Aikyam-Lab/Synoptic-Bench huggingface dataset:
1225 PM EDT Sun Aug 17 2025 A cold front will bring a round of scattered showers and a few thunderstorms through this afternoon, followed by cooler weather for the start of the work week. An area of low pressure will approach the Great Lakes region through mid-week bringing a period of unsettled weather. A cold front currently drop south into the region. An area of Canadian high pressure building into the region will bring a fair and cooler day Monday, with high temperatures in the 70s, with some upper 60s for the higher terrain.
119 PM EDT Sun Aug 17 2025 - Breezy NW to NE wind brings cooler and less humid air into SE Michigan that is more noticeable by tonight.
Another interesting detail is a cloud line forming just west of the Upper Keys with less cloud cover observed over the Lower and Middle Keys than yesterday around this time. From synopsis, a broad ridge stretching from the North Atlantic westward across the Florida Peninsula will result in light to gentle easterly breezes across the Keys coastal waters through early this week.
1206 PM CDT Sun Aug 17 2025 (Rest of Today and Tonight) The Tennessee Valley sits underneath high pressure today. Warm and muggy conditions will continue through tonight as overnight lows only dip into the low to mid 70s.
130 PM EDT Sun Aug 17 2025 A cold front will continue moving through the region this afternoon and evening, bringing with it isolated to scattered chances for showers and thunderstorms.
150 PM EDT Sun Aug 17 2025 Weak high pressure across this morning will give way to a developing pre-frontal trough over western NC in the afternoon.
911 AM PDT Sun Aug 17 2025 Low pressure along the West Coast will bring cool weather and extensive coastal clouds early this week. High pressure will build this week, bringing a warming trend and less marine layer cloud cover.
The overall upper flow pattern has remained consistent with a sprawling upper level ridge across the central and southern Plains. Clockwise flow around this feature puts our region a modest westerly flow with embedded s/w energy rotating around the periphery of the ridge from the Rockies/High Plains into the Dakotas and Northern Plains. This is expected to persist into the early portion of the week before the ridge re-centers itself westward closer to the Four Corners region of the southwest CONUS.
High pressure continues to build over the region through the week. However, a strengthening upper level ridge towards the latter part of the week will bring about warmer temperatures as well as weak offshore flow.
123 PM EDT Sun Aug 17 2025 A cold front will finish moving through the region this afternoon with scattered showers and isolated thunder. Cooler air will move into the region behind the front, bringing very comfortable conditions through mid week. Key Messages: - A cold front finishes moving through the region this afternoon to early evening, with scattered showers and isolated thunder. - Much cooler and drier air in place through mid week with northerly flow across the region. Chances for impactful weather this afternoon were already on the low side, and continue to lower, courtesy of earlier-than- anticipated convection spreading clouds across most of the area to limit daytime heating. Much drier and cooler air will dive into the region from Canada. Cool air remains across the region through mid week as high pressure slides across Canada.
Otherwise, high pressure surface and aloft centered just to our west will continue through Monday. This will lead to warmer than normal temperatures through the period. /22/ Upper level high pressure prevails over the area and with the subsidence expect mainly just isolated thunderstorm activity. Little will change, as high pressure remains over the region.
(Rest of Today and Tonight) The Tennessee Valley sits underneath high pressure today. Warm and muggy conditions will continue through tonight as overnight lows only dip into the low to mid 70s.
Convection today has been much more sparse with initial echoes firing across the southern Sangre De Cristos, northern slopes of the Raton Ridge and Baca county as of 19z. Dew points mixing out into the lower 50s quickly diminishes CAPEs according to modified model soundings, so most likely risks would be gusty outflow winds.
(This afternoon through Monday night) The local area will remain under the influence of a gradually retreating upper high. With the eastern extent of the high still resulting in weak subsidence aloft, expect slightly below normal rain chances with a delayed onset in convection until the mid to late afternoon. The delayed convective onset and lower coverage will allow afternoon temperatures to rise into the mid to upper 90s, or roughly 3-6 degrees warmer than normal for this time of year.
