Alert archive / Guam / Small Craft Advisories in 2021
Small Craft Advisory 21, NWS Guam
NWS Guam issued this small craft advisory at Dec 10, 2021, 12:11 AM CST. It took effect at Dec 10, 2021, 2:00 PM CST. It was in force for 4 days.
The area
The counties it named.
The facts
- Issued
- Dec 10, 2021, 12:11 AM CST (06:11 UTC)
- In effect from
- Dec 10, 2021, 2:00 PM CST
- Expired
- Dec 14, 2021, 11:32 PM CST
- In force
- 4 days
- Issued by
- NWS Guam
The text
As transmitted.
384 WHGM70 PGUM 100611 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 411 PM ChST Fri Dec 10 2021 PMZ153-154-102100- /O.NEW.PGUM.SC.Y.0021.211210T2000Z-211213T2000Z/ Tinian Coastal Waters-Saipan Coastal Waters- 411 PM ChST Fri Dec 10 2021 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM SATURDAY THROUGH EARLY TUESDAY MORNING... * WHAT...Seas building to between 8 and 10 feet Saturday morning, then building to between 9 and 12 feet Sunday. Winds will increase to 15 to 25 knots Saturday night. * WHERE...Tinian and Saipan Coastal Waters. * WHEN...From 6 AM Saturday to 6 AM ChST Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PMZ151-152-102100- /O.NEW.PGUM.SC.Y.0021.211211T0800Z-211213T2000Z/ Guam Coastal Waters-Rota Coastal Waters- 411 PM ChST Fri Dec 10 2021 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM SATURDAY THROUGH EARLY TUESDAY MORNING... * WHAT...Seas building to between 8 and 11 feet Saturday evening. Winds will increase to 15 to 25 knots Sunday. * WHERE...Guam and Rota Coastal Waters. * WHEN...From 6 PM Saturday to 6 AM ChST Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Kleeschulte
10 follow-up statements
442 WHGM70 PGUM 101930 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 530 AM ChST Sat Dec 11 2021 PMZ153-154-110900- /O.CON.PGUM.SC.Y.0021.211210T2000Z-211213T2000Z/ Tinian Coastal Waters-Saipan Coastal Waters- 530 AM ChST Sat Dec 11 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM TUESDAY... * WHAT...East winds 15 to 25 kt with gusts to 30 kt and seas of 9 to 12 feet. * WHERE...Tinian and Saipan Coastal Waters. * WHEN...Until 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PMZ151-152-110900- /O.CON.PGUM.SC.Y.0021.211211T0800Z-211213T2000Z/ Guam Coastal Waters-Rota Coastal Waters- 530 AM ChST Sat Dec 11 2021 ...SMALL CRAFT ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 6 AM TUESDAY... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 8 to 11 feet expected. * WHERE...Guam and Rota Coastal Waters. * WHEN...From 6 PM this evening to 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Aydlett
908 WHGM70 PGUM 110621 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 421 PM ChST Sat Dec 11 2021 PMZ153-154-111900- /O.CON.PGUM.SC.Y.0021.000000T0000Z-211213T2000Z/ Tinian Coastal Waters-Saipan Coastal Waters- 421 PM ChST Sat Dec 11 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM CHST TUESDAY... * WHAT...East winds 15 to 25 kt with occasional gusts to 35 kt and seas of 9 to 12 feet. * WHERE...Tinian and Saipan Coastal Waters. * WHEN...Until 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ PMZ151-152-111900- /O.CON.PGUM.SC.Y.0021.211211T0800Z-211213T2000Z/ Guam Coastal Waters-Rota Coastal Waters- 421 PM ChST Sat Dec 11 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM CHST TUESDAY... * WHAT...East winds 15 to 25 kt with occasional gusts up to 30 kt and seas 8 to 11 feet expected. * WHERE...Guam and Rota Coastal Waters. * WHEN...From 6 PM this evening to 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
380 WHGM70 PGUM 111958 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 558 AM ChST Sun Dec 12 2021 PMZ151>154-120900- /O.CON.PGUM.SC.Y.0021.000000T0000Z-211213T2000Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 558 AM ChST Sun Dec 12 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM TUESDAY... * WHAT...East winds 15 to 25 kt with gusts up to 35 kt and seas 10 to 12 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Strongest winds and gusts, and highest seas are expected over Tinian and Saipan waters and marginally less for Guam and Rota waters. Seas and winds will lessen Tuesday, falling below hazardous levels. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Aydlett
