From Sean Bellafiore:
Beautiful weather is in the forecast today for Martin Luther King Jr. Day, but numerous to widespread showers are in the forecast starting late tomorrow night and lasting through early Thursday. Chilly morning temperatures in the upper 20s and low 30s should warm into the mid 50s this afternoon with generally sunny skies. We'll start to see some clouds move in this evening, but temperatures should drop back close to freezing by Tuesday morning as well. Although rain isn't expected during the day Tuesday, we're anticipating clouds to greatly increase. By the end of the afternoon temperatures will settle in the mid 50s with mostly cloudy to overcast skies signaling the rain to come.
A pair of upper-level storm systems approaches from the west starting late Tuesday night stretching into Thursday morning. As these storm system arrive, they'll tap into moisture in the atmosphere to provide high rain chances through Thursday. Scattered rain becomes more numerous late Tuesday night (mainly after midnight) from the west. Once rain begins in your area, off-and-on showers will remain in the forecast through Thursday morning. Although it won't be raining continuously, it may be raining more often than not during parts of the day Wednesday. Rain is expected to be generally light, but some heavier rain and even some rumbles of thunder are possible too, especially Wednesday night and early Thursday. Overall rain chances are near 70%, but those may need to be increased depending on how fast those storm systems arrive. By the time all the rain is finished, we're expecting a widespread accumulation between .25" and 1". Highest rainfall totals will be near and east of I-35.
Temperatures will be a bit chilly with the arriving rain too. Wednesday morning temperatures in the upper 30s and low 40s should only gradually warm into the mid 40s by the end of the day. Temperatures are anticipated to warm slightly Wednesday night into Thursday morning, likely settling in the upper 40s and low 50s by daybreak. As the rain moves out Thursday morning, temperatures should rebound into the low-to-mid 60s. A weak front passing through drops temperatures back into the 30s Friday morning, but highs should stay above normal in the afternoon as they climb into the low 60s. Another round of beautiful weekend weather is expected for the last weekend of January as highs reach the mid 60s with mostly clear to partly cloudy skies.