Aikyam-Lab/Synoptic-Bench huggingface dataset:
- Thursday afternoon into the evening, a second round of thunderstorms are expected to initiated along a cold front, with scattered severe storms possible. An approaching warm sector from a low pressure system coming out of the Northern Rockies is throwing an area of clouds and some showers over the Dakotas and western Minnesota early this afternoon. As the stacked upper level low continues to progress along the International Border, a cold front should continue to march from west to east through the day, eventually leading to a secondary round of thunderstorms igniting in the afternoon. Beyond Thursday, the Northland finds itself stuck between a high pressure over the southern Plains and an upper level trough bearing down from Canada.
408 PM EDT Wed Sep 18 2024 Weakening low pressure will bring unsettled weather through Thursday. Slightly cooler and drier weather will accompany persistent north-northeasterly winds over the weekend while high pressure maintains control. Best rain chances will be near the coast at the start of the period as low pressure departs to our northeast. High pressure will build in from the west where the forecast now remains mostly dry.
(Tonight through Thursday night) An upper level ridge continues to reside over the southern plains this afternoon. The low level pressure field has become somewhat ill defined. Temperatures and dewpoints are 0-5 degrees warmer than 24 hours ago. The upper ridge will strengthen during the short term period. The low level flow will become better established from the southeast tonight and continue through Thursday night. Subsident flow from the upper ridge will keep the weather dry through the period.
/Issued 112 PM CDT Wed Sep 18 2024/ /Through Thursday Afternoon/ An upper level ridge will continue to strengthen through the end of this week, leading to increasingly warmer temperatures each afternoon. Highs will range in the mid to upper 90s for most of North and Central Texas, with overnight lows in the low to mid 70s.
Fog is likely again tonight, followed by clearing and warmer temperatures on Thursday. Thursday During the day on Thursday, the tropical remnants, including the upper low, will shift further east. The drier air and eastward shift of this system will also allow for less cloud cover and notably warmer temperatures than today.
255 PM EDT Wed Sep 18 2024 (This afternoon through Wednesday night) The upper low over the Carolinas will open up within the broader E Coast trough over the next 24 hours. The trough will shift slowly as the upper ridge from TX to the lower OH Valley builds. At the surface, a weak quasi-stationary front with several waves of low pressure along across the S portion of the County Warning Area (CWA) will sink S tonight.
ridging aloft and at the surface will continue to dominate the pattern through the short term period.
441 PM EDT Wed Sep 18 2024 High pressure will remain in control across much of New York and northern New England.
1040 AM CDT Wed Sep 18 2024 Overall trends today suggest less cloud cover, and thus a warmer afternoon. Current temps are running at least a few degrees warmer compared to yesterday, thus forecast highs appear on track at this time. Temperatures should be warmer today due to less cloudiness, with afternoon highs generally ranging from the upper 80s to mid 90s.
- Thursday is dry, with slightly warmer temperatures. Most of its impacts remain outside the area, but cooler temperatures and isolated rain is possible. Current satellite shows an occluding low pressure system, centered over eastern Montana. Winds should be less than 20 mph by midnight, with the exception of the higher elevations, which continue to gust through Thursday morning. As the low exits the area, Thursday is much calmer with the winds. Otherwise, no precipitation is expected, with high temperatures peaking a little warmer than today.
/29 (Now through Thursday night) An upper trof over the eastern states begins to move off into the western Atlantic Thursday night while an upper ridge which extends from the south central states to the Great Lakes region inches eastward and strengthens a bit. A weak and diffuse surface trof over the coastal counties may allow for some spotty showers and storms to develop this afternoon. Lows tonight and Thursday night range from the mid 60s well inland to the lower 70s at the coast.
(Tonight through Thursday night) Mid-level ridging will hold steady over the area during the short term. Weak high pressure will also dominate across the Northwest Gulf leading to light to moderate onshore winds.
1252 PM EDT Wed Sep 18 2024 High pressure will continue to bring mainly dry and mild weather through the remainder of the week and into this weekend for most of the region. 240 AM Update: High pressure will remain in control over most of the area today and Thursday. Low pressure located along the Mid- Atlantic Coastline will track out to sea tonight.
