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Texas 2000 Weather Forecasting Page

Forecast discussion, Mon., Aug. 28, morning

 

Today's Update

Conditions are very similar to yesterday. Winds were light and southerly overnight except along parts of the immediate Gulf coast. Winds will be very light during the morning and become southeasterly during the early afternoon, with enhanced onshore flow with the bay/gulf breeze onset around 11-12. Profiler data from this morning show similar southerly flow aloft as yesterday, which will mix down during the day. By afternoon, winds will be from the S-SE at 10-15 knots. Clouds will evolve much like they did yesterday, with scattered cumulus building to a broken layer by late morning, then gradually thinning out as bay breeze subsidence and dry air entrainment aloft develop. Thundershowers can not be ruled out, especially in areas where low-level convergence is maximized near the gulf/bay breeze. Chance of precipitation is 15%. Background ozone levels are low, except for Galveston (32 ppb at 7 a.m.). Expect similar ozone levels as yesterday (on the low side), due to strong winds, vertical mixing, and low background levels. Highest ozone levels will be just north and east of the ship channel in early afternoon; just north of downtown in mid to late afternoon.

Max temperature upper 90s.

Quick Look at Tomorrow

No foreseeable change from today, with surface high pressure holding strong over the area. Should the high move westward (as the models are indicating), winds should be lighter and more easterly than today. Cloudiness and precipitation chances are similar to today.

Multi-Day Outlook

Same pattern holds until Wednesday. Extended-range models are developing a strong low pressure center east of Florida, such that by Thursday, we could begin to see the surface winds back around and become more northerly. If this happens, a convergence line could develop near Victoria (with southerly flow continuing south and west of this line), which would help to focus thuderstorm development later in the week. Should this convergence line remain well to our south, it won't be a cause of concern to us. With the flow coming off the continental U.S., background levels should be higher and allow us to see high levels of ozone in the afternoon, depending on the strength of the winds.

Forecaster Karl Schulze

 

 

 

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