A sudden change with colder air and brisk conditions will shock residents of the southern Plains and Texas into this weekend, making it feel like winter has arrived.
A cold front, referred to as a blue norther, will sag southward ushering the chilly air across the southern Plains on Friday and northern Texas on Saturday. Highs will drop 20-30 degrees behind the front with breezy conditions adding to the chill.
The cold front is associated with a storm that unleashed the first snow of the season in portions of North Dakota and Minnesota.
Following a high in the 70s in Oklahoma City on Thursday, the temperature will only climb into the upper 50s on Friday.
After the blue norther moves through northern Texas, highs will top out in the mid-40s and low 50s in the Texas Panhandle on Saturday. This may come as a shock following the first few days of October with highs climbing well into the 70s and 80s.
The high in Dallas will be almost 30 degrees cooler on Saturday compared to Friday, plummeting from the mid-80s to the mid-50s. Highs in the mid-50s are more reminiscent of mid-December for Dallas. Breezy conditions and showers will add to the drastic changes.
Meanwhile, the chilly push of air will not make it through central Texas. San Antonio and Austin will have breezy and warm weather with highs in the upper 70s or low 80s.
What is a Blue Norther?
A blue norther is a cold front that brings much cooler air to the Plains and Texas, often with very sudden changes. The wind switches from a southerly direction to a northerly direction when these fronts pass through an area.
"You can get a high of 85 degrees, and then a high in the 30s or 40s the next day with rain," AccuWeather Expert Senior Meteorologist Joe Sobel said. He added that northern Texas, especially the panhandle, has some of the most changeable weather in the U.S.
There are two different explanations that describe the origin of the term "blue norther," Sobel said. One is that is gets so cold that people who stand outside will turn blue. The second is that clearing with blue skies and much cooler weather often occurs behind a blue norther.
Following a southward push of cool, dry air at midweek, clouds, showers and higher humidity will return to the Northeast.
El Nino is forecast to last into the fall of 2015, but will it be enough to break expanding drought conditions along the Pacific coast of the United States?
Another round of storms will fire across the northern Plains at midweek with the chance for isolated tornadoes.
Andres has begun to weaken over the eastern Pacific, but a new threat has developed closer to Mexico.
The weather pattern that delivered drenching rain and flooding to Texas and the southern Plains during May will soak the Southeast states for the next week or two.
With summer just around the corner, many in the United States are preparing for exciting outdoor activities, but coupled with the summer fun comes the return of the pesky and potentially disease-ridden mosquito.
Cloudburst near Pikes Peak killed 120 people; Pueblo, CO, flooded by 25-foot crest of Arkansas River.
Violent thunderstorms and tornadoes; 13 confirmed tornadoes in western PA (most from any outbreak). Widespread wind damage in eastern PA. Wind gusts of 80 mph at ABE and RDG. One person killed in Philadelphia by a falling tree. Largest tornado outbreak in 35 years in western PA.
Harrisburg, PA (1985)
Golf ball-sized hail and 60 mph winds.