Hanna made landfall on the lower Texas coast but produced tropical storm force winds and elevated tides, minor coastal flooding across coastal Matagorda and Brazoria Counties.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HGX wrote it up.
Hanna made landfall on the lower Texas coast but produced tropical storm force winds and elevated tides, minor coastal flooding across coastal Matagorda and Brazoria Counties.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Houston/Galveston, TX wrote its last area forecast discussion before the first event at Jul 24, 11:40 PM CST, 20 minutes earlier.
Area Forecast Discussion
National Weather Service Houston/Galveston TX
1240 AM CDT Sat Jul 25 2020
.AVIATION...
Tropical Storm Hanna has strengthened some in the last couple of
hours and will continue to track west towards the Central and
Lower Texas Coast through Saturday. Rainbands generated by Hanna
will continue move across the local Gulf waters and into portions
of the CWA through Saturday late evening/night. This will
result in periods of SHRA/TSRA and VFR-MVFR cigs starting from the
coastal sectors moving northward into the rest of the CWA as the
day progresses. Will keep VCSH/VCTS in this forecast due to the
difficulty of pin pointing exactly when and where the activity
will occur for each TAF site and will implement TEMPOs as needed.
The most likely areas to receive rain remains across the southern
parts of the CWA (includes LBX, GLS, HOU), however, the
environment will be primed for rain chances for all of SE Texas
for much of the day. Because Hanna has strengthen some, winds in
this TAF package were slightly increased. Conditions are expected
to improve gradually Saturday evening/night as Hanna continues its
way further inland. 24
&&
PREV DISCUSSION... /ISSUED 408 PM CDT Fri Jul 24 2020/
SHORT TERM...(Tonight through Saturday night)
Tropical Storm Hanna looking a bit better on satellite and this
system is heading toward the Texas Coastal Bend possibly making
landfall on Saturday afternoon. A Tropical Storm Warning remains
in effect for Jackson, Matagorda and coastal Brazoria counties,
Matagorda Bay and the adjacent Gulf of Mexico waters. Moisture on
the east and north side of this feature will be pulled into SE TX
as Hanna treks west. PW values are progged to reach 2.60 inches
across SE TX tonight and Saturday. The storm motion will be quick
but if banding develops, there will be some potential for some
heavy rainfall amounts. A Flash Flood Watch has been issued
through 12z Sunday for mainly the southern and coastal sections of
SE TX, roughly south and east of a Morales to Simonton to Alvin
to Rollover Pass line. Still looking like widespread 2 to 4
inches of rain in the Watch area with locally higher amounts. As
these rain bands move toward the Upper Texas Coast, there will
also be some potential for weak tornadoes and waterspouts. In
addition, a Storm Surge Warning has been issued for areas along
the immediate coast from Sargent to Port O Connor with elevated
waters of 1-3 feet. A weak trough of low pressure will develop
to the east of Hanna on Saturday night and this feature will serve
as a focus for additional showers and thunderstorms with the
higher rain chances near the coast. 43
LONG TERM...(Sunday through Friday)
The trough will linger across the Gulf coast on Sunday and
Monday. The trough coupled with PW values around 2.60 inches and
some upper level dynamics will produce a good chance of showers
and thunderstorms on Sunday. The FFA is currently set to expire at
12z Sunday and the Watch may need to be extended over parts of the
area through Sunday afternoon. The trough weakens a bit on Monday
and PW values drop to around 2.40 inches so diurnally driven
showers and storms will again be possible on Monday.
A mid latitude trough will move across the southern Great lakes
will move east on Tuesday reinforcing the weakness over SE TX. So
despite PW values decreasing to around 2.20 inches, the weakness
aloft coupled with heating will allow for additional and mainly
diurnally driven showers and thunderstorms.
Upper level ridging will develop over the Southern Rockies on
Thursday and amplify and expand into Texas on Friday. A warming
and drying trend will develop toward the end of the week with
temperatures warming back up into the mid and upper 90's. 43
MARINE...
