Alert archive / California / Small Craft Advisories in 2008
Small Craft Advisory 48, NWS Eureka, CA
NWS Eureka, CA issued this small craft advisory at Aug 21, 2008, 2:00 PM PDT. It took effect at Aug 21, 2008, 11:00 PM PDT. It was in force for 39 hr.
The area
The counties it named.
The facts
- Issued
- Aug 21, 2008, 2:00 PM PDT (21:00 UTC)
- In effect from
- Aug 21, 2008, 11:00 PM PDT
- Expired
- Aug 23, 2008, 2:13 PM PDT
- In force
- 39 hr
- Issued by
- NWS Eureka, CA
The text
As transmitted, in the capitals the NWS used until 2016.
000 WHUS76 KEKA 212100 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 200 PM PDT THU AUG 21 2008 PZZ470-220500- /O.EXT.KEKA.SW.Y.0054.000000T0000Z-080822T1600Z/ /O.NEW.KEKA.SC.Y.0048.080822T1600Z-080823T1500Z/ PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM- 200 PM PDT THU AUG 21 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT UNTIL 9 AM PDT FRIDAY... ...SMALL CRAFT ADVISORY FOR WINDS AND HAZARDOUS SEAS IN EFFECT FROM 9 AM FRIDAY TO 8 AM PDT SATURDAY... MODERATE NORTHWEST SWELL WILL PEAK AROUND 11 TO 12 FT AT 12 SECONDS LATE THIS AFTERNOON AND OVERNIGHT. THE LONGER PERIOD NW SWELL WILL GRADUALLY SUBSIDE LATE FRIDAY AFTERNOON. NORTHERLY WINDS WILL INCREASE OVERNIGHT TO ADVISORY LEVELS AS HIGH PRESSURE REBUILDS OVER THE NE PACIFIC. THE STRONG WINDS WILL LEAD TO STEEP WIND DRIVEN SEAS...KEEPING THE COMBINED SEA STATE NEAR 10 FT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ475-220500- /O.EXT.KEKA.SW.Y.0054.000000T0000Z-080822T0600Z/ /O.NEW.KEKA.SC.Y.0048.080822T0600Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 200 PM PDT THU AUG 21 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS NOW IN EFFECT UNTIL 11 PM PDT THIS EVENING... ...SMALL CRAFT ADVISORY FOR WINDS AND HAZARDOUS SEAS IN EFFECT FROM 11 PM THIS EVENING TO 7 PM PDT SATURDAY... MODERATE NORTHWEST SWELL WILL PEAK AROUND 11 TO 12 FT AT 12 SECONDS LATE THIS AFTERNOON AND OVERNIGHT. THE LONGER PERIOD NW SWELL WILL GRADUALLY SUBSIDE LATE FRIDAY AFTERNOON. NORTHERLY WINDS WILL INCREASE OVERNIGHT TO ADVISORY LEVELS AS HIGH PRESSURE REBUILDS OVER THE NE PACIFIC. THE STRONG WINDS WILL LEAD TO STEEP WIND DRIVEN SEAS...KEEPING THE COMBINED SEA STATE NEAR 10 FT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ450-455-220500- /O.CON.KEKA.SW.Y.0054.000000T0000Z-080823T0000Z/ PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM- CAPE MENDOCINO TO PT ARENA OUT 10 NM- 200 PM PDT THU AUG 21 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 5 PM PDT FRIDAY... MODERATE NORTHWEST SWELL WILL PEAK AROUND 11 TO 12 FT AT 12 SECONDS LATE THIS AFTERNOON AND OVERNIGHT. THE NW SWELL WILL GRADUALLY SUBSIDE BELOW ADVISORY LEVELS LATE FRIDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. && $$
6 follow-up statements
000 WHUS76 KEKA 220332 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 832 PM PDT THU AUG 21 2008 PZZ470-221145- /O.CON.KEKA.SW.Y.0054.000000T0000Z-080822T1600Z/ /O.CON.KEKA.SC.Y.0048.080822T1600Z-080823T1500Z/ PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM- 832 PM PDT THU AUG 21 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 9 AM PDT FRIDAY... ...SMALL CRAFT ADVISORY FOR WINDS AND HAZARDOUS SEAS REMAINS IN EFFECT FROM 9 AM FRIDAY TO 8 AM PDT SATURDAY... MODERATE NORTHWEST SWELL WILL BEGIN TO GRADUALLY SUBSIDE OVERNIGHT AND CONTINUE THROUGH FRIDAY AFTERNOON. NORTHERLY WINDS WILL INCREASE OVERNIGHT AS