1211 PM CDT Wed Sep 18 2024 Overall trends today suggest less cloud cover, and thus a warmer afternoon. Current temps are running at least a few degrees warmer compared to yesterday, thus forecast highs appear on track at this time. Temperatures should be warmer today due to less cloudiness, with afternoon highs generally ranging from the upper 80s to mid 90s.
1216 PM PDT Wed Sep 18 2024 * Low pressure will bring scattered showers and thunderstorms this afternoon through Thursday, with snow in higher Sierra elevations.
209 PM MDT Wed Sep 18 2024 Low pressure, currently over northeast Montana, will continue to drift northeast tonight through Thursday. Expect gusty winds and precipitation associated with the low to gradually push east/northeast and diminish with time tonight into Thursday morning. Plan on an additional 1 to 2 inches of snow in the high country, mainly above 9,500 ft through the rest of the afternoon before ending.
632 PM CDT Wed Sep 18 2024 (This evening through Thursday night) Seeing some isolated showers along the Mississippi Coast this afternoon, which lines up well with the low PoPs that were added for that area. The upper level trough sitting over the eastern CONUS will gradually start to move off into the Atlantic over the next day or so as an upper level ridge spreads eastward from the Southern Plains.
A passing low pressure system late this week and early this weekend will bring regionally breezy conditions, some higher terrain light showers, and keep temperatures near or below normal.
High pressure returns, bringing dry weather with near to slightly below normal temperatures through the end of the week.
726 PM EDT Wed Sep 18 2024 High pressure will remain over the area through Thursday morning. A cold front will cross the region Thursday afternoon.
1015 PM EDT Wed Sep 18 2024 A cold frontal passage and the passage of an upper level trof will result in a chance for showers and isolated thunderstorm thru Thu. Slightly cooler and drier weather will accompany persistent north-northeasterly winds Fri thru the weekend as high pressure builds in from the north. A sfc cold front dropping southward and a closed low opening up into a trof that will slide to the coast by daybreak Thu. Best rain chances will be near the coast at the start of the period as low pressure departs to our northeast. High pressure will build in from the west where the forecast now remains mostly dry.
627 PM CDT Wed Sep 18 2024 (Tonight through Thursday night) Mid-level ridging will hold steady over the area during the short term. Weak high pressure will also dominate across the Northwest Gulf leading to light to moderate onshore winds.
/NEW/ /Through Thursday Evening/ A strengthening ridge aloft will keep above-normal temperatures and rain-free conditions in place through the end of the work week. Lows in the lower to middle 70s tonight followed by highs in the mid to upper 90s on Thursday will be 10 to 15 degrees above normal for North Texas, and 5 to 10 degrees above normal for Central Texas.
227 PM MST Wed Sep 18 2024 A passing low pressure system late this week and early this weekend will bring regionally breezy conditions, some higher terrain light showers, and keep temperatures near or below normal.
827 PM EDT Wed Sep 18 2024 A cold frontal passage and the passage of an upper level trof will result in a chance for showers and isolated thunderstorm thru Thu. Slightly cooler and drier weather will accompany persistent north-northeasterly winds Fri thru the weekend as high pressure builds in from the north. A sfc cold front dropping southward and a closed low opening up into a trof that will slide to the coast by daybreak Thu. Best rain chances will be near the coast at the start of the period as low pressure departs to our northeast. High pressure will build in from the west where the forecast now remains mostly dry.
The frontal boundary associated with the low pressure system out west is currently in central ND and slowly working its way eastward. Otherwise, the main low pressure is still out in western ND as indicated on satellite, with a boundary approaching the Devils Lake Basin. Temps do seem like they will be trending more towards seasonal averages up until Wednesday when ridging builds back in. Several of the CAMs runs are not very impressive with storm development this evening, but do break out some elevated activity later tonight along the boundary as it moves through western MN thanks to the low level jet.
