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Weather forecasting and analysis, space and historic events, climate information
Filtering by Category: HSV
A mild and relatively dry stretch of weather should into the upcoming weekend, but the quiet pattern is likely to end next week. Signs point to a possible severe weather outbreak across the southern states by Tuesday or Wednesday of next week...something we’ll closely monitor in the days to come.
Read MoreToday’s weather features above-normal temperatures across much of the nation and the next couple of days will remain on the mild side in the Mid-Atlantic region with high temperatures approaching 60 degrees in some areas. We are about to flip the calendar from February to March and it appears quite likely that there will be occasional cold air intrusions from Canada into the US during the next few weeks. Supporting evidence for additional cold air outbreaks during the month of March include the strong likelihood of a “disrupted” stratospheric polar vortex with significant warming near the North Pole by the middle of March and the movement of a tropical disturbance known as the Madden-Julian Oscillation (MJO). These occasional cold air outbreaks will contribute to an overall active weather pattern in the month of March and likely set the stage multiple severe weather outbreaks. In addition, the continuing cold air intrusions will certainly keep hope alive for snow lovers with multiple upcoming chances; especially, across interior higher elevation locations of the northern Mid-Atlantic and Northeast US.
Read MoreToday’s weather features above-normal temperatures across much of the nation and the remainder of the week will be generally on the mild side including in the Mid-Atlantic region where high temperatures of 60+ degrees will be commonplace. As nice as it may feel during the next few days, it appears likely that additional cold air outbreaks will make their way from Canada into the US during the next few weeks and this “back and forth” in temperatures could set the stage for multiple severe weather outbreaks during the month of March perhaps with a focus in the region from the Gulf coast to the Tennessee Valley. As the new month progresses, increasing strength of the sun will allow for warmer air masses to develop down across the southern states and any incoming cold air mass from Canada can produce “clash zones” with the prospects of severe weather. One such threat could take place next week somewhere in the middle of the nation with cold air from the north and west pushing towards warm, humid air to the south and east and there can be a repeat performance in the week to follow.
Read MoreA mild and relatively quiet week continues across the Tennessee Valley with today’s high temperatures in the middle 60’s to go along with mainly sunny skies. A shower or two is possible on Wednesday night and Thursday; otherwise, dry conditions should accompany the mild temperature pattern through the upcoming weekend.
Read MoreA mild and relatively quiet week in the Tennessee Valley with the 60’s for highs likely on most days and we could touch 70 degrees at mid-week. A shower or two possible on Thursday; otherwise, dry conditions will accompany the mild temperatures.
Read MoreArctic high pressure that has dominated the weather pattern during the past few days will finally weaken and shift to the east of here as we move into the weekend. As such, temperatures will begin a climb from afternoon highs in the 30’s today to near 50 degrees on Sunday and then the middle 60’s are on the table during the first half of next week.
Read MoreArctic air covers much of the nation again today with a continuing tight grip on the central states where numerous daily low temperature records have been set all the way from the Dakotas to Texas and, in a few cases, monthly low temperature records have been challenged. The average temperature across the continental US earlier today was 15.0°F below the average for this time of year and, in a few spots, temperatures were between 45 and 50 degrees below the average (e.g., Nebraska, SW Missouri). Temperatures will gradually moderate over the upcoming weekend and next week promises to feature above-normal temperatures across a wide part of the nation. It is, however, quite likely that additional very cold air masses will be able to make their way from northern Canada into the central and eastern US as the month of March gets underway.
Read MoreArctic air covers much of the nation today with a particularly tight grip on the central states where numerous daily low temperature records have been set all the way from the Dakotas to the Rio Grande Valley region of southern Texas. The average temperature across the continental US earlier today was 15.4°F which is well below normal for this time of year and only the state of Florida could boast about warm weather conditions.
In addition to the widespread cold, accumulating snow fell yesterday across portions of the Middle Mississippi Valley and significant snow today will spread from the Tennessee Valley to the southern Mid-Atlantic region. The DC metro area will be on the northern edge of today’s “southern stream” system and can receive a coating to an inch or so; especially, across the southern suburbs. On Thursday, a “northern stream” wave in the upper atmosphere will pass right over the Mid-Atlantic region and likely result in some snow or snow shower activity in the DC-to-Philly-to-NYC corridor. The week ends with yet another very cold and windy day on Friday in the Mid-Atlantic region with well below normal temperatures and even lower wind chill values.
Read MoreArctic high pressure dominates the scene over the eastern 2/3rds of the nation and will continue to do so for another couple of days. Low pressure is organizing this morning over the northern Gulf region and it can produce snow showers and some ice in the area through the morning hours and small snow/ice accumulations are possible. Temperatures will begin a warming trend on Friday climbing to near 40 degrees and 60+ degree highs will be possible around here by Monday afternoon.
Read MoreArctic high pressure dominates the scene over the eastern 2/3rds of the nation and will continue to do so for another few days. After a brief warm-up today, high temperatures will be reduced to the 30’s on Wednesday and no better than 30 degrees on Thursday. Overnight temperatures can drop to bitter cold levels of the low-to-middle teens by early Thursday morning across the northern part of Alabama.
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