDGE BUILDS
OVER THE ROCKIES. HOWEVER THE UPR TROUGH AXIS IS PROGGED TO SET UP
TO OUR EAST AND MOISTURE LOOKS LIMITED. SOME DIURNAL SHOWERS WILL
STILL BE POSSIBLE... MAINLY INLAND FROM LAKE MICHIGAN... BUT
COVERAGE SHOULD BE LIMITED AND INTERVALS OF SUNSHINE ARE STILL
POSSIBLE WITH SFC DEW PTS ONLY IN THE 30S.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z FRIDAY NIGHT)
ISSUED AT 1153 PM EDT THU APR 28 2016

SOME IFR IS POSSIBLE OVERNIGHT ACROSS SOUTHERN LOWER MICHIGAN
OTHERWISE MVFR CONDITIONS WILL PREVAIL THROUGH FRIDAY MORNING
WITH IMPROVEMENT TO VFR IN THE AFTERNOON.

WINDS WILL REMAIN EAST TO NORTHEAST AOB 10 KNOTS.


&&

.MARINE...
ISSUED AT 325 AM EDT FRI APR 29 2016

CONTINUED ENE WINDS WILL RESULT IN MINIMAL WAVE ACTION TODAY AND
WINDS AND WAVES WILL REMAIN WELL BELOW SMALL CRAFT CRITERIA INTO
THE WEEKEND.

&&

.HYDROLOGY...
ISSUED AT 1052 AM EDT THU APR 28 2016

RECENT RAINFALLS HAVE RESULTED IN MINOR RISES ON STREAMS.
SIGNIFICANT RISES ON MAIN STEM RIVERS ARE NOT LIKELY GIVEN THE
LIMITED PRECIPITATION. ADDITIONAL RAINFALL TODAY AND THIS WEEKEND
WILL ACT TO KEEP SMALLER STREAMS AND RIVERS ELEVATED... WITH A
SMALLER CHANCE FOR ELEVATED MAIN STEM RIVERS. FLOODING IS NOT
EXPECTED AT THIS TIME.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...NONE.
LM...NONE.
&&

$$

SYNOPSIS...LAURENS
SHORT TERM...LAURENS
LONG TERM...MEADE
AVIATION...OSTUNO
HYDROLOGY...63
MARINE...LAURENS


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