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FLORIDA
STORMS
Tropical Storm Fred
LOCATED
75 MI WNW OF SANTO DOMINGO DOMINICAN REPUBLIC
WINDS
40 MPH
PRESSURE
1007 MB
MOVING
WNW AT 15 MPH
From the National Hurricane Center at 500 PM EDT Wed Aug 11 2021
Center of Fred crossing the Dominican Republic.
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key messages
Alerts
hazards
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DISCUSSION

1. Tropical storm conditions are ongoing across portions of the Dominican Republic. Tropical storm conditions are possible in northern Haiti and the southeastern Bahamas this evening, and in portions of Cuba by tonight.

2. Through early Thursday morning, heavy rainfall could lead to flash, urban, and small stream flooding, along with possible rapid river rises and potential mudslides in the Dominican Republic.

3. There is a risk of wind and rainfall impacts elsewhere in portions of Hispaniola, the Bahamas, and Cuba during the next few days, although the forecast is more uncertain than usual since Fred is forecast to interact with Hispaniola through tonight.

4. There is an increasing risk of wind and rainfall impacts in Florida beginning Friday night or early Saturday in the Keys and spreading northward through portions of the Peninsula and the Panhandle Saturday through Monday. Beginning Friday, heavy rainfall could lead to areal, urban, and small stream flooding, and possible rapid river rises across southern Florida. Interests throughout Florida should monitor Fred's progress and check updates to the forecast.

1. Tropical storm conditions are ongoing across portions of the Dominican Republic. Tropical storm conditions are possible in northern Haiti and the southeastern Bahamas this evening, and in portions of Cuba by tonight.

2. Through early Thursday morning, heavy rainfall could lead to flash, urban, and small stream flooding, along with possible rapid river rises and potential mudslides in the Dominican Republic.

3. There is a risk of wind and rainfall impacts elsewhere in portions of Hispaniola, the Bahamas, and Cuba during the next few days, although the forecast is more uncertain than usual since Fred is forecast to interact with Hispaniola through tonight.

4. There is an increasing risk of wind and rainfall impacts in Florida beginning Friday night or early Saturday in the Keys and spreading northward through portions of the Peninsula and the Panhandle Saturday through Monday. Beginning Friday, heavy rainfall could lead to areal, urban, and small stream flooding, and possible rapid river rises across southern Florida. Interests throughout Florida should monitor Fred's progress and check updates to the forecast.

CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for...
- Dominican Republic on the south coast from Punta Palenque eastward and on the north coast from the Dominican Republic/Haiti border eastward A Tropical Storm Watch is in effect for...
- Haiti from the northern border with the Dominican Republic to Gonaives
- Turks and Caicos Islands
- Southeastern Bahamas
- The Cuban provinces of Ciego de Avila, Camaguey, Las Tunas, Holguin, Granma, Santiago de Cuba, and Guantanamo A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. Interests elsewhere in Haiti, the Bahamas, Cuba, and the southern Florida Peninsula and the Florida keys should monitor the progress of Fred. For storm information specific to your area, please monitor products issued by your national meteorological service.

CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for...
- Dominican Republic on the south coast from Punta Palenque eastward and on the north coast from the Dominican Republic/Haiti border eastward A Tropical Storm Watch is in effect for...
- Haiti from the northern border with the Dominican Republic to Gonaives
- Turks and Caicos Islands
- Southeastern Bahamas
- The Cuban provinces of Ciego de Avila, Camaguey, Las Tunas, Holguin, Granma, Santiago de Cuba, and Guantanamo A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. Interests elsewhere in Haiti, the Bahamas, Cuba, and the southern Florida Peninsula and the Florida keys should monitor the progress of Fred. For storm information specific to your area, please monitor products issued by your national meteorological service.

Key messages for Fred can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1, WMO header WTNT41 KNHC and on the web at www.hurricanes.gov/graphics_at1.shtml?key_messages.

