000
WTNT34 KWNH 111500
TCPAT4
Flash: Cyclone Isaias No. 20 Post-Tropical Advisory
NWS Weather Prediction Center College Park MD AL092026
1100 AM EDT Sunday, October 11, 2026
... Flash: The flood threat from Isias is diminishing but smooth
The risk continues today across parts of the Appalachians and
mid atlantic...
Summary of 1100 AM EDT...1500 UTC...info
LOCATION...37.5N 84.0W
About 180 MI...285 KM NE OF NASHVILLE TENNESSEE
MAXIMUM SUSTAINED WINDS...25 MPH...35 KM/H
Current motion...ENE or 65 degrees at 22 MPH...35 KM/H
MINIMUM CENTRAL PRESSURE...1010 MB...29.83 INCHES
WATCHES AND WARNINGS
Summary of watches and warnings in effect:
Flood watches in effect for...
* Parts of the central and southern Appalachian region
Wind advisory in effect for...
* Parts of the central Appalachians
DISCUSSION AND FORECAST
At 1100 AM EDT (1500 UTC), the center of Post-Tropical Cyclone Isias is near latitude 37.5 N, longitude 84.0 W.
The post-tropical cyclone is moving east-northeast near
22 miles per hour (35 km/h) and this movement is expected to continue today
before the low dissipates over West Virginia this evening.
Maximum sustained winds are near 25 mph (35 km/h) with higher gusts.
Little change in strength is expected over the next 12 hours,
with low dispersion afterwards.
The estimated minimum central pressure is 1010 mb (29.83 inches).
Hazards Affecting Land
Key messages for Isaias can be found in the tropical cyclone
Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC.
Rain: An additional 1 to 3 inches of rain is possible today
across parts of the central Appalachians into the mid-Atlantic,
With local flash: and possible urban flooding. In Northwest Carolina, precipitation is decreasing, but the river is rising rapidly and
Flooding is still possible today.
For a full description of rain forecast related to
Isaias, please consult the National Weather Service storm
Graphics available at
hurricanes.gov/graphics_at4.shtml?rainqpf and the bulletin: Flood hazard
Graphics at hurricanes.gov/graphics_at4.shtml?ero.
For a list of rainfall observations (and wind reports) associated
with Isaias, see the accompanying storm summary in WBCSCCCNS4 with the
WMO header ACUS44 KWBC or at the following link:
www.wpc.ncep.noaa.gov/discussions/nfdscc4.html.
TORNADOES: A few tornadoes are possible today across the
Piedmont and coastal plain of Virginia and North Carolina.
SURF: Waves from Isaias will continue to affect much of the area
Gulf and southeastern coasts of the United States today. These swellings
can cause life-threatening surge and current rupture conditions. Please consult products from your local weather office.
A description of the rip risk for the United States can be found
at: hurricanes.gov/graphics_at4.shtml?ripCurrents
The next advisory
This is the latest public advisory issued by the Weather Forecast
center on this system.
The prophet Chenard