Aikyam-Lab/Synoptic-Bench huggingface dataset:
Tonight, dry air will move in although in the lower levels some moisture will remain therefore a chance of showers is possible. Due to cloud coverage sticking around through tonight, temperatures will not change much between today and tonight with lows being in the lower 70s and current temperatures across the island chain in the lower 70s as well. From synopsis, an area of weak low pressure over the southeastern Gulf of Mexico will continue moving northeastward this afternoon and tonight resulting in gentle to moderate breezes. As the low pulls away Saturday, breezes will slacken to light to gentle.
215 PM CST Fri Jan 17 2025 - Warmer than normal temperatures this afternoon with highs in the 30s to 40s. - A cold front pushes through the area with gusty winds of 30-40 mph and scattered flurries/snow showers late this afternoon through the overnight.
1121 AM CST Fri Jan 17 2025 - Mild again today, but a cold front moves through the region this afternoon/evening.
1131 AM CST Fri Jan 17 2025 Updated at 1124 AM CST Fri Jan 17 2025 - Cold front arrives Friday - very warm ahead of it, and much colder behind it.
1111 AM CST Fri Jan 17 2025 - There is a 40% chance of snow squalls this afternoon along and behind a strong cold front. - Strong northwest winds behind a cold front will produce wind gusts of 35 to 50 mph along the North Shore tonight.
Snow accumulations are likely to remain below half an inch for most locations, though isolated totals up to an inch are possible in the higher terrain of NW AR. - Warmer temperatures expected by mid week. primarily in the higher terrain where slightly heavier QPF is favored.
- A cold front is moving through the region this afternoon/evening.
As a warm front lifts to the northeast after midnight, plenty of lift along with moisture advection from the southwest will develop widespread showers over much of the area, with a rumble of thunder or two not out of the question across the U. The highly advertised arctic front will begin to enter our northwest counties by 6pm Saturday with a rapid cool down expected during the evening hours.
538 PM CST Fri Jan 17 2025 Updated at 536 PM CST Fri Jan 17 2025 - Cold front moves across area through tonight.
304 PM CST Fri Jan 17 2025 - Rain will move in tonight ahead of a cold frontal passage, which will also usher in much colder temperatures behind it.
In the wake of the rain Saturday morning, compressional heating in advance of the approaching cold front should warm temperatures well into the 60s to lower 70s across a good portion of the area. Temperatures are likely to drop quickly by Saturday afternoon as a cold front begins to surge southward into northern portions of the area - about 20 deg F in 6 hours.
536 PM CST Fri Jan 17 2025 - Warmer than normal temperatures this afternoon with highs in the 30s to 40s. - A cold front pushes through the area with gusty winds of 30-40 mph and scattered flurries/snow showers late this afternoon through the overnight.
521 PM CST Fri Jan 17 2025 - An arctic cold front will bring strong northerly winds of 20 to 40 mph across our area this afternoon and evening.
300 PM PST Fri Jan 17 2025 A lot of the freezing fog has cleared out, although fog and some stratus is lingering in a few of the valleys this afternoon as high pressure remains in control. Some higher clouds are also moving overhead filtering out the sun and keeping temperatures on the cooler side this afternoon. Given the persistent moisture trapped in the valley, its hard to see freezing fog not forming again in the Rogue, Illinois and Umpqua valleys with clear skies to the east and south. By Saturday afternoon, we are watching a coastal thermal trough as temperatures stay warm around the Brookings area.
Early evening KTBW radar imagery is showing areas of light rain lifting north through southwest Florida ahead of a warm front that is forecast to pass through overnight.
- An Arctic cold front will cross southern Wisconsin this evening, allowing a frigid air mass to begin working into the region.
804 PM CST Fri Jan 17 2025 - There is a 40% chance of snow squalls this afternoon along and behind a strong cold front. - Strong northwest winds behind a cold front will produce wind gusts of 35 to 50 mph along the North Shore tonight.
523 PM CST Fri Jan 17 2025 - Cold front arriving this afternoon and evening.
547 PM CST Fri Jan 17 2025 - Well above-normal temperatures and windy conditions expected this afternoon, followed by a strong cold front passage tonight into Saturday.