RAINFALL: Tropical Storm Fred is expected to produce the following rainfall amounts: Across the Dominican Republic...3 to 5 inches, with isolated maximum totals of 8 inches. Heavy rainfall through Thursday morning could lead to flash, urban, and small stream flooding, along with possible rapid river rises and the potential for mudslides. Over Haiti, the Turks and Caicos, the eastern Bahamas, and Cuba...1 to 3 inches with isolated maximum totals of 5 inches. Across the western Bahamas...3 to 5 inches, with isolated maximum totals of 8 inches. Beginning Friday into next week, heavy rainfall associated with Fred will impact Florida and parts of the Southeast. Through Monday, 3 to 5 inches of rain is anticipated across the Keys and the southern Florida Peninsula, with isolated maximum totals of 8 inches. Heavy rainfall could lead to areal, urban, and small stream flooding, along with possible rapid river rises.

WIND: Tropical storm conditions should continue over portions of the Dominican Republic for a few more hours. Tropical storm conditions are possible along the northern coast of Haiti, the Turks and Caicos, and the southeastern Bahamas beginning tonight. Tropical storm conditions are possible in Cuba beginning Thursday.

SURF: Swells generated by Fred are expected to continue across the U.S. Virgin Islands, Puerto Rico and Hispaniola tonight, where they could cause life threatening surf and rip current conditions. Please consult products from your local weather office.

Key messages for Fred can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1, WMO header WTNT41 KNHC and on the web at www.hurricanes.gov/graphics_at1.shtml?key_messages.

RAINFALL: Tropical Storm Fred is expected to produce the following rainfall amounts: Across the Dominican Republic...3 to 5 inches, with isolated maximum totals of 8 inches. Heavy rainfall through Thursday morning could lead to flash, urban, and small stream flooding, along with possible rapid river rises and the potential for mudslides. Over Haiti, the Turks and Caicos, the eastern Bahamas, and Cuba...1 to 3 inches with isolated maximum totals of 5 inches. Across the western Bahamas...3 to 5 inches, with isolated maximum totals of 8 inches. Beginning Friday into next week, heavy rainfall associated with Fred will impact Florida and parts of the Southeast. Through Monday, 3 to 5 inches of rain is anticipated across the Keys and the southern Florida Peninsula, with isolated maximum totals of 8 inches. Heavy rainfall could lead to areal, urban, and small stream flooding, along with possible rapid river rises.

WIND: Tropical storm conditions should continue over portions of the Dominican Republic for a few more hours. Tropical storm conditions are possible along the northern coast of Haiti, the Turks and Caicos, and the southeastern Bahamas beginning tonight. Tropical storm conditions are possible in Cuba beginning Thursday.

SURF: Swells generated by Fred are expected to continue across the U.S. Virgin Islands, Puerto Rico and Hispaniola tonight, where they could cause life threatening surf and rip current conditions. Please consult products from your local weather office.

At 500 PM EDT (2100 UTC), the center of Tropical Storm Fred was located near latitude 18.9 North, longitude 71.0 West. Fred is moving toward the west northwest near 15 mph (24 km/h), and a general west northwestward motion with a decrease in forward speed is expected to continue for the next two days or so. On the forecast track, the center of Fred is expected to be over Hispaniola for the next several hours, move near the Turks and Caicos Islands and the southeastern Bahamas on Thursday, and move near or north of the northern coast of central Cuba Thursday night and Friday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Fred is expected to weaken to a depression tonight as it crosses Hispaniola. Slow re intensification is expected beginning Thursday night. Tropical storm force winds extend outward up to 60 miles (95 km) mainly to the northeast of the center. The estimated minimum central pressure is 1007 mb (29.74 inches).

At 500 PM EDT (2100 UTC), the center of Tropical Storm Fred was located near latitude 18.9 North, longitude 71.0 West. Fred is moving toward the west northwest near 15 mph (24 km/h), and a general west northwestward motion with a decrease in forward speed is expected to continue for the next two days or so. On the forecast track, the center of Fred is expected to be over Hispaniola for the next several hours, move near the Turks and Caicos Islands and the southeastern Bahamas on Thursday, and move near or north of the northern coast of central Cuba Thursday night and Friday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Fred is expected to weaken to a depression tonight as it crosses Hispaniola. Slow re intensification is expected beginning Thursday night. Tropical storm force winds extend outward up to 60 miles (95 km) mainly to the northeast of the center. The estimated minimum central pressure is 1007 mb (29.74 inches).

