Weather Underground Forecast for Tuesday, September 24, 2013.
A low pressure system in the western Gulf of Mexico will bring wet weather to the Gulf Coast states on Tuesday, and a separate low pressure system will continue to provide rain for the Pacific Northwest.
A lingering cold front will inch a bit farther into the Gulf of Mexico, but will stick around long enough to interact with a surface low and bring showers thunderstorms to the Gulf Coast states. This low pressure will likely only affect a few states, including southern Louisiana, Mississippi, Alabama, and Florida, as the system moves over water in the evening. To the north along the East Coast, a system of high pressure will bring drier conditions to the area, including more fall like weather. The Northeast and Mid-Atlantic states will experience temperatures in the 60s and 70s during the day, and temperatures will drop into the 40s and 50s at night. Humidity will also decrease as the high pressure system moves in on Tuesday.
Parts of the upper Midwest will experience rainy conditions as a cold front moves southeastward from the Plains and toward the Great Lakes. Parts of the Dakotas, Minnesota, Iowa, and Wisconsin can all expect wet weather in the forecast.
The Great Basin will stay mostly clear on Tuesday as a high pressure system moves over the central Rockies, while the Pacific Northwest can expect more rain in the forecast. A pair of low pressure systems will interact with a stationary front, which will cause rain and thunderstorms to occur over Washington, Oregon, Idaho, Montana, and even as far south as northern California and northern Nevada. The Southwest can expect warm, dry conditions throughout Tuesday.
Temperatures in the Lower 48 states Monday have ranged from a morning low of 23 degrees at Mt. Washington, N.H. to a high of 93 degrees at El Centro, Calif.