313 PM CST Fri Jan 17 2025 - Cold front arriving this afternoon and evening.
545 PM CST Fri Jan 17 2025 - Rain will move in tonight ahead of a cold frontal passage, which will also usher in much colder temperatures behind it.
911 PM CST Fri Jan 17 2025 - Rain will move in tonight ahead of a cold frontal passage, which will also usher in much colder temperatures behind it.
1057 PM CST Fri Jan 17 2025 - Well above-normal temperatures and windy conditions expected this afternoon, followed by a strong cold front passage tonight into Saturday.
124 AM MST Sat Jan 18 2025 The chill is officially on across eastern Idaho as Arctic air is quickly filtering in to the region behind a cold front that pushed through during the day on Friday.
1146 PM CST Fri Jan 17 2025 - Rain will move in tonight ahead of a cold frontal passage, which will also usher in much colder temperatures behind it.
1137 PM CST Fri Jan 17 2025 - Strong northwest winds behind a cold front will produce wind gusts of 35 to 50 mph along the North Shore tonight.
1103 PM CST Fri Jan 17 2025 - Warmer than normal temperatures this afternoon with highs in the 30s to 40s. - A cold front pushes through the area with gusty winds of 30-40 mph and scattered flurries/snow showers late this afternoon through the overnight.
1125 PM CST Fri Jan 17 2025 - Cold front arriving this afternoon and evening.
920 PM CST Fri Jan 17 2025 - An Arctic cold front will cross southern Wisconsin this evening, allowing a frigid air mass to begin working into the region.
234 AM EST Sat Jan 18 2025 A cold front will cross the area late afternoon into tonight.
241 AM CST Sat Jan 18 2025 - A cold front sweeping through the region today will bring decreasing rain chances and much colder air.
1133 PM CST Fri Jan 17 2025 - An arctic cold front will bring strong northerly winds of 20 to 40 mph across our area this afternoon and evening.
As of 10 PM local time, very preliminary 24 hour rainfall totals in the Lower Keys were near one inch while the Middle and Upper Keys totals closer to a quarter of an inch. Since this area of heavier rainfall tracked across and near the Lower Keys, this is where we expect highest rainfall totals. From synopsis, an area of weak low pressure over the southeastern Gulf of Mexico will continue moving northeastward overnight resulting in gentle to moderate breezes. As the low pulls away Saturday, breezes will slacken to light to gentle.
Some scattered snow flakes may start to mix in as it exits where temperatures are closer to freezing.
548 AM CST Sat Jan 18 2025 - A cold front sweeping through the region today will bring decreasing rain chances and much colder air.
Snow accumulations are likely to remain below half an inch for most locations, though isolated totals up to an inch are possible in the higher terrain of northwest Arkansas.
The next chance at precipitation wonât be until next Saturday as a weak system clipping eastern Nevada has the potential to bring a few snow showers across the higher elevation terrain. Saturday and Sunday Quiet weather pattern continues thanks to Rex blocking pattern over the eastern Pacific. Nevada will remain under N to NW flow aloft thanks to the aforementioned Rex block, which is a pattern that consists of a upper level high pressure ridge directly north of a cutoff upper level low pressure area. The pattern wonât be completely monotone, as periodic dry tailing cold fronts will push through increasing clouds and dropping temperatures, but providing little actual moisture.
559 AM EST Sat Jan 18 2025 A cold front will cross the area late afternoon into tonight. A cold front will approach from the west with a weak area of low pressure forcing along a weak warm front over New England today. This setup should allow on of the warmer day we've had in awhile, with highs around 40s on the coast and across the south. Low pressure is expected to form well to our south along the cold front that passes through here Saturday evening. The low will quickly move northeastward Sunday.
Still have a tight pressure gradient over the area, yet not as tight as it was yesterday with the high winds.
633 AM EST Sat Jan 18 2025 (Today through Sunday) Conditions will gradually improve today as a warm front gradually lifts across the Florida peninsula. Areas near Lake Okeechobee will near the low 70s during peak daytime heating. Another area of low pressure will progress across the southeastern US this weekend, dragging a cold front through the Florida peninsula on Sunday. Chances for rain will increase to the 40-50% range upon its approach sometime Sunday evening, with a probability gradient from NW to SE where the highest chances remain near the Lake region. Temperatures will once again remain warm as flow remains southerly/southwesterly; highs will reach the low to mid 80s during the afternoon.
