Our weather outlook across the nation looks quite active through the week. Our first storm wraps up over the Northeastern part of the country with significant winds and some snow along the coast. The second storm begins to take shape in the western part of the country with heavy rain along the coast and heavy snow for the higher elevations. The storm system will eventually move into the into the middle part of the country with rain and snow.
According to NOAA’s HPC 5 day precipitation forecast, the heaviest precipitation is expected to be across the western part of the country, especially in the higher elevations. Some spots through the early weekend could see as much 5″ to 7″.
The National Weather Service has issued winter weather headlines for places in the Sierra Nevada through Thursday:
..WINTER STORM WARNING IN EFFECT FROM 3 PM TUESDAY TO 11 AM PDT THURSDAY ABOVE 5500 FEET… THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A WINTER STORM WARNING ABOVE 5500 FEET FOR HEAVY SNOW…WHICH IS IN EFFECT FROM 3 PM TUESDAY TO 11 AM PDT THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * IMPACTS: GUSTY WIND AND HEAVY SNOW COULD BRING PERIODS OF SIGNIFICANTLY REDUCED VISIBILITY AND DIFFICULT TRAVEL CONDITIONS. CHAIN RESTRICTIONS AND TRAVEL DELAYS ARE LIKELY. * CONFIDENCE: HIGH CONFIDENCE IN PERIODS OF HEAVY SNOW AND STRONG WIND OVER HIGHER TERRAIN. * TIMING: SNOW BEGINS BY TUESDAY AFTERNOON WITH PERIODS OF SNOW INTO EARLY THURSDAY. HEAVIEST SNOW IS EXPECTED WEDNESDAY INTO WEDNESDAY EVENING. * LOCATIONS INCLUDE: LASSEN NATIONAL PARK…DONNER PASS…ECHO SUMMIT…CARSON PASS. * SNOW ACCUMULATIONS: 4 TO 8 INCHES ABOVE 4500 FEET…1 TO 2 FEET ABOVE 5500 FEET BETWEEN TUESDAY AND EARLY THURSDAY. * WIND: SOUTHWEST WIND GUSTS UP TO 45 MPH…LOCALLY HIGHER OVER REMOTE PEAKS.
The webcam from Boston, MA earlier Monday looked quite serene. This is all going to change heading into Tuesday and Wednesday as our big storm takes shape.
Here’s another spot that will look quite different by the middle part of the week. Back to that in a moment.
Rapid Storm Intensification
The same clipper system that was responsible for light snow accumulations across the Midwest will aid in the rapid intensification of a low pressure system off the East Coast Tuesday into Wednesday. The rapid intensification will go through a process known as “Bombogenesis” or at least a 24mb drop in 24 hours.
The image below shows the storm systems by AM Tuesday
Here’s the storm system by midnight Wednesday as the two storms have merged east of Virginia.
Note how much more intense the storm looks by Wednesday afternoon. The good news is that the storm will be moving quickly, so yes we expect lots of wind and some snow, but it will move quickly out of the region by Thursday.
Winter Weather Headlines
…BLIZZARD WATCH NOW IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY AFTERNOON… * LOCATIONS…CAPE COD…NANTUCKET AND MARTHA/S VINEYARD. * HAZARD TYPES…HEAVY SNOW…STRONG DAMAGING WINDS AND BLIZZARD CONDITIONS. * ACCUMULATIONS…SNOW ACCUMULATION OF 5 TO 10 INCHES WITH A LOW PROBABILITY FOR UP TO A FOOT OF SNOW ACROSS THE OUTER-CAPE AND NANTUCKET. * TIMING…VERY LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING. * IMPACTS…NEAR ZERO VISIBILITY IN HEAVY SNOW AND STRONG WINDS ARE POSSIBLE. BLOWING AND DRIFTING SNOW MAY MAKE TRAVEL ALMOST IMPOSSIBLE…ESPECIALLY FOR THE WEDNESDAY MORNING RUSH HOUR. IN ADDITION…STRONG WINDS MAY RESULT IN DOWNED TREES AND POWER OUTAGES. * WINDS…NORTH 25 TO 35 MPH WITH GUSTS UP TO 65 MPH. LOW PROBABILITY FOR A FEW GUSTS UP TO HURRICANE FORCE ACROSS THE OUTER-CAPE AND NANTUCKET. * TEMPERATURES…IN THE UPPER 20S AND LOWER 30S. * VISIBILITIES…ONE QUARTER MILE OR LESS AT TIMES.
Boston Snow Potential
The Boston snow meteogram doesn’t show quite as much snow for the cities as what it was showing in previous runs. The average between the models is around 2″ to 3″. The maximum is around 4.5″, but the minimum is nearly 0.
Thanks for checking in and have a great week ahead. Don’t forget to follow me on Twitter @TNelsonWNTV