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FLORIDA
STORMS
Subtropical Storm Ana
LOCATED
270 MI NE OF BERMUDA
WINDS
45 MPH
PRESSURE
1006 MB
MOVING
NE AT 9 MPH
From the National Hurricane Center at 1100 PM AST Sat May 22 2021
ANA A BIT STRONGER AND MOVING FASTER TO THE NORTHEAST
TAP LINKS BELOW TO FOCUS
Alerts
hazards
summary
DISCUSSION

There are no coastal watches or warnings in effect.

There are no coastal watches or warnings in effect.

None.

None.

At 1100 PM AST (0300 UTC), the center of Subtropical Storm Ana was located near latitude 35.0 North, longitude 61.4 West. The storm is moving a bit faster toward the northeast near 9 mph (15 km/h). Ana is expected to accelerate further to the northeast on Sunday. Satellite wind data indicate that maximum sustained winds have increased slightly to near 45 mph (75 km/h) with higher gusts. Gradual weakening is expected over the next 24 hours and Ana is expected to dissipate by Monday. Tropical storm force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1006 mb (29.71 inches).

At 1100 PM AST (0300 UTC), the center of Subtropical Storm Ana was located near latitude 35.0 North, longitude 61.4 West. The storm is moving a bit faster toward the northeast near 9 mph (15 km/h). Ana is expected to accelerate further to the northeast on Sunday. Satellite wind data indicate that maximum sustained winds have increased slightly to near 45 mph (75 km/h) with higher gusts. Gradual weakening is expected over the next 24 hours and Ana is expected to dissipate by Monday. Tropical storm force winds extend outward up to 60 miles (95 km) from the center. The estimated minimum central pressure is 1006 mb (29.71 inches).

ontinues to produce a small, but concentrated area of moderate convection near its center. The storm remains embedded in a large-scale upper-level trough axis, and convection near the center has not been deep or expansive enough to result in significant upper-level anticyclonic outflow. This structure suggests that the system remains subtropical. However, scatterometer imagery also indicates that Ana's radius of maximum winds is very small. A recent METOP-B ASCAT pass at 0054 UTC had a peak wind retrieval of 36 kt just southeast of Ana's center. Due to the small size of Ana's wind field and allowing for some undersampling of this instrument, the initial intensity was bumped up to 40 kt for this advisory. Ana has begun to accelerate to the northeast and its initial motion is now 050/8 kt. A continued northeastward motion at an increasing forward speed is expected as deep-layer southwesterly steering flow increases between a deepening mid-latitude trough to the northwest and a subtropical high to the southeast. The upper-level trough axis that Ana remains centered in has kept the tiny cyclone in a small region of light upper-level flow, allowing convection to persist near the center. However, as Ana accelerates northeastward, this trough axis will gradually decay and upper-level northerly flow is expected to increase after 12 h. The resulting increase in northeasterly shear will import dry mid-latitude air and likely strip away the remaining convection associated with Ana by tomorrow night. The latest intensity forecast calls for slow weakening after 12 h with dissipation by 48 h, though it is possible that Ana could dissipate earlier than currently forecast.

ontinues to produce a small, but concentrated area of moderate convection near its center. The storm remains embedded in a large-scale upper-level trough axis, and convection near the center has not been deep or expansive enough to result in significant upper-level anticyclonic outflow. This structure suggests that the system remains subtropical. However, scatterometer imagery also indicates that Ana's radius of maximum winds is very small. A recent METOP-B ASCAT pass at 0054 UTC had a peak wind retrieval of 36 kt just southeast of Ana's center. Due to the small size of Ana's wind field and allowing for some undersampling of this instrument, the initial intensity was bumped up to 40 kt for this advisory. Ana has begun to accelerate to the northeast and its initial motion is now 050/8 kt. A continued northeastward motion at an increasing forward speed is expected as deep-layer southwesterly steering flow increases between a deepening mid-latitude trough to the northwest and a subtropical high to the southeast. The upper-level trough axis that Ana remains centered in has kept the tiny cyclone in a small region of light upper-level flow, allowing convection to persist near the center. However, as Ana accelerates northeastward, this trough axis will gradually decay and upper-level northerly flow is expected to increase after 12 h. The resulting increase in northeasterly shear will import dry mid-latitude air and likely strip away the remaining convection associated with Ana by tomorrow night. The latest intensity forecast calls for slow weakening after 12 h with dissipation by 48 h, though it is possible that Ana could dissipate earlier than currently forecast.

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