..TAMMY BEING MONITORED FOR POSSIBLE RE-DEVELOPMENT AS IT DRIFTS OVER THE ATLANTIC..

 

ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 PM EDT Thu Oct 26 2023

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

1. Northwestern Atlantic (Post-Tropical Cyclone Tammy):
A strong extratropical cyclone (former Tammy) associated with an 
occluded front is located a few hundred miles east-southeast of 
Bermuda.  There is a possibility that this system could regain 
tropical or subtropical characteristics while it meanders over the 
northwestern Atlantic through early next week. Regardless of 
development, the system has the potential to bring gusty winds and 
heavy rainfall to Bermuda during the next couple of days.  Interests 
in the area should monitor the progress of this system.  For 
additional information, including a hurricane-force wind warning, 
see the High Seas Forecasts issued by the National Weather Service 
and products from the Bermuda Weather Service.
* Formation chance through 48 hours...low...30 percent.
* Formation chance through 7 days...low...30 percent.

High Seas Forecasts issued by the National Weather Service
can be found under AWIPS header NFDHSFAT1, WMO header FZNT01 
KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php

Forecaster Bucci/R. Zelinsky

..ASTA LA VISTA TAMMY.. ..LAST ADVISORY ISSUED ON POST TROPICAL CYCLONE TAMMY.. ..OCT 26, 2023

 

So now that Tammy is winding down and lingering between two blocking high pressures, we could see some of the remnant showers from Tammy get caught up in the counter-clockwise flow around the high pressure and end up over the Bahamas or even south Florida.

Most of the ensemble models show possible development in the Caribbean, so I will keep a close eye.

RTW

...TAMMY BECOMES POST-TROPICAL, BUT IT IS STILL PRODUCING HURRICANE-FORCE WINDS... ... THIS IS THE LAST ADVISORY...

5:00 AM AST Thu Oct 26 Location: 30.5°N 58.4°W Moving: N at 12 mph Min pressure: 973 mb Max sustained: 85 mph

..TAMMY 11:OOAM EDT UPDATE OCT. 25, 2023..

 

TAMMY STRENGTHENING SHOULD COME TO AN END AS THE ENVIRONMENT BECOMES UNFAVORABLE. DRY AIR, COOLER SEA SURFACE TEMPS, AND STRONG WIND SHEAR WILL HELP TO WEAKEN TAMMY TO A TROPICAL STORM.

ANOTHER TROUGH MOVING IN FROM CANADA WILL TRACK EAST AND HELP TURN SANDY EAST A BIT. AZORES HIGH COULD BLOCK SANDY FROM GETTING VERY FAR, THOUGH. FORECAST ENSEMBLES ARE ALL OVER THE PLACE, BUT SANDY WILL NOT BE AFFECTING LAND. IT COULD COME CLOSE TO BERUMDA, BUT IT DOES NOT LOOK LIKE DIRECT DIRECT HIT. I WILL CONTINUE TO MONITOR.

RTW

...TAMMY STRENGTHENS FURTHER WHILE MOVING NORTHEASTWARD...

11:00 AM AST Wed Oct 25 Location: 26.6°N 59.3°W Moving: NE at 13 mph Min pressure: 965 mb Max sustained: 105 mph

..TAMMY MORNING UPDATE OCT. 24, 2023..

 

Tammy is moving into a hostile upper-level wind shear environment. This will eventually weaken the tammy down to a tropical storm. There are still models showing Tammy turning west, affecting Bermuda, and eventually turning back to the east, and that would be due to another cold front tracking east-northeast and off the east coast as the high weakens.

Then after that, another high builds in by November 2–3, and that will crank up the winds over the Gulf and the East Coast.

So far, the U.S. mainland is looking clear as I continue to monitor the tropics.

RTW

...HURRICANE TAMMY HOLDS STEADY WHILE MOVING NORTHEASTWARD OVER SOUTHWESTERN ATLANTIC...

11:00 AM AST Tue Oct 24 Location: 24.2°N 62.3°W Moving: NE at 8 mph Min pressure: 987 mb Max sustained: 75 mph

Tammy is moving into unfavorable upper-level wind shear and is already looking disorganized!