Severe Weather Team 6 Stories
- Remembering the 1977 Johnstown flood
- Strong storms cause damage in Somerset Co.
- Storms knock out power, tornado reported in Pa.
- Centre Co. attic fire may have been caused by lightning
- Firefighters warn about dangers of extreme heat
- Ahead of July 4th, East Coast eyes tropical storm
- Evacuation in place for residents in part of Somerset Co.
- Wicked weather blows through Bedford Co.
- Storm cleanup underway in Bedford Co.
- Elk County to get fed disaster help for flooding
- Elk Co. flood damage assessments continue
- Red Cross service center changing locations in Elk Co.
- Help for flooding victims can be found at Ridgway Fire Hall
- Flood recovery continues in Elk Co.
- Federal officials, local representatives reviewing Elk Co. flood impact
- ATA helps seniors impacted by flooding
- Ridgway businesses cleaning up, working to reopen quickly
- Residents relying on each other for help in flood recovery
- Ridgway Fire Department assisting with flooded basements
- State officials surveying Elk Co. flood damage
- Recovery begins in Elk County after massive flooding
- People rescued from severe flooding in Elk County
- Residents forced to evacuate homes as flood water rise
- Ridgway officials already planning to prevent next flood
- Johnsonburg flooding worst in recent memory
- Covering flood damage has residents concerned
- Clearfield Co. school children evacuated from rising waters
- More than 100 people evacuated in Elk Co. flooding
- Residents shocked by flooding in Elk Co.
- Major flooding in Elk County
- Most Huntingdon Co. roads reopening from flooding closures
- Several Huntingdon Co. roads closed due to flooding
- Strong winds bring down power lines, knock out power
- Early morning earthquake rattles Los Angeles
- PennDOT finds 35K tons of road salt
- Area superintendents dealing with significant amount of snow days
- WEB EXTRA: What is a polar vortex?
- Severe Weather Team 6 Coverage: Winter Weather Tips
- STORM UPDATE: Tuesday Noon Forecast
- 2013 WinterCast
- Investigation: Officials blame DEP ruling for current flooding
- Flooding reported in Somerset County
WEB EXTRA: What is a polar vortex?
Updated: Monday, January 6 2014, 11:20 AM EST
By: WJAC Web Staff
JOHNSTOWN, Pa. -- As the viewing area braces for some of the coldest air that residents have experienced in nearly 20 years, there has been a lot of talk about what is causing the unusually cold air.
6 News Chief Meteorologist Jim Burton said the cause of the bitterly cold air is the polar vortex, an upper level low. The air mass is usually north of the Hudson Bay in Canada, but on some occasions the cold air moves further south.
In this case, the air mass has encompassed a large portion of the United States, including the Great Lakes region, Mid Atlantic and New England.
The polar air will drop temperatures to near or below zero and cause wind chills to plummet 20 to 40 degrees below zero.