LOS ANGELES - As the US Midwest and East Coast thawed out from days of bitter, deadly cold, Californians on Friday battened down the hatches ahead of a fierce winter storm carrying heavy rains and high winds that could touch off urban flooding and mudslides.
Though the sun was out in Los Angeles on Friday afternoon and temperatures hovered in the low 60s Fahrenheit, the National Weather Service (NWS) said rain would begin to fall later in the evening and continue without let-up through Saturday night.
"This is a very big storm coming through Southern California" from the eastern Pacific Ocean, said National Weather Service meteorologist Rich Thompson.
The NWS predicted up to 3 inches of rain in coastal and valley areas with 7 to 8 inches forecast for mountain areas. Central and Northern California were also expected to be hit by rain and high winds.
Thompson said the weather service was not expecting the rain to be significant and sustained enough to cause widespread, damaging mudslides in areas left blackened and denuded of trees by major California wildfires late last year.
"There might be the potential for minor mud and debris flows. Traffic accidents, urban flooding. Things like that," he said, adding that trees could fall amid high winds and saturated soil and that coastal waters could be dangerous for boaters.
Winter storm watches were issued for the areas damaged by wildfires, including the foothills above the post seaside community of Malibu left blackened by the Woolsey Fire in November.
An Arctic air mass sent south by a disruption in the polar vortex jet stream brought bone-chilling cold to a large swath of the United States this week, causing more than a dozen deaths, closing schools and halting mail service.
The cold eased on Friday as the jet stream retreated, with temperatures forecast into the mid-40s to low 50s Fahrenheit through the weekend and Monday.
source: news.abs-cbn.com
An Arctic air mass blamed for the deaths of more than 20 people in the US began moving out to sea Friday, easing its grip on about a dozen states that have endured days of record-breaking cold.
And in an extreme but mostly welcome swing in the weather, forecasters were predicting that this week's deep freeze will be replaced by almost spring-like temperatures by the weekend.
The so-called polar vortex that descended on the US Midwest and Northeast will go down in memory for its scenes of winter at its most bitter.
Blocks of ice crunched down the river that runs through downtown Chicago, the Niagra Falls turned to solid ice in places, and half the Great Lakes were covered in ice.
US media reported as many as 21 weather-related deaths since a snow-storm hit the Midwest early in the week, followed by plunging temperatures Wednesday and Thursday.
Temperature readings were nosing up on Friday and "will continue to moderate," the National Weather Service said.
Now, though, the concern is the threat of flooding and further stress on already strained infrastructure as the region thaws out.
"In some areas of the Midwest, the coming wild temperature swing will be the most extreme warm-up from record winter cold ever seen in such a short time period," Jeff Masters, meteorologist at the firm Weather Underground, told AFP.
- Hundreds of new records -
The Arctic air mass that veered off its normal polar route broke more than 340 records in communities across a cluster of states, according to the Midwestern Regional Climate Center.
With wind chill factored in, temperatures dropped to as low as -53 Celsius in Minnesota, -51 C in Wisconsin, -58 C in Iowa and -48 C in Illinois.
By Monday, the weather was expected to be comparably balmy -- around 50F in Chicago and Detroit.
"It's important to remember that the rapid change in weather and snow melt could lead to dangerous flooding," James Joseph, the regional director of the Federal Emergency Management Agency (FEMA), said in a statement.
In the region around Niagara Falls, officials worried that ice jams could raise water levels in the Upper Niagara River, according to local TV station WIVB.
Niagara Falls Mayor Paul Dyster said they were also working "to avert possible creek flooding once thaw comes."
In Detroit and Chicago, which have already contended with dozens of broken water mains over the last several days, more pipes could burst as rapid warming puts pressure on aging systems.
- Death toll rises -
Hypothermia and frostbite proved to be major dangers.
The University of Iowa confirmed that among the dead was Gerald Belz, a pre-med student who died January 30. Local media reported that the 18-year-old was found unconscious outside a university building when temperatures were in the negative double digits in Iowa City.
A 38-year-old Wisconsin woman was found frozen Wednesday night in an unheated home, and a man froze to death in his back yard Thursday afternoon, the Milwaukee Journal Sentinel reported.
source: news.abs-cbn.com