Broad ridging in place across the area will gradually shift back westward into the Intermountain West by Monday, introducing light northwesterly surface flow for some drier air to filter in.
125 PM PDT Sun Aug 17 2025 Low pressure along the West Coast will bring cool weather and extensive coastal clouds early this week. High pressure will build this week, bringing a warming trend and less marine layer cloud cover.
1144 AM MDT Sun Aug 17 2025 - Upper ridge shifts slightly eastward today, bringing drier air and lower chances for thunderstorms to the region. Upper-level ridge moves east into the plains, with main plume of higher moisture shifting south and east of the region.
At the surface, dewpoints are in the lower to middle 70s. Ridging will begin moving westward on Monday, centering over the Four Corners by Monday evening.
Behind the wave, a ridging pattern will lead to a return of warm, dry conditions across the region.
145 PM EDT Sun Aug 17 2025 An upper ridge will remain centered to our west early this week.
Riding along the southern periphery of ridging in the Caribbean, Erin is expected to eventually make a northerly turn that takes the storm along the eastern seaboard, following a break in the ridge. While passing far enough to our east to negate any serious impacts across West Central and SWFL, the storm will cause large, powerful surf along the east coast of Florida, and dictate the ultimate placement and intensity of the ridge axis across the state. For the next couple days, the ridge remains pretty much directly overhead.
135 PM EDT Sun Aug 17 2025 A cold front will finish moving through the region this afternoon with scattered showers and isolated thunder. Cooler air will move into the region behind the front, bringing very comfortable conditions through mid week. Key Messages: - A cold front finishes moving through the region this afternoon to early evening, with scattered showers and isolated thunder. - Much cooler and drier air in place through mid week with northerly flow across the region. Chances for impactful weather this afternoon were already on the low side, and continue to lower, courtesy of earlier-than- anticipated convection spreading clouds across most of the area to limit daytime heating. Much drier and cooler air will dive into the region from Canada. Cool air remains across the region through mid week as high pressure slides across Canada.
High pressure surface and aloft centered just to our west will help result in a rather hot day across the CWA again today. /22/ Upper level high pressure prevails over the area and with the subsidence expect mainly just isolated thunderstorm activity this afternoon. Little will change tomorrow, as upper high pressure remains over the region.
Diurnally driven convection in the afternoon, FEW-SCT Cu-field and temperatures a few degrees warmer than today. Forecast high temperatures will climb into the low to mid 90s (92-96) and low 80s in the northeast GA mountains.
A weak warm front also looks to set up Monday warming temperatures back into the 80s for most areas with light winds also expected.
108 PM EDT Sun Aug 17 2025 Weak high pressure across this morning will give way to a developing pre-frontal trough over western NC in the afternoon.
The upper-level ridge over the central US will shift westward over the next couple of days. This will allow an upper level trough to slowly shift westward into eastern Texas by mid week.
- There is a daily low to medium (20-65%) chance of thunderstorms for much of the area, with the highest chances over western portions of the area early in the week, shifting eastward later in the week. WV imagery this afternoon shows the upper ridge centered roughly over the ArklaTex, and extending southwest beyond the Rio Grande Valley. Monday, the ridge begins developing west toward the Four Corners.
1243 PM CDT Sun Aug 17 2025 High pressure surface and aloft centered just to our west will help result in a rather hot day across the CWA again today. /22/ Upper level high pressure prevails over the area and with the subsidence expect mainly just isolated thunderstorm activity this afternoon. Little will change tomorrow, as upper high pressure remains over the region.
The remnants of yesterdayâs cold front are drifting eastward this morning, serving as the focus for light showers and isolated thunderstorms across southwest Idaho. Radar has shown activity from Rome, Oregon through the Lower Treasure Valley into Valley County over the past few hours.