During the past several hours, the center of Fred has moved inland over the Dominican Republic. The storm continues to produce an area of convection near and southeast of the center. However, the low-level circulation is losing some organization as it passes over mountainous terrain. There have been no observations near the center recently, so the initial intensity of 35 kt is based mainly on weakening from the previous over water intensity.

The initial motion is a somewhat uncertain 290/13. Some erratic motion is expected during the next 12 h or so as the center moves over the mountains of Hispaniola. After reaching the water, the cyclone is expected to moves west-northwestward on the south side of the subtropical ridge through about 60 h. After that, a northwestward motion is expected through the end of the forecast period as Fred moves toward a weakness in the ridge. The track guidance becomes a bit divergent during this time, with the ECMWF, Canadian, and HWRF models showing a track near or over the Florida Peninsula, while the GFS, UKMET, and HMON models show the center passing south and west of the Florida Keys, followed by a more northward motion over the Gulf of Mexico. The new forecast track is between these extremes, and it has only minor adjustments from the previous NHC track.

Fred is expected to weaken to a depression over Hispaniola during the next 12 h. Once back over water, the cyclone is expected to be in a moderate westerly shear environment through at least 60 h. Due to that, and the uncertainty in how well organized the system will be after crossing Hispaniola, the intensity forecast shows only modest intensification during this time. After that time, the global models forecast that an upper-level trough over Florida will gradually move to the north, with an large upper-level anticyclone following near or to the southeast of Fred. How close this anticyclone gets to Fred will determine how much the shear decreases while the system is over the eastern Gulf of Mexico, and the global models are not in great agreement on this. The GFS and Canadian keep the high far enough to the east to expose Fred to southwesterly upper-level winds, while the UKMET and ECMWF move it closer to the storm. The intensity forecast will show a slightly faster rate of strengthening after 72 h to match the guidance and the previous forecast. However, there is lower than normal confidence in this part of the intensity forecast.

During the past several hours, the center of Fred has moved inland over the Dominican Republic. The storm continues to produce an area of convection near and southeast of the center. However, the low-level circulation is losing some organization as it passes over mountainous terrain. There have been no observations near the center recently, so the initial intensity of 35 kt is based mainly on weakening from the previous over water intensity.

The initial motion is a somewhat uncertain 290/13. Some erratic motion is expected during the next 12 h or so as the center moves over the mountains of Hispaniola. After reaching the water, the cyclone is expected to moves west-northwestward on the south side of the subtropical ridge through about 60 h. After that, a northwestward motion is expected through the end of the forecast period as Fred moves toward a weakness in the ridge. The track guidance becomes a bit divergent during this time, with the ECMWF, Canadian, and HWRF models showing a track near or over the Florida Peninsula, while the GFS, UKMET, and HMON models show the center passing south and west of the Florida Keys, followed by a more northward motion over the Gulf of Mexico. The new forecast track is between these extremes, and it has only minor adjustments from the previous NHC track.

Fred is expected to weaken to a depression over Hispaniola during the next 12 h. Once back over water, the cyclone is expected to be in a moderate westerly shear environment through at least 60 h. Due to that, and the uncertainty in how well organized the system will be after crossing Hispaniola, the intensity forecast shows only modest intensification during this time. After that time, the global models forecast that an upper-level trough over Florida will gradually move to the north, with an large upper-level anticyclone following near or to the southeast of Fred. How close this anticyclone gets to Fred will determine how much the shear decreases while the system is over the eastern Gulf of Mexico, and the global models are not in great agreement on this. The GFS and Canadian keep the high far enough to the east to expose Fred to southwesterly upper-level winds, while the UKMET and ECMWF move it closer to the storm. The intensity forecast will show a slightly faster rate of strengthening after 72 h to match the guidance and the previous forecast. However, there is lower than normal confidence in this part of the intensity forecast.

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