270  
FNAK71 PAFC 161306  
FWSAER  
 
SPOT FORECAST FOR SHUYAK PORT WILLIAMS OIL SPILL...USCG  
NATIONAL WEATHER SERVICE ANCHORAGE AK  
506 AM AKDT MON APR 16 2018  
 
FORECAST IS BASED ON INCIDENT TIME OF 0700 AKDT ON APRIL 16.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
SEVERAL FRONTS WILL MAKE FOR RATHER WET CONDITIONS WITH MODERATE  
EASTERLY FLOW THROUGH THE MIDDLE OF THE WEEK. THE FIRST FRONT WILL  
MOVE IN THIS MORNING AND BRING UPWARDS OF A HALF INCH OF RAIN TO  
THE ISLAND THROUGH THIS EVENING. EASTERLY FLOW WILL CONTINUE TO  
PUSH MOISTURE UP AGAINST THE TERRAIN AND PRODUCE LOWERING  
CEILINGS AND VISIBILITIES IN PLACES. WHILE RAIN WILL LIGHTEN UP  
OVERNIGHT INTO TUE, CONDITIONS ON THE WHOLE WILL IMPROVE VERY  
LITTLE AS THE FRONT FALLS APART OVER THE AREA. THE NEXT FRONT WILL  
BE RIGHT ON ITS HEELS TUE REINVIGORATING THE STEADY RAIN AND  
REINFORCING THE EASTERLY FLOW.  
   
TODAY
 
 
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN.  
CHANCE OF PCPN......100 PERCENT.  
MAX TEMPERATURE.....AROUND 42.  
SURFACE WINDS.......EAST WINDS 17 TO 18 MPH.  
WAVE HEIGHT.........2 TO 3 FT BUILDING TO 3 TO 5 FT.  
FREEZING SPRAY......NONE.  
SEA SURFACE TEMP....41F.  
 
MARINE ROUTE:  
KODIAK TO PORT WILLIAM...SE TO E WIND 10 TO 15 KT...EXCEPT NE 20  
TO 30 NORTH OF AFOGNAK ISLAND AND ALONG SHELIKOF STRAIT. SEAS 3 TO  
6 FT.  
 
PORT WILLIAM TO HOMER...E WIND 30 TO 35 KT THROUGH THE BARREN  
ISLANDS. SEAS 8 TO 12 FT. NEAR HOMER/KACHEMAK BAY...N TO NE WINDS 5  
TO 15 KT WITH SEAS 2 TO 3 FT.  
 
AVIATION: LIFR CONDITIONS IN FOG MAY IMPROVE TO MVFR THIS MORNING  
BEFORE BECOMING IFR AGAIN THIS AFTERNOON. OCCASIONAL TO  
CONTINUOUS MODERATE ICING 6000-16000 FT IN THE MORNING BECOMING  
ISOLATED MODERATE IN THE AFTERNOON.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). RAIN IN THE EVENING,  
THEN RAIN LIKELY AFTER MIDNIGHT.  
CHANCE OF PCPN......90 PERCENT.  
MIN TEMPERATURE.....AROUND 38.  
SURFACE WINDS.......EAST WINDS 15 TO 17 MPH.  
WAVE HEIGHT.........2 TO 4 FEET.  
FREEZING SPRAY......NONE.  
SEA SURFACE TEMP....41F.  
 
MARINE ROUTE:  
KODIAK TO PORT WILLIAM...E WIND 15 TO 30 KT. SEAS 4 TO 8 FT.  
 
PORT WILLIAM TO HOMER...E WIND 20 TO 30 KT THROUGH THE BARREN  
ISLANDS. SEAS 6 TO 10 FT. NEAR HOMER/KACHEMAK BAY...N TO NE WINDS  
10 TO 15 KT DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 4  
FT.  
 
AVIATION: IFR CONDITIONS LIKELY. ISOLATED MODERATE ICING  
6000-16000 FT.  
   
TUESDAY
 
 
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN.  
CHANCE OF PCPN......80 PERCENT.  
MAX TEMPERATURE.....AROUND 43.  
SURFACE WINDS.......EAST WINDS 15 TO 17 MPH.  
WAVE HEIGHT.........3 TO 5 FEET.  
FREEZING SPRAY......NONE.  
SEA SURFACE TEMP....41F.  
 
MARINE ROUTE:  
KODIAK TO PORT WILLIAM...E WIND 15 TO 20 KT...EXCEPT NE 20 TO 30  
NORTH OF AFOGNAK ISLAND. SEAS 2 TO 5 FT...EXCEPT 8 TO 11 FT NORTH  
OF AFOGNAK ISLAND.  
 
PORT WILLIAM TO HOMER...E WIND 25 TO 30 KT THROUGH THE BARREN  
ISLANDS INCREASING TO 30 TO 35 KT IN THE AFTERNOON. SEAS 9 TO 12  
FT BUILDING TO 11 TO 14 FT IN THE AFTERNOON. NEAR HOMER/KACHEMAK  
BAY...N TO E 5 TO 10 KT INCREASING TO 15 KT IN THE AFTERNOON. SEAS  
2 TO 3 FT.  
 
AVIATION: IFR CONDITIONS LIKELY WITH SLOW IMPROVEMENT MVFR THROUGH  
THE DAY. ISOLATED MODERATE ICING 6000-16000 FT.  
 

 
FORECASTER...OTTENWELLER  
REQUESTED BY...NOAA SSC, CATHERINE BERG  
TYPE OF REQUEST...MARINE  
.TAG 1802635.47/AER  
.EMAIL CATHERINE.BERG@NOAA.GOV  
 
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