HIGH PRESSURE REBUILDS OVER THE NE PACIFIC. THE STRONG WINDS WILL LEAD TO STEEP WIND DRIVEN SEAS...KEEPING THE COMBINED SEA STATE NEAR 10 FT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ475-221145- /O.CON.KEKA.SW.Y.0054.000000T0000Z-080822T0600Z/ /O.CON.KEKA.SC.Y.0048.080822T0600Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 832 PM PDT THU AUG 21 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... ...SMALL CRAFT ADVISORY FOR WINDS AND HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 7 PM PDT SATURDAY... MODERATE NORTHWEST SWELL WILL BEGIN TO GRADUALLY SUBSIDE OVERNIGHT AND CONTINUE THROUGH FRIDAY AFTERNOON. NORTHERLY WINDS WILL INCREASE OVERNIGHT AS HIGH PRESSURE REBUILDS OVER THE NE PACIFIC. THE STRONG WINDS WILL LEAD TO STEEP WIND DRIVEN SEAS...KEEPING THE COMBINED SEA STATE NEAR 10 FT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ450-455-221145- /O.CON.KEKA.SW.Y.0054.000000T0000Z-080823T0000Z/ PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM- CAPE MENDOCINO TO PT ARENA OUT 10 NM- 832 PM PDT THU AUG 21 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 5 PM PDT FRIDAY... MODERATE NORTHWEST SWELL WILL BEGIN TO GRADUALLY SUBSIDE OVERNIGHT DROPPING BELOW ADVISORY LEVELS FRIDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. && $$
000 WHUS76 KEKA 220949 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 249 AM PDT FRI AUG 22 2008 PZZ470-230015- /O.CON.KEKA.SW.Y.0054.000000T0000Z-080822T1600Z/ /O.CON.KEKA.SC.Y.0048.080822T1600Z-080823T1500Z/ PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM- 249 AM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... ...SMALL CRAFT ADVISORY FOR WINDS AND HAZARDOUS SEAS REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 8 AM PDT SATURDAY... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING. A SMALL CRAFT ADVISORY FOR WINDS AND HAZARDOUS SEAS REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 8 AM PDT SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ475-230015- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 249 AM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT SATURDAY... A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ450-455-230000- /O.CON.KEKA.SW.Y.0054.000000T0000Z-080823T0000Z/ PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM- CAPE MENDOCINO TO PT ARENA OUT 10 NM- 249 AM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS REMAINS IN EFFECT UNTIL 5 PM PDT THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS MEANS THAT WAVES ARE EXPECTED TO BE LARGE AND OR STEEP ENOUGH TO CREATE POTENTIAL HAZARD TO SMALL CRAFT. && $$
000 WHUS76 KEKA 222105 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 205 PM PDT FRI AUG 22 2008 PZZ450-455-222215- /O.CAN.KEKA.SW.Y.0054.000000T0000Z-080823T0000Z/ PT ST GEORGE TO CAPE MENDOCINO OUT 10 NM- CAPE MENDOCINO TO PT ARENA OUT 10 NM- 205 PM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS IS CANCELLED... THE NATIONAL WEATHER SERVICE IN EUREKA HAS CANCELLED THE SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS. NORTHWEST SWELL DROPPED BELOW ADVISORY CONDITIONS LATE THIS MORNING...THEREFORE THE SMALL CRAFT ADVISORY HAS BEEN CANCELLED. $$ PZZ470-230515- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080823T1500Z/ PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM- 205 PM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT SATURDAY... MODERATE NORTHERLY