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Tropical Depression Fifteen-E Forecast Discussion Number 1
2018-08-26 10:42:24| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Sun Aug 26 2018 276 WTPZ45 KNHC 260842 TCDEP5 Tropical Depression Fifteen-E Discussion Number 1 NWS National Hurricane Center Miami FL EP152018 200 AM PDT Sun Aug 26 2018 Various satellite data over the past several hours, including recent ASCAT scatterometer surface-wind data, indicate that the well-defined low pressure area located about 1000 nmi southwest of the southern tip of the Baja California peninsula has become much better organized, and has developed into a tropical depression. A small CDO-like feature has formed over the well-defined center depicted in the ASCAT data, and a recent burst of cold cloud tops of -80C have also developed just west of the center. The initial intensity of 30 kt is based on 0458Z and 0558Z ASCAT wind data, which indicated winds of 28-30 kt were located 35-40 nmi west and southwest of the low-level center. The initial motion estimate is 280/10 kt. The depression is expected to remain south of a strong deep-layer subtropical ridge for the next 96 hours, resulting in a general westward motion at a slightly faster forward speed. By day 5, the cyclone is forecast to move into a break in the ridge created by a broad mid-/upper-level trough that is forecast to dig southward out of the northern Pacific between 140W-145W longitude. The forecast track lies essentially down the middle of the guidance envelope, which is just north of the consensus model TVCE and the GFS model, but south of the ECMWF and UKMET models. The HRWF and HMON models were not being available for the TVCE consensus on this cycle, so some significant adjustments to the track in the next advisory may be required. The cyclone has a radius of maximum winds (RMW) of 35-40 nmi based on the recent ASCAT data. The combination of the modest RMW, low vertical wind shear of less than 10 kt, a very moist mid-level environment, and sea-surface temperatures above 28 deg C, favors steady intensification and even the possibility of rapid strengthening. Since this is the first forecast, however, the intensity forecast is on the conservative side and calls for a climatological increase of one T-number or 20 kt every 24 h for the next 48 hours, which is above all of the intensity guidance except for the Navy COAMPS (CTCI) model. By 96-120 hours, the intensity is leveled off due to possible entrainment of drier air and an increase in southwesterly vertical wind shear. FORECAST POSITIONS AND MAX WINDS INIT 26/0900Z 13.3N 124.1W 30 KT 35 MPH 12H 26/1800Z 13.5N 126.0W 40 KT 45 MPH 24H 27/0600Z 13.7N 128.4W 50 KT 60 MPH 36H 27/1800Z 13.9N 130.6W 60 KT 70 MPH 48H 28/0600Z 14.1N 132.6W 70 KT 80 MPH 72H 29/0600Z 14.3N 136.6W 80 KT 90 MPH 96H 30/0600Z 14.9N 140.1W 90 KT 105 MPH 120H 31/0600Z 17.4N 141.9W 90 KT 105 MPH $$ Forecaster Stewart
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Summary for Tropical Depression Fifteen-E (EP5/EP152018)
2018-08-26 10:38:55| National Hurricane Center (East Pacific)
...NEW DEPRESSION FORMS WELL TO THE SOUTHWEST OF BAJA CALIFORNIA... ...NO THREAT TO ANY LAND AREAS... As of 2:00 AM PDT Sun Aug 26 the center of Fifteen-E was located near 13.3, -124.1 with movement W at 14 mph. The minimum central pressure was 1008 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Fifteen-E Public Advisory Number 1
2018-08-26 10:38:55| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Sun Aug 26 2018 793 WTPZ35 KNHC 260838 TCPEP5 BULLETIN Tropical Depression Fifteen-E Advisory Number 1 NWS National Hurricane Center Miami FL EP152018 200 AM PDT Sun Aug 26 2018 ...NEW DEPRESSION FORMS WELL TO THE SOUTHWEST OF BAJA CALIFORNIA... ...NO THREAT TO ANY LAND AREAS... SUMMARY OF 200 AM PDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...13.3N 124.1W ABOUT 1140 MI...1840 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 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 newly formed Tropical Depression Fifteen-E was located near latitude 13.3 North, longitude 124.1 West. The depression is moving toward the west near 14 mph (22 km/h), and this general motion is expected to continue for the next few days. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Strengthening is forecast during the next 72 hours. The depression is expected to become a tropical storm later today and reach hurricane strength by Tuesday. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 800 AM PDT. $$ Forecaster Stewart
