Aikyam-Lab/Synoptic-Bench huggingface dataset:
1046 PM EDT Tue Aug 20 2024 A broad low pressure area extending from the New England coast into the Canadian Maritimes will be slow to lift to the northeast the next couple of days. At the same time, high pressure over the Great Lakes will nudge ever so slowly east toward the area and become the dominant feature by the end of the week.
613 PM EDT Tue Aug 20 2024 A broad area of low pressure along the New England coast into the Canadian Maritime will be slow to lift to the northeast the next couple of days. At the same time, high pressure over the Great Lakes will nudge ever so slowly east toward the area and become the predominate feature by the end of the week.
Still looks like much cooler temperatures overnight tonight and as clouds clear temperatures should drop another 5 to 10 degrees. Record low temperatures still look likely across northeast and east central Tennessee in the lower to mid 50s. Chattanooga area looks warmer near 60 with some clouds and warmer start this afternoon so no record there. (This evening through Wednesday) A highly amplified pattern will continue across the Conus, with a trough over the Atlantic coast and a ridge over the Plains. Daily Record Low Minimum Temperatures Date Chattanooga Knoxville Tri-Cities Oak Ridge 08-21 56(1927) 57(1893) 53(2012) 56(2012) (Wednesday night through next Tuesday) Key Messages: 1.
After a fairly active late afternoon and short break early this evening, isolated convection has recently redeveloped along parts of the Lower and Middle Keys, apparently along a reactivated leftover island cloud line. Surface analysis depicts a cold front off the Eastern Seaboard, becoming a stationary front across North Florida and over the northern Gulf of Mexico. This surface pattern is supported by an unusually deep mid latitude trough aloft for August, anchored over the eastern Great Lakes and extending southward all the way to north Florida and the SW Atlantic. Otherwise, expect temps to slowly drop to the lower 80s by morning.
818 PM EDT Tue Aug 20 2024 High pressure along with cooler and drier air moving into the region will dominate the weather into the weekend.
A mostly clear night tonight with lows falling into the lower 70s. Highs will be in the lower to middle 90s, but the lower dew points will constrain the heat index values to 100 or less.
735 PM EDT Tue Aug 20 2024 High pressure building down from the northwest will bring mainly dry and near to slightly-below normal temperatures through late this week. A surface cold front is now off the coast with a mid-level trough axis overhead. This trough is expected to remain overhead while dampening through Wednesday. All of this translates to remarkably pleasant weather for mid-August with morning lows in the mid-60s and daytime highs reaching the low- mid 80s on Wednesday.
Issued by National Weather Service Mobile AL 1243 AM CDT Wed Aug 21 2024 (This evening through Wednesday night) Upper ridging was centered over the southern Rockies this afternoon with troughing along the Atlantic Coast. Precipitable water values through Wednesday night are expected to remain in the lowest quartile climatologically across the area, and near daily minima in some areas.
A field of altocumulus clouds have developed in association with the low pressure system over the northeast. We are currently on the backside of an exiting trough, so we have cool, sinking air filling in. With that, our temperatures today are only forecast to get into the low to mid 80s for areas west of the Cumberland Plateau. Lows will be in the low to mid 50s. Wednesday looks more of the same with cooler temperatures and lower dew point temperatures.
Well to the northwest of the local area, weak convection is occurring from eastern SD into northern MO in conjunction with a mid-level vort max digging south-southeastward in the gradient flow between a subtropical high over eastern NM and an upper low across the northeastern CONUS. At the surface, light NNE flow will persist between a high over the Great Lakes and a weak area of low pressure that will track westward along the northeastern Gulf Coast.
The deep longwave trough that stalled over the Eastern United States for the past couple of days will finally begin to break down as the Atlantic ridge shifts westward across the Florida Peninsula. Variable breezes will not last long and the Atlantic Ridge will become the dominant feature for the upcoming seven days.
Showers and isolated thunderstorms are expanding across north-central Idaho and northwest Montana this morning as a trough from the west enters the region. As the trough continues to move through the region, additional instability this afternoon will lead to more showers and thunderstorms in central Idaho and west-central/southwest Montana. Thursday will also bring warmer temperatures across north-central Idaho and western Montana.