WINDS OVER THE OFFSHORE WATERS WILL CONTINUE TO GENERATE STEEP WIND DRIVEN WAVES THROUGH TOMORROW AS HIGH PRESSURE OFFSHORE INTERACTS WITH LOW PRESSURE OVER CENTRAL CALIFORNIA. WINDS AND SEAS ARE EXPECTED TO EASE BY MID MORNING ON SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ475-230515- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 205 PM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT SATURDAY... MODERATE NORTHERLY WINDS OVER THE OFFSHORE WATERS WILL CONTINUE TO GENERATE STEEP WIND DRIVEN WAVES THROUGH TOMORROW AS HIGH PRESSURE OFFSHORE INTERACTS WITH LOW PRESSURE OVER CENTRAL CALIFORNIA. WINDS AND SEAS ARE EXPECTED TO EASE BY LATE EVENING ON SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$
000 WHUS76 KEKA 230336 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 836 PM PDT FRI AUG 22 2008 PZZ470-231145- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080823T1500Z/ PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM- 836 PM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT SATURDAY... MODERATE NORTHERLY WINDS OVER THE OFFSHORE WATERS WILL CONTINUE TO GENERATE STEEP WIND DRIVEN WAVES THROUGH TOMORROW AS HIGH PRESSURE OFFSHORE INTERACTS WITH LOW PRESSURE OVER CENTRAL CALIFORNIA. WINDS AND SEAS ARE EXPECTED TO EASE BY MID MORNING ON SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ475-231145- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 836 PM PDT FRI AUG 22 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT SATURDAY... MODERATE NORTHERLY WINDS OVER THE OFFSHORE WATERS WILL CONTINUE TO GENERATE STEEP WIND DRIVEN WAVES THROUGH TOMORROW AS HIGH PRESSURE OFFSHORE INTERACTS WITH LOW PRESSURE OVER CENTRAL CALIFORNIA. WINDS AND SEAS ARE EXPECTED TO EASE BY LATE EVENING ON SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$
000 WHUS76 KEKA 231137 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 437 AM PDT SAT AUG 23 2008 PZZ470-231500- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080823T1500Z/ PT ST GEORGE TO CAPE MENDOCINO 10 TO 60 NM- 437 AM PDT SAT AUG 23 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$ PZZ475-231945- /O.CON.KEKA.SC.Y.0048.000000T0000Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 437 AM PDT SAT AUG 23 2008 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING... A SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS FOR SMALL CRAFT. INEXPERIENCED MARINERS... ESPECIALLY THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS. && $$
000 WHUS76 KEKA 232113 MWWEKA URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 213 PM PDT SAT AUG 23 2008 PZZ475-232215- /O.CAN.KEKA.SC.Y.0048.000000T0000Z-080824T0200Z/ CAPE MENDOCINO TO PT ARENA 10 TO 60 NM- 213 PM PDT SAT AUG 23 2008 ...SMALL CRAFT ADVISORY IS CANCELLED... SATELLITE DERIVED WINDS EARLIER THIS MORNING AND SURFACE ANALYSIS THIS AFTERNOON INDICATE THAT WINDS HAVE DROPPED BELOW ADVISORY CRITERIA FOR MOST OF THE SOUTHERN OFFSHORE WATERS. THEREFORE...THE ADVISORY HAS BEEN CANCELLED. OCCASIONAL GUSTS TO 25 KT CAN STILL BE EXPECTED THROUGH THE REMAINDER OF THE DAY...ESPECIALLY SOUTH AND WEST OF CAPE MENDOCINO. $$
What forecasters said that day
The local office's own words before this small craft advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Eureka, CA wrote its last area forecast discussion before this small craft advisory went out at Aug 21, 5:47 AM PDT, 8 hours 13 minutes earlier.
