Aikyam-Lab/Synoptic-Bench huggingface dataset:
855 PM PDT Mon May 5 2025 High pressure will lead to dry and warming conditions through Tuesday. A weak system will arrive by Wednesday bringing cooler temperatures and chances for showers. Somewhat warmer and generally dry conditions return late week before another front approaches the region over the weekend. High pressure will remain in place into Tuesday, maintaining a warming trend for t with highs peaking into the mid 70s to around 80 across much of the region. By Tuesday night into Wednesday, the next trough will move into the region, ushering in cooler onshore flow and widespread but brief chances for showers.
Temperatures across land are in the lower to mid 80s currently. As a trough in the Ohio Valley slides eastward, winds will freshen tonight with a possibility of needing Small Craft Exercise Caution headlines in the Straits of Florida. From synopsis, an Atlantic ridge will continue to nudge further west as it lifts north into the Florida Peninsula over the next couple of days. After mid week, the pressure pattern will be sloppy with ridging being the main driver for seasonable east to southeasterly breezes.
621 AM CDT Tue May 6 2025 (Today through Wednesday) Water vapor imagery this morning reveals a stout upper trough churning across the Desert Southwest.
An upper level low near the Four Corners region will eject northeastward into the central CONUS. This is due in part to drier conditions across the lowest levels. Expect moisture to increase in the lowest levels in the afternoon as winds turn eastward and advect moisture to the area, thus have increased PoPs after 18z.
A slow-moving weather system will bring cooler temperatures with periodic chances for scattered showers today and Wednesday. The upper pattern this morning is defined by a mean trough across the Intermountain West, with a strong upper-low within the trough along the Arizona and New Mexico border and another strong vort-lobe rotating south along the backside of the trough in northeast Nevada. As we move through the day today, we will see this feature move east and begin to elongate the upper-low into an E-W orientation across NRN NM while the other vort-lobe in the mean trough in NE NV moves south into SRN NV. As we move into the second half of the week, we will see a ridge of high pressure build into the Desert Southwest.
621 AM CDT Tue May 6 2025 - Warm dry conditions once again today before a cold front moves through.
524 AM MDT Tue May 6 2025 - Rain and Snow Showers Winding Down Today - Warmer Temperatures Quickly Return - A Few Showers and Storms Possible Later in the Week Rain and snow continues to shift south and west this morning. Otherwise, dry conditions quickly return along with warmer conditions.
Over the next 12-18 hours the atmosphere will continue to modify with the approach of a warm frontal boundary. /16/ (Wednesday Night through Tuesday) Wrap-around troughing, in combination with the attendant frontal boundary over parts of the Gulf Coast, will keep active weather in place through most of the rest of the week. /16/ (Wednesday Night through Tuesday) Wrap-around troughing, in combination with the attendant frontal boundary over parts of the Gulf Coast, will keep active weather in place through most of the rest of the week.
Noticeably cooler and drier air has arrived in clear slot behind the front with areas of locally dense fog across the Laurel Highlands and south central ridges. The closed upper low responsible for the recent multi-day stretch of wet weather throughout most of CPA will begin to unravel and lift to the northeast into New England by 12Z Wed. Highs will be +/- 5 degrees either side of early May climo with cooler conditions (60-65F maxT) in the western Alleghenies and milder temps (65-75F) throughout the Susquehanna Valley or ahead of the occluded front. A brief respite or lull in the frequent rain showers is expected into midweek as the upper low continues to pull away from the region. Highs trend a bit warmer on balance with daytime maxes in the 65-75F range.
941 AM EDT Tue May 6 2025 High pressure will rebuild into the area Tuesday and Wednesday, while another low pressure and/or cold front moves into the region by late week. 10-20% chance of isolated tstorms along sea breeze this afternoon Cold front that has been stalled over the region the past couple days finally pushes offshore later morning with drier air moving in behind it. Today, we warm up as high pressure starts building in. Sea breeze advances inland, and models have been on a drier trend along the sea breeze as cold front will have pushed offshore and drier air will have moved in by the time the sea breeze starts up. Highs today in the low to mid 80s inland, near 80 along the coast.
