[Tropical] Tropical Cyclone Discussion

[EMWIN Server]

WTNT43 KNHC 260235
TCDAT3

Hurricane Hanna Discussion Number  13
NWS National Hurricane Center Miami FL       AL082020
1000 PM CDT Sat Jul 25 2020

Hanna made landfall around 2200 UTC over Padre Island, Texas, and
then made a second landfall a little more than an hour later in
eastern Kenedy County, Texas.  The estimated intensity was 80 kt for
both of those landfalls.  Since then, Hanna has been moving inland
over southern Texas and has weakened.  The initial intensity is
lowered to 65 kt for this advisory, based on Doppler radar velocity
data and surface observations.  Even though the hurricane has
weakened some, it still has an impressive appearance in radar images
with an eye, eyewall, and rainbands evident.

The storm is moving west-southwestward at 8 kt, steered by a
mid-level ridge situated to its north over the central United
States. This motion should continue, taking Hanna across extreme
southern Texas overnight and across northeastern Mexico on Sunday.
The new NHC track forecast is just a little south of the previous
one, trending toward the latest consensus models.

Now that Hanna is inland, rapid weakening is forecast. Hanna should
fall below hurricane strength in the next few hours and weaken to a
tropical depression by late Sunday. Hanna is forecast to dissipate
over the rugged terrain of Mexico on Monday.

Key Messages

1. Life-threatening storm surge will continue along portions of the
Texas coast from Port Mansfield to Port O'Connor, where a Storm
Surge Warning is in effect. Residents in these locations should
follow advice given by local emergency officials.

2. Hurricane conditions will continue within the Hurricane Warning
area along the Texas coast for a few more hours. Strong winds are
expected to spread farther inland across portions of south Texas
where a Tropical Storm Warning is in effect.

3. Hanna is expected to produce heavy rains across portions of
southern Texas and northeastern Mexico. These rains will result in
life-threatening flash flooding and isolated minor to moderate
river flooding.

FORECAST POSITIONS AND MAX WINDS

INIT  26/0300Z 26.6N  98.0W   65 KT  75 MPH...INLAND
 12H  26/1200Z 26.2N  99.1W   45 KT  50 MPH...INLAND
 24H  27/0000Z 25.4N 100.6W   30 KT  35 MPH...INLAND
 36H  27/1200Z 24.6N 101.9W   20 KT  25 MPH...POST-TROP/REMNT LOW
 48H  28/0000Z...DISSIPATED

$$
Forecaster Cangialosi
This weather bulletin was brought to you by:
www.nashvilleweather.net