Aikyam-Lab/Synoptic-Bench huggingface dataset:
Closer to home, the dominant surface synoptic feature is an area of high pressure now centered east of Bermuda, with light to gentle southeasterly return low-level flow for the Florida Keys and the adjacent nearshore and offshore coastal waters. Dew points in the lower to mid 70s at most land-based surface observation locations has limited radiational cooling impacts, with most communities hovering in the lower to mid 70s at this early Tuesday morning hour. The exception to this is across the offshore Gulf waters, where patchy fog is currently being detected across the cooler, deeper waters to the northwest of the Dry Tortugas. The aforementioned frontal feature will slowly progress into the western North Atlantic over the next 24-48 hours, with a strong, 1035 mb high pressure building in its wake off the Mid-Atlantic.
(This evening through Tuesday) An upper level low off the Pacific Northwest coast will continue to gradually move inland tonight into tomorrow through southwest Oregon into NoCal. Out ahead of the main portion of the system today, a relatively weak cold front is just now moving into the North Bay early this afternoon and will continue south and east through the remainder of today and this evening. However, the trough will broaden over our area as the primary system shifts east keeping cooler air aloft in place over the west through the middle of the week. Farther south, the highest spots in the Big Sur and Santa Lucias may see an inch or two of snow.
1045 PM CDT Mon Mar 31 2025 (Rest of tonight and Tuesday) In wake of the cold front, a drier air mass will continue to filter into the Tennessee Valley tonight as evidenced by clouds dissipating on satellite data across the region. Gusty NW winds will gradually weaken under 5 MPH with a clear sky developing after Midnight -- allowing lows to fall back into the lower 40s in most locations (with a few upper 30s readings possible in far northeast Alabama and southern middle Tennessee). High pressure over FL/GA will continue to build into the region on Tuesday, promoting mostly sunny and dry conditions as temperatures return to the low to mid 70s in most locations by the afternoon.
Upper ridging is currently situated over the Central Plains in advance of a large trough over much of the Intermountain West. Lee troughing over the High Plains and a strengthening pressure gradient today will result in southerly winds and rapid moisture transport to occur. Attention will then turn west and southwestward along an approaching cold front and a southward trailing dryline as the surface focus for convective initation. Storms that develop along the cold front may be briefly semi-discrete before their orientation favors a quick transition to a linear storm mode. Persistent troughing over the Four Corners Wed into the weekend looks progressively cooler each day, with below normal temperatures expected for much of the period.
High pressure provides dry weather today and tonight. Low level cold air advection along with an upslope wind flow will continue to squeeze the moisture in the lower atmosphere, allowing for chances of some light rain or drizzle early this morning in and near the mountains. A high pressure system will then build in today causing clouds to lift and dissipate. First part of Wednesday should remain generally dry, however, a warm frontal boundary will be lifting north through the area, as low pressure moves northeast into the Upper Midwest/Great Lakes region.
(Today through Wednesday) Mid-level ridging will begin to build over the Florida peninsula today as a weakening trough finally exits the Eastern Seaboard out into the Atlantic Ocean. Much of this moisture will remain trapped in the lower levels as dry air begins to overspread the region aloft. Chances for showers decrease substantially as we head into Wednesday and ridging (and dry air aloft) fully settle in across the area. Highs today and tomorrow will peak in the mid to upper 80s, with portions of southwest Florida hitting the lower 90s each day.
The boundary quickly returns north as a warm front late Tuesday into Wednesday as an upper level system ejects northeast across the northern plains. The frontal boundary associated with this feature will only slowly move east and stall west of the Mississippi river as an upper level ridge builds over the western Atlantic into the northern Gulf.
High temperatures are expected to generally range from the upper 70s to mid 80s across the forecast area, depending on how fast the low clouds break this morning. Light southerly flow is expected this afternoon and overnight as an upper level trough digs well west of the area with ridging centered east of the area. Lows tonight will generally range from the low to mid 60s with another chance of fog.