634 AM CDT Tue May 6 2025 Taking a look at the synoptics over the Conus and nearby, a pair of closed upper lows were present at this time, one heading over the Mid Atlantic region and a second over the Desert Southwest.
Winds will continue to be breezy from the north with cooler temps behind the front. 500 mb upper ridge holding over northern MN into eastern SD early this morning. The actual cold front/wind shift at 08z is near Bemidji to Detroit Lakes to Forman ND. So look for a cooler day today and a breezy/windy day with north winds 15-30 mph especially over E ND and northwest MN. High pressure moves east from Manitoba into NW Ontario Wednesday with winds turning more easterly but should be a good deal of sunshine for most, though some mid clouds may hold up in far southern fcst area and then back up into western ND.
223 AM PDT Tue May 6 2025 *Low impact weather expected through the week, with temperatures trending warmer again today.
756 AM EDT Tue May 6 2025 Additional showers and isolated thunderstorms are expected today under a slow moving area of low pressure.
536 AM EDT Tue May 6 2025 Additional showers and isolated thunderstorms are expected today under a slow moving area of low pressure.
532 AM EDT Tue May 6 2025 High pressure will rebuild into the area Tuesday and Wednesday, while another low pressure and/or cold front moves into the region by late week. 10-20% chance of isolated tstorms along sea breeze this afternoon Cold front that has been stalled over the region the past couple days finally pushes offshore this morning with drier air moving in behind it. Today, we warm up as high pressure starts building in. Sea breeze advances inland, and models have been on a drier trend along the sea breeze as cold front will have pushed offshore and drier air will have moved in by the time the sea breeze starts up. Highs today in the low to mid 80s inland, near 80 along the coast.
Over the next 12-18 hours the atmosphere will continue to modify with the approach of a warm frontal boundary. /16/ (Wednesday Night through Tuesday) Wrap-around troughing, in combination with the attendant frontal boundary over parts of the Gulf Coast, will keep active weather in place through most of the rest of the week.
(Today through Wednesday) At a glance: - Cooler temperatures will continue through the short term.
441 AM CDT Tue May 6 2025 - Warm dry conditions once again today before a cold front moves through.
Warm and mostly sunny conditions today with temperatures peaking in the low to mid 80s across interior valleys. On Wednesday, a weak system will return cooler and cloudier weather, with chances for light rain by Wednesday evening.
651 AM EDT Tue May 6 2025 High pressure will rebuild into the area Tuesday and Wednesday, while another low pressure and/or cold front moves into the region by late week. 10-20% chance of isolated tstorms along sea breeze this afternoon Cold front that has been stalled over the region the past couple days finally pushes offshore this morning with drier air moving in behind it. Today, we warm up as high pressure starts building in. Sea breeze advances inland, and models have been on a drier trend along the sea breeze as cold front will have pushed offshore and drier air will have moved in by the time the sea breeze starts up. Highs today in the low to mid 80s inland, near 80 along the coast.
Gusty winds across the higher terrain will gradually ease through the morning and into the afternoon, with generally light winds expected for inland areas. /Issued 223 AM PDT Tue May 6 2025/ *Low impact weather expected through the week, with temperatures trending warmer again today.
Tonight and Wednesday Coastal and valley clouds are expected to increase along with cooler temperatures near the coast.
300 PM CDT Tue May 6 2025 - Slightly cooler Wednesday with a 20 percent chance for afternoon showers mainly along the Highway 20 corridor.
403 PM EDT Tue May 6 2025 Low pressure approaches from the southwest overnight and will cross the region late Wednesday into Wednesday night.
Low pressure system is currently located over eastern New Mexico and clockwise flow is giving us winds generally out of the east to northeast aloft. Continues dry out tonight as the low lifts out over the Southern Plains.
Gusty winds across the higher terrain will gradually ease through the morning and into the afternoon, with generally light winds expected for inland areas.
