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Summary for Tropical Storm Debby (AT4/AL042018)
2018-08-09 10:36:19| National Hurricane Center (Atlantic)
...DEBBY BEGINNING TO ACCELERATE NORTHEASTWARD OVER THE COLD WATERS OF THE FAR NORTH ATLANTIC... As of 5:00 AM AST Thu Aug 9 the center of Debby was located near 43.6, -45.1 with movement NE at 17 mph. The minimum central pressure was 1002 mb with maximum sustained winds of about 45 mph.
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Tropical Storm Debby Public Advisory Number 8
2018-08-09 10:36:19| National Hurricane Center (Atlantic)
Issued at 500 AM AST Thu Aug 09 2018 978 WTNT34 KNHC 090836 TCPAT4 BULLETIN Tropical Storm Debby Advisory Number 8 NWS National Hurricane Center Miami FL AL042018 500 AM AST Thu Aug 09 2018 ...DEBBY BEGINNING TO ACCELERATE NORTHEASTWARD OVER THE COLD WATERS OF THE FAR NORTH ATLANTIC... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...43.6N 45.1W ABOUT 1020 MI...1640 KM WNW OF THE AZORES MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NE OR 55 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Tropical Storm Debby was located near latitude 43.6 North, longitude 45.1 West. Debby is moving toward the northeast near 17 mph (28 km/h), and this motion with a further increase in forward speed is expected until the storm dissipates in another day or so. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. Gradual weakening is forecast, and Debby could become an extratropical cyclone this afternoon or evening before dissipating on Friday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 1002 mb (29.59 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Stewart
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Tropical Storm Debby Forecast Advisory Number 8
2018-08-09 10:36:19| National Hurricane Center (Atlantic)
Issued at 0900 UTC THU AUG 09 2018 979 WTNT24 KNHC 090836 TCMAT4 TROPICAL STORM DEBBY FORECAST/ADVISORY NUMBER 8 NWS NATIONAL HURRICANE CENTER MIAMI FL AL042018 0900 UTC THU AUG 09 2018 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 43.6N 45.1W AT 09/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHEAST OR 55 DEGREES AT 15 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1002 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 30NE 60SE 0SW 0NW. 12 FT SEAS..180NE 90SE 0SW 0NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 43.6N 45.1W AT 09/0900Z AT 09/0600Z CENTER WAS LOCATED NEAR 43.2N 46.0W FORECAST VALID 09/1800Z 45.4N 41.4W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 60SE 0SW 0NW. FORECAST VALID 10/0600Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 43.6N 45.1W NEXT ADVISORY AT 09/1500Z $$ FORECASTER STEWART
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Tropical Storm Debby Forecast Advisory Number 7
2018-08-09 04:51:15| National Hurricane Center (Atlantic)
Issued at 0300 UTC THU AUG 09 2018 128 WTNT24 KNHC 090250 CCA TCMAT4 TROPICAL STORM DEBBY FORECAST/ADVISORY NUMBER 7...CORRECTED NWS NATIONAL HURRICANE CENTER MIAMI FL AL042018 0300 UTC THU AUG 09 2018 CORRECTED FOR INITIAL WIND GUSTS THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL STORM CENTER LOCATED NEAR 42.8N 46.5W AT 09/0300Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHEAST OR 40 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1000 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT....... 30NE 60SE 0SW 0NW. 12 FT SEAS..180NE 0SE 0SW 0NW. 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 42.8N 46.5W AT 09/0300Z AT 09/0000Z CENTER WAS LOCATED NEAR 42.4N 47.0W FORECAST VALID 09/1200Z 44.4N 43.7W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 0NE 60SE 0SW 0NW. FORECAST VALID 10/0000Z 46.8N 37.7W...POST-TROP/EXTRATROP MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 60SE 0SW 0NW. FORECAST VALID 10/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 42.8N 46.5W NEXT ADVISORY AT 09/0900Z $$ FORECASTER CANGIALOSI
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Tropical Storm Debby Forecast Discussion Number 7
2018-08-09 04:41:17| National Hurricane Center (Atlantic)
Issued at 1100 PM AST Wed Aug 08 2018 190 WTNT44 KNHC 090241 TCDAT4 Tropical Storm Debby Discussion Number 7 NWS National Hurricane Center Miami FL AL042018 1100 PM AST Wed Aug 08 2018 A very recent ASCAT pass indicates that Debby is stronger than previously estimated. The pass showed maximum winds of about 40 kt, and since the entire circulation was not captured, the initial intensity is set at 45 kt. This estimate is also in agreement with a Dvorak CI-number from TAFB. Although the relatively compact tropical storm is maintaining an area of moderate convection, the thunderstorm activity is displaced to the south-southwest of the center due to about 15 kt of wind shear. Debby is currently over fairly cool 25 deg C SSTs, but it will be headed for much cooler water during the next 24 to 36 hours. These unfavorable oceanic conditions combined with an increasingly stable airmass should cause weakening and extratropical transition. The NHC intensity forecast shows Debby becoming extratropical by 24 hours and dissipating shortly thereafter, following the GFS and ECMWF models. The tropical storm is moving northeastward, or 040 degrees, at 13 kt. A faster northeastward motion is expected until the cyclone opens into a trough as Debby becomes more embedded in the mid-latitude flow. The NHC track forecast lies near the middle of the guidance envelope. FORECAST POSITIONS AND MAX WINDS INIT 09/0300Z 42.8N 46.5W 45 KT 50 MPH 12H 09/1200Z 44.4N 43.7W 40 KT 45 MPH 24H 10/0000Z 46.8N 37.7W 35 KT 40 MPH...POST-TROP/EXTRATROP 36H 10/1200Z...DISSIPATED $$ Forecaster Cangialosi
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