RJ Sangosti / MediaNews Group / Denver Post via Getty Images
A weather whip is expected to hit people in the Rockies and Plains this week, as conditions go from pale to blizzard overnight. The high is expected to be about 80 degrees in Denver, Colo, and other cities on Tuesday – but within 24 hours, snowstorm conditions are expected, National Weather Service said.
"Warm today. Snow tomorrow", says NWS Denver and Boulder office predicting temperatures that could hit record highs Tuesday – followed by rain turning to the snow in a cold air jet that will ride wind at 40-60 mph on Wednesday.
For many Central American residents the week began with warnings of a possible winter weather. But predictions now require an April blizzard that can cause whiteout conditions. And due to the sharp drop in pressure, the system could develop into the region's second bomb cyclone in less than a month.
In addition to snow, residents could see dangerous floods, including in cities in Nebraska, Iowa, Minnesota and along the Missouri River, where people still handle the effects of last month's floods.
"Heavy snow will evolve in the mountains on Wednesday morning and then spread across the plains Wednesday afternoon," says NWS office in Boulder. The agency's snowstorm warning for northeast Colorado applies from noon Wednesday to noon Thursday.
Snowstorm warnings are now issued in several states, from Dakotas and Colorado to parts of Iowa, Nebraska and Minnesota.
The storm came in the lake from the Pacific on Sunday and Monday, causing heavy rain and flooding to Oregon, where evacuation orders were issued in the Eugene area, Oregon Public Broadcasting reported Monday . It is also expected to cause problems in Idaho and Montana as it comes closer to the expected cold air meeting.
"The snow is expected to develop on Wednesday morning over the higher terrain and spread to the east," said the National Weather Service Office in Colorado. "Precipitation is expected to begin as rain, but switch to snow during the day as colder air moves into the area."
As to how much snowfall can accumulate, the forecasts say that it is still uncertain in some areas – but in general the snow totals may resemble last month's snowstorm. Parts of South Dakota could see more than 24 inches of heavy, wet snow, The NWS office in Sioux Falls says. Other areas of the state and surrounding areas can only see a few inches.
The latest update of expected snowfall amounts to the coming April snowstorm. The rain will develop tonight and gradually switch to snow on Wednesday and Wednesday night, so continue until early Friday. pic.twitter.com/82tGlbq066
– NWS Sioux Falls (@NWSSiouxFalls) April 9, 2019
The sudden repentance resembles how the inland bomb cyclone formed in March when the weather in the Rockies and Great Plains changed from clear skies and temperatures in the 50's and 60's to rain, snow and howling winds.
It is not unusual for these parts of the United States to experience fluctuations from hot temperatures to snow in the spring. But the intensity of the upcoming switch has caught the attention of forecasters – and they warn people to keep a cautious eye on issues that could quickly become dangerous.
"We usually get a winter road once in April", National Weather Service Kari Fleegel told South Dakota Public Broadcasting's Gary Ellenbolt. "However, amounts that we have forecast right now are rather rare. Some of this may be a record area."
The NWS office in Aberdeen, where Fleegel is based, urges people to change their travel plans to count on a storm that it now expects to bring snow in two waves, from 3:00 to 6:00 Wednesday and from pm. 3 to Thursday to 6 am Friday.
The result the office says adds up to a "potentially historic spring key".
Tomorrow, the Twin Cities announced the NWS office residents "Have you taken your winter safety products out of your car for the season?" Time to put them back in your vehicle. "
If you are wondering about the" bomb cyclone "term, we reported last month:
" Meteorological term "bomb cyclone" refers to a storm that intensifies very quickly through a process called bombogenesis, in which barometric pressure drops by at least 24 millibars within 24 hours. That is what happened in parts of the central United States, where only one day before the snowstorm hit, many areas such as Denver enjoyed sunny in the 50s and 60s. "