Aikyam-Lab/Synoptic-Bench huggingface dataset:
1214 AM CDT Wed Apr 2 2025 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.
While snow amounts are expected to be on the lower side, close attention will need to be paid to areas west of I-29 towards the James Valley as a quicker turn over to snow early this morning could result in a quick 2-4" of snow.
Mild and dry conditions are expected this afternoon as we remain on the southern periphery of the mid/upper trough lifting into the Upper Mississippi Valley.
951 AM EDT Wed Apr 2 2025 A rather large surface area of high pressure will continue to build into the region as today progresses. High temperatures this afternoon will rise into the mid 80s across the east coast metro areas and into the lower 90s across interior portions of Southwest Florida. 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.
Today through Thursday: The low has moved south, but we remain on the backside of the trough with additional weather disturbances moving through. With this stronger northerly push as the trough begins to exit and the ridge nudges closer to the coast, we will see an increase in winds down the Okanogan Valley.
* Today-Thursday: A very weak system enters the region, with just some light showers over the higher elevations of the northern Sierra. * Drier and warmer weather returns late week into the weekend with periods of breezy north to east winds with afternoon gusts near 15 to 25 MPH.
Clear and cold conditions in the wake of a spring cold front have pushed area temperatures well below freezing this morning. The same goes for the San Juans, where another round of measurable snow will bring accumulations to the high country. Snow showers will spread northward early Thursday as the upper trough begins to eject the wave across the Rockies. A longwave trough will be stationed over the western CONUS Thursday into the weekend.
Will need to see 700 mb frontogenesis increase northwes of this low for any sustained heavier snow band to set up. So for the time being not a lot of snow to rotate into the RRV and will not until the lows are a bit more east.
The low-hanging fruit for snowfall appears to be in the Glacier Region where 2 to 8 inches could fall. The cold front will bring a period of moderate snow in these areas in the morning, and then across Flathead Lake by early afternoon. Once the cold front moves through from the northeast, drier air will cause showers to end in the afternoon up north, but continue across west-central Montana.
Temperatures along the island chain are solidly in the lower 80s with dew points in the mid 70s. Those in the Keys can rest assured, this weather will be less active than the high risk event expected in the Lower Mississippi Valley today. From synopsis, a strong high pressure system will continue to build in the western North Atlantic this afternoon, leading to additional freshening of east to southeast breezes across the Florida Keys marine zones.
636 AM EDT Wed Apr 2 2025 Onshore flow continues today with high pressure offshore.
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 northwest as a weak Alberta type clipper.
Few isolated showers continue to diminish 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. The area of low pressure continues off to the south of Northwestern California with some straggling showers continuing to diminish into this afternoon. Confidence is higher for cooler temps and frost/freeze conditions tonight and into Thursday morning. There is more confidence for interior Mendocino and Lake counties to reach freezing/frost conditions overnight and into Thursday morning.
841 AM EDT Wed Apr 2 2025 Onshore flow continues today with high pressure offshore.
Troughing will continue over the region today, maintaining unsettled conditions across western Washington.
(Rest of Today and Tonight) Upper ridging will continue to build over the eastern CONUS today as high pressure sits over the western Atlantic. This high will compete with a trough over the north/western CONUS that will in turn lead to multiple days of severe weather and flooding to our west. Afternoon highs will reach the low to mid 80s with very breezy southerly winds. Recent high-res guidance trends remain in agreement that the worst of the storms today and tonight will remain to our west, but there is some evidence that the line of storms responsible for severe weather over the lower MS River today may clip portions of far NW AL during the early morning hours on Thursday.
As a trough digs into the southeast, another attendant cold front is forecast to move through the region. So after some very hot days this week, the change will be a nice reprieve, before the warmer and more humid weather settles in to carry us through the summer months. With high pressure off to the east of Florida, a breezy ESE flow continues across coastal waters, but will try to turn onshore and weaken some late in the day.
1135 AM MDT Wed Apr 2 2025 - Snow shower chances (40-70%) increase through the day across the northern half of Wyoming, with the highest accumulations expected across the Bighorns, northern Johnson County, and Casper Mountain.
WEATHER PATTERN OVERVIEW: A broad upper trough will linger over the western states through much of the week. The next low pressure wave is expected from the northwest early Thursday.
The trough that brought us rain yesterday as well as thunderstorms to the San Joaquin Valley has moved slowly southward.
201 PM EDT Wed Apr 2 2025 Onshore flow continues today with high pressure offshore.
- Meteorological Overview: The steadier snows from this morning continues to wind down as the responsible low pressure system moves away from the region; however, a weakly unstable boundary layer has been left in its place and is now initiating scattered rain/snow showers and even a few rumbles of thunder. Ridging aloft slowly builds over the Northern Rockies heading into the weekend for warming and drying conditions.