A low pressure system continues to churn offshore with just a rogue rain shower over the southernmost coastal waters to show for it. (This evening through Thursday) An upper level low remains off of the North Bay coast at this hour and will continue to drop southward throughout the day before moving onshore over the Central Coast tonight/tomorrow.
Weak high pressure holds over the region through Thursday with morning clouds but afternoon sunshine.
(Tonight) Tranquil weather across the Tennessee Valley this evening, with high pressure in control of our sensible weather. As a result, mostly clear and calm conditions are forecast once again, with temperatures dropping off into the low to mid 60s in most locations by early Thursday morning.
High pressure is centered over the Great Lakes with ridging extending back across much of the Midwest including central Illinois.
613 PM EDT Wed Sep 18 2024 High pressure will remain over the area through Thursday morning. A cold front will cross the region Thursday afternoon.
757 PM EDT Wed Sep 18 2024 An upper low over the area will move slowly east to the coast by early Thursday. A few showers or thunderstorms are possible Thursday mainly in the east Midlands closer to the upper low.
96 (This afternoon through Wednesday night) The upper low over the Carolinas will open up within the broader E Coast trough over the next 24 hours. The trough will shift slowly as the upper ridge from TX to the lower OH Valley builds. At the surface, a weak quasi-stationary front with several waves of low pressure along across the S portion of the County Warning Area (CWA) will sink S tonight.
1029 PM EDT Wed Sep 18 2024 High pressure will remain in control across much of New York and northern New England.
957 PM CDT Wed Sep 18 2024 Wx map shows weak high pressure over the Eastern U. Lows in the lower to mid 70s.
Cloud cover will be much slower to dissipate as we still remain under the large eastern trough. The upper low to our south will drift east and become absorbed into a trough along the Atlantic Seaboard. This seems most likely in eastern Ohio, where cloud cover will likely be the lowest.
The low pressure system that has brought cooler temperatures to the region and will bring rain and snow to the region tomorrow is sitting just off the coast of Northern California. Due to the early nature of the snow associated with this low pressure system, a Winter Weather Advisory has been issued for areas above 9,000 feet from 2pm today through 8pm tomorrow night.
731 PM EDT Wed Sep 18 2024 High pressure will remain in control across much of New York and northern New England.
643 PM CDT Wed Sep 18 2024 (Tonight) A weak area of low pressure over the Carolina's Piedmont should continue slowly moving eastward. Hi-res grand ensemble probabilistic guidance was hinting at a medium to high chance (40-70%) of fog/low visibility occurrence, with the higher chances more over NW Alabama (where the heaviest recent rainfall occurred),and a lesser chance for our more eastern areas given higher chances for residual clouds and a drier ground.
Current observations showed temperatures in the high 30s and 40s at elevations ranging from 7-10,000ft. Torgerson Low pressure, currently over northeast Montana, will continue to drift northeast tonight through Thursday. Expect gusty winds and precipitation associated with the low to gradually push east/northeast and diminish with time tonight into Thursday morning. Plan on an additional 1 to 2 inches of snow in the high country, mainly above 9,500 ft through the rest of the afternoon before ending.
(This afternoon through Wednesday night) The upper low over the Carolinas will open up within the broader E Coast trough over the next 24 hours. The trough will shift slowly as the upper ridge from TX to the lower OH Valley builds. At the surface, a weak quasi-stationary front with several waves of low pressure along across the S portion of the County Warning Area (CWA) will sink S tonight.
752 PM EDT Wed Sep 18 2024 Weakening low pressure will bring unsettled weather through Thursday. Slightly cooler and drier weather will accompany persistent north-northeasterly winds over the weekend while high pressure maintains control. Best rain chances will be near the coast at the start of the period as low pressure departs to our northeast. High pressure will build in from the west where the forecast now remains mostly dry.
Otherwise, a stable pattern will support mostly clear skies, light winds, and warmer temperatures on Thursday.
