Bhow wrote:Meso low 1 looks to be washing out around San Marcos followed by a new one near Uvalde. Been an odd radar presentation with all the spinning throughout the day in sctx.
Main circulation is SE of Houston
Moderator: S2k Moderators
Bhow wrote:Meso low 1 looks to be washing out around San Marcos followed by a new one near Uvalde. Been an odd radar presentation with all the spinning throughout the day in sctx.
bubba hotep wrote:Euro Weeklies say we carry this pattern well into June, with a large part of the state covered by the 6-8"+ mean
Iceresistance wrote:Surprise broken line just to my north
Brent wrote:Iceresistance wrote:Surprise broken line just to my north
We apparently gusted to 59 mph herealso the temperature dropped to 67 which is a big improvement over the last few nights at this hour
Cpv17 wrote:Brent wrote:Iceresistance wrote:Surprise broken line just to my north
We apparently gusted to 59 mph herealso the temperature dropped to 67 which is a big improvement over the last few nights at this hour
Before you know it those 60° dew points are gonna be all the way up to Canada.
gpsnowman wrote:About to get wet here. Got darker all of a sudden and some light rain is falling. Nice and cool outside also. On a side note, the drop down advertisements on the forum are driving me nuts!!
Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
330 AM EDT Wed May 10 2023
Day 3
Valid 12Z Fri May 12 2023 - 12Z Sat May 13 2023
...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL FOR PORTIONS OF
SOUTH-CENTRAL TEXAS...
TX...
An upper low is expected to move out of northern Mexico into TX to
the west of the track of the system crossing the state at this
time, strongly increasing low-level inflow up the Rio Grande and
into portions of the Escarpment towards 60 kts at 850 hPa.
Precipitable water values rise to 1.75-2", while CAPE should be
3000 J/kg or so. Convection with heavy rainfall is expected
Friday evening which should continue overnight. Conceptually, the
initial convective area should take roughly four hours to move --
any veering in the 850 hPa inflow is modest and towards Saturday
12z. Given the available moisture, 2.5-3" an hour totals cannot
be ruled out while the convection is stationary -- especially if
mesocyclones form -- which could pile up totals quickly. An
equally big concern would be if convection formed out ahead of the
developing complex -- particularly along the Escarpment -- once a
cold pool formed leading to cell mergers as the advancing
organized convection moves in to any preceding thunderstorm
activity. Other problems would be if a warm advection band formed
to its east-southeast which should be the eventual direction of
propagation parallel to the 1000-500 hPa thickness gradient or if
convection starts training on its western flank -- it's unclear
whether that would be in Mexico or South-Central TX closer to the
Rio Grande Valley. Some of the model guidance indicate that local
amounts in the 10" (00z Canadian Global, 00z NAM12, and 09/12z
ECMWF) or even 20" (Canadian Regional) range are possible should
the worst case scenarios play out. For now, an upgrade to a
Moderate Risk is being made which appears to be a conservative
move. Further elevation in the risk level is possible in later
cycles should the guidance get less dispersive while continuing to
show such significant heavy rainfall potential. The new Moderate
Risk area was coordinated with the CRP/Corpus Christi, EWX/New
Braunfels TX, and SJT/San Angelo TX forecast offices.
Edwards Limestone wrote:https://www.wpc.ncep.noaa.gov/qpf/99ewbg.gif
https://www.wpc.ncep.noaa.gov/#Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
330 AM EDT Wed May 10 2023
Day 3
Valid 12Z Fri May 12 2023 - 12Z Sat May 13 2023
...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL FOR PORTIONS OF
SOUTH-CENTRAL TEXAS...
TX...
An upper low is expected to move out of northern Mexico into TX to
the west of the track of the system crossing the state at this
time, strongly increasing low-level inflow up the Rio Grande and
into portions of the Escarpment towards 60 kts at 850 hPa.
Precipitable water values rise to 1.75-2", while CAPE should be
3000 J/kg or so. Convection with heavy rainfall is expected
Friday evening which should continue overnight. Conceptually, the
initial convective area should take roughly four hours to move --
any veering in the 850 hPa inflow is modest and towards Saturday
12z. Given the available moisture, 2.5-3" an hour totals cannot
be ruled out while the convection is stationary -- especially if
mesocyclones form -- which could pile up totals quickly. An
equally big concern would be if convection formed out ahead of the
developing complex -- particularly along the Escarpment -- once a
cold pool formed leading to cell mergers as the advancing
organized convection moves in to any preceding thunderstorm
activity. Other problems would be if a warm advection band formed
to its east-southeast which should be the eventual direction of
propagation parallel to the 1000-500 hPa thickness gradient or if
convection starts training on its western flank -- it's unclear
whether that would be in Mexico or South-Central TX closer to the
Rio Grande Valley. Some of the model guidance indicate that local
amounts in the 10" (00z Canadian Global, 00z NAM12, and 09/12z
ECMWF) or even 20" (Canadian Regional) range are possible should
the worst case scenarios play out. For now, an upgrade to a
Moderate Risk is being made which appears to be a conservative
move. Further elevation in the risk level is possible in later
cycles should the guidance get less dispersive while continuing to
show such significant heavy rainfall potential. The new Moderate
Risk area was coordinated with the CRP/Corpus Christi, EWX/New
Braunfels TX, and SJT/San Angelo TX forecast offices.
https://www.wpc.ncep.noaa.gov/qpf/ero_d45/images/d4wbg.gif
https://www.wpc.ncep.noaa.gov/qpf/ero_d45/images/d5wbg.gif
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