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Summary for Post-Tropical Cyclone BERTHA (AT3/AL032014)
2014-08-06 16:34:40| National Hurricane Center (Atlantic)
...BERTHA ACQUIRED EXTRATROPICAL CHARACTERISTICS... ...THIS IS THE LAST ADVISORY... As of 11:00 AM AST Wed Aug 6 the center of BERTHA was located near 40.2, -62.7 with movement NE at 31 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 50 mph.
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Post-Tropical Cyclone BERTHA Public Advisory Number 23
2014-08-06 16:34:40| National Hurricane Center (Atlantic)
Issued at 1100 AM AST WED AUG 06 2014 000 WTNT33 KNHC 061434 TCPAT3 BULLETIN POST-TROPICAL CYCLONE BERTHA ADVISORY NUMBER 23 NWS NATIONAL HURRICANE CENTER MIAMI FL AL032014 1100 AM AST WED AUG 06 2014 ...BERTHA ACQUIRED EXTRATROPICAL CHARACTERISTICS... ...THIS IS THE LAST ADVISORY... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...40.2N 62.7W ABOUT 305 MI...495 KM S OF HALIFAX NOVA SCOTIA ABOUT 655 MI...1060 KM SW OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NE OR 55 DEGREES AT 31 MPH...50 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 1100 AM AST...1500 UTC...THE CENTER OF POST-TROPICAL CYCLONE BERTHA WAS ESTIMATED NEAR LATITUDE 40.2 NORTH...LONGITUDE 62.7 WEST. THE POST-TROPICAL CYCLONE IS MOVING TOWARD THE NORTHEAST NEAR 31 MPH ...50 KM/H...AND THIS MOTION IS EXPECTED TO CONTINUE DURING THE NEXT DAY OR TWO. MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH...85 KM/H...WITH HIGHER GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST DURING THE NEXT 48 HOURS. GALE FORCE WINDS EXTEND OUTWARD UP TO 140 MILES...220 KM TO THE SOUTH OF THE CENTER. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1006 MB...29.71 INCHES. HAZARDS AFFECTING LAND ---------------------- NONE NEXT ADVISORY ------------- THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON THIS SYSTEM. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. $$ FORECASTER AVILA
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Post-Tropical Cyclone BERTHA Forecast Advisory Number 23
2014-08-06 16:34:12| National Hurricane Center (Atlantic)
Issued at 1500 UTC WED AUG 06 2014 000 WTNT23 KNHC 061434 TCMAT3 POST-TROPICAL CYCLONE BERTHA FORECAST/ADVISORY NUMBER 23 NWS NATIONAL HURRICANE CENTER MIAMI FL AL032014 1500 UTC WED AUG 06 2014 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. POST-TROPICAL CYCLONE CENTER LOCATED NEAR 40.2N 62.7W AT 06/1500Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE NORTHEAST OR 55 DEGREES AT 27 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT.......100NE 120SE 0SW 0NW. 12 FT SEAS.. 60NE 150SE 180SW 60NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 40.2N 62.7W AT 06/1500Z AT 06/1200Z CENTER WAS LOCATED NEAR 39.4N 64.1W FORECAST VALID 07/0000Z 42.3N 58.1W...POST-TROP/EXTRATROP MAX WIND 45 KT...GUSTS 55 KT. 34 KT...120NE 120SE 0SW 0NW. FORECAST VALID 07/1200Z 45.0N 52.5W...POST-TROP/EXTRATROP MAX WIND 40 KT...GUSTS 50 KT. 34 KT...120NE 180SE 60SW 0NW. FORECAST VALID 08/0000Z 47.5N 46.0W...POST-TROP/EXTRATROP MAX WIND 40 KT...GUSTS 50 KT. 34 KT...120NE 240SE 120SW 0NW. FORECAST VALID 08/1200Z 48.5N 40.0W...POST-TROP/EXTRATROP MAX WIND 40 KT...GUSTS 50 KT. 34 KT...120NE 240SE 120SW 120NW. FORECAST VALID 09/1200Z 48.0N 26.0W...POST-TROP/EXTRATROP MAX WIND 35 KT...GUSTS 45 KT. 34 KT...180NE 240SE 240SW 180NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 10/1200Z 48.5N 8.5W...POST-TROP/EXTRATROP MAX WIND 35 KT...GUSTS 45 KT. OUTLOOK VALID 11/1200Z...ABSORBED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 40.2N 62.7W THIS IS THE LAST FORECAST/ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON THIS SYSTEM $$ FORECASTER AVILA
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Tropical Storm BERTHA Graphics
2014-08-06 11:14:06| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Wed, 06 Aug 2014 08:36:25 GMT Wind Speed Probabilities last updated Wed, 06 Aug 2014 09:07:48 GMT
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Tropical Storm BERTHA Forecast Discussion Number 22
2014-08-06 10:46:05| National Hurricane Center (Atlantic)
Issued at 500 AM AST WED AUG 06 2014 000 WTNT43 KNHC 060846 TCDAT3 TROPICAL STORM BERTHA DISCUSSION NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL032014 500 AM AST WED AUG 06 2014 Deep convection continues to pulse downshear of the center of Bertha, as the tropical cyclone is situated in a favorable region for forced ascent in the equatorward entrance region of an upper- level jet streak. The initial intensity remains 45 kt based on the Dvorak classification from TAFB and an earlier ASCAT pass that showed some 40-45 kt winds east of the center. As Bertha becomes embedded in the jet, the vertical shear will increase in the next 12 to 24 hours. This should result in the low-level circulation decoupling from the convection while the cyclone becomes embedded in a baroclinic zone. Bertha should be post-tropical by 24 hours, and then gradually decay as an extratropical cyclone. Bertha is expected to be absorbed by day 5, although this could occur sooner. The latest satellite fixes indicate an initial motion of 055/24. Bertha is well embedded in deep-layer southwesterly flow ahead of a mid-latitude trough, and will continue moving northeastward over the north Atlantic for the next day or so before turning eastward by 72 hours. The new NHC track is largely an update of the previous one, and is close to guidance provided by the NOAA Ocean Prediction Center. FORECAST POSITIONS AND MAX WINDS INIT 06/0900Z 39.0N 65.4W 45 KT 50 MPH 12H 06/1800Z 40.8N 61.7W 45 KT 50 MPH 24H 07/0600Z 43.6N 55.7W 40 KT 45 MPH...POST-TROP/EXTRATROP 36H 07/1800Z 46.0N 49.9W 40 KT 45 MPH...POST-TROP/EXTRATROP 48H 08/0600Z 48.0N 44.0W 40 KT 45 MPH...POST-TROP/EXTRATROP 72H 09/0600Z 48.5N 28.0W 35 KT 40 MPH...POST-TROP/EXTRATROP 96H 10/0600Z 48.5N 12.5W 35 KT 40 MPH...POST-TROP/EXTRATROP 120H 11/0600Z...ABSORBED $$ Forecaster Brennan
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