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Tropical Storm Harvey Advisory Number 30
NWS National Hurricane Center Miami FL AL092017
400 PM CDT Sun Aug 27 2017
...UNPRECEDENTED FLOODING OCCURING OVER SOUTHEASTERN TEXAS...
...DO NOT ATTEMPT TO TRAVEL IN THE AFFECTED AREA IF YOU ARE IN A
SAFE PLACE AND DO NOT DRIVE INTO FLOODED ROADWAYS...
SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION
ABOUT 25 MI...35 KM NW OF VICTORIA TEXAS
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...SE OR 140 DEGREES AT 2 MPH...4 KM/H
MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
A Tropical Storm Watch has been issued for the coast of Texas from
north of Sargent to San Luis Pass.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Tropical Storm Warning is in effect for...
* Port O'Connor to Sargent Texas
A Tropical Storm Watch is in effect for...
* North of Sargent to San Luis Pass Texas
Catastrophic and life-threatening flooding is occurring in
southeastern Texas, and flash flood emergencies are in effect
for portions of this area. Please see warnings and other products
issued by your local National Weather Service office for additional
information on this life-threatening situation.
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.
DISCUSSION AND 48-HOUR OUTLOOK
At 400 PM CDT (2100 UTC), the center of Tropical Storm Harvey was
located near latitude 29.0 North, longitude 97.0 West. Harvey is
drifting toward the southeast near 2 mph (4 km/h), and a slow
southeastward motion is expected over the next couple of days.
On the forecast track, the center of Harvey is forecast to move off
the middle Texas coast on Monday and meander just offshore through
Maximum sustained winds are near 40 mph (65 km/h) with higher gusts.
Little change in strength is forecast during the next 24 hours.
Some slight restrengthening is possible after the center moves
off the coast on Monday night and Tuesday.
Tropical-storm-force winds extend outward up to 140 miles (220 km)
primarily over water to the east of the center.
The estimated minimum central pressure is 1000 mb (29.53 inches).
HAZARDS AFFECTING LAND
RAINFALL: Harvey is expected to produce additional rainfall
accumulations of 15 to 25 inches through Friday over the upper Texas
coast and into southwestern Louisiana. Isolated storm totals may
reach 50 inches over the upper Texas coast, including the
Houston/Galveston metropolitan area. These rains are currently
producing catastrophic and life-threatening flooding, and flash
flood emergencies are in effect for portions of southeastern Texas.
DO NOT ATTEMPT TO TRAVEL IN THE AFFECTED AREA IF YOU ARE IN A SAFE
PLACE. DO NOT DRIVE INTO FLOODED ROADWAYS. Please see warnings and
products issued by your local National Weather Service office for
additional information on this life-threatening situation.
Elsewhere, Harvey is expected to produce total rain accumulations of
5 to 15 inches farther south into the middle Texas coast, farther
west toward the Texas Hill Country, and farther east across south-
A list of rainfall observations compiled by the NOAA Weather
Prediction Center can be found at:
STORM SURGE: The combination of a dangerous 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 is
expected to reach the following heights above ground if the peak
surge occurs at the time of high tide...
Port Aransas to Morgan City including Galveston Bay...1 to 3 ft
The deepest water will occur along the immediate coast near the
area of onshore winds, where the surge will be accompanied by large
and destructive waves. Surge-related 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 occurring in an area near the
center of Harvey and over portions of the tropical storm warning
area along the coast. Tropical storm conditions are likely to
persist in areas of onshore flow within the warning area during the
next day or so. Tropical storm conditions are possible within the
watch area by Monday night.
SURF: Swells generated by Harvey are affecting the coasts of Texas
and Louisiana. These swells are likely to cause life-threatening
surf and rip current conditions. Please consult products from your
local weather office.
TORNADOES: A few tornadoes are possible through Monday near the
upper Texas coast and into far southwest Louisiana.
Next intermediate advisory at 700 PM CDT.
Next complete advisory at 1000 PM CDT.