Tropical Depression Claudette
LOCATED
25 MI W OF ATLANTA GEORGIA
WINDS
30 MPH
PRESSURE
1007 MB
MOVING
ENE AT 13 MPH
From the National Hurricane Center at 700 AM CDT Sun Jun 20 2021
CLAUDETTE STILL PRODUCING HEAVY RAINS WITH POSSIBLE FLASH FLOODS OVER MUCH OF THE SOUTHEASTERN UNITED STATES
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key messages
Alerts
hazards
summary
DISCUSSION

1. Claudette is expected to produce heavy rainfall and flashflooding across portions of the Florida Panhandle, northern Alabama,and Georgia through this morning, and into the Carolinas through Monday morning. Considerable flash, urban, and small stream flooding impacts are possible across these areas.

2. Tropical storm conditions are expected along portions of theNorth Carolina coast late tonight and Monday, where a Tropical StormWarning is in effect. Tropical storm conditions are possible in northeastern South Carolina tonight and Monday, where a Tropical Storm Watch is in effect.

1. Claudette is expected to produce heavy rainfall and flashflooding across portions of the Florida Panhandle, northern Alabama,and Georgia through this morning, and into the Carolinas through Monday morning. Considerable flash, urban, and small stream flooding impacts are possible across these areas.

2. Tropical storm conditions are expected along portions of theNorth Carolina coast late tonight and Monday, where a Tropical StormWarning is in effect. Tropical storm conditions are possible in northeastern South Carolina tonight and Monday, where a Tropical Storm Watch is in effect.

CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for...
- Little River Inlet to Duck, North Carolina
- Pamlico and Albemarle Sounds

A Tropical Storm Watch is in effect for...
- South Santee River, South Carolina to Little River Inlet

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

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

Interests elsewhere across the Carolinas should monitor the progress of this system.

For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office.

CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for...
- Little River Inlet to Duck, North Carolina
- Pamlico and Albemarle Sounds

A Tropical Storm Watch is in effect for...
- South Santee River, South Carolina to Little River Inlet

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

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

Interests elsewhere across the Carolinas should monitor the progress of this system.

For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office.

Key messages for Claudette can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC, and on the web at www.hurricanes.gov/graphics_at3.shtml?key_messages.

RAINFALL: Claudette is expected to produce additional rainfall totals of 1 to 3 inches with isolated maximum amounts of 6 inches across Alabama, the Florida Panhandle, northern and central Georgia, and Upstate South Carolina through the morning hours. As the system tracks north and east, bands of heavy rain will occur across portions of central and southern Georgia, central and coastal South Carolina into eastern North Carolina through Monday morning resulting in rainfall totals of 2 to 4 inches with isolated maximum amounts of 8 inches. Considerable flash, urban and small stream flooding impacts, as well as new and renewed minor to isolated moderate river flooding are possible across these areas.

Storm total rainfall of 5 to 10 inches with isolated 15 inch amounts was observed in southeast Louisiana, southern Mississippi, southern Alabama, and the western Florida panhandle.

For the latest rainfall reports and wind gusts associated with Claudette, see the companion storm summary at WBCSCCNS3 with the WMO header ACUS43 KWBC or at the following link: https://www.wpc.ncep.noaa.gov/discussions/nfdscc3.html

STORM SURGE: The combination of storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide...

NC/VA Border to Cape Lookout, NC...13 ft Cape Lookout, NC to Little River Inlet, SC...12 ft

Surgerelated flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office.

WIND: Tropical storm conditions are expected to begin in the warning area late tonight or early Monday. Tropical storm conditions are possible in the watch area tonight and Monday.

TORNADOES: A few tornadoes are possible today across parts of Georgia and the Carolinas.

Key messages for Claudette can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC, and on the web at www.hurricanes.gov/graphics_at3.shtml?key_messages.

RAINFALL: Claudette is expected to produce additional rainfall totals of 1 to 3 inches with isolated maximum amounts of 6 inches across Alabama, the Florida Panhandle, northern and central Georgia, and Upstate South Carolina through the morning hours. As the system tracks north and east, bands of heavy rain will occur across portions of central and southern Georgia, central and coastal South Carolina into eastern North Carolina through Monday morning resulting in rainfall totals of 2 to 4 inches with isolated maximum amounts of 8 inches. Considerable flash, urban and small stream flooding impacts, as well as new and renewed minor to isolated moderate river flooding are possible across these areas.

Storm total rainfall of 5 to 10 inches with isolated 15 inch amounts was observed in southeast Louisiana, southern Mississippi, southern Alabama, and the western Florida panhandle.

For the latest rainfall reports and wind gusts associated with Claudette, see the companion storm summary at WBCSCCNS3 with the WMO header ACUS43 KWBC or at the following link: https://www.wpc.ncep.noaa.gov/discussions/nfdscc3.html

STORM SURGE: The combination of storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide...