Upper level ridging will remain stagnant over the region through today. Subsidence from the upper ridging should prevent convective development, however with current water vapor imagery indicating a monsoonal moisture plume over the region and southerly surface upslope winds in response to a lee side trough, we can expect isolated to scattered showers and thunderstorms to develop over higher terrain once convective temperatures have been reached and track into our region. Southerly surface flow and mostly sunny skies today will keep temperatures warm in the lower to mid 90s on the Caprock and upper 90s off the Caprock.
By tonight, a tranquil evening is in store with overnight lows remaining mild in the lower 70s.
209 PM EDT Sun Aug 17 2025 A cold front will move south across the area today.
232 PM CDT Sun Aug 17 2025 - Muggy conditions into Monday, then more comfortable in the low to mid 80s mid to late week. These have dissipated this afternoon, but with the warm front a little further south the temperatures across northern Iowa have remained in the low 80s. Should showers hang around longer, temperatures will likely be several degrees cooler than currently forecast. Right now the warm front is draped across north central Iowa roughly near the highway 20 corridor. This wave will progress across Iowa through Monday morning, diminishing in strength through the morning as support from the low level jet tapers off. Temperatures cool behind the wave with highs in the low 80s middle to end of the week.
-Wilson /Issued 833 AM MDT Sun Aug 17 2025/ - Meteorological Overview: Southwesterly flow aloft today will gradually give way to upper level ridging for midweek this week, bringing a change from unsettled weather today and Monday to hot and dry conditions. Even as our upper level pattern begins to shift towards upper level ridging on Monday, just enough moisture will remain to allow for a few isolated showers and thunderstorms to develop.
203 PM CDT Sun Aug 17 2025 High pressure surface and aloft centered just to our west will help result in a rather hot day across the CWA again today. Otherwise, high pressure surface and aloft centered just to our west will continue through Monday. This will lead to warmer than normal temperatures through the period. /22/ Upper level high pressure prevails over the area and with the subsidence expect mainly just isolated thunderstorm activity. Little will change, as high pressure remains over the region.
Another interesting detail is a cloud line forming just west of the Upper Keys with less cloud cover observed over the Lower and Middle Keys than yesterday around this time. Looking ahead, the western Atlantic subtropical ridge will remain firmly in place through at least the early parts of this week, providing light to gentle breezes that will be occasionally variable. From synopsis, a broad ridge stretching from the North Atlantic westward across the Florida Peninsula will result in light to gentle easterly breezes across the Keys coastal waters through early this week.
121 PM EDT Sun Aug 17 2025 A cold front will bring a round of scattered showers and a few thunderstorms through this afternoon, followed by cooler weather for the start of the work week. An area of low pressure will approach the Great Lakes region through mid-week bringing a period of unsettled weather. A cold front currently drop south into the region. An area of Canadian high pressure building into the region will bring a fair and cooler day Monday, with high temperatures in the 70s, with some upper 60s for the higher terrain.
Cooler conditions with cloudy skies and periods of showers along the coast will continue through the middle of the week as troughing continues offshore. A warmer and drier pattern will develop later in the week as high pressure builds over the southwestern US.
- Muggy conditions into Monday, then more comfortable in the low to mid 80s mid to late week. These have dissipated this afternoon, but with the warm front a little further south the temperatures across northern Iowa have remained in the low 80s. Should showers hang around longer, temperatures will likely be several degrees cooler than currently forecast. Right now the warm front is draped across north central Iowa roughly near the highway 20 corridor. This wave will progress across Iowa through Monday morning, diminishing in strength through the morning as support from the low level jet tapers off. Temperatures cool behind the wave with highs in the low 80s middle to end of the week.
713 PM EDT Sun Aug 17 2025 A cold front will finish moving through the region this afternoon with scattered showers and isolated thunder. Cooler air will move into the region behind the front, bringing very comfortable conditions through mid week. Key Messages: - A cold front finishes moving through the region this afternoon to early evening, with scattered showers and isolated thunder. - Much cooler and drier air in place through mid week with northerly flow across the region. Chances for impactful weather this afternoon were already on the low side, and continue to lower, courtesy of earlier-than- anticipated convection spreading clouds across most of the area to limit daytime heating. Much drier and cooler air will dive into the region from Canada. Cool air remains across the region through mid week as high pressure slides across Canada.
