ATTENTION: The NHC has issued it's last advisory on Gamma as of 10-6-2020. All Graphics and Information on this page will eventually cease to update.
NHC Important Links:
NHC Discussion / NHC Public Advisory / NHC Forecast / Wind Probs / Storm Archive
Storm Tracking Important Links:
FSU Track Probability - NOAA Tracker - Albany Tracker - Navy NRL Page - HFIP Products - TropicalAtlantic Tracker - NCAR Guidance Page - CyclonicWX Tracker Products - CIMSS Tracker - TropicalTidbits Tracker - UWM Tracker - SFWMD Models
NRL Floater

Additional RAMMB Sat - Model Data - Wind Products
NOAA NESDIS Floaters
Other Floaters:
TropicalTidbits - WeatherNerds - GOES16

Additional RAMMB Sat - Model Data - Wind Products
NOAA NESDIS Floaters


Other Floaters:
TropicalTidbits - WeatherNerds - GOES16
- Sun, 15 Nov 2020 14:30:49 +0000: Atlantic Post-Tropical Cyclone Theta Advisory Number 23 - Atlantic Post-Tropical Cyclone Theta Advisory Number 23
000
WTNT35 KNHC 151430
TCPAT5
BULLETIN
Post-Tropical Cyclone Theta Advisory Number 23
NWS National Hurricane Center Miami FL AL302020
300 PM GMT Sun Nov 15 2020
...THETA BECOMES A REMNANT LOW...
...THIS IS THE LAST ADVISORY...
SUMMARY OF 300 PM GMT...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...31.5N 18.2W
ABOUT 670 MI...1080 KM SE OF THE AZORES
MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H
PRESENT MOVEMENT...N OR 360 DEGREES AT 2 MPH...4 KM/H
MINIMUM CENTRAL PRESSURE...1010 MB...29.83 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 300 PM GMT (1500 UTC), the center of Post-Tropical Cyclone Theta
was located near latitude 31.5 North, longitude 18.2 West. The
post-tropical cyclone is moving toward the north near 2 mph (4 km/h)
and a faster north or north-northeast motion is forecast for a day
or two until the low dissipates.
Maximum sustained winds are near 30 mph (45 km/h) with higher gusts.
The low should gradually decay and dissipate by Tuesday.
The estimated minimum central pressure is 1010 mb (29.83 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 UK Met Office under WMO
header FQNT21 EGRR and on the web at
metoffice.gov.uk/weather/specialist-forecasts/coast-and-sea/high-
seas-forecast/.
$$
Forecaster Blake
- Tue, 06 Oct 2020 02:31:10 +0000: Atlantic Post-Tropical Cyclone GAMMA Forecast/Advi... - Atlantic Post-Tropical Cyclone GAMMA Forecast/Advisory Number 15 NWS NATIONAL Hurricane CENTER MIAMI FL AL252020 0300 UTC TUE OCT 06 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. POST-TROPICAL Cyclone CENTER LOCATED NEAR 21.6N 88.4W AT 06/0300Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE SOUTHWEST OR 220 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. 12 FT SEAS.. 90NE 0SE 120SW 270NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 21.6N 88.4W AT 06/0300Z AT 06/0000Z CENTER WAS LOCATED NEAR 21.9N 88.2W FORECAST VALID 06/1200Z 21.1N 88.9W...POST-TROP/INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 07/0000Z 20.2N 89.6W...POST-TROP/INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 07/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N 88.4W THIS IS THE LAST FORECAST/Advisory ISSUED BY THE NATIONAL HURRICANE CENTER ON THIS SYSTEM ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. $$ FORECASTER ZELINSKY
000
WTNT25 KNHC 060231
TCMAT5
POST-TROPICAL CYCLONE GAMMA FORECAST/ADVISORY NUMBER 15
NWS NATIONAL HURRICANE CENTER MIAMI FL AL252020
0300 UTC TUE OCT 06 2020
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.
POST-TROPICAL CYCLONE CENTER LOCATED NEAR 21.6N 88.4W AT 06/0300Z
POSITION ACCURATE WITHIN 30 NM
PRESENT MOVEMENT TOWARD THE SOUTHWEST OR 220 DEGREES AT 5 KT
ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
12 FT SEAS.. 90NE 0SE 120SW 270NW.
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 21.6N 88.4W AT 06/0300Z
AT 06/0000Z CENTER WAS LOCATED NEAR 21.9N 88.2W
FORECAST VALID 06/1200Z 21.1N 88.9W...POST-TROP/INLAND
MAX WIND 30 KT...GUSTS 40 KT.
FORECAST VALID 07/0000Z 20.2N 89.6W...POST-TROP/INLAND
MAX WIND 25 KT...GUSTS 35 KT.
FORECAST VALID 07/1200Z...DISSIPATED
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N 88.4W
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 ZELINSKY
- Tue, 06 Oct 2020 02:31:40 +0000: Atlantic Post-Tropical Cyclone Gamma Discussion Number 15 - Atlantic Post-Tropical Cyclone Gamma Discussion Number 15
000
WTNT45 KNHC 060231
TCDAT5
Post-Tropical Cyclone Gamma Discussion Number 15
NWS National Hurricane Center Miami FL AL252020
1000 PM CDT Mon Oct 05 2020
Gamma was entirely devoid of convection for most of the day. Shortly
before sunset, a few disorganized thunderstorms developed to the
southeast of the cyclone's center, however these appear to be forced
at least in part by a sea breeze boundary and are not exclusively
associated with Gamma. A few other small cells of convection have
developed to the west of Gamma's center during the past hour or so,
but not nearly enough to be considered sufficiently organized to
meet the requirement for a tropical cyclone. Gamma is therefore now
considered to be post-tropical and this will be the last NHC
advisory.
The cyclone could still produce some additional disorganized
convection and periods of heavy rain overnight as it moves inland
over the Yucatan peninsula, but this is not expected to result in
significant regeneration. Some of this rain could impact areas that
are preparing for the much more significant approach of Hurricane
Delta in a day or so. The cyclone is moving southwestward near
5 kt, and this should continue for another day or so until it
dissipates. The winds associated with Gamma's remnants should
gradually weaken through that time, though the system could still
produce a few areas of heavy rain over southeastern Mexico.
It is worth noting that several model trackers, and consequently
the consensus aids, depict that Gamma will move northward over the
Gulf of Mexico and strengthen significantly in a couple of days.
This is because the trackers lose track of Gamma when it dissipates
and start following nearby Hurricane Delta instead. In reality, no
models forecast that Gamma will remain a well-defined cyclone for
more than another day or two.
FORECAST POSITIONS AND MAX WINDS
INIT 06/0300Z 21.6N 88.4W 30 KT 35 MPH...POST-TROPICAL
12H 06/1200Z 21.1N 88.9W 30 KT 35 MPH...POST-TROP/INLAND
24H 07/0000Z 20.2N 89.6W 25 KT 30 MPH...POST-TROP/INLAND
36H 07/1200Z...DISSIPATED
$$
Forecaster Zelinsky
Facebook Comments