The front should dip to the south this weekend with chances of showers remaining in the forecast as low pressure system develops over the Southeast. Latest surface analysis shows the old frontal boundary just offshore, while high pressure lingers far back into the Deep South. May have some very patchy fog before sunrise Wednesday morning, but the high clouds should ultimately tamper the chances. Wednesday, a frontal system tracking along the Gulf coast brings several waves of low pressure with it. Highs in the lower 80s. Front remains stalled offshore through the short term period as a positively tilted upper trough develops over the Midwest.
Current satellite shows a low pressure system in northeast Nevada moving south. Showers associated with the deformation zone of this low have been observed in western Magic Valley, although accumulations have been light. Showers will taper off this morning and skies will begin to clear as this low continues to move south. Ridging aloft and high pressure will begin to build over the area through the day allowing temperatures to warm to around 80 degrees.
Showers and thunderstorms will continue through Wednesday, before high pressure moves in and brings mostly warm/dry conditions. Showers continue to wrap around the backside of the low pressure that has now moved off to our east. The first closed low is centered across the AZ/NM border currently, keeping a light line of showers across the backside of the low extending from Ash Fork to Punkin Center. Another closed low is forecast to push southward from the Great Basin region.
103 PM EDT Tue May 6 2025 The cutoff low that has been driving the cloudy, cool, and showery conditions finally moves east for Wednesday giving way to warmer, drier conditions.
with Iowa underneath the ridging in between. This is especially true in the lower levels where soundings indicate inverted-V type profiles through the bulk of the day Wednesday. Should enough saturation occur to overcome the dry air in place, with easterly low level flow and an approaching high pressure from the north, any showers that do develop may actually end up resulting in gusty winds more so than much in the way of accumulating precipitation, as noted in the previous forecast update. Precipitation amounts of a trace to a tenth would be most likely, a more robust storm, should one occur, may be able to achieve higher values up to a quarter inch or more, as seen in the HREF Probability Matched Mean QPF data, though the highest amounts noted in that product are likely overdone.
Showers and weak storms will also be possible across northwest Oklahoma this evening and overnight with lift from the approaching upper low.
159 PM PDT Tue May 6 2025 Slight chance of showers for the High Desert and San Bernardino mountains this afternoon and evening, with any precipitation expected to move out of the region by midnight.
216 PM CDT Tue May 6 2025 To begin the period, a low pressure system continues to move into the area bringing with it the chance for showers and thunderstorms.
Water Vapor and upper air models show upper trough and low over the four corners region. Over the next 24 hours the upper trough slides east towards the central and southern plains.
For the remainder of today, looking at one last day with the dry air flowing from the northwest around the low pressure system to our north. Overall a nice day! Early Wednesday morning, we will begin to see the effects of the low pressure system to our west (part of the original Omega block) push eastward as the block breaks down. Should the low clouds dissipate earlier than expected though, chances will increase to see showers.
These high clouds will eventually overspread central Illinois by tonight as the upper low lifts into the Southern Plains. Mostly cloudy skies will then continue into Wednesday as the low stalls over SW Missouri. Temperatures today will surge into the lowers 70s beneath mostly sunny skies, then into the mid-to-upper 70s by Wednesday (despite the filtered sunshine) as a ribbon of warmer 850-mb temps sags into central IL ahead of a backdoor front.
Lows tonight will be in the upper 50s and lower 60s, with highs on Wednesday in the low 70s to upper 70s.
High pressure will remain in control through late this week. A weak front enters the area on Wednesday weakening the high pressure but this is brief and high pressure strengthens again late in the week.
1007 AM CDT Tue May 6 2025 Within the last half hour, a Severe Thunderstorm Watch has been issued across the majority of the SHV responsible ETX counties as elevated thunderstorms north of an advancing warm front have initiated. Question for later this afternoon comes in the form of how far north the warm front stretched across the Gulf Coast advances north into Deep East Texas and West- Central Louisiana. Over the next 12-18 hours the atmosphere will continue to modify with the approach of a warm frontal boundary. /16/ (Wednesday Night through Tuesday) Wrap-around troughing, in combination with the attendant frontal boundary over parts of the Gulf Coast, will keep active weather in place through most of the rest of the week.