Surface analysis places a weak area of low pressure just east of the Florida First Coast continuing to push into the western North Atlantic, with another frontal zone approaching the Gulf States This places the Florida Keys in light to gentle south to southwesterly flow, promoting warm and fair weather conditions. From synopsis, an elongated weak area of low pressure east of the Florida First Coast will continue to pull away this afternoon.
High temperatures will be a little cooler today but still a few degrees above average for this time of the year.
Fog and low stratus have filled in the Rogue, Umpqua, Illinois, and Applegate valleys this morning as high pressure remains in control overhead. Despite this low level moisture, just above the inversions there is very dry air in the mid layers with lighter east flow aloft, keeping the higher terrain and the East Side under clear skies.
415 AM CST Sat Jan 18 2025 - Potential for a light accumulation of snow mainly across northwest Nebraska toward the Pine Ridge through tonight.
538 AM CST Sat Jan 18 2025 - Potential for a light accumulation of snow mainly across northwest Nebraska toward the Pine Ridge through tonight.
1130 AM CST Sat Jan 18 2025 - Potential for a light accumulation of snow mainly across northwest Nebraska toward the Pine Ridge through tonight.
This next bout of cold will be much colder, dropping most into the low single digits and into the negatives.
1014 AM EST Sat Jan 18 2025 A cold front will cross the area late afternoon into tonight. A cold front will approach from the west with a weak area of low pressure forcing along a weak warm front over New England today. This setup should allow on of the warmer day we've had in awhile, with highs around 40s on the coast and across the south. Low pressure is expected to form well to our south along the cold front that passes through here Saturday evening. The low will quickly move northeastward Sunday.
Upper longwave trough continues to deepen from Hudson Bay through the Plains states and into S TX today with phased southern stream developing a potent Deep South surface storm system that will move eastward tonight then off the mid Atlantic coast Sunday. The attendant cold front is expected to move from the N Gulf into the Big Bend area late tonight, then the FL Peninsula during the day Sunday.
Snow accumulations should be light, but the colder it is, the higher the snow-liquid-ratio, so will expect some over- achieving amounts.
A cold front is just about through the entire Mid-South.
Satellite image shows low clouds and patchy to areas of fog and freezing fog in the Umpqua Basin, Illinois Valley, Grants Pass area and Rogue Valley. the low clouds and fog are expected to persist through the morning, followed by a gradual burn off in the afternoon.
The coldest air mass of the winter season settled into the region, including the Boise Airport where the low was 16F.
1127 AM CST Sat Jan 18 2025 - A cold front sweeping through the region today will bring decreasing rain chances and much colder air.
Early evening IR satellite and regional radar imagery is showing bands of showers and storms approaching the Nature Coast ahead of the next cold front. Bands of showers and thunderstorms are also forecast to push southeast through the area ahead of a cold front, reaching the Tampa Bay area terminals by around 12-14z, and reaching the southwest Florida terminals by around 16-18z, although the convection may already be dissipating before reaching southwest Florida. A cold front approaching the waters will push southeast into the waters early Sunday, with showers and thunderstorms developing ahead of the front, along with building winds and seas.
The high resolution models also show the potential for lake-enhanced snow for Flathead Lake Sunday morning. Because of the increased cloud-cover and light snow, the lows Sunday morning have trended milder.
Clear skies and light winds have allowed temperatures to cool rapidly after sunset and all areas are now below freezing with mountain locations already in the single digits.
The forecast has been updated to reflect the likelihood of patchy fog in the Lower and Middle Keys until 1 AM. Other than the addition of fog to the Lower and Middle Keys, no changes are needed to the current forecast package. A Dense Fog Advisory is in effect for the Florida Keys coastal waters north and west of the Lower and Middle Keys, including the Bayside, Gulfside, and southeastern Gulf of Mexico.
Temperatures are still above freezing areawide, albeit, not for long.
