Alert archive / Guam / Small Craft Advisories in 2011
Small Craft Advisory 13, NWS Guam
NWS Guam issued this small craft advisory at Dec 12, 2011, 1:01 AM CST. It was in force for 3 days.
The area
The counties it named.
The facts
- Issued
- Dec 12, 2011, 1:01 AM CST (07:01 UTC)
- Expired
- Dec 15, 2011, 12:15 PM CST
- In force
- 3 days
- Issued by
- NWS Guam
The text
As transmitted, in the capitals the NWS used until 2016.
543 WHGM70 PGUM 120701 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 501 PM CHST MON DEC 12 2011 PMZ151>154-122100- /O.NEW.PGUM.SC.Y.0013.111212T0701Z-111214T0600Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 501 PM CHST MON DEC 12 2011 ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM CHST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A SMALL CRAFT ADVISORY...WHICH IS IN EFFECT UNTIL 4 PM CHST WEDNESDAY. A SMALL CRAFT ADVISORY MEANS THAT SUSTAINED WINDS OF 22 TO 33 KNOTS ARE EXPECTED TO PRODUCE CONDITIONS HAZARDOUS TO SMALL CRAFT. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN THESE CONDITIONS. IF NAVIGATION IS UNAVOIDABLE...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$ HTTP://WWW.PRH.NOAA.GOV/GUAM
7 follow-up statements
286 WHGM70 PGUM 121627 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 227 AM CHST TUE DEC 13 2011 PMZ151>154-130430- /O.CON.PGUM.SC.Y.0013.000000T0000Z-111214T0600Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 227 AM CHST TUE DEC 13 2011 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST WEDNESDAY... WINDS OF 20 TO 25 KT WITH HIGHER GUSTS NEAR SHOWERS WILL PRODUCE HAZARDOUS CONDITIONS FOR OPERATORS OF SMALL CRAFT THROUGH WEDNESDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID NAVIGATING IN THESE CONDITIONS. IF NAVIGATION IS UNAVOIDABLE...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$ HTTP://WWW.PRH.NOAA.GOV/GUAM
289 WHGM70 PGUM 130500 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 300 PM CHST TUE DEC 13 2011 PMZ151>154-131900- /O.CON.PGUM.SC.Y.0013.000000T0000Z-111214T0600Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 300 PM CHST TUE DEC 13 2011 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST WEDNESDAY... WINDS OF 20 TO 25 KT WITH HIGHER GUSTS NEAR SHOWERS WILL PRODUCE HAZARDOUS CONDITIONS FOR OPERATORS OF SMALL CRAFT THROUGH WEDNESDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID BOATING IN THESE CONDITIONS. IF TRAVEL BY BOAT IS NECESSARY...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$ HTTP://WWW.PRH.NOAA.GOV/GUAM
924 WHGM70 PGUM 131746 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 346 AM CHST WED DEC 14 2011 PMZ151>154-140600- /O.CON.PGUM.SC.Y.0013.000000T0000Z-111214T0600Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 346 AM CHST WED DEC 14 2011 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CHST THIS AFTERNOON... WINDS OF 20 TO 25 KT WITH HIGHER GUSTS NEAR SHOWERS WILL PRODUCE HAZARDOUS SEA CONDITIONS FOR OPERATORS OF SMALL CRAFT THROUGH THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID BOATING IN THESE CONDITIONS. IF TRAVEL BY BOAT IS NECESSARY...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$ HTTP://WWW.PRH.NOAA.GOV/GUAM
156 WHGM70 PGUM 140556 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 356 PM CHST WED DEC 14 2011 PMZ151>154-142100- /O.EXT.PGUM.SC.Y.0013.000000T0000Z-111215T0700Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 356 PM CHST WED DEC 14 2011 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 PM CHST THURSDAY... THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL 5 PM CHST THURSDAY. FREQUENT GUSTY WINDS OF 20 TO 25 KT WITH HIGHER GUSTS NEAR SHOWERS WILL PRODUCE HAZARDOUS SEA CONDITIONS FOR OPERATORS OF SMALL CRAFT THROUGH THURSDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID BOATING IN THESE CONDITIONS. IF TRAVEL BY BOAT IS NECESSARY...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$ HTTP://WWW.PRH.NOAA.GOV/GUAM
301 WHGM70 PGUM 141902 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 502 AM CHST THU DEC 15 2011 PMZ151>154-150700- /O.CON.PGUM.SC.Y.0013.000000T0000Z-111215T0700Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 502 AM CHST THU DEC 15 2011 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 PM CHST THIS AFTERNOON... WINDS OF 15 TO 25 KT WILL PRODUCE HAZARDOUS CONDITIONS FOR OPERATORS OF SMALL CRAFT THROUGH THIS AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID BOATING IN THESE CONDITIONS. IF TRAVEL BY BOAT IS NECESSARY...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$
889 WHGM70 PGUM 150647 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 447 PM CHST THU DEC 15 2011 PMZ151>154-152000- /O.EXT.PGUM.SC.Y.0013.000000T0000Z-111215T2000Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 447 PM CHST THU DEC 15 2011 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM CHST FRIDAY... THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL 6 AM CHST FRIDAY. WINDS OF 15 TO 25 KT WILL PRODUCE HAZARDOUS CONDITIONS FOR OPERATORS OF SMALL CRAFT UNTIL 6 AM FRIDAY MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER VESSELS...SHOULD AVOID BOATING IN THESE CONDITIONS. IF TRAVEL BY BOAT IS NECESSARY...EXERCISE CAUTION...ESPECIALLY WHEN ENTERING OR LEAVING HARBORS AND INLETS...AND NEAR REEF LINES. && $$ HTTP://WWW.PRH.NOAA.GOV/GUAM
308 WHGM70 PGUM 151715 MWWGUM URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE TIYAN GU 315 AM CHST FRI DEC 16 2011 PMZ151>154-151815- /O.CAN.PGUM.SC.Y.0013.000000T0000Z-111215T2000Z/ GUAM COASTAL WATERS-ROTA COASTAL WATERS-TINIAN COASTAL WATERS- SAIPAN COASTAL WATERS- 315 AM CHST FRI DEC 16 2011 ...SMALL CRAFT ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN TIYAN HAS CANCELLED THE SMALL CRAFT ADVISORY. SURFACE OBSERVATIONS...SATELLITE-DERIVED WINDS AND RADAR WINDS ALL INDICATE THAT WINDS ACROSS THE MARIANAS WATERS HAVE DIMINISHED TO 15 TO 20 KNOTS...BELOW THE 22-KNOT THRESHOLD FOR A SMALL CRAFT ADVISORY. AS A RESULT...THE ADVISORY HAS BEEN CANCELLED. $$
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 Guam wrote its last area forecast discussion before this small craft advisory went out at Dec 11, 12:54 PM CST, 12 hours 7 minutes earlier.