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Tropical Depression Fifteen-E Wind Speed Probabilities Number 1
2018-08-26 10:38:55| National Hurricane Center (East Pacific)
Issued at 0900 UTC SUN AUG 26 2018 795 FOPZ15 KNHC 260838 PWSEP5 TROPICAL DEPRESSION FIFTEEN-E WIND SPEED PROBABILITIES NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL EP152018 0900 UTC SUN AUG 26 2018 AT 0900Z THE CENTER OF TROPICAL DEPRESSION FIFTEEN-E WAS LOCATED NEAR LATITUDE 13.3 NORTH...LONGITUDE 124.1 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 30 KTS...35 MPH...55 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 06Z SUN 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 06Z SUN 18Z SUN 06Z MON 18Z MON 06Z TUE 06Z WED 06Z THU PERIODS TO TO TO TO TO TO TO 18Z SUN 06Z MON 18Z MON 06Z TUE 06Z WED 06Z THU 06Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT 15N 125W 34 3 1( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) 10N 130W 34 X 2( 2) 3( 5) 1( 6) 1( 7) X( 7) X( 7) 15N 130W 34 X 9( 9) 45(54) 5(59) 1(60) X(60) X(60) 15N 130W 50 X X( X) 12(12) 3(15) X(15) X(15) X(15) 15N 130W 64 X X( X) 2( 2) 1( 3) 1( 4) X( 4) X( 4) 10N 135W 34 X X( X) X( X) 2( 2) 5( 7) 2( 9) 1(10) 15N 135W 34 X X( X) 3( 3) 17(20) 52(72) 3(75) 1(76) 15N 135W 50 X X( X) X( X) 3( 3) 37(40) 3(43) X(43) 15N 135W 64 X X( X) X( X) 1( 1) 18(19) 2(21) X(21) 20N 135W 34 X X( X) X( X) X( X) 3( 3) 1( 4) 3( 7) 10N 140W 34 X X( X) X( X) X( X) 1( 1) 6( 7) 5(12) 10N 140W 50 X X( X) X( X) X( X) X( X) 2( 2) X( 2) 10N 140W 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) 15N 140W 34 X X( X) X( X) X( X) 14(14) 36(50) 10(60) 15N 140W 50 X X( X) X( X) X( X) 3( 3) 20(23) 7(30) 15N 140W 64 X X( X) X( X) X( X) 1( 1) 10(11) 4(15) 20N 140W 34 X X( X) X( X) X( X) 1( 1) 5( 6) 13(19) 20N 140W 50 X X( X) X( X) X( X) X( X) 1( 1) 4( 5) 20N 140W 64 X X( X) X( X) X( X) X( X) 1( 1) 1( 2) 25N 140W 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) 10N 145W 34 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) 15N 145W 34 X X( X) X( X) X( X) X( X) 10(10) 12(22) 15N 145W 50 X X( X) X( X) X( X) X( X) 3( 3) 4( 7) 15N 145W 64 X X( X) X( X) X( X) X( X) 1( 1) 2( 3) 20N 145W 34 X X( X) X( X) X( X) X( X) 3( 3) 14(17) 20N 145W 50 X X( X) X( X) X( X) X( X) X( X) 7( 7) 20N 145W 64 X X( X) X( X) X( X) X( X) X( X) 3( 3) 25N 145W 34 X X( X) X( X) X( X) X( X) X( X) 4( 4) 20N 150W 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) $$ FORECASTER STEWART
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Tropical Depression Fifteen-E Forecast Advisory Number 1
2018-08-26 10:38:24| National Hurricane Center (East Pacific)
Issued at 0900 UTC SUN AUG 26 2018 611 WTPZ25 KNHC 260838 TCMEP5 TROPICAL DEPRESSION FIFTEEN-E FORECAST/ADVISORY NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL EP152018 0900 UTC SUN AUG 26 2018 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 13.3N 124.1W AT 26/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 12 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 13.3N 124.1W AT 26/0900Z AT 26/0600Z CENTER WAS LOCATED NEAR 13.2N 123.6W FORECAST VALID 26/1800Z 13.5N 126.0W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 30NE 0SE 0SW 30NW. FORECAST VALID 27/0600Z 13.7N 128.4W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 40NE 20SE 20SW 40NW. FORECAST VALID 27/1800Z 13.9N 130.6W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 30NE 20SE 0SW 30NW. 34 KT... 60NE 40SE 30SW 60NW. FORECAST VALID 28/0600Z 14.1N 132.6W MAX WIND 70 KT...GUSTS 85 KT. 64 KT... 15NE 0SE 0SW 15NW. 50 KT... 30NE 30SE 20SW 30NW. 34 KT... 70NE 50SE 40SW 70NW. FORECAST VALID 29/0600Z 14.3N 136.6W MAX WIND 80 KT...GUSTS 100 KT. 50 KT... 40NE 30SE 20SW 40NW. 34 KT... 80NE 70SE 50SW 80NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM ON DAY 4 AND 150 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 30/0600Z 14.9N 140.1W MAX WIND 90 KT...GUSTS 110 KT. OUTLOOK VALID 31/0600Z 17.4N 141.9W MAX WIND 90 KT...GUSTS 110 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.3N 124.1W NEXT ADVISORY AT 26/1500Z $$ FORECASTER STEWART
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