Atlantic - Hanna forms July 23, 2020

[Psychoma]

And forecast intensity & track vs actual, you can see each update it was forecasted stronger and heading more south. And still continues to strengthen.
https://twitter.com/bmcnoldy/status/1287129270133731328

[Psychoma]

Sat 25July 5pEDT/4pCDT
20miles(30km) NE Port Mansfield, TX
70miles(115km) S Corpus Christi, TX
Hurricane winds extend up to 30miles(45km) from center, TS winds 90miles(150km).
Winds 90mph(150km/h) - Cat1
Moving WSW 8mph(13km/h)
pressure 973mb.

Landfall just occurred Padre Island, about 15miles(20km) North of Port Mansfield at 6pEDT/5pCDT.

Radar wind velocity puts the stronger wind field in a circle around the storm center that stretches from south of Corpus Christi, TX down to near Port Isabel, TX. Basically if you're North or South of those two areas respectfully then you're outside of the strongest winds. This circle of stronger winds will continue to follow the storm center to the W/WSW. Once inland winds will begin to slowly but steadily weaken. Downed trees/power issues typically expected anywhere around and above 40mph.

Wind Obs from North to South: Data from here: https://www.windalert.com/search/26.848/-95.622/7
Note: the level/falling/increasing is just to convey trend, if get another rain band across an area then values can increase.
Port O'Connor: 26mph sustained, gust to 37mph, level/falling
Port Aransas: 34mph, gust to 43mph, level/falling
Corpus Christi NAS: 38mph, gust to 53mph, level
Corpus Christi Airport: 35mph, gust to 43mph, level
North Padre Island: 36mph, gust to 51mph, level
Baffin Bay: 64mph, gust to 79mph, increasing.
Padre Island: 60mph, gust to 74mph.
Armstrong: 30mph, gust to 44mph, increasing.
Port Isabel: 24mph, gust to 37mph, increasing.
South Padre Island: 37mph, gust to 47mph, increasing.

Surge Obs, from North to South: Data from here: https://tidesandcurrents.noaa.gov/in...orm/Hanna.html
Port O'Connor about 2.9ft, Moderate Flood stage, dropping/level
Port Lavaca about 3.5ft, Moderate Flood stage, dropping
Rockport/Aransas Bay about 2.2ft, Minor Flood stage, rising
Port Aransas about 2.8ft, Minor Flood stage, dropping/level
Nueces Bay about 3.7ft, Moderate to Major Flood stage, rising quickly
Corpus Christi at USS Lexington about 3.4ft, Moderate Flood stage, rising
Packery Channel about 3ft, Minor Flood stage, dropping
Bob Hall Pier about 4ft, Major Flood stage, falling (peaked around 6ft!)
-Current data errors south of there
Port Mansfield negative 1.5ft, dropping
Port Isabel almost 1.3ft, dropping.
South Padre Island USCG about 1.8ft, Minor Flood stage, dropping/level.

**Note: keep in mind surge comes in with the onshore winds, so as winds shift the surge switches too, so one area may be fine, below normal water heights but when/if winds reverse as storm passes by then could see their surge later on still.

[Psychoma]

Sat 25July 11pEDT/10pCDT
Winds 75mph.

Storm Surge warning only for Port Mansfield to Port O'Connor, all others canceled.
Hurricane Warning only for Port Mansfield to Baffin Bay, all others canceled.
TS Warning Barra el Mezquital Mexico to Port Mansfield, TX & Baffin Bay to Port O'Connor, TX.

Wind, rain/flood, tornado threats remain thru the night.

Surge Obs, from North to South:
Port O'Connor about 2.2ft, Minor Flood stage, dropping (peak 3.2ft)
Port Lavaca about 3ft, Moderate Flood stage, dropping (peak 3.8ft)
Rockport/Aransas Bay about 2.3ft, Minor Flood stage, rising (At peak)
Port Aransas about 2.5ft, Minor Flood stage, dropping/level (peak 3.1ft)
Nueces Bay about 4.2ft, Major Flood stage, rising/level (peak 4.5ft)
Corpus Christi at USS Lexington about 3.7ft, Moderate Flood stage, rising/level (peak 3.9ft)
Packery Channel about 2.2ft, Minor Flood stage, dropping (peak 3.5ft)
Bob Hall Pier about 2.8ft, Minor Flood stage, dropping (peak 6ft)
-Current data errors south of there
Port Mansfield negative 0.5ft, rising
Port Isabel almost 1.3ft, dropping.
South Padre Island USCG about 1.3ft, dropping.

[Psychoma]

Sun 26July 8aEDT/7aCDT
Center now moved into Mexico. VERY heavy rains and flooding occurring in Southeast TX & NE Mexico. Max storm winds around 50mph and continues to subside. Any left over storm surge continues to drop, no more surge warnings.

Up to 3" per hour rain rates are possible through the morning and likely into the afternoon as well: https://twitter.com/NWSWPC/status/1287287631466790912

Tornadoes will be possible across South Texas rest of the day, typically short lived with rain bands, common in the Northeast side of landfalling tropical systems. https://twitter.com/NWSSPC/status/1287369613865439235

[LKJ1988]

If it had 300 more miles of water it could have been a CAT3.

[Psychoma]

some additional wind obs from Saturday, area it made landfall is sparsely populated and not many sensors to record but we have:
-Laguna Madre 60+mph, gust to 103mph
-Baffin Bay 65+mph, gust to 80mph
-A buoy offshore measured 154mph gust but that’s suspect and possibly captured a tornado passing by (rare but has happened before) or some other possible error.

[Psychoma]

Sun 26July 5pEDT/4pCDT Officially weakens to Tropical Depression status with 35mph max winds. Threats remaining are flooding rains and some possible brief tornadoes.