Tuesday, March 6, 2018

Mar. 5 18

Northwest Houston, TX, during the mid-morning.
Downtown Houston, TX, during the late morning.

Houston, TX radar, during the early afternoon.

Downtown Houston, TX, during the early afternoon.
West Houston, TX, during the early afternoon.
Northwest Houston, TX, during the early afternoon.
Northwest Houston, TX, during the mid-afternoon.
Cypress, TX, during the late evening.
Houston, TX radar, during the early night.
Houston, TX radar, during the late night.


Locations: Northwest, west, southwest, central southwest, southeast, and downtown Houston, TX, and Cypress, TX.


Thoughts: There were alot of scattered light to moderate showers with some bands of moderately heavy to heavy showers and thunderstorms, in the Houston, TX area, during the morning, afternoon, evening, and night. A heavy shower, or maybe thunderstorm passed over where I was in downtown Houston, TX, during the early afternoon. I also saw some light rain during the morning, evening, and maybe night. The day was warm, a little wet, and mostly cloudy. I think Galveston, TX broke a record high.

Area Forecast Discussion 
Issued by NWS Houston/Galveston, TX
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000
FXUS64 KHGX 060302
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
902 PM CST Mon Mar 5 2018

.DISCUSSION...
Cold front and associated line of showers and isolated
thunderstorms continues to work its way across Southeast
Texas this evening with the greatest thunderstorm
concentration off to our east in Louisiana where the
airmass is much more unstable. Mid evening radar is
showing additional storm development behind the front,
so far mainly in/around the CLL area. For the update
this evening, have adjusted rain chances for the
overnight hours with lower values inland and higher
numbers near the coast and offshore. The rest of the
forecast was left mostly untouched.  42
&&

.PREV DISCUSSION... /ISSUED 543 PM CST Mon Mar 5 2018/

AVIATION...
I did not make any significant changes to this evenings TAF Forecast
still looks on track for cooler temperatures and lower dew points
behind the front.package. The HRRR model has a pretty good
handle on the timing of the cold front that will move across the
Houston metro area between 00-03Z and off the coast between
04-05Z. The showers and thunderstorms associated with the front
this afternoon are decreasing in intensity as the front moves in
to a region dominated by a fairly strong a convective cap.

Winds will become Northerly at 10 to 20 knots behind the front
before leveling off at 8-10 knots overnight. The front may slow as
is moves off the coast, increasing overnight rain chances at KLBX
and KGLS.

Tuesday should be VFR at all terminals with mostly high clouds
and light north winds. 44

PREV DISCUSSION... /ISSUED 332 PM CST Mon Mar 5 2018/

NEAR TERM [Through Tonight]...

Surface analysis at 21Z has cold front from Caldwell/College
Station to Crockett with a line of showers and thunderstorms along
it. Storms are pulse type with a few cells peaking in intensity
and then weakening. A new updraft forms and does the same thing.
This may support a pulse strong storm with a downburst and small
hail, but given the trends, that possibility is rather low. Storms
are really struggling against the cap. AMDAR soundings from
airplanes early this afternoon show that cap closer to 750-700mb
rather than 800mb so there is some lift from the front which is
helping to force convection. Still there is plenty of dry air
entrainment which is helping to derail convective growth. With
convection weakening along the front, think that this may be the
trend for the afternoon through the overnight. Front is
undercutting most of the convection making it more elevated, but
it will be tough for a strong/severe storm to occur behind the
front with little support from upper level dynamics. Front still
could trigger storms along the coast with higher moisture but
overall confidence is low for severe weather and heavy rainfall.

SHORT TERM [Tuesday Through Thursday]...

Tuesday into Wednesday the upper level pattern becomes amplified
with a deep trough forming over the Great Lakes and Ohio River
Valley. NW flow aloft should keep conditions dry through the
middle of the week with surface high pressure building through the
plains. This should allow for below normal temperatures Wednesday
and Thursday with a warm up expected for the weekend. Overall
rather little in the way of weather impacts for mid week.

LONG TERM [Friday Through Monday]...

Return flow from the Gulf does increase Friday as high pressure
moves east. Moisture return may be a bit too aggressive with the
GFS but still worth a mention of a few showers starting on Friday.
Overall coverage looks to be isolated at best. A short wave
trough in the flow does move across TX and increase rain chances
going into Saturday mainly east of the area into Louisiana.

Another strong trough develops over the Midwest Saturday into
Sunday which helps push a cold front through Saturday night into
Sunday. Dry conditions should continue into early next week with
temperatures near or slightly below normal. Depending upon your
point of view, this may or may not be a good way to start spring
break for most people.

Overpeck

MARINE...

Cold front appears to be on track to move off the coast this eve-
ning. Scattered showers/thunderstorms will likely accompany this
line as it moves into the Gulf waters with moderate/strong north
winds developing in its wake. Small hail/gusty winds may also be
possible with the storms. Small Craft Caution or Advisories will
likely be needed starting overnight through Tue morning. Another
round of flags will be possible Tues night with the passage of a
secondary cold front which could bring colder air across the mar-
ine waters. THis offshore flow is expected to persist thru Thurs
before gradually veering onshore Fri. 41

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      47  71  41  63  38 /  30  10   0   0   0
Houston (IAH)              54  73  45  66  41 /  30  10   0   0   0
Galveston (GLS)            59  70  54  65  50 /  50  30   0   0   0

&&

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

$$

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Houston/Galveston TX
704 AM CST Mon Mar 5 2018

TXZ200-213-214-226-227-235>238-061315-
Brazoria-Chambers-Fort Bend-Galveston-Harris-Jackson-Liberty-
Matagorda-Wharton-
704 AM CST Mon Mar 5 2018

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

.DAY ONE...Today and Tonight
A cold front is likely to bring widespread showers and thunderstorms
to the region this afternoon and evening. Strong thunderstorms
will be possible and could bring small hail and gusty winds.
Heavy rainfall will be possible as storms develop and move
northeast along and ahead of the cold front. Rainfall totals 0.5"
to 1" are likely with isolated totals of 3 to 4 inches. The storms
should be ending after midnight pushing out into the Gulf.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
Dry weather Tuesday through Thursday with breezy conditions
possible near the immediate coast Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

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