The Weather Prediction Center

College Park, MD


Tropical Summary Message



BULLETIN
Post-Tropical Cyclone Alberto Advisory Number  25
NWS Weather Prediction Center College Park MD   AL012018
500 AM EDT Thu May 31 2018

...ALBERTO BECOMES A POST-TROPICAL CYCLONE AS IT ATTEMPTS TO EXIT
NORTHEASTERN LOWER MICHIGAN...
...HEAVY RAINFALL THREAT FADING NEAR ITS CENTER...


SUMMARY OF 500 AM EDT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...44.9N 83.9W
ABOUT 20 MI...30 KM WSW OF ALPENA MICHIGAN
MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H
PRESENT MOVEMENT...NNE OR 20 DEGREES AT 35 MPH...55 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES


WATCHES AND WARNINGS
--------------------
Flash Flood Watches remain in effect for the western Carolinas,
northwest Virginia, and far eastern West Virginia.


DISCUSSION AND OUTLOOK
----------------------
At 500 AM EDT (0900 UTC), the center of Post-Tropical Cyclone
Alberto, now a wave of low pressure along a frontal zone, was
located near latitude 44.9 North, longitude 83.9 West.  The
post-tropical cyclone is moving toward the north-northeast near 35
mph (55 km/h) and this motion is expected to continue until it
attempts to merge with an approaching frontal wave in southeast
Ontario early this afternoon.

Maximum sustained winds are near 30 mph (45 km/h) with higher gusts.

The estimated minimum central pressure is 994 mb (29.36 inches).


HAZARDS AFFECTING LAND
----------------------
RAINFALL:  Additional rainfall of 1 to 2 inches, with isolated
higher amounts, will be possible within the convergent flow
well to the southeast of Alberto across the western Carolinas and
near the Blue Ridge Mountains of Virginia this morning. Isolated to
scattered flash flooding will remain a possibility across this
area.

WIND:  Wind gusts approaching tropical-storm force (39 mph or 62
km/h) will fade this morning across southeast Lower Michigan as
the system pulls away to the northeast.


For more information on rainfall totals please see the Storm Summary
available at www.wpc.ncep.noaa.gov/discussions/nfdscc5.html


NEXT ADVISORY
-------------
This is the last public advisory issued by the Weather Prediction
Center on this system.

$$
Forecaster Roth




Last Updated: 437 AM EDT THU MAY 31 2018