NHC/NOAA 2PM Update – Hurricane Hunter Plane investigating TS Gonzalo

The government of Barbados has canceled the Hurricane Watch for Barbados and St. Vincent and the Grenadines.

BULLETIN
Tropical Storm Gonzalo Intermediate Advisory Number 12A
NWS National Hurricane Center Miami FL AL072020
200 PM AST Fri Jul 24 2020

…HURRICANE HUNTER PLANE INVESTIGATING GONZALO…
…GONZALO EXPECTED TO BRING TROPICAL STORM CONDITIONS TO THE
SOUTHERN WINDWARD ISLANDS ON SATURDAY…

SUMMARY OF 200 PM AST…1800 UTC…INFORMATION
———————————————-
LOCATION…9.9N 54.8W
ABOUT 445 MI…715 KM E OF THE SOUTHERN WINDWARD ISLANDS
MAXIMUM SUSTAINED WINDS…45 MPH…75 KM/H
PRESENT MOVEMENT…W OR 275 DEGREES AT 18 MPH…30 KM/H
MINIMUM CENTRAL PRESSURE…1008 MB…29.76 INCHES

WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY…

The government of Barbados has canceled the Hurricane Watch for Barbados and St. Vincent and the Grenadines.

SUMMARY OF WATCHES AND WARNING IN EFFECT…

A Tropical Storm Warning is in effect for…
* Barbados
* St. Vincent and the Grenadines
* St. Lucia

A Tropical Storm Watch is in effect for…
* Tobago
* Grenada and its dependencies

A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 24 to 36 hours.

A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within 24 to 36 hours.

Interests elsewhere in the Windward Islands should monitor the progress of this system.

Learn more here

For storm information specific to your area, please monitor products issued by your national meteorological service.

DISCUSSION AND OUTLOOK
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At 200 PM AST (1800 UTC), the center of Tropical Storm Gonzalo was located by an Air Force Reserve Hurricane Hunter aircraft near latitude 9.9 North, longitude 54.8 West. Gonzalo is moving toward the west near 18 mph (30 km/h). A general westward to west-northwestward motion is expected during the next couple of days. On the forecast track, the center of Gonzalo will approach the southern Windward Islands tonight and then move across the islands on Saturday and over the eastern Caribbean Sea on Sunday.

The Hurricane Hunter aircraft has not yet completed its survey of Gonzalo, but preliminary data indicate that maximum sustained winds are near 45 mph (75 km/h) with higher gusts. There is considerable uncertainty in the intensity forecast, but some strengthening is possible during the next day or so before Gonzalo reaches the
southern Windward Islands. Weakening is expected after Gonzalo moves into the Caribbean Sea, and the cyclone is expected to dissipate by the middle of next week.

Gonzalo is a small tropical cyclone. Data from the reconnaissance aircraft indicate that tropical-storm-force winds extend outward up to 35 miles (55 km) from the center.

The most recent minimum central pressure reported by the Hurricane Hunter plane was 1008 mb (29.76 inches).

HAZARDS AFFECTING LAND
———————-
Key messages for Gonzalo can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT2 and WMO header WTNT42 KNHC.

WIND: Tropical storm conditions are expected within portions of the Tropical Storm Warning area on Saturday.

RAINFALL: Gonzalo is expected to produce total rain accumulations of 2 to 5 inches, with isolated maximum amounts of 8 inches in Barbados and the Windward Islands through Sunday night. Gonzalo is also expected to produce total rain accumulations of 2 to 4 inches in Trinidad and Tobago as well as 1 to 2 inches over northeastern Venezuela. Rainfall in Barbados and the Windward Islands could lead to life-threatening flash floods.

NEXT ADVISORY
————-
Next complete advisory at 500 PM AST.

Forecaster Zelinsky

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