|TUESDAY, JUNE 30, 2015
PARTLY CLOUDY AND WARM THROUGH TOMORROW WITH A CHANCE OF SCATTERED SHOWERS OR THUNDERSTORMS
Partly cloudy and warm today with a 40% chance of scattered showers or thunderstorms. High temperatures will range from the upper-80's in Galveston to the low-90's on the mainland. Expect southerly winds at 10-15 mph. We should see partly cloudy skies and mild conditions tonight with a 20% chance of showers or thunderstorms, increasing to a 30% chance after midnight. Overnight lows should range from the upper-70's in Galveston to the mid-70's on the mainland. Look for southerly winds at 10-15 mph.
Wednesday will bring partly cloudy skies with a 30% chance of scattered showers or thunderstorms. High temperatures will be near 90. Expect southerly winds at 10-15 mph. On Thursday we should see partly cloudy skies and warm conditions with a 20% chance of widely scattered showers or thunderstorms. Highs will range from the upper-80's on the island to the low-90's inland. Look for southerly winds at 10-15 mph.
SYNOPSIS AND OUTLOOK:
An upper-level trough to our east will continue to bring northwest winds aloft over our area. This, combined with a weak surface trough in south Texas will keep rain chances in our picture through tomorrow. Outflow boundaries from scattered thunderstorms will help to generate additional thundershowers.
This morning, high pressure is established over the central Gulf of Mexico with a tropical wave moving through the southern Gulf. A weak frontal boundary extends from the Red River of Texas northeastward to a low over western Kentucky. The front then continues on to another low over the Great Lakes and then on eastward to New York City and the New England coastal region. To the northwest, another cold front is pushing south into the northern Plains and upper-Midwest. Elsewhere, high pressure is over the Rockies while low pressure continues further west.
At the upper-levels, we still see a more more amplified flow. This is resulting in a low pressure trough over the eastern half of the country and a large high pressure ridge over the western half of the country.
Showers and thunderstorms remain possible as we move into mid-week. Rains will remain scattered with the sea breeze boundary and outflow boundaries from scattered areas of thunderstorms serving as the focus for precipitation. Surface high pressure will build west over the last half of the week, lowering rain chances some for Thursday and Friday.
The Tropical Atlantic Basin remains quiet overall and storm development is not expected at this time.