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Tropical Depression Marty Public Advisory Number 6
2021-08-24 16:32:06| National Hurricane Center (East Pacific)
Issued at 800 AM PDT Tue Aug 24 2021 000 WTPZ33 KNHC 241432 TCPEP3 BULLETIN Tropical Depression Marty Advisory Number 6 NWS National Hurricane Center Miami FL EP132021 800 AM PDT Tue Aug 24 2021 ...MARTY WEAKENS SOME MORE AS IT MOVES WESTWARD... ...EXPECTED TO BECOME A REMNANT LOW LATER TODAY... SUMMARY OF 800 AM PDT...1500 UTC...INFORMATION ---------------------------------------------- LOCATION...20.6N 118.1W ABOUT 550 MI...885 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...W OR 270 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 800 AM PDT (1500 UTC), the center of Tropical Depression Marty was located near latitude 20.6 North, longitude 118.1 West. The depression is moving toward the west near 12 mph (19 km/h). A westward motion at a slightly slower forward speed is expected over the next couple of days, followed by a turn to the west-southwest on Thursday. Maximum sustained winds have decreased to near 35 mph (55 km/h) with higher gusts. Continued gradual weakening is expected, and Marty is forecast to degenerate to a remnant low later today. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 200 PM PDT. $$ Forecaster Stewart
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Tropical Depression Marty Forecast Advisory Number 6
2021-08-24 16:32:06| National Hurricane Center (East Pacific)
Issued at 1500 UTC TUE AUG 24 2021 000 WTPZ23 KNHC 241432 TCMEP3 TROPICAL DEPRESSION MARTY FORECAST/ADVISORY NUMBER 6 NWS NATIONAL HURRICANE CENTER MIAMI FL EP132021 1500 UTC TUE AUG 24 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 20.6N 118.1W AT 24/1500Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 10 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 20.6N 118.1W AT 24/1500Z AT 24/1200Z CENTER WAS LOCATED NEAR 20.6N 117.5W FORECAST VALID 25/0000Z 20.6N 119.9W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 25/1200Z 20.6N 121.9W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 26/0000Z 20.6N 124.0W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 26/1200Z 20.5N 126.1W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 27/0000Z 20.2N 128.4W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 27/1200Z 19.6N 130.9W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. OUTLOOK VALID 29/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.6N 118.1W NEXT ADVISORY AT 24/2100Z $$ FORECASTER STEWART
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Post-Tropical Cyclone Henri Public Advisory Number 34
2021-08-24 10:43:24| National Hurricane Center (Atlantic)
The NHC has issued its final advisory on this system. Public Advisories from the Weather Prediction Center will provide updates as long as the system remains a flood threat. Issued at 500 AM EDT Tue Aug 24 2021
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Tropical Storm Marty Forecast Discussion Number 5
2021-08-24 10:39:03| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Tue Aug 24 2021 000 WTPZ43 KNHC 240838 TCDEP3 Tropical Storm Marty Discussion Number 5 NWS National Hurricane Center Miami FL EP132021 200 AM PDT Tue Aug 24 2021 Satellite imagery indicates that Marty is currently a swirl of low-level clouds with no associated convection, with this likely due to a combination of northeasterly vertical shear and marginal sea surface temperatures. Recent ASCAT data shows maximum winds of 30-35 kt over a small area in the northern semicircle, so the initial intensity is reduced to 35 kt. The initial motion is still westward, but slower than before, at 270/11 kt. The subtropical ridge to the north of Marty will continue to steer the cyclone generally westward over the next day or two. After that, the weakening cyclone is expected to turn west- southwestward during the latter part of the week within the low-level trade wind flow. The new forecast track is similar to, but a little slower than the previous forecast, and it lies near the various consensus models. Although the current shear is forecast to diminish, a combination of decreasing sea surface temperatures and a dryer air mass along the forecast track should cause continued gradual weakening. The new intensity forecast shows the system weakening to a depression in about 24 h and degenerating to a remnant low by 48 h. If convection does not re-develop near the center, both of these events could occur earlier than forecast. FORECAST POSITIONS AND MAX WINDS INIT 24/0900Z 20.6N 117.0W 35 KT 40 MPH 12H 24/1800Z 20.6N 118.7W 35 KT 40 MPH 24H 25/0600Z 20.6N 120.9W 30 KT 35 MPH 36H 25/1800Z 20.7N 122.8W 25 KT 30 MPH 48H 26/0600Z 20.6N 124.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 26/1800Z 20.4N 127.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 27/0600Z 19.8N 129.5W 20 KT 25 MPH...POST-TROP/REMNT LOW 96H 28/0600Z 18.5N 134.5W 20 KT 25 MPH...POST-TROP/REMNT LOW 120H 29/0600Z...DISSIPATED $$ Forecaster Beven
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Tropical Storm Marty Public Advisory Number 5
2021-08-24 10:37:59| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Tue Aug 24 2021 554 WTPZ33 KNHC 240837 TCPEP3 BULLETIN Tropical Storm Marty Advisory Number 5 NWS National Hurricane Center Miami FL EP132021 200 AM PDT Tue Aug 24 2021 ...MARTY WEAKENING AS IT MOVES WESTWARD... SUMMARY OF 200 AM PDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...20.6N 117.0W ABOUT 480 MI...775 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 270 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 200 AM PDT (0900 UTC), the center of Tropical Storm Marty was located near latitude 20.6 North, longitude 117.0 West. Marty is moving toward the west near 13 mph (20 km/h). A westward motion at a slightly slower forward speed is expected over the next couple of days, followed by a turn to the west-southwest on Thursday. Recent satellite wind data indicate that maximum sustained winds are now near 40 mph (65 km/h) with higher gusts. Continued gradual weakening is expected, and Marty is forecast to weaken to a tropical depression by early Wednesday and degenerate to a remnant low by Wednesday night or Thursday. Tropical-storm-force winds extend outward up to 35 miles (55 km) from the center. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 800 AM PDT. $$ Forecaster Beven
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