214 AM CDT Tue Apr 1 2025 Weak sfc ridging across the Southern Plains/Lower Miss Valley attm is resulting in light winds with just a little bit of remaining low level moisture in the form of cloud cover across our far eastern zones. Overnight lows in the low to mid 50s tonight will climb to near 70 on Tuesday night as an enhanced low-level jet drives moisture from the Gulf of America northward across the region.
1206 AM CDT Tue Apr 1 2025 - A few elevated thunderstorms will develop Tuesday night as a warm front lifts through the region, where a low probability (15% chance) for damaging wind gusts and large hail exists after midnight.
However with temperatures reaching the lower 90s by early afternoon over the interior, there will no doubt be enough instability for isolated to scattered showers and thunderstorms mainly after 3 PM. (Today through Wednesday) Mid-level ridging will begin to build over the Florida peninsula today as a weakening trough finally exits the Eastern Seaboard out into the Atlantic Ocean. Much of this moisture will remain trapped in the lower levels as dry air begins to overspread the region aloft. Chances for showers decrease substantially as we head into Wednesday and ridging (and dry air aloft) fully settle in across the area. Highs today and tomorrow will peak in the mid to upper 80s, with portions of southwest Florida hitting the lower 90s each day.
WEATHER PATTERN OVERVIEW: A complex upper trough will linger over the western states through much of the week.
Strong southwest to west winds will continue through today as the jet max moves overhead and a cold front drops down from the north.
A broad trough will remain over the area into midweek for a chance of showers and near seasonal temperatures. High pressure aloft will build into the region toward the end of the week for dry conditions and temperatures trending well above normal by the weekend.
Post-frontal rain showers will continue through the day as the parent low pressure system with upper-level support treks southeastward from Northwestern California. Widespread wind gusts of 20-30 mph, gusts up to 45 mph in the higher terrain and along the immediate coast are also expected.
Issued 426 AM CDT Tue Apr 1 2025 Today through Wednesday: Clouds will gradually increase today ahead of approaching low pressure. This round of precip will likely move out by mid-morning Wednesday, with attention then turning to the potential for more storms late morning into the afternoon as the warm sector of the low pokes into southern Wisconsin. The big question remains if there will be enough instability for stronger storms as the cold front approaches, with more than enough shear for organized storms.
Other than some high lvl clouds, skies were mostly clear with predawn temps ranging fm the lower 40s to the mid 50s. Meanwhile, the mid lvl flow pattern wl transition fm zonal to the southwest in response to a large scale upper trof setting up over the western U. This wl allow an assocd warm fnt to lift northward acrs the FA, allowing a warmer and more humid airmass to return to the Natural State.
521 AM CDT Tue Apr 1 2025 (Today) A cold front has pushed into central GA through the central Gulf Coast. High pressure was located over the Great Lakes with a ridge axis south into the TN Valley. As the high shifts rapidly east today, and cyclogenesis takes place in the central Plains, flow will turn around to a southeast to south direction rather quickly today. Temperatures should reach highs in the lower 70s this afternoon as a result of the sunshine and return to warm air advection.
Temperatures as of 10 AM are already in the lower 80s and dew points are in the lower to mid 70s. The western end of a broad ridge will begin to strengthen, which will allow east to southeast winds to gradually increase through the afternoon. A strong high pressure system will build in the western North Atlantic tonight and Wednesday, leading to freshening breezes across the Florida Keys marine zones.
729 AM EDT Tue Apr 1 2025 (Today through Wednesday) Mid-level ridging will begin to build over the Florida peninsula today as a weakening trough finally exits the Eastern Seaboard out into the Atlantic Ocean. Much of this moisture will remain trapped in the lower levels as dry air begins to overspread the region aloft. Chances for showers decrease substantially as we head into Wednesday and ridging (and dry air aloft) fully settle in across the area. Highs today and tomorrow will peak in the mid to upper 80s, with portions of southwest Florida hitting the lower 90s each day.