Shallow showers were detected on radar across the Straits and Gulf waters with a possible trace observed over the Lower Keys. What exactly is happening across the eastern CONUS, then? A broad mid altitude ridge will keep a subsident region of the subtropical jet over the southeastern states. Further, breezes will be southeasterly and keep the environment warmer and muggier than normal for this time of year. Depending on how the high develops, winds may oscillate more between fresh and strong in the nighttime. Finally, the high keeping winds southeasterly means once it shifts eastward and winds slacken, waves will subside rapidly, so timing is important.
This afternoon: Severe threat continues to wane as the better moist axis has shifted into IL to the lower MS Valley. Deep shear is still evident in our forecast area but the cold front/dry punch is quickly moving into our western counties. Tonight through Thursday: Dry and cooler with lows in the mid 30s nw to the lower 40s se.
A long wave upper trough is settling into the Great Basin and moving slowly toward the Four Corners region. The PacNW is currently on the back side of this upper trough with northerly flow aloft. High pressure offshore will build into the area on Thursday.
930 AM MDT Wed Apr 2 2025 - Snow shower chances (40-70%) increase through the day across the northern half of Wyoming, with the highest accumulations expected across the Bighorns, northern Johnson County, and Casper Mountain.
The warm front is now surging toward the US 24 corridor. The low-level surface flow is veering in response and instability is ballooning toward 1000 j/kg MUCAPE south of the front. Storms along or very near the warm front will be most at risk for producing tornadoes, along with any discrete storms in the warm sector.
625 PM CDT Wed Apr 2 2025 An upper level ridge will continue to build across the southwest Atlantic into the southeast. Highs on Thursday will climb into the low to mid 80s in many locations with some upper 80s possible in inland areas. /13 Heading into the weekend, the pattern should finally breakdown as a stronger upper trough finally moves eastward and the upper ridge breaks down.
An upper level ridge will continue to build across the southwest Atlantic into the southeast. Highs on Thursday will climb into the low to mid 80s in many locations with some upper 80s possible in inland areas. /13 Heading into the weekend, the pattern should finally breakdown as a stronger upper trough finally moves eastward and the upper ridge breaks down.
/16 An upper level ridge will continue to build across the southwest Atlantic into the southeast. Highs on Thursday will climb into the low to mid 80s in many locations with some upper 80s possible in inland areas. /13 Heading into the weekend, the pattern should finally breakdown as a stronger upper trough finally moves eastward and the upper ridge breaks down.
Tonight through Thursday: As the low continues to shift east, the back edge of the trough will allow for some showers over Eastern WA and ID Panhandle. Winds will also increase as the ridge moves in, mainly down the Okanogan Valley.
A strong surface pressure ridge that extends along the Atlantic Coast and westward across the Gulf is generating fresh east to southeasterly breezes across the forecast area this evening. Meanwhile, strengthening deep layered ridging stretches north and northeastward across our area. As a result, expect overnight lows to hold in the upper 70s, while dew points may slip a couple degrees in to the lower 70s. Forecast sounding suggest the lower level inhibition will weaken.
/Issued 209 PM MDT Wed Apr 2 2025/ - Meteorological Overview: The steadier snows from this morning continues to wind down as the responsible low pressure system moves away from the region; however, a weakly unstable boundary layer has been left in its place and is now initiating scattered rain/snow showers and even a few rumbles of thunder. Ridging aloft slowly builds over the Northern Rockies heading into the weekend for warming and drying conditions.
A cold front extends from a triple point over Michigan southward to northern Mississippi. Closer to home here in Florida, Broad upper ridging extends from the central gulf, over Florida and then further eastward to Bermuda. On the surface, a 1034 mb high pressure center off the New England coast ridges southwest through the western Atlantic, across Florida and into the eastern gulf. By Friday morning, the area of low pressure and frontal boundary moves farther eastward while the area of high pressure shifts southward near Bermuda, continuing to ridge westward over Florida and into the eastern gulf. This area of high pressure will remain quasi-stationary near Bermuda through the weekend keeping above average temperatures and rain-free conditions across Florida.
Temperatures along the Island Chain remain quite warm in the upper 70s with dew points in the lower 70s. Sprawling high pressure remains entrenched across the western North Atlantic. This high will fluctuate in strength while meandering about the western North Atlantic.
Dry and trending warmer Friday through the weekend. The trough that brought us rain yesterday as well as thunderstorms to the San Joaquin Valley has moved slowly southward. This trough will continue to slowly move south and then east through Friday as a strong ridge starts to move in. However, mountain showers in the afternoon remain a possibility at 30 to 40 percent due to the cold air still being brought in by the trough. Once the ridge slides in Friday through the weekend, we will see a major warmup in temperatures.
