RIO GRANDE VALLEY:
Today’s high temperatures/low temperatures in the Rio Grande Valley:
Tonight, expect clear skies with lows in the upper 40s/lower 50s. Winds will be out of the southeast at 7-12 mph. Patchy fog will develop after midnight.
(1/23/2011): Tomorrow will be warm, with temperatures in the lower-to-mid 70s and winds out of the southeast. Clouds will begin to increase, as another cold front approaches the Valley. The cold front will arrive in the late afternoon/early evening hours. After the front passes, winds will be out of the north-northwest at 10-15 mph. There will be a chance (20%) of light rain and drizzle, especially closer to the coast (30%), along and ahead of the front. Tomorrow night will be mostly cloudy with lingering drizzle and showers. Lows will be in the upper 40s/lower 50s with winds out of the north-northwest at 10-15 mph, and higher gusts.
(1/24/2011): On Monday, skies will be mostly cloudy with highs in the lower 60s. Computer models all agree on a developing surface low along the south TX coast, increasing rain chances on Monday, especially near the coast. There is also upper-level support, as a trough at 500mb digs south towards S. TX. As far as how much rain will fall depends on where the low and precipitation starts to develop. I believe if any rain does fall on Monday, it will be light. Winds will be out of the north-northeast at 10-15 mph. Monday night, lows will be in the mid 40s; clouds will begin to start clearing after midnight.
(1/25/2011): Tuesday will be mostly sunny with highs in the mid-to-upper 60s. Winds will be breezy out of the north at 12-17 mph, and higher gusts. Tuesday night will be partly cloudy with east-northeast winds at 5-10 mph. Lows will be the mid 40s.
Edinburg 3-day Forecast:
(1/23/2011): 72/45…Increasing clouds…Winds SE then NNW at 10-15 mph G22…20% chance of light rain
(1/24/2011): 60/46…Mostly cloudy…Winds NNE at 10-15 mph…20% chance of showers
(1/25/2011): 70/44…Mostly sunny… N winds switching to E at 12-17 mph
REST OF THE NATION:
A weak surface low, located in southeast NM will be relocating east, that will bring a cold front through the RGV Sunday evening. This low is not a big precipitation maker, as it will combine with an arctic cold front in northern MO and will bring light rain and snow for MO and then dissipate by Monday.
A mid-level trough, in conjunction with the arctic front that is located in the north-central CONUS, is causing snow to fall in eastern NE, western IA, and northwest MO will continue digging southeast, giving MO more snow Sunday into Monday. Winter weather advisories and winter storm warnings are currently out.
Another surface low pressure system from Canada will cross the border early Monday morning, bringing more snow for ND and MN and eventually WI.