FLORIDA
STORMS
Tropical Storm Wanda
LOCATED
460 MI W OF THE AZORES
WINDS
40 MPH
PRESSURE
1003 MB
MOVING
NE AT 17 MPH
From the National Hurricane Center at 900 AM GMT Sun Nov 07 2021
Wanda continuing to accelerate northeastward.
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 900 AM GMT (0900 UTC), the center of Tropical Storm Wanda was located near latitude 38.5 North, longitude 35.5 West. Wanda is moving toward the northeast near 17 mph (28 km/h), and the storm is expected to continue accelerating northeastward through Monday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Little change in strength is expected during the next day or so. Wanda is forecast to merge with a frontal system tonight and dissipate by late Monday. Tropical storm force winds extend outward up to 60 miles (95 km) from the center in the southeastern quadrant. The estimated minimum central pressure is 1003 mb (29.62 inches).

At 900 AM GMT (0900 UTC), the center of Tropical Storm Wanda was located near latitude 38.5 North, longitude 35.5 West. Wanda is moving toward the northeast near 17 mph (28 km/h), and the storm is expected to continue accelerating northeastward through Monday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Little change in strength is expected during the next day or so. Wanda is forecast to merge with a frontal system tonight and dissipate by late Monday. Tropical storm force winds extend outward up to 60 miles (95 km) from the center in the southeastern quadrant. The estimated minimum central pressure is 1003 mb (29.62 inches).

Wanda is barely hanging on as a sheared tropical storm due to a small burst of deep convection located in the southeastern quadrant. The initial intensity has been maintained at 35 kt based on earlier 30-kt ASCAT data being co-located with the new burst of deep convection. Little or no change in strength is expected during the next 36 hours due to southwesterly vertical wind shear increasing to more than 40 kt by 18-24 hours, and sea-surface temperatures decreasing to less than 20 deg C beneath the cyclone. In the 18-24-h period, Wanda is expected to merge with a rapidly approaching cold front currently located to its west, becoming extratropical tonight and dissipating over the far northeastern Atlantic on Monday.

The initial motion estimate is now 050/15 kt. There are no significant changes to the previous forecast track and rationale. During the next 24 hours or so, Wanda is expected to continue accelerating northeastward ahead of a strong deep-layer trough and associated cold front. After merging with the front system, the extratropical low should maintain a fast northeastward motion until it dissipates by 48 hours. The new NHC forecast track is very similar to the previous advisory track, and lies close to the tightly packed consensus track models.

Wanda is no longer generating deep convection in association with its low-level circulation. In fact, most of the colder cloud tops seen on satellite over the center right now are actually upper-level cirrus associated with a cold frontal boundary part of a larger mid-latitude cyclone southeast of Greenland. In addition, an 1156 UTC ASCAT-B pass over Wanda's circulation shows that the north side is beginning to open up into a trough as the cold front is encroaching on the system. These above factors suggest that Wanda is no longer a tropical cyclone, and the system is now classified as a post-tropical low as of this advisory. The winds remain 35-kt based on the peak wind retrieval of 33-kt from the scatterometer data on the southeast side of the circulation.

The system has been accelerating to the northeast with the latest estimated motion at 045/22 kt. The post-tropical cyclone should continue to accelerate to the northeast until it merges with the baroclinic zone approaching it. A 12 hour point is provided for continuity and to indicate the transition to an extratropical cyclone, though its quite possible the system will be fully absorbed by the frontal boundary by then. The track guidance at 12 hours is tightly clustered, and the NHC track forecast at that time fame follows the consensus aids closely.

This is the last NHC advisory on Wanda. Additional information on this system can be found in High Seas Forecasts issued by Meteo France under WMO header FQNT50 LFPW and available on the web at www.meteofrance.com/previsions-meteo-marine/bulletin/grandlarge/ metarea2.

Wanda is barely hanging on as a sheared tropical storm due to a small burst of deep convection located in the southeastern quadrant. The initial intensity has been maintained at 35 kt based on earlier 30-kt ASCAT data being co-located with the new burst of deep convection. Little or no change in strength is expected during the next 36 hours due to southwesterly vertical wind shear increasing to more than 40 kt by 18-24 hours, and sea-surface temperatures decreasing to less than 20 deg C beneath the cyclone. In the 18-24-h period, Wanda is expected to merge with a rapidly approaching cold front currently located to its west, becoming extratropical tonight and dissipating over the far northeastern Atlantic on Monday.

The initial motion estimate is now 050/15 kt. There are no significant changes to the previous forecast track and rationale. During the next 24 hours or so, Wanda is expected to continue accelerating northeastward ahead of a strong deep-layer trough and associated cold front. After merging with the front system, the extratropical low should maintain a fast northeastward motion until it dissipates by 48 hours. The new NHC forecast track is very similar to the previous advisory track, and lies close to the tightly packed consensus track models.

Wanda is no longer generating deep convection in association with its low-level circulation. In fact, most of the colder cloud tops seen on satellite over the center right now are actually upper-level cirrus associated with a cold frontal boundary part of a larger mid-latitude cyclone southeast of Greenland. In addition, an 1156 UTC ASCAT-B pass over Wanda's circulation shows that the north side is beginning to open up into a trough as the cold front is encroaching on the system. These above factors suggest that Wanda is no longer a tropical cyclone, and the system is now classified as a post-tropical low as of this advisory. The winds remain 35-kt based on the peak wind retrieval of 33-kt from the scatterometer data on the southeast side of the circulation.

The system has been accelerating to the northeast with the latest estimated motion at 045/22 kt. The post-tropical cyclone should continue to accelerate to the northeast until it merges with the baroclinic zone approaching it. A 12 hour point is provided for continuity and to indicate the transition to an extratropical cyclone, though its quite possible the system will be fully absorbed by the frontal boundary by then. The track guidance at 12 hours is tightly clustered, and the NHC track forecast at that time fame follows the consensus aids closely.

This is the last NHC advisory on Wanda. Additional information on this system can be found in High Seas Forecasts issued by Meteo France under WMO header FQNT50 LFPW and available on the web at www.meteofrance.com/previsions-meteo-marine/bulletin/grandlarge/ metarea2.

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