06Z Aviation Discussion A broad trough of low pressure over the western U. Another round of showers will be possible across the high terrain of southcentral AZ on Friday. On Friday, the upper-lvl trough over the western CONUS will continue to deepen with 500 mb hghts becoming closed off over AZ. This closed low will pass directly over the forecast area resulting in additional large scale lift. Scattered showers will again be possible Friday afternoon and evening, however this activity will be mainly confined to the higher terrain areas north and east of Phoenix. We will begin to see a warming and drying trend through this weekend as the trough of low pressure begins to weaken and a ridge builds in over the E Pacific.
442 AM EDT Thu Apr 3 2025 Waves of low pressure will result in more rounds of showers and storms, bringing the prospects for heavy rain and potential flooding into the weekend. A cold front will move southeast across the area today. Showers and embedded storms over our southeast CWFA early this morning will taper by mid morning, with not much expected with the cold front itself during this period. Believe severe chances in our far south will be low given that the boundary slips south of the Ohio River with cooler weather allowing for lower instability. Highs will range from the upper 60s to the lower 70s.
Showers were winding down this evening with just a few lingering showers, but will redevelop over the high terrain Thursday afternoon due to a large upper trough over the interior west. Temperatures may be a degree or two warmer, but still several degrees below normal. The weather will remain cool and unsettled through Thursday under an elongating trough. An upper ridge builds in from the coast on Friday bringing dry conditions to the region.
Satellite imagery shows broad upper low across Idaho/Utah today. Wrap around moisture working around the northern portions of the low in cold pool continuing to fire showers across East Idaho. Showers taper overnight, but return again on Thursday, albeit with slightly less coverage and with slightly warmer temperatures. Long wave trof pushes east of the area Friday afternoon with a cut off low over the desert southwest moving out as well. This will open the door to the west for an encroaching upper ridge of high pressure.
A low pressure system over the region will result in cool and unsettled conditions through Friday. High pressure will move in for the weekend behind the exiting low, resulting in dry conditions with a warming trend.
Little change to weather today with upper level trof still in place over Idaho and expect convective snow showers in the mountains with light accumulations mainly expected in the central mountains and eastern highlands. It will remain cold with temperatures below normal and highs in the 30s to lower 40s mountains and 40s to around 50 in the lower elevations. Expect lingering snow showers in the eastern highlands Friday but will see significantly less coverage than today as the upper trof moves east.
In the upper lvls, a digging trof with a closed low that progresses through the base of the trof will eject from Western region of the CONUS northeastward into the Central Plains region of the CONUS.
303 AM CDT Thu Apr 3 2025 An upper level ridge will continue to build across the southwest Atlantic into the southeast. Highs on Thursday will climb into the low to mid 80s in many locations with some upper 80s possible in inland areas. /13 Heading into the weekend, the pattern should finally breakdown as a stronger upper trough finally moves eastward and the upper ridge breaks down.
135 AM EDT Thu Apr 3 2025 Strong low pressure brings the chance of severe storms and heavy rain this evening into tonight.
659 AM EDT Thu Apr 3 2025 Waves of low pressure will result in more rounds of showers and storms, bringing the prospects for heavy rain and potential flooding into the weekend. A cold front will move southeast across the area today. Showers and embedded storms over our southeast CWFA early this morning will taper by mid morning, with not much expected with the cold front itself during this period. Believe severe chances in our far south will be low given that the boundary slips south of the Ohio River with cooler weather allowing for lower instability. Highs will range from the upper 60s to the lower 70s.
The final weather disturbances will move through on the backside of a very elongated trough stretching from Manitoba Canada to the desert southwest. With the ridge building just off the west coast, we will see an increase in northerly winds across central WA through the day. Skies will clear and Friday morning will be chilly, with low temps in the mid 20s to around freezing. We will begin to feel the influence of the ridge and temperatures will warm several degrees over Thursday.
However some of the high res models and CAMS Convective allowing models) that shows radar reflectivity shows isolated showers popping up in portions of Lake and Modoc County during the day.
951 AM EDT Thu Apr 3 2025 Waves of low pressure will result in more rounds of showers and storms, bringing the prospects for heavy rain and potential flooding into the weekend. Otherwise, maintained the highest PoPs in the far south and southeast with continued light to moderate rain. A cold front will move southeast across the area today. Showers and embedded storms over our southeast CWFA early this morning will taper by mid morning, with not much expected with the cold front itself during this period. Believe severe chances in our far south will be low given that the boundary slips south of the Ohio River with cooler weather allowing for lower instability. Highs will range from the upper 60s to the lower 70s.
Current satellite shows a low level clouds within the Devils Lake Basin and the higher level clouds breaking apart.
344 AM PDT Thu Apr 3 2025 A low pressure system over the western states will maintain cooler than average temperatures through Friday though with warming for today and Friday. Then dry and warmer for the weekend with high temperatures warming to around average.
