Tuesday, August 22, 2017

Aug. 22 17

Northwest Houston, TX, during the early morning.
Northwest Houston, TX, during the early evening.
Northwest Houston, TX, during the late evening.


Summary: The day was hot, sunny, and dry. Maybe some rain. I didn't get a chance to look at the Houston, TX radar. I didn't see, feel, or hear any rain drops. Alto stratus, stratus, and stratocumulus clouds looked to be scattered across the sky, during the morning, afternoon, evening, and maybe night. The wind speeds looked to be calm with gentle to moderate gusts with maybe some moderately strong gusts. It felt warm, during the early morning and late evening. It felt very warm, during the mid-morning and night. It felt hot, during the late morning. It felt hot, almost very hot, during the early and mid-afternoon. It felt hot, becoming very warm, during the late afternoon. It felt hot, or maybe very warm, during the early evening. There was a Hazardous Weather Outlook issued for the Houston, TX area, by NOAA. There were no other watches, warnings, alerts, advisories, or weather statements/outlooks issued for the Houston, TX area, that I know of. The low temps looked to be in the 70's and 80's and the high temps looked to be in the 90's with maybe some 80's, for the Houston, TX area.


Storm Summary: There were no reports of flooding, or storm damage, that I know of.


My Storm Summary: I started to see some dark stratus and stratocumulus clouds, sometime during the late afternoon, I think and stopped seeing them, sometime during the early evening, I think. I didn't see, feel, or hear any rain drops. I didn't see any flooding, wet roads, or storm damage. I didn't hear any thunder, or see any lightning.


Locations: Northwest Houston, TX.


Thoughts: Well it looks like a tropical system getting close and maybe even causing some damage to the Houston, TX area is a good possibility this weekend.


Area Forecast Discussion 
Issued by NWS Houston/Galveston, TX
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000
FXUS64 KHGX 230322
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1022 PM CDT Tue Aug 22 2017

.DISCUSSION...
Short term...Storms have dissipated and skies clearing out so
should be quiet warm night across the area. Showers redeveloping
after midnight offshore and eventually spreading inland around
sunrise or shortly after. Minor tweaks to the current forecast
with this update.

Longer term with the tropics...Remnant low level circulation of
Harvey sitting right on the shoreline on the NW corner of Yucatan
peninsula and should drift off overnight. NAM (notoriously bad in
the extended periods) showing the very favorable development
environment which the other models from earlier today also point
to so hard to argue with that. Overall we are still in a dust off
the hurricane plan-flip to your checklist and make sure it is
ready to implement given the current track forecasts which bring
the impacts (very heavy rainfall 7+/surge/winds) from the system
to TX. Very concerning is the slow movement and possible
meanderings in or around SETX over the weekend into Tuesday which
could lead to a couple of core rain events. There could be some
extreme rain amounts if it does in fact reach into the area and
meander around for days and nights.

45

&&

.PREV DISCUSSION... /ISSUED 636 PM CDT Tue Aug 22 2017/

AVIATION...
Isolated daytime showers continue to dissipate early this
evening with dry conditions expected at the terminal overnight.
However, water vapor imagery shows an upper low spinning over the
northwest Gulf this evening and if this feature wobbles farther to
the west tonight as afternoon guidance indicated, a few pre-dawn
SHRA or even TSRA will be possible along the coast (possibly
impacting Galveston). Have left out of TAF for now due to low
confidence but may need to be included with the 06Z update.
Daytime heating will again result in isolated to scattered
SHRA/TSRA developing near Conroe/ the Houston terminals and points
south by early afternoon, with an approaching frontal boundary
looking to result in a second round of SHRA near College Station
and Huntsville late in the TAF period. Otherwise, expect VFR
conditions with variable winds less than 8 knots through the
period.

Huffman

PREV DISCUSSION... /ISSUED 353 PM CDT Tue Aug 22 2017/

DISCUSSION...
Not much convective coverage this afternoon as the drier air mass
residing over southeastern Texas seems to have won out...highest
moisture still remains centered over extreme southeastern Texas.
When an isolated shower does form along one of the numerous meso-
breezes it quickly becomes outflow dominant and fizzes out.
Surface analysis depicts a Southern Plains boundary sliding down
into central OK this afternoon. This boundary is forecast to sink
further south into the Piney Woods/Eastern Texas by tomorrow
afternoon. Thus...another focus point for which warmth-of-the-
day showers and thunderstorms could develop. Overnight minimums
will not surprisingly fall much...inland middle 70s to lower 80s
along the coast. Low end chance POPS for any short lived -TSRA
tomorrow during the day with the highest probs occurring across
the coastal and second tier counties. Maximum temperatures in the
mean middle 90s (upper 90s across the far interior) will equate to
maximum heat indices in the 102 to 106 F range.