Evening update: Patchy to localized areas of freezing fog will be the main impact tonight, especially over the West Plains of Spokane into portions of northern Whitman County, heading toward the upper Columbia Basin largely north of Ritzville.
-Temperatures warm back above freezing midweek. A mid-level broad troughing pattern persists across the CONUS today. At the surface, high pressure continues to expand southward over the forecast area and north winds remain breezy this morning.
Winds are expected to diminish by Monday morning as a strong 1050 mb high-pressure system establishes itself along the Continental Divide, though drainage winds may continue for areas such as the Missoula valley.
123 AM PST Sun Jan 19 2025 * A brief cooldown later tonight into Monday with gusty winds across ridges. In addition to the cold temperatures, east to northeast winds will increase upwards of 60-80 mph on ridges, with up to 35 mph on Lake Tahoe.
The upper level pattern will feature troughing to the east with ridging off the West Coast over the next few days.
For Monday, a new H500 trough will approach from the NW. This will help usher in additional cold air as a robust area of surface ridging will be making its way down the Plains toward Arkansas.
Light snow expected to linger in the higher elevations east of I-15 through today, with occasional light showers over the central mountains arriving through the afternoon. Given the low moisture content but cold temperatures, additional accumulations should stay below an inch.
The coldest spot as of 2 pm is the high-level location in the Glacier Region, Sperry Chalet, which is reporting an air temperature of 4 below zero, and a wind chill of 24 below. The highest probability for lows of 20 below or colder exist along the Divide and points west, including Polebridge, Seeley Lake, Ovando, Potomac, Georgetown Lake, Butte, and other high valley locations across southwest Montana.
1202 PM PST Sun Jan 19 2025 * A brief cooldown later tonight into Monday with gusty winds across ridges. In addition to the cold air intrusion, east to northeast winds will increase upwards of 70-90 mph on ridges, with up to 35 mph on Lake Tahoe.
As anticipated, dense fog blanketed the cooler marine zones north of the Florida Keys overnight through around sunrise. GOES-16 satellite-derived MVFR and IFR probability products clearly depict the low ceilings and fog have since receded well northward, with mostly sunny skies enveloping the Keys and the adjacent nearshore and offshore coastal waters. Available local radars as well as lightning products highlight the leading edge of the next cold front approaching the central Gulf of Mexico. A cold front is expected to approach the Keys this afternoon, resulting in light to gentle southwesterly breezes.
Surface analysis places a cold front stretching from the southwestern Gulf of Mexico northeastward through the Florida Peninsula. Upper- level composite analysis places an amplified longwave trough across much of the CONUS, with a stagnant ridge over the Pacific west coast. The cold front will push through the Keys from northwest to southeast this evening through the predawn Monday morning hours. Unlike several of our past cold fronts so far this year, moisture associated with this front is expected to linger, and several periods of mostly cloudy skies and occasional showers is expected.
Monday night looks to be continued cold as well, but a few degrees warmer than tonight in most places and less wind.
Localized 2 inch amounts possible for the highest spots.
Satellite image shows low clouds and fog and freezing fog in the same areas as in previous mornings. A freezing fog advisory remains in effect until 10 am pst, therefore allow extra time to your destination as some of the roads will be slick, especially on overpasses and bridges.
Cold temperatures in the low teens to low twenties were observed across the region, with many mountain locations reaching near 0F. Clear skies with breezy winds will continue today, as a weak cold front moves through the eastern portion of our region.
The lower conditions will persist into the early afternoon hours (20-22z) with improvement to VFR thereafter. Satellite image shows low clouds and fog and freezing fog in the same areas as in previous mornings. A freezing fog advisory remains in effect until 10 am pst, therefore allow extra time to your destination as some of the roads will be slick, especially on overpasses and bridges.
Some of our northern areas may not get above freezing at all.
- Cold Weather Advisory issued for Monday morning, mainly tied to the next arctic cold frontal passage for -10 to -17F wind chills.
A chilly morning lays ahead with supporting sub-freezing wind chills and freezing temperatures in portions of our CWA through Monday morning.
On Monday, the upper level disturbance moves northeast as high pressure builds pushing the front south of the state.
