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Tropical Depression Ignacio Public Advisory Number 9
2021-08-03 22:36:22| National Hurricane Center (East Pacific)
Issued at 200 PM PDT Tue Aug 03 2021 000 WTPZ35 KNHC 032036 TCPEP5 BULLETIN Tropical Depression Ignacio Advisory Number 9 NWS National Hurricane Center Miami FL EP102021 200 PM PDT Tue Aug 03 2021 ...IGNACIO WEAKENING AND EXPECTED TO BECOME A REMNANT LOW SOON... SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...20.4N 115.7W ABOUT 410 MI...660 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...E OR 90 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 200 PM PDT (2100 UTC), the center of Tropical Depression Ignacio was located near latitude 20.4 North, longitude 115.7 West. The depression is moving toward the east near 3 mph (6 km/h), and this general motion is expected to continue today. A slow motion toward the southeast is forecast tonight, followed by a southward motion on Wednesday. Recent satellite-derived surface wind data indicate that maximum sustained winds have decreased to near 30 mph (45 km/h) with higher gusts. Additional weakening is forecast during the next day or so, and Ignacio is expected to degenerate into a remnant low by tonight, and dissipate by late Wednesday. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 800 PM PDT. $$ Forecaster Stewart
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Tropical Depression Ignacio Forecast Advisory Number 9
2021-08-03 22:36:22| National Hurricane Center (East Pacific)
Issued at 2100 UTC TUE AUG 03 2021 000 WTPZ25 KNHC 032036 TCMEP5 TROPICAL DEPRESSION IGNACIO FORECAST/ADVISORY NUMBER 9 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102021 2100 UTC TUE AUG 03 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 20.4N 115.7W AT 03/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE EAST OR 90 DEGREES AT 3 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1009 MB MAX SUSTAINED WINDS 25 KT WITH GUSTS TO 35 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 20.4N 115.7W AT 03/2100Z AT 03/1800Z CENTER WAS LOCATED NEAR 20.4N 115.8W FORECAST VALID 04/0600Z 20.4N 115.3W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 04/1800Z 19.9N 114.5W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 05/0600Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.4N 115.7W NEXT ADVISORY AT 04/0300Z $$ FORECASTER STEWART
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Tropical Depression Ignacio Wind Speed Probabilities Number 9
2021-08-03 22:36:22| National Hurricane Center (East Pacific)
Issued at 2100 UTC TUE AUG 03 2021 000 FOPZ15 KNHC 032036 PWSEP5 TROPICAL DEPRESSION IGNACIO WIND SPEED PROBABILITIES NUMBER 9 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102021 2100 UTC TUE AUG 03 2021 AT 2100Z THE CENTER OF TROPICAL DEPRESSION IGNACIO WAS LOCATED NEAR LATITUDE 20.4 NORTH...LONGITUDE 115.7 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 25 KTS...30 MPH...45 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 18Z TUE AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 18Z TUE 06Z WED 18Z WED 06Z THU 18Z THU 18Z FRI 18Z SAT PERIODS TO TO TO TO TO TO TO 06Z WED 18Z WED 06Z THU 18Z THU 18Z FRI 18Z SAT 18Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT 20N 115W 34 6 7(13) X(13) X(13) X(13) X(13) X(13) $$ FORECASTER STEWART
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Tropical Storm Hilda Forecast Discussion Number 16
2021-08-03 16:36:40| National Hurricane Center (East Pacific)
Issued at 800 AM PDT Tue Aug 03 2021 000 WTPZ43 KNHC 031436 TCDEP3 Tropical Storm Hilda Discussion Number 16 NWS National Hurricane Center Miami FL EP082021 800 AM PDT Tue Aug 03 2021 There's been little change with the structure of Hilda overnight as deep convection continues to be mostly south of the center due to persistent northeasterly shear. The low-level eye feature in 37 GHz microwave data remains on the latest passes, but it isn't very deep because of the shear. A blend of the T- and CI-numbers from TAFB/SAB, plus the UW-CIMSS SATCON, yields 60 kt as the initial wind speed. Hilda should weaken during the next several days, first primarily due to shear, then cool water temperatures and a more stable environment on Wed-Fri. Model guidance is in good agreement on this scenario, and the latest forecast is close to the previous NHC advisory and the model consensus. Hilda should decay into a remnant low by Friday and dissipate as a trough this weekend well east of the Hawaii. The initial motion estimate, 315/7 kt, is the same as the previous advisory. Hilda is maintaining this motion as it is steered by a mid-level ridge centered over southern California. The global models are consistently building this ridge westward over the eastern Pacific during the next several days as a shortwave trough lifts out along 135W, causing Hilda to turn west-northwestward by Thursday. The only significant forecast difference is how quickly the cyclone moves, mostly in the latter stages, with more of the guidance showing a faster motion, perhaps because the models are showing a weaker Hilda being steered by the quicker low-level flow. The new NHC prediction shows that acceleration at long-range as well, near or just behind the latest model consensus. FORECAST POSITIONS AND MAX WINDS INIT 03/1500Z 17.5N 124.5W 60 KT 70 MPH 12H 04/0000Z 18.2N 125.3W 50 KT 60 MPH 24H 04/1200Z 19.1N 126.4W 45 KT 50 MPH 36H 05/0000Z 19.9N 127.7W 40 KT 45 MPH 48H 05/1200Z 20.8N 129.4W 35 KT 40 MPH 60H 06/0000Z 21.6N 131.4W 30 KT 35 MPH 72H 06/1200Z 22.3N 133.5W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 07/1200Z 23.0N 138.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 120H 08/1200Z...DISSIPATED $$ Forecaster Blake
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Tropical Storm Hilda Wind Speed Probabilities Number 16
2021-08-03 16:34:14| National Hurricane Center (East Pacific)
Issued at 1500 UTC TUE AUG 03 2021 000 FOPZ13 KNHC 031434 PWSEP3 TROPICAL STORM HILDA WIND SPEED PROBABILITIES NUMBER 16 NWS NATIONAL HURRICANE CENTER MIAMI FL EP082021 1500 UTC TUE AUG 03 2021 AT 1500Z THE CENTER OF TROPICAL STORM HILDA WAS LOCATED NEAR LATITUDE 17.5 NORTH...LONGITUDE 124.5 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 60 KTS...70 MPH...110 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 12Z TUE AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 12Z TUE 00Z WED 12Z WED 00Z THU 12Z THU 12Z FRI 12Z SAT PERIODS TO TO TO TO TO TO TO 00Z WED 12Z WED 00Z THU 12Z THU 12Z FRI 12Z SAT 12Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT 20N 125W 34 3 8(11) 1(12) X(12) X(12) X(12) X(12) 20N 130W 34 X 1( 1) 3( 4) 9(13) 3(16) X(16) X(16) $$ FORECASTER BLAKE
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