Tropical Storm Hanna was located over the west central Gulf of
Mexico and will continue to move west. Strong E-NE winds will
persist as Hanna treks toward the coast. A Tropical Storm Warning
is in effect for Matagorda Bay and the Gulf waters with the
strongest winds south of a PSX to Buoy 019 line. Winds tonight
could gust in excess of 50 knots at times, especially over the
southern half of the marine zones. Coastal flooding will be
possible as waters levels could rise 1 to 3 feet higher than
normal. Seas could get as high as 14 feet in the southern waters
later tonight. Moderate to strong onshore winds will persist into
Sunday evening as the gradient remains tight in the wake of Hanna.
Winds will veer to the south on Monday and decrease as the
gradient relaxes. The gradient will tighten again as low pressure
develops in the panhandle and a stronger onshore flow is expected
Thursday and Thursday night. 43
&&
.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL) 91 76 87 75 89 / 70 30 70 30 50
Houston (IAH) 88 77 85 76 87 / 70 50 80 40 70
Galveston (GLS) 87 82 85 81 86 / 90 80 90 70 70
&&
.HGX WATCHES/WARNINGS/ADVISORIES...
TX...Flash Flood Watch through Sunday morning for the following
zones: Brazoria Islands...Coastal Brazoria...Coastal
Galveston...Coastal Jackson...Coastal Matagorda...Fort
Bend...Galveston Island and Bolivar Peninsula...Inland
Brazoria...Inland Galveston...Inland Jackson...Inland
Matagorda...Matagorda Islands...Wharton.
Tropical Storm Warning for the following zones: Brazoria
Islands...Coastal Brazoria...Coastal Jackson...Coastal
Matagorda...Galveston Island and Bolivar Peninsula...Inland
Jackson...Inland Matagorda...Matagorda Islands.
Coastal Flood Warning until 10 AM CDT Sunday for the following
zones: Brazoria Islands...Coastal Galveston...Coastal
Harris...Galveston Island and Bolivar Peninsula.
GM...Tropical Storm Warning for the following zones: Coastal waters
from Freeport to Matagorda Ship Channel TX out 20 NM...
Coastal waters from High Island to Freeport TX out 20 NM...
Galveston Bay...Matagorda Bay...Waters from Freeport to
Matagorda Ship Channel TX from 20 to 60 NM...Waters from
High Island to Freeport TX from 20 to 60 NM.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1056 PM CDT FRI JUL 24 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1023 PM STORM SURGE JAMAICA BEACH 29.19N 94.98W
07/24/2020 GALVESTON TX PUBLIC
STORM SURGE OFF BOB SMITH ROAD.
&&The national radar mosaic for the moment the first event began.
4 coastal flood, 4 tropical storm. Local standard time, as filed.
Minor coastal flooding along Matagorda Bay and Gulf coast. Significant beach erosion along the Gulf coast. Impacted areas included Sargent and Matagorda. Tidal departures 2 to 3 feet above MHHW.
Minor coastal flooding along Matagorda Bay and Gulf coast. Significant beach erosion along the Gulf coast. Impacted areas included Sargent and Matagorda. Tidal departures 2 to 3 feet above MHHW.
Minor coastal flooding and significant beach erosion along Gulf coast. Impacted areas included Sargent and Surfside. Tidal departures 2 to 3 feet above MHHW.
Minor coastal flooding and significant beach erosion along Gulf coast. Impacted areas included Sargent and Surfside. Tidal departures 2 to 3 feet above MHHW.
Weatherflow sensors at Matagorda Bay and Surfside Beach measured sustained winds at tropical storm force for a period of time on July 25th. Minor coastal flooding and beach erosion were also observed.
Weatherflow sensors at Matagorda Bay and Surfside Beach measured sustained winds at tropical storm force for a period of time on July 25th. Minor coastal flooding and beach erosion were also observed.
Weatherflow sensors at Matagorda Bay and Surfside Beach measured sustained winds at tropical storm force for a period of time on July 25th. Minor coastal flooding and beach erosion were also observed.
Weatherflow sensors at Matagorda Bay and Surfside Beach measured sustained winds at tropical storm force for a period of time on July 25th. Minor coastal flooding and beach erosion were also observed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2020Every state in 2020This day in weather historyWarnings in Texas, July 2020The 2020 hurricane season
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 913484, 913485, 913486, 913487, 913480, 913481, 913482, 913483.