Area forecast discussion, Dec 11, 12:54 PM CST, 12 hours 7 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TIYAN GU 454 AM CHST MON DEC 12 2011 .SYNOPSIS... RADAR IS SHOWING SCATTERED SHOWERS DEVELOPING JUST WEST OF THE ISLANDS...WITH MORE SHOWERS OUT TO THE EAST. && .DISCUSSION... LATEST MODELS SHOW NO SIGNIFICANT CHANGE FROM PREVIOUS FORECASTS. SHOWERS CURRENTLY IN THE REGION SHOULD DECREASE BY LATE MORNING AS DRYING SETS IN ABOVE THE 800 MB LEVEL. WINDS STILL HOLDING AT 15-20 KT FOR MOST OF THE WEEK...WITH ONLY ISOLATED SHOWERS EXPECTED. && .MARINE... WW3 FINALLY BACKING OFF 10 FT SEAS IN MARIANAS WATERS...NOW SHOWING 9 FT SEAS. THIS IS CLOSER TO IPAN BUOY AND SATELLITE SEA HEIGHTS...WHICH INDICATE 7-8 FEET. NO CHANGES MADE TO WAVE GRIDS. && .EASTERN MICRONESIA... MOST OF THE CONVECTION ASSOCIATED WITH THE TRADE-WIND TROUGH IS FOUND SOUTH AND SOUTHWEST OF POHNPEI THUS ONLY ISOLATED SHOWERS ARE EXPECTED AT POHNPEI. CLOUDS WILL BEGIN TO BREAK UP AND PARTIALLY CLEAR OUT AT BOTH POHNPEI AND KOSRAE TONIGHT AND TUESDAY. MODELS SHOW CONTINUED MODERATE TO FRESH TRADES LASTING THROUGH THE WEEK AT ALL LOCATIONS. THERE CONTINUES TO BE A NOTICEABLE DIFFERENCE BETWEEN WAVE WATCH MODEL DATA AND ALTIMETRY WITH ALTIMETRY SHOWING COMBINED SEAS AT LEAST 2 FEET HIGHER NEAR KOSRAE. WILL CONTINUE HIGH SURF ADVISORY FOR BOTH KOSRAE AND MAJURO FOR A FEW MORE DAYS ESPECIALLY WITH WAVE WATCH MODEL SHOWING EAST SWELL INCREASING AT LEAST ANOTHER FOOT ON TUESDAY AND WEDNESDAY. POHNPEI IS JUST BELOW CRITERION. CURRENT ALTIMETRY DATA SHOW COMBINED SEAS OF 8 TO 9 FEET. IF LATER DATA SHOW SEAS TO BE INCREASING...THEN AN ADVISORY FOR HAZARDOUS SURF MAY NEED TO BE ISSUED. && .WESTERN MICRONESIA... ALTHOUGH MOST CONVECTION IS TO THE SOUTHEAST OF CHUUK THIS MORNING...MODELS STILL SHOW SCATTERED SHOWERS REACHING THE AREA LATER TODAY AND LASTING INTO TUESDAY AS LOW-LEVEL CONVERGENCE INCREASES ALONG THE NORTHERN END OF THE TRADE-WIND TROUGH. DRIER TRADES SHOULD SETTLE BACK IN TO THE AREA BY TUESDAY NIGHT. SHOWERS WILL REMAIN ISOLATED AT YAP AND PALAU FOR THE NEXT COUPLE OF DAYS... BUT UNSETTLED WEATHER WILL GRADUALLY SPREAD WESTWARD FROM NEAR CHUUK BY WEDNESDAY. SCATTERED SHOWERS WILL LINGER IN THE REGION THROUGH THURSDAY BEFORE SLOWLY DISSIPATING. WAVE WATCH MODEL GUIDANCE STILL SUGGESTS THE POSSIBILITY OF A HIGH SURF EVENT FOR CHUUK FROM LARGE EAST SWELL GENERATED BY STRONGER E-NE TRADE WINDS BY TUESDAY. HIGH SURF ADVISORY MAY BE NEEDED AS SOON AS TONIGHT IF ALTIMETRY DATA SHOWS A CONTINUED UPWARD TREND IN SEAS. && .GUM WATCHES/WARNINGS/ADVISORIES... GU...NONE. MARIANAS WATERS...NONE. && MIDDLEBROOKE/W. AYDLETT
Nearby
Small Craft Advisories in Guam, 2011Every small craft advisory in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.