Area forecast discussion, Aug 21, 5:47 AM PDT, 8 hours 13 minutes before
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE EUREKA CA 550 AM PDT THU AUG 21 .SYNOPSIS...ISOLATED SHOWERS WILL CONTINUE TO AFFECT THE NORTHERN FORECAST AREA THIS MORNING. LATER TODAY HIGH PRESSURE WILL BEGIN TO BUILD INTO THE REGION...WITH A WARMING AND DRYING TREND EXPECTED TO START FRIDAY AND PERSIST THROUGH THE WEEKEND. && .SHORT TERM....TODAY THROUGH SATURDAY...A WEAK COLD FRONT WILL MOVE INLAND AND AWAY FROM THE CWA TODAY AS AN UPPER LEVEL LOW MOVES EAST ALONG THE U.S./CANADIAN BORDER. IN THE WAKE OF THE FRONT ISOLATED SHOWERS WILL AFFECT THE NORTHERN PORTIONS OF ZONES 1 AND 3 THIS MORNING...BUT WILL DIMINISH AS HIGH PRESSURE BUILDS INTO THE PACIFIC NORTHWEST. WHILE THE RIDGE ALOFT WILL BE FAIRLY LOW AMPLITUDE...SURFACE HIGH PRESSURE WILL RAPIDLY BUILD INLAND THROUGH THE PACIFIC NORTHWEST TONIGHT...PRODUCING A GOOD WARM-UP STARTING FRIDAY ACCOMPANIED BY A DRYING TREND AS WINDS TURN TO OFFSHORE DURING THE EARLY MORNING HOURS. BY SATURDAY THE RIDGE WILL SHIFT INLAND AS ANOTHER LARGE UPPER LOW DEVELOPS IN THE GULF OF ALASKA. CC && .LONG TERM...SATURDAY NIGHT THROUGH WEDNESDAY...MODELS REMAIN IN GOOD AGREEMENT THROUGH THE WEEKEND DEPICTING MODEST RIDGING OVER NORTHERN CAL AS AND UPPER LOW MOVES OUT OF THE GULF OF ALASKA. THIS WILL ALLOW A THERMAL TROUGH TO DEVELOP OVER CENTRAL CA WITH WEAK OFFSHORE NIGHT-TIME WINDS PROMOTING POOR RH RECOVERY THROUGH THE WEEKEND. TEMPS WILL MODERATE BY EARLY NEXT WEEK AS HEIGHTS LOWER ACROSS THE PAC NW IN RESPONSE TO THE APPROACHING TROUGH. MODEL SOLUTIONS DIVERGE SIGNIFICANTLY BY THE MIDDLE OF NEXT WEEK WITH GFS SHOWING A MEAN TROUGH OVER THE PAC NW. MEANWHILE...THE ECMWF MAINTAINS A MORE ZONAL FLOW ACROSS THE ERN PAC. ENSEMBLE MEAN SHOWS BETTER SUPPORT FOR ECMWF SO WILL TREND TOWARDS IT. BC && .AVIATION...IFR CONDITIONS WILL CONTINUE ALONG NORTH OF CAPE MENDOCINO THROUGH THE MORNING...WITH ISOLATED POST FRONTAL SHOWERS. FLIGHT CONDITIONS WILL IMPROVE TO MVFR IN THE AFTERNOON ALONG THE COAST...AND POSSIBLY TEMPORARILY VFR. INLAND AREAS CAN EXPECT VFR CONDITIONS BY THE AFTERNOON. EXPECT IFR CONDITIONS TO RETURN TO THE COAST OVERNIGHT AS THE WINDS CALM. TH && .MARINE...HAVE DELAYED THE SMALL CRAFT ADVISORY UNTIL LATE THIS MORNING. CURRENT MODEL SWELL HEIGHTS ARE 2 FT HIGHER THAN BUOY OBSERVATIONS. DISTANT BUOY #2 REPORTED 14 TO 16 FT SWELL HEIGHTS WITH 14 SECOND PERIODS LATE LAST NIGHT INTO EARLY THIS MORNING. A SIMPLE SWELL DECAY MODEL FORECASTS THE SWELL OBSERVED AT BUOY #2 WILL REACH THE NORTHERN OUTER WATERS AROUND 0900 THIS MORNING WITH HEIGHTS OF 12 FT. THE SWELL IS STILL EXPECTED TO PEAK THIS AFTERNOON NEAR 12FT AND SUBSIDE THROUGH THE WEEKEND. THE SWELL PERIOD WILL DECREASE AS THE HEIGHTS LOWER AND MAINTAIN HAZARDOUS SEAS INTO FRI AFTERNOON. TH && .EKA WATCHES/WARNINGS/ADVISORIES... SCA FOR HAZARDOUS SEAS FROM 11 AM THIS MORNING FOR ALL WATERS. && VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA
Nearby
Small Craft Advisories in California, 2008Every small craft advisory in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.