Weather Underground Forecast for Thursday, Oct. 31, 2013.
A cold front will inch into the Pacific Northwest on Thursday, while a separate, more extensive cold front will stretch from the southern Plains to the upper Midwest.
Wet weather will begin to affect the Pacific Northwest on Thursday as a cold frontal boundary moves over the region. Rain will push across Washington, Oregon and the northwest tip of California, while high elevation snow will be possible in the Cascades. Low pressure will also trigger snowy weather throughout the central and northern Rockies on Thursday, as heavy snow will be possible in parts of Montana. The Southwest will stay clear of precipitation as a ridge of high pressure is expected to build along southern California and Arizona.
Further to the east, a cold front will extend from Texas to Wisconsin, which will bring wet weather to a number of regions. Rain and thunderstorms can be expected along the southern Plains, through the Mississippi Valley and into the upper Midwest. Severe thunderstorms and flash flooding will be possible in several states due to this frontal boundary. States that can expect severe thunderstorms and flash flooding include Texas, Louisiana, Arkansas, Mississippi and Alabama, while strong thunderstorms will be possible throughout the Tennessee Valley and Ohio Valley on Thursday. The majority of the Eastern Seaboard will stay clear of stormy weather, with the exception being Florida, where spotty thunderstorms will be possible along the southeast coast.
Temperatures in the Lower 48 states Wednesday have ranged from a morning low of 8 degrees at Butte, Mont. to a high of 96 degrees at Hollywood, Fla.