148 AM EDT Wed Aug 21 2024 Cooler weather continues into the second half of the week with plenty of clouds and showers likely through Thursday.
The pattern aloft features a broad ridge that puts the greater Ozarks region in a northwesterly flow pattern. The northwest flow regime will bring below average temperatures, peaking in the mid-80s to the far southwest and in the low 80s elsewhere; temperatures may not even break the 80 degree mark further toward central Missouri. Low temperatures are forecast to be between the low 60s and low 50s, with the coolest conditions furthest east.
GOES water vapor satellite imagery shows fairly dry air in the mid to upper troposphere rotating over our area on the top of the strong subtropical ridge centered over New Mexico. The main areas to watch will be Carbon County, the vicinity of the higher terrain, and possibly around a local convergence boundary on the north side of the North Platte River Valley in between Scottsbluff and Alliance. The western flank of the subtropical ridge will break down tonight and allow moisture to flood northward once again out of the Gulf of California region across Arizona and Utah towards our area. Cooler temperatures near the surface and warmer temperatures aloft will reduce instability somewhat, so there is a little more uncertainty in whether storms will manage to get going on Thursday.
Highs will be in the lower to middle 90s, but the lower dew points will constrain the heat index values to 100 or less. Lows will be in the lower half of the 70s.
339 AM EDT Wed Aug 21 2024 Upper level low pressure approaches the region today and then crosses the area on Thursday.
(Today through Thursday Night) A large area of high pressure will wobble from the Great Lakes to the Ohio Vally and mid-Atlantic states through the near term. Clockwise flow around the high will continue to usher in a mild east/northeast wind, and this will result in below average temperatures. Looking aloft, troughing east of the Mississippi River will will slowly exit toward the Atlantic Ocean. Ridging over the Plains will gradually build in our direction.
343 AM EDT Wed Aug 21 2024 High pressure will provide for dry conditions through the rest of the week. Temperatures will remain well below normal with afternoon highs in the low to mid 70s.
1205 AM CDT Wed Aug 21 2024 (This evening through Wednesday) Upper air analysis this early afternoon depicts an Omega Block situated across North America with the subtropical ridge, analyzed at 598 dam on the objectively analyzed upper air charts this past morning, becoming centered over West Texas as per recent water-vapor imagery. Overnight, the subtropical ridge will continue to drift eastward as its position is modulated by a northern-stream, positively-tilted, inverted trough with a closed low embedded within that will dig southward offshore the Alexander Archipelago and into the Pacific Northwest.
(Today through Thursday) A large upper ridge persists over the central states and a weakening upper trof pattern over the eastern states maintain a dry, deep layer northerly flow over the forecast area for today and tonight. A weak surface trof/frontal boundary oriented over the northern Gulf slowly drifts into coastal portions of the forecast area, likely aided by the sea breeze, but deep layer moisture looks too limited to consider convective development with this feature. Highs today and Thursday will be mostly in the mid 90s, and lows tonight range from the mid 60s well inland to the lower/mid 70s closer to the coast.
347 AM EDT Wed Aug 21 2024 (Today through Thursday) High pressure will continue across north and central GA through the period. A couple of waves of low pressure are expected to develop along this boundary and move east across the northern Gulf of Mexico and emerge out into the western Atlantic. These individual low pressure waves could enhance some convection in the vicinity of the frontal boundary and enhance the seabreeze front across SE GA.
238 AM CDT Wed Aug 21 2024 - High pressure and mild weather will continue through Thursday, with temperatures in the mid-upper 70s. Upper ridge continues to slowly build and shuffle east over the area, with a weak wave currently passing through. Enjoy the weather over the next 24-48 hours, as the heat is quickly approaching! With an omega block forecast to briefly set up across the United States, we will remain under high pressure, which will result in a continued mild pattern across the area. Temperatures are forecast to be slightly warmer on Thursday (upper 70s) but low humidity will make conditions quite pleasant for mid-week.
Given the continued NW flow and high pressure at the surface, it is no surprise that overnight temperatures will also be quite cool. Both tonight and Wednesday night will see temperatures drop down into the low 50s, with some of the deeper valleys going into the mid and upper 40s. With the cooler temperatures and calming winds, we will likely see fog set up again in the deeper valleys overnight. As an upper-level ridge builds across the southern U.
