September 2023

General Weather Discussions and Analysis
Waded
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Waded wrote: Thu Sep 14, 2023 3:38 pm Severe thunderstorm in the Magnolia Gardens area by the San Jacinto River. Strong winds, torrential rain, numerous lighting strikes, hail.
Next day, same area, same thing. I just rolled by an even stronger storm than this a few minutes ago. It was like a tropical storm. The trees were bending, fierce gusts. Fire Department called it a mini tornado. Wind direction was constantly changing and almost did a 360.
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don
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Severe Thunderstorm Warning


BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Houston/Galveston TX
406 PM CDT Fri Sep 15 2023

The National Weather Service in League City has issued a

* Severe Thunderstorm Warning for...
West central Chambers County in southeastern Texas...
Southeastern Harris County in southeastern Texas...

* Until 430 PM CDT.

* At 406 PM CDT, a severe thunderstorm was located over Channelview,
moving southeast at 25 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
Northern Pasadena, Baytown, Deer Park, Cloverleaf, Highlands,
Channelview, northern Clear Lake, Morgan`s Point, Houston Ship
Channel, San Jacinto State Park, Hunterwood, Sheldon, Northshore,
and El Dorado / Oates Prairie.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.


HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
Cpv17
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You’ve gotta be kidding me.. rain all around my house today and hardly a freaking drop here. Just a few miles away in every direction, they got 1-2” of rain. Sucks! Lucky I got that half an inch last night.
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jasons2k
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.65”
Cromagnum
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Just landed at Hobby after circling for an hour so I assume we had a storm roll through. Will have to check radar to see if I got lucky.
sswinney
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I just made it home from driving in this hot mess for two hours. The storm I passed through at 288 and the belt and in Shadow Creek was really bad. Driving 8mph and couldn’t see anything. Had to be four inch an hour rates.
Been here for years since Katrina.
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djmike
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Finally a deluge today at the house. Wed-Fri totaling 2.75”
I’ll take it. 50% Saturday so many will have a chance to add on top of what they’ve already gotten.
Mike
Beaumont, TX
(IH-10 & College Street)
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Looks like the SE Houston area was a big winner once again today: huge totals in La Porte, League City, Pearland, Friendswood, etc areas over the past few days. Decent showings around the Fort Bend/Sugar Land areas. Had the center of action today been a little further north, Hobby (which has done well for the month, mind you) would have had the deluge instead of Pearland/Shadow Creek.

Meanwhile, IAH and neaby areas got completely skipped. Though IAH had it's huge 2+ inch deluge yesterday.

The bulk of afternoons storms missed my home to the south ... but I had a good downpour already earlier this morning, so it's not all bad.
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Katdaddy
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A very nice heavy rain this afternoon. 2.21" which brings the 3-day total to 3.53". Actually, had water standing in the year in several places for a short time.
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snowman65
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glad to see the rain but caused big issues on the roads. Took my wife 4 hrs to get from Orange to the heights area.
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jasons2k wrote: Fri Sep 15, 2023 3:54 pmGeez the Cypress area gets skipped over again.
I could have sworn that I saw storms in that area during the Labor Day week event, as well as during Sept 8/9. Hopefully they at least got something out of those days, because people from that area are really riled up on Space City Weather's comments section.
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Rip76
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Before last night, I haven’t seen measurable rainfall at my house (Woodlands), since 6/21.
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DoctorMu
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0.98 inches of rain yesterday and today combined in CLL. Nearby Anderson got 1.26 inches of rain.
Cromagnum
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1.1 inches once i was finally able to check. Brings grand total since early June to around 1.6. Would love 2-3 more events just like that.
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don
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From the severe storm earlier.
1935 UNK 5 S Humble Harris TX 2993 9526 Several small to medium sized trees and large branches down in Fall Creek subdivision. (HGX)
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jasons2k
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Cromagnum wrote: Fri Sep 15, 2023 10:06 pm 1.1 inches once i was finally able to check. Brings grand total since early June to around 1.6. Would love 2-3 more events just like that.
I was watching and hoping you would get something. 1.1 inches isn’t bad at all. You were close to getting shafted again.

Hopefully it’s just the beginning of a trend, especially with El Nino in place this fall/winter.
Cromagnum
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jasons2k wrote: Fri Sep 15, 2023 11:58 pm
Cromagnum wrote: Fri Sep 15, 2023 10:06 pm 1.1 inches once i was finally able to check. Brings grand total since early June to around 1.6. Would love 2-3 more events just like that.
I was watching and hoping you would get something. 1.1 inches isn’t bad at all. You were close to getting shafted again.

Hopefully it’s just the beginning of a trend, especially with El Nino in place this fall/winter.
Hope so. I have alot of lawn to repair after this year. Rain will help.
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jasons2k
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South Texas about 30 mins ago (11:35)
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davidiowx
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Me likey what I am seeing out west. Unfortunately the mesos, not so much.
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tireman4
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000
FXUS64 KHGX 161134
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
634 AM CDT Sat Sep 16 2023

...New AVIATION...