Otherwise, the main low pressure is still out in western ND as indicated on satellite, with a boundary approaching the Devils Lake Basin. Temps do seem like they will be trending more towards seasonal averages up until Wednesday when ridging builds back in. Several of the CAMs runs are not very impressive with storm development this evening, but do break out some elevated activity later tonight along the boundary as it moves through western MN thanks to the low level jet.
The high clouds will continue to move across during much of the night, but they will be on their way out near sunrise.
614 PM CDT Wed Sep 18 2024 (Tonight through Thursday night) Persistence will be the main driver of the short term forecast as a mid-level high builds over TX with an area of low pressure along the east coast and another low near the CA coast. Tomorrow heat indices will range 105-110 with the Coastal Bend/Coastal Plains expected to be on the higher end.
620 PM CDT Wed Sep 18 2024 (Tonight through Thursday night) An upper level ridge continues to reside over the southern plains this afternoon. The low level pressure field has become somewhat ill defined. Temperatures and dewpoints are 0-5 degrees warmer than 24 hours ago. The upper ridge will strengthen during the short term period. The low level flow will become better established from the southeast tonight and continue through Thursday night. Subsident flow from the upper ridge will keep the weather dry through the period.
Today's weather has been generally influenced by a dynamic low pressure system gradually cloud south along the coast. Instability and moisture wrapping around the low has produced some isolated showers this afternoon over high terrain in Trinity and Mendocino Counties. High pressure building over the eastern Pacific will gradually drift inland through the weekend.
Breezy and dry conditions with temperatures a few degrees cooler than normal through the work week.
The highest chance for showers and storms looks to be the Treasure Coast, though confidence is too low to include TEMPOs at this time.
A cold front will approach from the west late tonight, bringing scattered showers and storms to areas mainly near/west of I-57 through Friday morning.
1225 AM CDT Thu Sep 19 2024 (Tonight through Thursday night) An upper level ridge continues to reside over the southern plains this afternoon. The low level pressure field has become somewhat ill defined. Temperatures and dewpoints are 0-5 degrees warmer than 24 hours ago. The upper ridge will strengthen during the short term period. The low level flow will become better established from the southeast tonight and continue through Thursday night. Subsident flow from the upper ridge will keep the weather dry through the period.
A diffuse upper low is just south of the region, which has brought greater cloud cover slowing fog formation and slightly impacting radiational cooling. Cooler northeast flow will keep daytime high temperatures around the mid 70s to near 80.
(Today through Friday) Another couple of warm and humid days are in store for South Texas today and Friday as ridging aloft continues to dominate over the region.
In the upper lvls, a large trof will be present over the Western region of the CONUS while a persistent ridge will be over the CWA and Arkansas. At the sfc, high pressure will continue to meander around the region.
Much warmer temperatures with highs in the 80s to near 90 in Chattanooga, for example. Discussion: We start today on the back side of troughing aloft, thus northerly flow. Elsewhere for the day, weather will be dry with markedly warmer temperatures; highs in the mid to upper 80s for Knoxville and Chattanooga. For comparison climatologically speaking, Knoxville and Chattanooga will be about 5 degrees warmer than this date in September normally averages.
It will be continued dry with warmer than normal temperatures through tonight. Early morning water vapor imagery/RAP analysis showed a mid level ridge just to our northwest emanating from a 592dam high centered over southern Texas. This ridge was still resulting in northwest flow aloft across our region that was also continuing the feed of drier air aloft into our CWA. Ridging surface and aloft will remain dominant over our region through tonight. This will help temperatures top out warmer than normal and in the lower 90s this afternoon and hold temperatures warmer than normal Friday morning; in the upper 60s to near 70 degrees.
1240 AM CDT Thu Sep 19 2024 (Tonight) Tranquil weather across the Tennessee Valley this evening, with high pressure in control of our sensible weather. As a result, mostly clear and calm conditions are forecast once again, with temperatures dropping off into the low to mid 60s in most locations by early Thursday morning.
1131 PM EDT Wed Sep 18 2024 High pressure will remain over the area through Thursday morning. A cold front will cross the region Thursday afternoon.