639 PM CDT Sun Aug 17 2025 (This afternoon through Monday night) The local area will remain under the influence of a gradually retreating upper high. With the eastern extent of the high still resulting in weak subsidence aloft, expect slightly below normal rain chances with a delayed onset in convection until the mid to late afternoon. The delayed convective onset and lower coverage will allow afternoon temperatures to rise into the mid to upper 90s, or roughly 3-6 degrees warmer than normal for this time of year.
A cold front will continue south across the area and reach the Ohio River tonight. High pressure will build from the north behind this feature and influence the area through Monday. The front will return north as a warm front on Monday night.
748 PM EDT Sun Aug 17 2025 Canadian high pressure sliding from Ontario to Quebec will bring cooler and drier weather through Monday. An area of low pressure will then approach the Lower Great Lakes through midweek and bring a period of unsettled weather.
721 PM EDT Sun Aug 17 2025 A cold front will continue moving through the region this afternoon and evening, bringing with it isolated to scattered chances for showers and thunderstorms.
934 PM EDT Sun Aug 17 2025 Canadian high pressure sliding from Ontario to Quebec will bring cooler and drier weather through Monday. An area of low pressure will then approach the Lower Great Lakes through midweek and bring a period of unsettled weather.
On Monday, temperatures climb up into the low to mid 90s with increasing moisture making conditions feels a bit uncomfortable. There is potential for some activity to develop near the coast early, however, the highest rain chances remain over the interior.
A relatively uneventful afternoon transitioned to a damp evening for the Lower Keys. Winds across the Lower Keys shifted just enough to allow patchy cloud lines to form and move across the islands. The tropical cyclone's circulation is both large and close enough to direct warmer, sinking air towards the Florida Keys. Looking ahead, the western Atlantic subtropical ridge will remain firmly in place through at least the early parts of this week, providing light to gentle breezes that will be occasionally variable. From synopsis, a broad ridge stretching from the North Atlantic westward across the Florida Peninsula will result in light to gentle easterly breezes across the Keys coastal waters through early this week.
652 PM EDT Sun Aug 17 2025 An upper ridge will remain centered to our west early this week.
617 PM CDT Sun Aug 17 2025 The upper-level ridge over the central US will shift westward over the next couple of days. This will allow an upper level trough to slowly shift westward into eastern Texas by mid week.
312 AM EDT Mon Aug 18 2025 High pressure builds across the eastern Great Lakes region from the north today.
132 AM EDT Mon Aug 18 2025 A cold front will continue south across the area and reach the Ohio River tonight. High pressure will build from the north behind this feature and influence the area through Monday. The front will return north as a warm front on Monday night.
Satellite imagery this afternoon shows fairly sparse cumulus fields developing over the higher terrain of the OR Cascades and the eastern mountains. Today through Monday: The PacNW will continue to sit under the influence of a broad upper low in the northeast Pacific, keeping temperatures near normal. Upper level ridging will begin to build northwest into the PacNW Monday, greatly decreasing chances of shower activity across the forecast area.
-Rainfall may be a little more widespread Tue-Wed as a cold front moves across the state.
Behind the wave, a ridging pattern will lead to a return of warm, dry conditions across the region. A ridge will begin to build into the region from Southwest US.
- High pressure meandering around the region will bring about periods of on and off scattered showers and storms.
Monday and Tuesday, the upper trough with a stable southwest flow will be present which will keep afternoon temperatures in check with values near seasonal norms for the interior. From mid week on, there's good agreement the four corners ridge will strengthen and nudge into our area with continued dry weather.
205 AM EDT Mon Aug 18 2025 A cold front will finish moving through the region this afternoon with scattered showers and isolated thunder. Cooler air will move into the region behind the front, bringing very comfortable conditions through mid week. Key Messages: - A cold front finishes moving through the region this afternoon to early evening, with scattered showers and isolated thunder. - Much cooler and drier air in place through mid week with northerly flow across the region. Chances for impactful weather this afternoon were already on the low side, and continue to lower, courtesy of earlier-than- anticipated convection spreading clouds across most of the area to limit daytime heating. Much drier and cooler air will dive into the region from Canada. Cool air remains across the region through mid week as high pressure slides across Canada.