NC/VA Border to Cape Lookout, NC...13 ft Cape Lookout, NC to Little River Inlet, SC...12 ft

Surgerelated flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office.

WIND: Tropical storm conditions are expected to begin in the warning area late tonight or early Monday. Tropical storm conditions are possible in the watch area tonight and Monday.

TORNADOES: A few tornadoes are possible today across parts of Georgia and the Carolinas.

At 700 AM CDT (1200 UTC), the center of Tropical Depression Claudette was located near latitude 33.7 North, longitude 84.8 West. The depression is moving toward the eastnortheast near 13 mph (20 km/h). On the forecast track, the system should cross portions of the southeast U.S. through tonight, move over the coast of North Carolina into the western Atlantic Ocean on Monday, and be located south of Nova Scotia by late Tuesday.

Maximum sustained winds remain near 30 mph (45 km/h) with higher gusts. Some restrengthening is expected tonight, and Claudette is forecast to become a tropical storm again on Monday over eastern North Carolina. Further strengthening is possible over the western Atlantic Ocean through early Tuesday. Claudette is expected to become a posttropical cyclone by late Tuesday.

The estimated minimum central pressure from surface observations is 1007 mb (29.74 inches).

At 700 AM CDT (1200 UTC), the center of Tropical Depression Claudette was located near latitude 33.7 North, longitude 84.8 West. The depression is moving toward the eastnortheast near 13 mph (20 km/h). On the forecast track, the system should cross portions of the southeast U.S. through tonight, move over the coast of North Carolina into the western Atlantic Ocean on Monday, and be located south of Nova Scotia by late Tuesday.

Maximum sustained winds remain near 30 mph (45 km/h) with higher gusts. Some restrengthening is expected tonight, and Claudette is forecast to become a tropical storm again on Monday over eastern North Carolina. Further strengthening is possible over the western Atlantic Ocean through early Tuesday. Claudette is expected to become a posttropical cyclone by late Tuesday.

The estimated minimum central pressure from surface observations is 1007 mb (29.74 inches).

The area of deep convection near the center of Claudette has weakened over the past several hours, though rain bands have become more distinct in the southeastern quadrant. Surface observations continue to indicate that the maximum winds are about 25 kt, and these winds are almost all over the Gulf of Mexico well to the south of the center. Claudette is moving east-northeastward at about 11 kt. The system should gradually accelelerate in that direction through tonight as it moves ahead of a digging trough over the central United States, and all of the models show the system near the North Carolina coast by midday Monday. Claudette should then move even faster to the northeast through Tuesday ahead of the aforementioned trough due to stronger steering flow. Guidance remains in very good agreement through that time, and little change was made to the previous forecast. The end of the forecast remains uncertain as some of the guidance is showing more of a turn to the left closer to Nova Scotia. However, a stronger system would argue for something that remains more separate from the large mid-latitude trough steering the system, so the new forecast is close to the previous one, on the south side of the guidance.Conditions appear to be conducive for the re-development of Claudette once it encounters a more unstable marine environment late today. The system should move close to the Gulf Stream by Monday afternoon, likely fueling intensification while the shear is low. The previously divergent model suite is in better agreement now, with the GFS, UKMET and ECMWF models all showing the system becoming a tropical storm again near the North Carolina Outer Banks with some strengthening over the western Atlantic Ocean. Extratropical transiton should be quick after it moves north of the Gulf Stream, assisted by strong shear in 48 to 60 hours. The new intensity forecast is a little higher than the previous one, close to the NOAA Corrected Consensus Guidance.

The area of deep convection near the center of Claudette has weakened over the past several hours, though rain bands have become more distinct in the southeastern quadrant. Surface observations continue to indicate that the maximum winds are about 25 kt, and these winds are almost all over the Gulf of Mexico well to the south of the center. Claudette is moving east-northeastward at about 11 kt. The system should gradually accelelerate in that direction through tonight as it moves ahead of a digging trough over the central United States, and all of the models show the system near the North Carolina coast by midday Monday. Claudette should then move even faster to the northeast through Tuesday ahead of the aforementioned trough due to stronger steering flow. Guidance remains in very good agreement through that time, and little change was made to the previous forecast. The end of the forecast remains uncertain as some of the guidance is showing more of a turn to the left closer to Nova Scotia. However, a stronger system would argue for something that remains more separate from the large mid-latitude trough steering the system, so the new forecast is close to the previous one, on the south side of the guidance.Conditions appear to be conducive for the re-development of Claudette once it encounters a more unstable marine environment late today. The system should move close to the Gulf Stream by Monday afternoon, likely fueling intensification while the shear is low. The previously divergent model suite is in better agreement now, with the GFS, UKMET and ECMWF models all showing the system becoming a tropical storm again near the North Carolina Outer Banks with some strengthening over the western Atlantic Ocean. Extratropical transiton should be quick after it moves north of the Gulf Stream, assisted by strong shear in 48 to 60 hours. The new intensity forecast is a little higher than the previous one, close to the NOAA Corrected Consensus Guidance.

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