A mid-level ridge builds over Middle TN, hence the clear and dry weather today. As it does so, the ridge will flatten, but hold it's ground. (Wednesday Night through next Tuesday) Our ridging aloft will weaken and slide east as a mid-level trough, extending from the northeast down to the lower mississippi valley, deepens and stalls over the region.
Through the majority of the work week the Keys will experience warm, mostly stable, and dry conditions resulting in mostly sunny skies and limited shower activity as a subtropical ridge extends over the southeastern U. Approaching the weekend, the ridge is expected to weaken and an upper level trough will dig into the Gulf allowing for a surge of deep tropical moisture, and increase of instability.
Warmer and drier conditions return once the system exits Wednesday night. The main trigger will be a closed low dropping southward from northern Nevada, which should move into Clark County by late afternoon. Many of the hi-res models indicate a vort lobe rotating around the main upper low and moving eastward across San Bernardino County will initiate some more organized convective activity by late afternoon. These showers and thunderstorms should push to the east and reach the lower CRV by the evening hours. The main upper low will move into Arizona on Wednesday and slowly move to the east.
240 PM EDT Tue May 6 2025 High pressure will build into the area through Wednesday, while another low pressure and/or cold front impacts the region by late week. This should allow temps to fall into the low/mid 50s inland and low/mid 60s for the beaches.
140 PM EDT Tue May 6 2025 Additional showers and isolated thunderstorms are expected today under a slow moving area of low pressure.
Thus, despite the fact the mid level dry intrusion appeared to be poking into southwest KS on water vapor imagery, we (southwest Kansas) was still well within the lower tropospheric cool/moist conveyor belt with impressive warm air advection around 700mb on saturated, or near-saturated east- southeast winds. As the upper level low gets closer tonight, the rainfall rates will increase in vicinity of strongest 850-700mb frontogenesis. POPs will remain high (high Likely to Categorical) through the day Wednesday, but after 18Z, the upper low will finally move far enough east and fill out (weaken) such that showers will become more and more scattered in nature.
323 PM EDT Tue May 6 2025 - Rain Ends Tonight then Fair and Cool Upper low continues to spin across the Ohio Valley with a deformation axis bringing mesoscale bands of rain across Lower Michigan into the evening, before moving east and ending.
1150 AM MDT Tue May 6 2025 - Rain and Snow Showers Winding Down Today - Warmer Temperatures Quickly Return - A Few Showers and Storms Possible Later in the Week Rain and snow continues to shift south and west this morning. Otherwise, dry conditions quickly return along with warmer conditions.
1252 PM CDT Tue May 6 2025 Taking a look at the synoptics over the Conus and nearby, a pair of closed upper lows were present at this time, one heading over the Mid Atlantic region and a second over the Desert Southwest.
1233 PM CDT Tue May 6 2025 - Warm dry conditions once again today before a cold front moves through.
742 PM EDT Tue May 6 2025 - Rain Ends Tonight then Fair and Cool Upper low continues to spin across the Ohio Valley with a deformation axis bringing mesoscale bands of rain across Lower Michigan into the evening, before moving east and ending.
946 PM EDT Tue May 6 2025 Low pressure approaches from the southwest overnight and will cross the region late Wednesday into Wednesday night.
A cool and unsettled pattern will persist into the middle of the week as a low pressure system slowly moves through the region. High pressure will bring a warming and drying trend for the latter portion of the week through the upcoming weekend.
749 PM EDT Tue May 6 2025 The cutoff low that has been driving the cloudy, cool, and showery conditions finally moves east for Wednesday giving way to warmer, drier conditions.
823 PM EDT Tue May 6 2025 High pressure over the Tennessee Valley will build into central NC tonight and be in place through Wednesday.
624 PM CDT Tue May 6 2025 To begin the period, a low pressure system continues to move into the area bringing with it the chance for showers and thunderstorms.
1006 PM EDT Tue May 6 2025 The cutoff low that has been driving the cloudy, cool, and showery conditions finally moves east for Wednesday giving way to warmer, drier conditions.
An upper ridge will strengthen through Wednesday for mostly clear skies, generally light winds, and warmer temperatures.