.SHORT TERM...
(Today through Sunday Night)
Issued at 355 AM CDT Sat Sep 16 2023

Another fairly messy convective day appears to be on tap today, with
confidence in the development of scattered thunderstorms remaining
fairly high. A similar setup remains in place to that which has
produced the fairly robust storms the region has experienced over
the past several days, with a near-stationary front still sitting
near the coast, a tongue of deep moisture situated just to the W of
the I-45 corridor, and zonal flow in the midlevels. A series of weak
shortwaves embedded within this zonal should be sufficient to
trigger convection again today. Short-term models, while having a
fairly poor track record in initialization over the past couple of
days for our area, remain fairly consistent in indicating the
development of an MCS to our NW this morning that will push into the
region during the afternoon hours. As this system becomes more
organized and moves into a moisture-rich and relatively unstable
environment in our region, it is possible that some locations could
be impacted by strong wind gusts later this afternoon. Short term
guidance currently favors locations west of I-45 for stronger
convection, but locations further to the east cannot totally be
ruled out for stronger storm potential.

In addition to the potential for an organized cluster of storms this
afternoon, storm development associated with the aforementioned
frontal boundary is expected to impact locations mostly along the
coast. Storms driven by diurnal heating/boundaries are also possible
across most of the area. With all of the above factors in mind, most
locations are carrying a 40-60% chance of rain in today`s forecast.
Daytime highs should generally reach the upper 80s to low 90s,
though local variance in these numbers is likely due to developing
convection and cloud cover.

Broad midlevel ridging will build into the area beginning on Sunday,
with drier air moving in behind the now departing frontal boundary.
Given this, showers and storms will likely be confined to the coast
and offshore as the boundary departs. Surface dew points are
expected to drop into the 60s area wide with a brief shift to north
winds, resulting in a slightly more pleasant feeling day despite
slightly higher temperatures approaching the mid 90s. Many locations
will see lows in the upper 60s, while urban and coastal locations
are expected to sit in the 70s.

Cady

&&

.LONG TERM...
(Monday through Friday)
Issued at 355 AM CDT Sat Sep 16 2023

In the low levels, drier air will be filtering into the area
during the early part of the week. PW`s will transition down to
1.3" or less. Further aloft, we`ll be under a nw flow with broad
ridging stretching across Mexico into the Desert Southwest and
Rockies. During the second half of the work week, there are subtle
model differences in the ridge strength and position/orientation,
but most guidance generally concurs that the it will transition
further eastward into Texas. A more prevalent onshore flow
resumes toward midweek, and moisture levels should begin to
rebound. We`ll probably see the return of isolated rain chances
closer to the coast in association with the seabreeze, etc.
Depending on the orientation of the ridge we may, or may not, be
susceptible to disturbances rounding its nw periphery and down
into our area. ECMWF is a bit more bullish in this regard compared
to other deterministic data, but given the uncertainties at this
point will be going with the NBM/blends for now in regard to POPs.
47

&&

.AVIATION...
(12Z TAF Issuance)
Issued at 630 AM CDT Sat Sep 16 2023

Patchy fog resulting from moisture in place from yesterday`s
rainfall has produced pockets of IFR to LIFR visibilities across
the area. This fog should dissipate within the next 1-2 hours with
daytime heating, after which light north to northeast winds will
develop area-wide. Conditions should generally remain within VFR
thresholds for the remainder of the TAF period aside from any
temporary visibility reductions caused by the approach of a line
of thunderstorms this afternoon. Thunderstorms will develop to the
NW of the area this morning and move through the area between
approximately 20-01Z, producing downpours and some strong wind
gusts. Following the dissipation of storms, light and variable
winds will develop. Given low confidence of the exact location of
storm development (bulk of activity should be W of all terminals),
have mostly included VCTS wording for now. Some sites may
experience another round of fog overnight depending on the exact
location of rainfall.

Cady

&&

.MARINE...
Issued at 355 AM CDT Sat Sep 16 2023

Isolated to scattered showers and thunderstorms are expected in
the upper Texas coastal waters this morning. Mariners should keep
an eye on the weather this afternoon and evening as some models
indicate the potential for another disturbance making its way in
from the w/nw and generating another cluster of stronger storms.
At this time, areas from Freeport westward look to have the better
chances, though there is considerable uncertainty. Otherwise, the
diffuse frontal boundary that has been lingering over Southeast
Texas should get a push offshore tonight and Sunday. Winds should
be fairly light regardless, but should bring in slightly drier
air. Onshore winds resume and become better established toward the
early & middle parts of next week. 47

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL) 89 71 92 67 / 60 20 10 0
Houston (IAH) 91 74 93 71 / 50 20 20 10
Galveston (GLS) 88 79 89 78 / 40 30 30 20

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...Dense Fog Advisory until 9 AM CDT this morning for TXZ163-164-
179.

GM...None.
&&

$$

SHORT TERM...Cady
LONG TERM....42
AVIATION...Cady
MARINE...42
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