The buzz around the re-development of Harvey is ramping up today
as can be expected with the deterministic suite coming into better
alignment through Days 3 thorough 5. While confidence remains low
until the wave crosses back into the Bay of Campeche tomorrow and
re-forms and possibly re-forms a closed off low...the suite all
agree to deepen the system to at least a strong tropical storm or
weak hurricane and track it towards the lower to middle Texas
coastline from tomorrow night through Friday morning. Once this
system makes landfall Friday or Saturday the slow storm movement
will place high rainfall-leading-to-flooding the main threat with
gusty (sub)tropical storm force winds a secondary threat. Our
message is 4 to 8 inches of widespread rainfall from Friday
through early Tuesday with localized amounts of between 8 to 16
inches (double widespread) being a reasonable possibility per the
slow storm movement. Granted Harvey is not regained the shadow of
his former self as of this writing but it is hard ignore that
every deterministic solution likes this "signal" of a landfalling
TC along the Texas coastline by this weekend. The main con to
formation...or to play devil`s advocate to just jumping on the
model train...would be the amount of dry air that the system will
be ingesting going into Thursday. W/V imagery does show quite a
bit of mid-upper dry air moving into the southern Bay of Campeche
and this could be a major inhibitor for development. The two main
pros for Harvey making it a bad week for us will be the fact that
(1) this wave is moving into a height and wind weakness channel
carved out by the western Gulf inverted trough between the Great
Basin and Bermuda ridges and (2) sea surface temperatures over the
western Gulf are currently between 85 and 88 F (based on the buoy
data). Although we may want to get caught up in the potential
specifics of this storm this may be a great time to begin the
preparedness message and focus on the impacts...do you have your
hurricane preparedness plan in place and can you enact this plan
within the next couple of days? 31

MARINE...
Light winds and low seas are expected to continue through
Wednesday. Should begin to see swells from the tropical system
over the Yucatan by slowly increase by late Wednesday into
Thursday. There is considerable uncertainty as to the development
and eventual landfall of the system. The latest models develop the
system back into Harvey with landfall somewhere on the southern
Texas coastline sometime late Friday. If this scenario pans out,
high seas and strong winds will affect the upper Texas coastal
waters at least late Thursday into Saturday morning. Tides along
the coast could become a problem as early as Thursday afternoon
and night given the swells and strong onshore winds. The latest
models show the potential for actual tide levels to reach or
exceed 3 feet for the high tide times either Thursday night or
Friday morning.

Mariners are urged to closely monitor the latest forecasts through
the weekend. 40

College Station (CLL) 76  98  76  95  76 / 10  30  30  40  40
Houston (IAH)         77  95  77  94  77 / 10  30  20  40  40
Galveston (GLS)       82  91  83  91  82 / 20  30  20  40  50

HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.

$$

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      76  98  76  95  76 /  10  30  30  40  40
Houston (IAH)              76  95  77  94  77 /  10  30  20  40  40
Galveston (GLS)            82  91  83  91  82 /  20  30  20  40  50

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.
&&

$$

Discussion...45

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Houston/Galveston TX
546 AM CDT Tue Aug 22 2017

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-231100-
Austin-Brazoria-Brazos-Burleson-Chambers-
Coastal waters from Freeport to the Matagorda Ship Channel out
20 NM-Coastal waters from High Island to Freeport out 20 NM-
Colorado-Fort Bend-Galveston-Galveston Bay-Grimes-Harris-Houston-
Jackson-Liberty-Madison-Matagorda-Matagorda Bay-Montgomery-Polk-
San Jacinto-Trinity-Walker-Waller-Washington-
Waters from Freeport to the Matagorda Ship Channel from 20 to
60 NM-Waters from High Island to Freeport from 20 to 60 NM-
Wharton-
546 AM CDT Tue Aug 22 2017

This hazardous weather outlook is for portions of Southeast Texas..

.DAY ONE...Today and Tonight

Although heat index values are not expected to be quite as high with
cloud cover and rain chances increasing, heat index values ranging
from 101 to 105 can still be expected today. This can still be dangerous
if engaging in outside activities. Please use caution when
working outside and drink plenty of water.


.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The National Hurricane Center is continuing to monitor tropical
disturbance #1 which consists of the remnants of tropical system
Harvey. Higher rainfall amounts along with stronger winds and
seas, could be possible between Thursday and Sunday depending on
the intensity and track of this system.


.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected.


$$

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