Category Archives: Hurricane Advisories, Atlantic

Atlantic Hurricane Advisories

Post-Tropical Cyclone ARLENE Forecast Discussion Number 9 2017-04-21 10:35:04

1492785304
Issued at 1100 AM AST Fri Apr 21 2017


000
WTNT41 KNHC 211434
TCDAT1

Post-Tropical Cyclone Arlene Discussion Number   9
NWS National Hurricane Center Miami FL       AL012017
1100 AM AST Fri Apr 21 2017

Arlene has become embedded within the circulation of a large
extratropical cyclone, and lost most of its deep convection while
surrounded by cold air. The post-tropical cyclone will move toward
the southwest and south at about 20 kt until dissipation later
today.

This is the last advisory on Arlene. 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.


FORECAST POSITIONS AND MAX WINDS

INIT  21/1500Z 39.3N  49.9W   45 KT  50 MPH...POST-TROPICAL
 12H  22/0000Z 37.5N  51.5W   40 KT  45 MPH...POST-TROP/EXTRATROP
 24H  22/1200Z...DISSIPATED

$$
Forecaster Avila

http://www.nhc.noaa.gov/text/refresh/MIATCDAT1+shtml/211434.shtml

Post-Tropical Cyclone ARLENE Forecast Discussion Number 9 2017-04-21 10:34:13

1492785253
Issued at 1100 AM AST Fri Apr 21 2017

ZCZC MIATCDAT1 ALL
TTAA00 KNHC DDHHMM

Post-Tropical Cyclone Arlene Discussion Number   9
NWS National Hurricane Center Miami FL       AL012017
1100 AM AST Fri Apr 21 2017

Arlene has become embedded within the circulation of a large
extratropical cyclone, and lost most of its deep convection while
surrounded by cold air. The post-tropical cyclone will move toward
the southwest and south at about 20 kt until dissipation later
today.

This is the last advisory on Arlene. 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.


FORECAST POSITIONS AND MAX WINDS

INIT  21/1500Z 39.3N  49.9W   45 KT  50 MPH...POST-TROPICAL
 12H  22/0000Z 37.5N  51.5W   40 KT  45 MPH...POST-TROP/EXTRATROP
 24H  22/1200Z...DISSIPATED

$$
Forecaster Avila

NNNN

http://www.nhc.noaa.gov/text/refresh/MIATCDAT1+shtml/DDHHMM.shtml

Post-Tropical Cyclone ARLENE Forecast Advisory Number 9 2017-04-21 10:34:04

1492785244
Issued at 1500 UTC FRI APR 21 2017


000
WTNT21 KNHC 211433
TCMAT1

POST-TROPICAL CYCLONE ARLENE FORECAST/ADVISORY NUMBER   9
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL012017
1500 UTC FRI APR 21 2017

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

POST-TROPICAL CYCLONE CENTER LOCATED NEAR 39.3N  49.9W AT 21/1500Z
POSITION ACCURATE WITHIN  30 NM

PRESENT MOVEMENT TOWARD THE SOUTHWEST OR 220 DEGREES AT  20 KT

ESTIMATED MINIMUM CENTRAL PRESSURE  995 MB
MAX SUSTAINED WINDS  45 KT WITH GUSTS TO  55 KT.
34 KT.......200NE 100SE   0SW 120NW.
12 FT SEAS..300NE 220SE 100SW 170NW.
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 39.3N  49.9W AT 21/1500Z
AT 21/1200Z CENTER WAS LOCATED NEAR 39.9N  49.3W

FORECAST VALID 22/0000Z 37.5N  51.5W...POST-TROP/EXTRATROP
MAX WIND  40 KT...GUSTS  50 KT.
34 KT...90NE  90SE  90SW 150NW.

FORECAST VALID 22/1200Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 39.3N  49.9W

THIS IS THE LAST FORECAST/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


http://www.nhc.noaa.gov/text/refresh/MIATCMAT1+shtml/211433.shtml

Post-Tropical Cyclone ARLENE Public Advisory Number 9 2017-04-21 10:34:04

1492785244
Issued at 1100 AM AST Fri Apr 21 2017


000
WTNT31 KNHC 211433
TCPAT1

BULLETIN
Post-Tropical Cyclone Arlene Advisory Number   9
NWS National Hurricane Center Miami FL       AL012017
1100 AM AST Fri Apr 21 2017

...ARLENE MERGES WITH A LARGE EXTRATROPICAL CYCLONE...
...THIS IS THE LAST ADVISORY...


SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...39.3N 49.9W
ABOUT 1235 MI...1985 KM W OF THE AZORES
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...SW OR 220 DEGREES AT 23 MPH...37 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.39 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
Arlene was located near latitude 39.3 North, longitude 49.9 West.
The post-tropical cyclone is moving toward the southwest near 23 mph
(37 km/h), and this general motion is expected to continue until
dissipation.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
The post-tropical cyclone is forecast to dissipate later
today.

Tropical-storm-force winds extend outward up to 230 miles (370 km)
from the center.

The estimated minimum central pressure is 995 mb (29.39 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, WMO header FZNT01 KWBC, and available
on the Web at http://www.opc.ncep.noaa.gov/shtml/NFDHSFAT1.shtml.

$$
Forecaster Avila

http://www.nhc.noaa.gov/text/refresh/MIATCPAT1+shtml/211433.shtml

Summary for Post-Tropical Cyclone ARLENE (AT1/AL012017) 2017-04-21 10:34:04

1492785244
…ARLENE MERGES WITH A LARGE EXTRATROPICAL CYCLONE… …THIS IS THE LAST ADVISORY…
As of 11:00 AM AST Fri Apr 21
the center of ARLENE was located near 39.3, -49.9
with movement SW at 23 mph.
The minimum central pressure was 995 mb
with maximum sustained winds of about 50 mph.

http://www.nhc.noaa.gov/text/refresh/MIATCPAT1+shtml/211433.shtml