1021 PM MDT Wed Sep 18 2024 - Conditions will remain dry and cooler than normal through late Friday.
Upper level ridge grabs hold Fri night with models continuing to struggle on how fast it breaks down in response to a stronger wave edging east across the Plains over the weekend. Quality of moisture return and progress of the trough will be key to determining if we have better chances for rainfall towards mid week.
This keeps rain chances near zero for the nature coast, with the highest POPs inland and across SWFL (50 to 60%).
Otherwise, we've go fog developing, but a bit more slowly given the high clouds. As a disorganized low pressure system in the mid- Atlantic region heads northward along the coast tonight into tomorrow, we will see a northerly wind develop by tomorrow afternoon.
The remainder of the day will be rinse and repeat from the previous days as high pressure remains the dominating feature. Highs will be a few degrees warmer than yesterday in the mid to high 80s.
1150 PM CDT Wed Sep 18 2024 Wx map shows weak high pressure over the Eastern U. Lows in the lower to mid 70s. High pressure developing overtop east Texas has brought about slightly warmer and drier conditions today, and as the high continues expanding overhead, this trend will continue to the end of the work week.
(Today through Friday Night) Surface ridging across the northern Gulf Coast and expansive mid- upper ridging aloft will maintain above normal temperatures and meager, if any, rain chances.
High pressure is centered over the Great Lakes with ridging extending back across much of the Midwest including central Illinois. Not a lot of change with the first cold front that moves through Thursday night and Friday. Geelhart Morning models continue to advertise that the persistent blocking pattern will begin to break down this weekend. The remnant low off to our east makes it about as far as the New England coast before drifting south again, but this should allow the upper ridge to break down as the low currently off the California coast swings through the 4-corners region. The earlier cold front never truly gets through the mid-Mississippi Valley, and will drift back northward this weekend as the low weakens somewhat and moves into the Plains.
Upper level ridge will remain in place and may even strengthen a little, with 850 mb temperatures forecast to inch up a little for this afternoon. This should mean that afternoon highs may be a degree or two warmer than what we have seen, pushing a few areas up towards the upper 90s.
- Much cooler temperatures coming this weekend. One trough sits over the Canadian Plains, while another spins just off the California coast.
1204 AM CDT Thu Sep 19 2024 (This evening through Friday) Weak high pressure remains over Arkansas, with a mix of sun and fair weather cumulus this afternoon. Large scale troughing will be noted over the western United States during the near term. On the leading edge of the troughing, a potent storm system will head from the northern Rockies into the northern Plains and eventually Canada Thursday/Friday. As this happens, a cold front will try to push toward us from the northwest. Otherwise, ridging in the central and southern Plains will build in our direction. Under the ridge, summer temperatures are coming, with above average readings in the forecast the next couple of days.
An occluded upper low pushes off to the northeast into the Manitoba province today.
Look for strong upper level ridging influences to build in from our west especially as Thursday progresses.
1245 AM CDT Thu Sep 19 2024 (Tonight through Thursday night) Mid-level ridging will hold steady over the area during the short term. Weak high pressure will also dominate across the Northwest Gulf leading to light to moderate onshore winds.
(This evening through Thursday) Cumulus has begun to develop in northwestern Oklahoma, and there remains some signal in both synoptic models and CAMs of seeing convection development across northwestern and western Oklahoma late this afternoon or this evening near an area of confluence in the low-level wind field. Winds veer ahead of this front Thursday proving a more downslope flow and warmer temperatures.
/NEW/ /Through Friday Afternoon/ A strong mid/upper-level ridge, currently extending from northern Mexico into the Middle Mississippi Valley, will persist through the end of the week even as a southern stream upper low prepares to eject toward the Plains. At the surface, ridging to the east and southeast will maintain the prevailing onshore low-level flow yielding unseasonably hot and precipitation-free conditions through the period. Temperatures will climb a few degrees higher than yesterday with morning lows in the low to mid 70s and daytime highs in the mid to upper 90s. Similar to the previous forecasts, sided with slightly warmer guidance as the NBM continues to be a bit too low, with high temperatures expected to climb into the mid to upper 90s Friday afternoon.