631 AM CDT Tue Apr 1 2025 (Today through Wednesday) Mostly a progressive zonal flow over the region today will eventually transition to a more southwest flow aloft as an upper ridge builds over the western Caribbean and Bahamas tonight. This will help push the cold front that moved through yesterday back northward as a warm front. Rain chances are on the lower end with some very subtle low level convergence, but these should be few and far between. That said, it looks to be a mostly cloudy type day out there with the low level convergence and WAA taking shape across the region. Wednesday is the start of a rather dramatic warming trend again as the upper level ridge builds and heights and thicknesses increase across the region.
1021 AM EDT Tue Apr 1 2025 High pressure will build to the north near New England through Wednesday as deep low pressure develops over the Plains and moves into Canada. A warm front ahead of the low will lift through the area Wednesday night.
Then the question becomes how long the storms linger into the afternoon to affect convection potential later in the day along/ahead of the dry punch/strong cold front. Temperatures will be quite tricky with such a strong warm front lifting northward across the area. Highs will push into the 70s with dewpoints in the lower 60s south of the front, with only in the 40s and 50s to the north. However, if thunderstorms linger longer than expected this could hold the warm front up for a while.
157 PM EDT Tue Apr 1 2025 High pressure provides dry weather later today/tonight. Low level cold air advection along with an upslope wind flow will continue to squeeze the moisture in the lower atmosphere, allowing for chances of some light rain or drizzle early this morning in and near the mountains. A high pressure system will then build in today causing clouds to lift and dissipate.
(Rest of Today and Tonight) High pressure will start to lift farther north today as an upper trough axis shifts off the northern Atlantic coast and weak ridging helps mid level winds back to the southwest. This will help bring the warmer airmass pushed to our south by the front yesterday back northward. For the remainder of the afternoon, though, temps will be on the cooler side compared to recent days with highs in the lower 70s. Dry conditions are expected overnight but southerly winds and cloud cover will increase as the warm front surges north. Overnight lows will be much warmer tonight, only falling to the mid to upper 50s.
As an upper/mid level trough continues to deepen across the Great Basin into the Desert Southwest, low pressure on the lee side of the Rockies into northern Mexico is leading to an increased pressure gradient with breezy to windy conditions expected into Wednesday. The warm temperatures and high humidity will lead to heat indices onto the low triple digits, mainly in the Rio Grande Plains and along I-69C today and along and east of the I-69 C (excluding the islands) for Wednesday. Overnight temperatures will run about 5 to 10 degrees above normal with lows in the low to mid 70s.
1224 PM EDT Tue Apr 1 2025 High pressure provides dry weather later today/tonight. Low level cold air advection along with an upslope wind flow will continue to squeeze the moisture in the lower atmosphere, allowing for chances of some light rain or drizzle early this morning in and near the mountains. A high pressure system will then build in today causing clouds to lift and dissipate.
With the low pressure along the west coast in northern Oregon/Washington, southwesterly flow will bring more precipitation in and a Winter Storm Warning is in effect until this afternoon for more of Siskiyou County which includes the Klamath and Trinity mountains and Etna Summit. A Winter Weather Advisory is also in effect for east side including the highway 97 corridor between Klamath Falls and Crescent for the same time frame as the warning. The upper low will start moving through the area into Wednesday and the activity will wind down. The low that will be impacting us the next few days will then dig farther south with high pressure building over the Pacific Northwest. This will be favorable for warmer temperatures and drier conditions. Low pressure will move across the area today.
Today a weak cold front to our north will help to bring some isolated showers and storms to the interior but most will stay dry. Strong high pressure in the Atlantic will keep us in a southerly flow regime.
The western flank of a broad ridge is slowly strengthening and our winds have returned from the east to southeast. Temperatures are in the lower to mid 80s with dew points uncomfortably in the mid 70s. The aforementioned ridge that is currently sitting across the Atlantic will get "help" in the next 24 hours or so. A strong low pressure system moving across the Rockies will slide east into the Central Plains tonight into Wednesday. This will force the two to merge essentially and allow for the ridge as a whole to expand and build.
