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Hurricane GASTON Graphics

2016-08-31 11:13:15| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Wed, 31 Aug 2016 08:51:34 GMT Wind Speed Probabilities last updated Wed, 31 Aug 2016 09:07:40 GMT

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Hurricane GASTON Forecast Discussion Number 35

2016-08-31 10:52:43| National Hurricane Center (Atlantic)

Issued at 500 AM AST WED AUG 31 2016 000 WTNT42 KNHC 310851 TCDAT2 HURRICANE GASTON DISCUSSION NUMBER 35 NWS NATIONAL HURRICANE CENTER MIAMI FL AL072016 500 AM AST WED AUG 31 2016 Gaston's satellite presentation continues to be outstanding. It consists of a large and clear eye surrounded by rings of very deep convection. Dvorak intensity estimates have remained steady and still support and initial intensity of 105 kt. Gaston is over warm waters and the shear is expected to increase just a little during the next day or two. Consequently, only a slight weakening is anticipated during the the day or so. After that time, Gaston should encounter cooler waters resulting in a faster weakening. By the end of the forecast period, Gaston should become absorbed by another extratropical cyclone. The NHC intensity forecast is very similar to the previous one. The initial motion is 050/8 kt. Gaston is already embedded in the mid-latitude westerlies, and this pattern should steer the hurricane toward the northeast and east-northeast with a gradual increase in forward speed. By day 3, the cyclone should reduce its forward speed once it begins to interact with a separate extratropical cyclone. No significant adjustments were made to the previous NHC track forecast and it continues to be close to the multi-model consensus TVCN. Gaston continues to move in the direction of the Azores, and all interests in these islands should monitor the progress of this cyclone. FORECAST POSITIONS AND MAX WINDS INIT 31/0900Z 33.4N 50.2W 105 KT 120 MPH 12H 31/1800Z 34.5N 48.2W 105 KT 120 MPH 24H 01/0600Z 36.3N 44.5W 95 KT 110 MPH 36H 01/1800Z 37.5N 40.0W 85 KT 100 MPH 48H 02/0600Z 38.5N 35.0W 70 KT 80 MPH 72H 03/0600Z 39.5N 28.0W 45 KT 50 MPH 96H 04/0600Z 41.5N 22.0W 30 KT 35 MPH...POST-TROPICAL 120H 05/0600Z...DISSIPATED $$ Forecaster Avila

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Hurricane GASTON Wind Speed Probabilities Number 35

2016-08-31 10:51:35| National Hurricane Center (Atlantic)

Issued at 0900 UTC WED AUG 31 2016 000 FONT12 KNHC 310851 PWSAT2 HURRICANE GASTON WIND SPEED PROBABILITIES NUMBER 35 NWS NATIONAL HURRICANE CENTER MIAMI FL AL072016 0900 UTC WED AUG 31 2016 AT 0900Z THE CENTER OF HURRICANE GASTON WAS LOCATED NEAR LATITUDE 33.4 NORTH...LONGITUDE 50.2 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 105 KTS...120 MPH...195 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 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 WED 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 64 KT ARE SHOWN WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 06Z WED 18Z WED 06Z THU 18Z THU 06Z FRI 06Z SAT 06Z SUN PERIODS TO TO TO TO TO TO TO 18Z WED 06Z THU 18Z THU 06Z FRI 06Z SAT 06Z SUN 06Z MON FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT SANTA CRUZ AZO 34 X X( X) X( X) 18(18) 34(52) 1(53) X(53) SANTA CRUZ AZO 50 X X( X) X( X) 3( 3) 15(18) X(18) X(18) SANTA CRUZ AZO 64 X X( X) X( X) 1( 1) 4( 5) X( 5) X( 5) PONTA DELGADA 34 X X( X) X( X) X( X) 15(15) 5(20) X(20) $$ FORECASTER AVILA

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Summary for Hurricane GASTON (AT2/AL072016)

2016-08-31 10:51:01| National Hurricane Center (Atlantic)

...GASTON OVER THE NORTH-CENTRAL ATLANTIC WITH 120 MPH WINDS... As of 5:00 AM AST Wed Aug 31 the center of GASTON was located near 33.4, -50.2 with movement NE at 9 mph. The minimum central pressure was 956 mb with maximum sustained winds of about 120 mph.

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Hurricane GASTON Public Advisory Number 35

2016-08-31 10:51:01| National Hurricane Center (Atlantic)

Issued at 500 AM AST WED AUG 31 2016 000 WTNT32 KNHC 310850 TCPAT2 BULLETIN HURRICANE GASTON ADVISORY NUMBER 35 NWS NATIONAL HURRICANE CENTER MIAMI FL AL072016 500 AM AST WED AUG 31 2016 ...GASTON OVER THE NORTH-CENTRAL ATLANTIC WITH 120 MPH WINDS... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...33.4N 50.2W ABOUT 850 MI...1365 KM E OF BERMUDA ABOUT 1335 MI...2150 KM W OF THE AZORES MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...NE OR 50 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...956 MB...28.23 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. Interests in the Azores should monitor the progress of Gaston. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 500 AM AST (0900 UTC), the well-defined eye of Hurricane Gaston was located near latitude 33.4 North, longitude 50.2 West. Gaston is moving toward the northeast near 9 mph (15 km/h). An east-northeastward or northeastward motion with an increase in forward speed is expected during the next couple of days. Maximum sustained winds remain near 120 mph (195 km/h) with higher gusts. Gaston is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Little change in strength is expected today, but weakening should begin tonight or early Thursday. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 160 miles (260 km). The estimated minimum central pressure is 956 mb (28.23 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Avila

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