High pressure will build into the region through the remainder of the week, allowing conditions to dry out and warm up. Wet and cooler conditions are on track to return by the end of the weekend as troughing settles into the Pacific Northwest.
From synopsis, sprawling high pressure remains entrenched across the North Atlantic for the next several days with some minor fluctuations in strength.
Cooler temperatures with afternoon rain and snow showers will continue thanks to the upper level low hanging out over the region.
Temperatures are safely in the mid 80s with dew points in the mid 70s, still warmer than normal for early April.
Showers have tapered off this morning as ridging builds offshore for drier weather. High pressure will build into the region through the remainder of the week, allowing conditions to dry out and warm up. Wet and cooler conditions are on track to return by the end of the weekend as troughing settles into the Pacific Northwest.
924 AM PDT Thu Apr 3 2025 Some low to mid clouds are lingering in the valleys today, although they should diminish quickly into the day as high pressure begins to build. Some of the high resolution guidance is picking up on rain and snow showers east of the Cascades with some potential instability developing late in the afternoon.
Lows Monday morning, in turn, will be a few degrees warmer than this morning for most, with widespread 30s forecast.
957 AM MST Sun Nov 2 2025 -Cool front will bring breezy weather to most of the region today, especially far NW SD -Mild and dry weather can be expected through most of the week with the next chance for precip toward the end of the work week Progressive westerly Pac flow will support mild conditions through most of the period as a series of weak low pressure systems traverse the Northern Plains.
Otherwise, temperatures will continue to moderate relative to the last few days in part due to the influence of an approaching ridge.
-Next cold front sweeps through on Monday with another round of breezy conditions. Even though there seems to be a lot of dry air on the sounding, our KBYX radar is still showing a line of disorganized showers stretched across the waters to the south of the island chain as well as the Lower and Middle Keys.
Mid level ridging builds overhead Monday helping boost temperatures back into the 80s.
- Windy Today The cold front as it is now beginning to cross the red river Valley has already produced numerous gusts over 40 mph in parts of northeast NoDak with some as high as 55mph. CAA continues to surge behind the cold front with gusts not yet markedly dropping in the western part of the state indicating the PGF is not weakening as much as was shown in guidance yesterday behind the front. Fuel status remains a question, with recent rains likely keeping concerns on the lower end of the spectrum.
The highest winds so far behind the cold front have gusted to about 50 mph. Water vapor shows ridging maintaining control over the region early this morning, but this will be short lived. As the low passes just to the north of the Canadian Border, its attendant cold front will push through this forecast area, bringing windy conditions, especially for the northern half of the forecast area, during the day on Sunday. Late in the forecast period, as troughing develops over the eastern US, upper level flow will become more northwesterly. These gusty winds will continue until the aforementioned cold front passes through later this morning. The highest pressure rises and strongest CAA also reside in this area.
The dry reinforcing cold front has pushed southeast of our CWA. Despite decent insolation today, temperatures will top out cooler than normal. /22/ Through Today: A closed low will support a cold front dropping through our CWA this morning as it tracks southeast and becomes centered over northwest Alabama. Compared to last night, morning lows Sunday will be cooler across the northwest half of the CWA and slightly warmer across the southeast half. This will help hold afternoon highs in the 50s across our Highway 82 corridor and in the low to mid 60s across our south.
Updated at 1153 AM CST Sun Nov 2 2025 - A medium risk for rip currents continues through the day Sunday and is likely to continue into Monday due to increased winds, wave heights and wave periods behind the cold front as well as increasing effects from astronomical tides. - Ridging aloft and dry conditions (less than 10% chance of rain) return Sunday and for the remainder of the forecast period along with a warming trend in temperatures, becoming above average by midweek. With a mid-level ridge building over the region, more dry air will filter in due to the subsidence aloft.
(This afternoon through Monday) An upper low currently situated over central Tennessee will continue to progress quickly southeastward through tonight, bringing increasing shower coverage as it does so. Skies will clear fairly quickly Monday morning as high pressure builds eastward into the area with mostly sunny skies through the day.
The rest of today will be briefly dry as the weak ridging continues through the PacNW with light winds and occasional breezes from the westerly flow aloft. Otherwise, the lower elevations will have lighter rain amounts.
Updated at 1153 AM CST Sun Nov 2 2025 - A High Risk of Rip Currents is in effect for today, with a moderate risk of rip currents expected for tomorrow due to increased winds, wave heights and wave periods behind the cold front as well as increasing effects from astronomical tides. - Ridging aloft and dry conditions (less than 10% chance of rain) return today and for the remainder of the forecast period along with a warming trend in temperatures, becoming above average by midweek. With a mid-level ridge building over the region, more dry air will filter in due to the subsidence aloft.