354 PM CST Sun Jan 19 2025 - Cold Weather Advisory issued for Monday morning, mainly tied to the next arctic cold frontal passage for -10 to -17F wind chills.
227 AM CST Mon Jan 20 2025 - Light snow today with the highest probabilities across south central Kansas. A longwave trough continues to impact the CONUS with very cold air lingering across the Central Plains. Arctic high pressure will build southward tonight in the wake of the light snow event. A clipper system is progged to dig across the Northern Plains on Wed driving a cold front south over the area late in the period. This front will keep some cooler air in place across the area on Thu with highs mostly in the 30s.
A strong longwave trough continues to envelop much of the CONUS early this afternoon. Another cold front is expected to plunge southward behind snow, and bitter arctic air will overspread much of the region.
The one exception will be far southwest Nebraska, so although we will see cold air in place, there will be decent cloud coverage, which should help keep temperatures a little warmer than surrounding locations, the only caveat is that if clouds were to clear out further south than expected, could see temperatures colder than forecasted for the far southern portion of the forecast area.
(This evening through Monday) Following yesterday's cold frontal passage, much colder conditions have developed across the region. For tomorrow, slightly warmer temperatures in the middle 30s to lower 40s are possible, but the bitterly cold temperatures overnight will remain the main headline.
However, did delay the clearing of the low cloudiness by several hours based on satellite trends and the latest NBM forecast data.
Light snow showers developed over portions of northern and central Colorado ahead of the mid-level short wave trough approaching from the northwest.
1220 AM CST Mon Jan 20 2025 (Tonight) A cold, dry arctic air mass has filtered into the region as temperatures have plummeted into the lower 20s as of 02z, with gusty NW winds putting wind chills in the Teens. A light dusting may be observed along a few ridgetops (and motorists along the Cumberland Plateau should take it easy in case a few very localized slick spots develop). Low temperatures will drop into the single digits across southern middle Tennessee and the lower Teens across much of north Alabama (range of 7 to 12 degrees for the low temperatures).
Subjective surface analysis indicates high pressure centered between Salina and Topeka Kansas. will be dominated by broad troffing during this period.
Conditions will dramatically improve late Tuesday morning as we begin to transition to a much warmer pattern and see temperatures above zero.
- Warmer temperatures through the end of the week. Moistening of the low levels later in the morning, will foster accumulating snow across portions of western and northern Oklahoma. A cold front will begin to move in around sunset, which will bring another shot of colder air across the entire area into Tuesday.
A cold front has moved through the area with NW winds across eastern OR and far western ID and easterly winds across the Magic Valley.
Broad upper level trough will remain across the central and eastern U.
Again, dry low-level air will initially hinder significant precipitation from reaching the ground, but as the low-level air saturates through the morning, accumulating snow is expected to develop.
1120 PM CST Sun Jan 19 2025 - Cold Weather Advisory issued for Monday morning, mainly tied to the next arctic cold frontal passage for -10 to -17F wind chills. Initial mid-tropospheric frontogenesis was developing this afternoon across Wyoming into northern Colorado and regional radar mosaic was showing weak reflectivity forming along the Cheyenne Ridge tied to this frontogenetic forcing.
Our KBYX has been very busy this evening as it has continued to track the bands of showers and thunderstorms along the leading edge of our approaching cold front! Earlier this evening, while we waited for this activity to move into our waters, it was notably humid outside. Around 5 PM, temperatures along the Keys were in the upper 70s, and were coupled with dew points in the lower to mid 70s. From synopsis, a cold front will continue to push through Keys coastal waters overnight and Monday morning, resulting in freshening north to northeasterly breezes.
634 AM EST Mon Jan 20 2025 Low pressure tracks into the Canadian Maritimes today, allowing high pressure to build in from the west through the middle of the week.
Winter weather remains forecast for portions of Central Alabama Tuesday afternoon into Tuesday night as a low pressure system develops in the western Gulf and moisture overruns a front along the northern Gulf.
As large scale troughing persists across the CONUS an embedded SW to NE oriented SWT will move south across the central/southwest US later today and tonight. In the wake of the passage of the mid-level trough, sfc ridging will be enhanced across the state and very cold air will be seen again on Tuesday.