1223 AM CDT Mon Aug 18 2025 Despite some subtle differences, the forecast over the next 7 days continues to feature a weak mid-level high pressure over the Central Plains shifting westward and expanding across the Four Corners region by Tuesday.
Showers and thunderstorms may be ongoing in the morning across WI and IL in the morning, but our well- talked about ridge will remain in play. The warm front lifts in early Monday morning while the cold front moves through Tuesday night.
The weather pattern for Southeast Texas will be dominated by a gradual shift in the upper-level ridge over the area that will be moving towards the Four Corners region through the early and middle parts of the week. This is due to a combination of factors: a light wind pattern, increasing moisture levels, daytime heating, the influence of the daily sea breeze, and small disturbances rotating around the periphery of the departing ridge.
Strong upper ridge will remain over the mid Mississippi Valley Monday and should allow heat indices to peak in the 100-105 degree range area-wide.
248 AM EDT Mon Aug 18 2025 Cooler air will move into the region today behind the departing front, bringing much more comfortable temperatures through mid week.
Warmer trends and the possiblility of heat risk by the end of the week are to be expected as ridging sets in and high pressure becomes the prevailing trend. Conditions that brought light precipitation over the weekend will transition as a ridging pattern up stream, sets in by mid to late week. Stratus is becoming less resilient as the evenings are showing improvements which will continue as high pressure and subsidence build.
Despite some subtle differences, the forecast over the next 7 days continues to feature a weak mid-level high pressure over the Central Plains shifting westward and expanding across the Four Corners region by Tuesday.
The upper and mid levels start to shift and build high pressure over AZ/NM Monday evening into Tuesday. This then helps to develop a ridge that reaches up over western SD and parts of central SD by the mid-week. Despite there being some high pressure over central and northeastern SD, there is still a moist environment with some instability present through the day Tuesday that could help with shower and storm development. As the ridge builds to the north, some drier air is push up in to WY and western SD, with some variation in the models as to any of the drier air moving into central SD.
A slight (10-20%) chance of afternoon and evening showers and thunderstorms exists in the higher elevations of the Sierra Nevada today.
Current temperatures across the island chain are in the lower 80s. From synopsis, a broad ridge stretching from the North Atlantic westward across the Florida Peninsula will result in light to gentle easterly breezes across the Keys coastal waters through early this week.
With deep moisture remaining across the north assocd with a dissipating trough, locally heavy rain will again be a threat with one or more Flood Advisories possible. The HIGH risk of rip currents will persist all week. Surface ridging builds south of the area as Erin departs northeastward and out to sea.
1248 AM EDT Mon Aug 18 2025 Following yesterday's cold frontal passage, dry and much cooler conditions will prevail through Tuesday before temperatures return to more seasonal levels by week's end. Both Monday and and Tuesday look dry, with high temps ranging in the lower to middle 70s across much of our area. In dewpoints, Monday looks to be the driest of the two days with values dropping into the lower to middle 40s.
An upper level ridge will linger across much of the eastern CONUS, gradually elongating from southwest to northeast over the course of the day. The influence of the ridge will lead to another warm day across north and central Georgia. Drier air underneath the ridge will also drop dewpoints into the upper 60s to low 70s this afternoon and serve to somewhat suppress afternoon thunderstorm chances. As Hurricane Erin continues to move northeastward across the Atlantic, the influence of the ridge is expected to keep it offshore and begin to steer it more northward away from the eastern CONUS. High temperatures within this wedge feature are forecast to be limited to the mid to upper 80s, though highs will still rise into the low to mid 90s in central Georgia and northwest Georgia.
courtesy of Canada originated high pressure building south into the area. High pressure will slowly move off to the east. Again, expect those warmer readings to center in favored downslope areas near and south of Grand Traverse Bay.