Rain will continue to spread across the region today as broad lift develops in response to the progressing trough. Rain has or will change to snow in the higher elevations of the Black Hills at first, with the main change over from CAA on the Plains ensuing this evening. This puts 3-6 inches in parts of the northern Black Hills, with 1-2 inches across NW SD, with the higher amounts confined to ridges on the plains.
444 PM EDT Tue Apr 1 2025 High pressure will begin to build toward the region tonight and will remain over the area through Wednesday.
224 PM CDT Tue Apr 1 2025 High pressure and calm conditions have taken root in the wake of the strong cold front that moved through the area yesterday. An overall zonal pattern will dominate the CONUS with broad surface ridging over the region for the next day or two. Broad surface ridging sharpens into a meridional ridge with an upstream trough following suite, all in response to a strong low transiting the northern plains.
Low pressure emerges from the Colorado Rockies this evening races northeast bringing us the opportunity for severe thunderstorms later Wednesday. Due to the strong wind field associated with the low and upper-level jet, recovery from morning showers/storms appears quite likely. The cold front responsible for our severe weather hangs-up across the Ohio River Valley for the remainder of the week and is the focal point for numerous rounds of showers and thunderstorms.
Remaining measurable snow will likely be limited to any higher elevations of the Buffalo Ridge or near the Hwy 14 corridor when snow rates are highest.
Look for inland highs in the upper 80s to even low 90s! An afternoon seabreeze will keep the coastal strip several degrees cooler.
Issued by National Weather Service Binghamton NY 318 PM EDT Tue Apr 1 2025 * High pressure continuing to build into the region this afternoon will bring sunshine, low relative humidity, with current gusty winds diminishing.
346 PM EDT Tue Apr 1 2025 - Mixed Precipitation (snow, sleet and freezing rain) returns late tonight into Wednesday.
207 PM EDT Tue Apr 1 2025 High pressure will build to the north near New England through Wednesday as deep low pressure develops over the Plains and moves into Canada. A warm front ahead of the low will lift through the area Wednesday night.
WEATHER PATTERN OVERVIEW: A complex upper trough will linger over the western states through much of the week. The next main larger low pressure wave is expected from the N/NW, more or less, as a weak Alberta type clipper.
1222 PM EDT Tue Apr 1 2025 High pressure provides dry weather later today/tonight. Low level cold air advection along with an upslope wind flow will continue to squeeze the moisture in the lower atmosphere, allowing for chances of some light rain or drizzle early this morning in and near the mountains. A high pressure system will then build in today causing clouds to lift and dissipate.
1134 AM CDT Tue Apr 1 2025 (Rest of Today and Tonight) High pressure will start to lift farther north today as an upper trough axis shifts off the northern Atlantic coast and weak ridging helps mid level winds back to the southwest. This will help bring the warmer airmass pushed to our south by the front yesterday back northward. For the remainder of the afternoon, though, temps will be on the cooler side compared to recent days with highs in the lower 70s. Dry conditions are expected overnight but southerly winds and cloud cover will increase as the warm front surges north. Overnight lows will be much warmer tonight, only falling to the mid to upper 50s.
Morning satellite imagery showing main upper low pushing onto the SW Oregon coast. Then, numerous showers and isolated thunderstorms developing this afternoon, mainly over the higher terrain.
The latest forecast update calls for a 20-30% probability of thunder to continue through the late afternoon hours, associated with an upper level low across the state that will bring cold air aloft, which when combined with daytime heating, will result in some instability. High temperatures today reach the middle to upper 50s across the lower elevations, to the 40s and the lower 50s in the higher elevations. The thunderstorm chances decrease as the sun sets, cutting off the solar heating, and by Wednesday the upper level low should move off to the south, cutting off moisture transport and shifting the upper level flow to a northerly meridional pattern. This should mark the first day of a warming and drying trend, with highs warming to the lower 60s in the inland valleys.
However, some showers linger overnight as a short wave upper trough moves southward through the area, mainly in SE Oregon and far SW Idaho. Showers are expected to redevelop on Wednesday, but mainly over the higher terrain. Scattered snow/graupel showers and isolated thunderstorms redeveloping Wednesday afternoon, mainly over the higher terrain.
