Harvey Has Not Strengthened Yet Hurricane Watch Texas Coast
Harvey Has Not Strengthened Yet…Heading For Texas
Hurricane Watch For The Much of Texas Gulf Coast
An Air Force plane this evening found that Harvey has not strengthened yet to a Tropical Storm as it found winds below tropical storm force. Satellite loops show Harvey has not changed much in structure though convection continues to develop. Harvey has not moved much today, perhaps drifting northwestward at about 2 mph. It appears that a north or northwest motion may have started this evening.
Looking at the water vapor loop the upper low in the Northwest Gulf of Mexico is dissipating rapidly which is creating a much more conducive environment for strengthening. Harvey with slow movement over very warm water has a strong chance of reaching hurricane strength before landfall.
…HURRICANE HUNTER AIRCRAFT FINDS THAT HARVEY HAS NOT
SUMMARY OF 700 PM CDT…0000 UTC…INFORMATION
ABOUT 525 MI…845 KM SSE OF PORT OCONNOR TEXAS
ABOUT 460 MI…740 KM SE OF PORT MANSFIELD TEXAS
MAXIMUM SUSTAINED WINDS…35 MPH…55 KM/H
PRESENT MOVEMENT…NW OR 320 DEGREES AT 2 MPH…4 KM/H
MINIMUM CENTRAL PRESSURE…1003 MB…29.62 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Watch is in effect for…
* Port Mansfield to High Island
A Hurricane Watch is in effect for…
* North of Port Mansfield to San Luis Pass
A Tropical Storm Watch is in effect for…
* Boca De Catan Mexico to Port Mansfield Texas
* North of San Luis Pass to High Island
A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations during the next 48 hours.
For a depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
A Hurricane Watch means that hurricane conditions are possible
within the watch area. A watch is typically issued 48 hours
before the anticipated first occurrence of tropical-storm-force
winds, conditions that make outside preparations difficult or
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
Interests in southwestern Louisiana should continue to monitor the
progress of this system.
For storm information specific to your area in the United
States, including possible inland watches and warnings, please
monitor products issued by your local National Weather Service
forecast office. For storm information specific to your area outside
the United States, please monitor products issued by your national
DISCUSSION AND 48-HOUR OUTLOOK
At 700 PM CDT (0000 UTC), the center of Tropical Depression Harvey
was located near latitude 21.7 North, longitude 92.5 West. The
depression is moving erratically toward the northwest near 2 mph (4
km/h). A track toward the northwest or north-northwest at a faster
forward speed is expected for the next 48 hours. On the forecast
track, Harvey should be approaching the Texas coast late Friday.
Reports from an Air Force Reserve Hurricane Hunter aircraft
indicate that maximum sustained winds remain near 35 mph (55 km/h)
with higher gusts. Some strengthening is forecast during the next
48 hours, and Harvey could become a tropical storm later tonight
and a hurricane on Friday.
The minimum central pressure estimated from the Hurricane Hunter
aircraft data and Mexican surface observations is 1003 mb
MANY THANKS TO TROPICAL TIDBITS FOR THE WONDERFUL USE OF THE MAPS
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