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Post-tropical Cyclone Florence Advisory Number 77


Issued Active alert

Start Time

Tue 09/18/2018 11:00 AM EDT

End Time

Tue 10/02/2018 11:00 AM EDT



Full Alert Message

BULLETIN Post-Tropical Cyclone Florence Advisory Number 77 NWS Weather Prediction Center College Park MD AL062018 1100 AM EDT Tue Sep 18 2018 ...FLORENCE BECOMING AN INCREASINGLY ELONGATED LOW PRESSURE AREA AS IT CONTINUES TO PRODUCE HEAVY RAIN OVER PARTS OF THE MID-ATLANTIC AND INTO SOUTHERN NEW ENGLAND TODAY... SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...42.6N 71.9W ABOUT 45 MI...70 KM WNW OF BOSTON MASSACHUSETTS MAXIMUM SUSTAINED WINDS...25 MPH...35 KM/H PRESENT MOVEMENT...ENE OR 70 DEGREES AT 25 MPH...41 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- SUMMARY OF WATCHES AND WARNINGS IN EFFECT: There are no coastal watches or warnings in effect. Flash flood watches are in effect for portions of the Mid-Atlantic States and southern New England. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM EDT (1500 UTC), the center of Post-Tropical Cyclone Florence was located near latitude 42.6 North, longitude 71.9 West. The post-tropical cyclone is moving toward the east-northeast near 30 mph (41 km/h) and this motion is expected to increase as the low moves east into the western Atlantic later today. Maximum sustained winds are near 25 mph (35 km/h) with higher gusts. The low will transition into a trough off the East Coast tomorrow. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Florence is expected to produce heavy to excessive rainfall from the northern Mid-Atlantic states west into southern New York and southern New England. Some of these areas are expected to receive an additional 2 to 4 inches of rain. NEXT ADVISORY ------------- This is the last public advisory issued by the Weather Prediction Center on this system. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and available on the Web at