For everyone in Texas — be careful and be smart
— NHC Atlantic Ops (@NHC_Atlantic) August 24, 2017
Conditions in the Gulf of Mexico on Thursday morning were very favorable for intensification…. upper-level outflow to the north and east, which was ventilating the storm and allowing intensification to occur. Wind shear was light, 5 – 10 knots, which is favorable for intensification. The atmosphere had a high mid-level relative humidity of 70%, and the ocean was very warm, with sea surface temperatures (SSTs) of 30.5°C (87°F.) Warm waters extended deep into the ocean, providing a large reservoir of heat for the storm to draw upon….
The current favorable conditions for development will remain in place through Friday night, according to the 12Z Thursday run of the SHIPS model. Wind shear will remain light to moderate, and the atmosphere will be moist. SSTs will remain near 30°C (86°F), and warm waters will extend to considerable depth, with a total ocean heat content of 50 – 80 kilojoules per square centimeter. From Thursday night into Friday, Harvey will get an extra boost in energy as it passes over a warm-core eddy that broke off from the Loop Current. The oceanic heat content within the eddy exceeds 75 kilojoules per square centimeter, enough to support rapid intensification. However, the heat content of this eddy is not as high as the heat content available to Hurricane Katrina of 2005, when it moved over a similar warm-core eddy.
Be careful and open thread