An upper level trough is bringing widespread showers across the region this afternoon. The backside of this trough will linger over the PacNW tonight into Wednesday as the trough digs over the Great Basin.
935 PM EDT Tue Apr 1 2025 High pressure will build to the north near New England through Wednesday as deep low pressure develops over the Plains and moves into Canada. A warm front ahead of the low will lift through the area Wednesday night.
A broad trough will remain over the area into midweek for a chance of showers. High pressure aloft will build into the region toward the end of the week for dry conditions and temperatures trending well above normal by the weekend.
937 PM EDT Tue Apr 1 2025 High pressure builds in tonight and will remain over the area through Wednesday.
The threat for showers and thunderstorms with small hail ends as a cold upper low progresses south. A sharp warmup with building high pressure can be expected for the end of the week, followed by some rain chances. Afternoon radar shows some lingering light showers moving through as a cold, upper low proceeds south. Though the usual post frontal deterrents for cold overnight lows will exist tonight, that is lingering cloud cover and moisture, and chance for developing fog, there is a potential for frost and freezing temperatures in some of our inland locations where the growing season has officially begun.
641 PM CDT Tue Apr 1 2025 (Rest of Today and Tonight) High pressure will start to lift farther north today as an upper trough axis shifts off the northern Atlantic coast and weak ridging helps mid level winds back to the southwest. This will help bring the warmer airmass pushed to our south by the front yesterday back northward. For the remainder of the afternoon, though, temps will be on the cooler side compared to recent days with highs in the lower 70s. Dry conditions are expected overnight but southerly winds and cloud cover will increase as the warm front surges north. Overnight lows will be much warmer tonight, only falling to the mid to upper 50s.
Tonight through Wednesday: A low pressure system continues to move out the region this afternoon, with some lingering showers over Eastern WA and ID Panhandle. A slight chance of thunder has been added for the higher terrain Wednesday as there will be some CAPE available.
The Keys are within the western flank of a surface through lower level ridging. This will be due to the Atlantic ridge being reinforced by a strong high spilling down the Atlantic Coast and a sprawling mid latitude low swinging through the Plains. Guidance suggests rain chances will remain quite slim due to surface through lower level ridging remaining in control and lower levels remaining unidirectional. The combination of a strengthening mid latitude low swinging through the Plains and the reinforcement of the Atlantic ridge will produce strengthening east to southeasterly breezes overnight into tomorrow.
Looking at a fairly dry week as a rather large ridge setup over the western Atlantic and gradually noses into the southeastern US. Deep southwesterly flow between the western periphery of the ridge and a rather deep upper trough over the western US will persist over the area allowing for deep gulf moisture to surge northward.
For the remainder of the overnight hours, most hi-res guidance remains rather aggressive with the coverage of this stratus/fog with guidance generally showing nearly all offshore areas eventually impacted but thinking coverage should be more patchy for locations south of the Nature Coast given the warmer SSTs further south. Today a weak cold front to our north will help to bring some isolated showers and storms to the interior but most will stay dry. Strong high pressure in the Atlantic will keep us in a southerly flow regime.
This high will fluctuate in strength while meandering about the western North Atlantic.
202 AM EDT Wed Apr 2 2025 - Mixed Precipitation (snow, sleet and freezing rain) returns late tonight into Wednesday.
Afternoon heating driven by high pressure to our southeast will push MLCAPE values into the 2500-3500 J/kg range through the Delta.
Today will be noticably cooler thanks to a Pacific front that is currently draped across our northwestern zones and pushing steadily southeastward. Despite the cooler temperatures, afternoon humidity will still drop into the single digits across most of the FA. Lift will be marginal, especially compared to lift associated with the forthcoming upper low, with accumulations likely being light.
340 AM EDT Wed Apr 2 2025 Onshore flow continues today with high pressure offshore.
Temperatures will continue to rise each day, with highs along the East Coast metro in the mid 80s, and in the low 90s across southwest FL. Temperatures overnight will also remain a few degrees above average, with lows tonight in the low 70s across the East Coast, and upper 60s inland.