The current severe storm and developing areal showers are feeding off moisture rich warm sector air south of a lifting warm front. The eastern side of an upper low pushes east into Missouri and Arkansas.
1033 PM EDT Tue May 6 2025 The upper level low responsible for unsettled weather over the past few days will move across PA tonight with light to moderate rain over north-central and south-central PA.
The upper closed low pressure area responsible for the numerous showers and scattered thunderstorms tonight is currently centered over New Mexico, and will move east- northeastward to over Missouri by late Wednesday night.
An Atlantic ridge remains in place across the western North Atlantic though it is beginning to nudge its way back to the west influencing Florida more than in previous days. From synopsis, an Atlantic ridge will continue to nudge further west as it lifts north into the Florida Peninsula over the next couple of days. After mid week, the pressure pattern will be sloppy with ridging being the main driver for seasonable east to southeasterly breezes.
642 PM CDT Tue May 6 2025 - Slightly cooler Wednesday with a 20 percent chance for afternoon showers mainly along the Highway 20 corridor.
To begin the period, a low pressure system continues to move into the area bringing with it the chance for showers and thunderstorms.
High pressure will remain in place today, allowing for another dry and warm day across western Washington. A weak system will cross the region on Wednesday, bringing in light shower activity and cooler temperatures.
703 PM EDT Tue May 6 2025 High pressure will build into the area through Wednesday, while another low pressure and/or cold front impacts the region by late week. This should allow temps to fall into the low/mid 50s inland and low/mid 60s for the beaches.
Warm and sunny this afternoon as high pressure remains overhead. A weak system will bring cooler and cloudier weather for Wednesday, possibly accompanied by very light rain Wednesday afternoon and evening.
605 PM EDT Tue May 6 2025 Low pressure approaches from the southwest overnight and will cross the region late Wednesday into Wednesday night.
(Tonight through Wednesday night) Key messages: - Storms to decrease in coverage this evening before another conditional risk of severe storms and heavy rainfall tomorrow An upper level low currently centered over New Mexico this afternoon tries to move eastward over the central plains tonight and Wednesday.
- Cooler but still seasonable for Wednesday and Thursday.
An upper low over the central Plains (left over from a defunct omega block) advances slowly eastward and is absorbed into an evolving upper trof over the eastern states on Thursday.
We continue our wet period on Thursday as the upper low swings additional bouts of energy through the region.
258 AM EDT Wed May 7 2025 Weak high pressure will build over our region today and linger through tonight.
(Tonight through Wednesday Night) After a fantastically sunny day across Middle TN with highs in the low to mid 70s, today will be looked at as but a blip in the matrix -- one lone day without any PoPs, amongst many with rain chances. As part of some mid- level energy sandwiched between a ridge to our southeast and a trough over the center of the country, this will be our weather maker for later tonight and tomorrow. (Thursday through next Wednesday) As we get into Thursday and the upper low currently over the center of the country slips closer to the TN and OH valleys, we'll have a medium chance for thunderstorms to develop Thursday afternoon. Medium and long range guidance is suggesting that Thursday's upper low could be the culprit in keeping rain chances in the forecast for several days.
1136 PM EDT Tue May 6 2025 The upper level low responsible for unsettled weather over the past few days will move across PA tonight with light to moderate rain over north-central and south-central PA.
456 AM EDT Wed May 7 2025 High pressure will build into the area through today, while another low pressure and/or cold front impacts the region by late week. This should allow temps to fall into the low/mid 50s inland and low/mid 60s for the beaches. Cold front that has been near us the past couple days finally shifts offshore through the morning as high pressure continues building in. Highs in the low to mid 80s inland, upper 70s to near 80 for beaches. Lows tonight in the low 60s inland, mid 60s along the coast.
831 PM PDT Tue May 6 2025 High pressure will remain in place today, allowing for another dry and warm day across western Washington. A weak system will cross the region on Wednesday, bringing in light shower activity and cooler temperatures. An upper level ridge axis will continue to slide eastward today, bringing in increasing high clouds as the next trough approaches. High pressure will build into western Washington from the south on Thursday, allowing conditions to dry out under cloudy skies.