670 WHGM70 PGUM 120709 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 509 PM ChST Sun Dec 12 2021 PMZ151>154-122100- /O.CON.PGUM.SC.Y.0021.000000T0000Z-211213T2000Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 509 PM ChST Sun Dec 12 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM TUESDAY... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 8 to 11 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Strongest winds and highest seas are expected over Tinian and Saipan waters, marginally less for Guam and Rota waters. Seas and wind will lessen Tuesday, possibly falling below hazardous levels. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Kleeschulte
268 WHGM70 PGUM 121917 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 517 AM ChST Mon Dec 13 2021 PMZ151>154-131000- /O.CON.PGUM.SC.Y.0021.000000T0000Z-211213T2000Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 517 AM ChST Mon Dec 13 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM TUESDAY... * WHAT...East winds 15 to 25 kt with gusts up to 30 kt and seas 8 to 11 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 6 AM Tuesday. * IMPACTS...Conditions will be hazardous to small craft. * ADDITIONAL DETAILS...Strongest winds and gusts, and highest seas are expected over Tinian and Saipan waters and marginally less for Guam and Rota waters. Seas and winds will lessen tonight, possibly falling below hazardous levels. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ E.Pavliukoit
395 WHGM70 PGUM 130534 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 334 PM ChST Mon Dec 13 2021 PMZ151>154-132030- /O.EXT.PGUM.SC.Y.0021.000000T0000Z-211214T0800Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 334 PM ChST Mon Dec 13 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM CHST TUESDAY... * WHAT...East winds 15 to 20 kt and seas of 8 to 10 feet. * WHERE...Marianas coastal waters. * WHEN...Until 6 PM ChST Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Middlebrooke
150 WHGM70 PGUM 131951 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 551 AM ChST Tue Dec 14 2021 PMZ151>154-140800- /O.CON.PGUM.SC.Y.0021.000000T0000Z-211214T0800Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 551 AM ChST Tue Dec 14 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CHST THIS EVENING... * WHAT...East winds 20 kt with gusts up to 30 kt and seas 8 to 10 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 6 PM ChST this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Ziobro
575 WHGM70 PGUM 140520 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 320 PM ChST Tue Dec 14 2021 PMZ151>154-142000- /O.EXT.PGUM.SC.Y.0021.000000T0000Z-211214T2000Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 320 PM ChST Tue Dec 14 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM CHST WEDNESDAY... * WHAT...East winds around 20 kt with gusts up to 25 kt and seas 8 to 10 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 6 AM ChST Wednesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Middlebrooke
678 WHGM70 PGUM 141955 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 555 AM ChST Wed Dec 15 2021 PMZ151>154-150800- /O.EXT.PGUM.SC.Y.0021.000000T0000Z-211215T0800Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 555 AM ChST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM CHST THIS EVENING... * WHAT...East winds around 20 kt with gusts up to 25 kt and seas 7 to 9 feet. * WHERE...Marianas Coastal Waters. * WHEN...Until 6 PM ChST this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ Ziobro
205 WHGM70 PGUM 150532 MWWGUM URGENT - MARINE WEATHER MESSAGE National Weather Service Tiyan GU 332 PM ChST Wed Dec 15 2021 PMZ151>154-150645- /O.CAN.PGUM.SC.Y.0021.000000T0000Z-211215T0800Z/ Guam Coastal Waters-Rota Coastal Waters-Tinian Coastal Waters- Saipan Coastal Waters- 332 PM ChST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY IS CANCELLED... Seas have subsided to between 7 and 9 feet, and winds are holding around 20 knots. These conditions are expected to persist through the next couple of days, just below advisory levels. As a result, the Small Craft Advisory is no longer in effect. However, anyone planning marine activities should check the latest forecasts and advisories, as slight increases in winds or seas could result in hazardous marine conditions. $$ Middlebrooke
Nearby
Small Craft Advisories in Guam, 2021Every small craft advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.