Furthermore, forecast soundings indicate a relatively persistent dryness in the higher and lower-levels respectively situated above and below the aforementioned layer of saturation tonight. Tonight's lows will bottom out in the lower 60s, which is near or slightly below-normal for this time of year.
(Today through Thursday) The upper level ridge over New Mexico will continue to dominate our weather through the short term period. At the surface, there is a stationary front draped along the eastern edge of the ridge extending from the Texas Panhandle to Galveston. This boundary has the low level winds out of the southwest and this should continue at least through the morning today. High temperatures will reach 100 everywhere with 105 or higher everywhere except the highest parts of the Hill Country and southern Edwards Plateau. The stationary front to the east may begin to erode the upper ridge slightly starting Thursday and some minor height falls may take a couple of degrees off the high temperatures.
103 AM EDT Wed Aug 21 2024 High pressure along with cooler and drier air moving into the region will dominate the weather into the weekend.
Low temperatures are forecast to be in the lower to middle 60s. another fairly well organized weather system moves through the area during the afternoon through overnight hours, in between high pressure over Texas and low pressure off the Oregon coast.
1148 PM EDT Tue Aug 20 2024 Low pressure will slowly exit across the Maritimes through Wednesday.
223 AM EDT Wed Aug 21 2024 High pressure along with cooler and drier air moving into the region continues to persist into the weekend.
(Wednesday through Thursday) Upper-level ridge across central Texas to maintain northerly flow of subsident air across the ArkLaTex through the short-term period ending Thursday. At the surface, broad high pressure centered across the Great Lakes region ridging south across the Mississippi River Valley into the ArkLaTex will allow for much cooler temperatures areawide. Despite cooler temperatures across much of the region, portions of Deep East Texas could still see heat index values lingering up to 105 degrees due to a shallow cool layer in the wake of the cold front along with lingering low-level moisture. Overnight low temperatures tonight are forecast to range from the lower 60s across south Arkansas to around 70 degrees across Deep East Texas.
335 AM EDT Wed Aug 21 2024 A low pressure trough lingers nearby today, followed by building high pressure for the remainder of the week.
- Cooler temperatures take hold for the latter part of the week with more cloud cover and precipitation anticipated. This will work to limit convective coverage this afternoon and evening with higher-terrain areas experiencing the highest chances for showers and storms. Regardless, afternoon convection is likely tomorrow afternoon with showers and storms initiating over the high terrain. On Thursday, we will be under southwest flow aloft thanks to a low pressure off the coast of WA/OR and high pressure over TX. Places that clear out in the morning will have the higher chances, but still nonzero for other locations that may stay cloudy.
Quiet weather is expected through the short term as we find ourselves on the back side of an upper level trough. Overall, temperatures in the low 50s should be widespread with values in the 40s in rural / sheltered locations.
/Issued 116 AM CDT Wed Aug 21 2024/ /Through Thursday Afternoon/ The latest upper air analysis and water vapor satellite imagery shows the dominance of an Omega Block pattern with a subtropical ridge centered over New Mexico bookended by upper lows/troughs near each coast. Over the next few days, the weakening upper trough in the Pacific Northwest will be swiftly overtaken by another strong low dropping southward along the British Columbia coast. As this low dives south it will nudge the subtropical ridge eastward maintaining a concern for excessive heat through the short term period. The upper ridge/high will continue to slowly shift eastward on Thursday with the center passing over western North Texas. Amidst east-southeasterly flow in the lower levels, a slight increase in humidity will push heat indices higher than seen in previous days.
Given the continued NW flow and high pressure at the surface, it is no surprise that overnight temperatures will also be quite cool. Both tonight and Wednesday night will see temperatures drop down into the low 50s, with some of the deeper valleys going into the mid and upper 40s. With the cooler temperatures and calming winds, we will likely see fog set up again in the deeper valleys overnight. Ridging will start out centered over the southern Plains, while two cutoff lows spiral over northern New England in the East, and just off the coast of the Pacific Northwest. The southern Plains ridge will expand northeast with time, allowing for rebounding 500 mb heights across the Tennessee and Ohio valleys through the weekend.
1229 AM EDT Wed Aug 21 2024 High pressure building down from the north will bring cooler and mainly dry conditions through late week. A surface cold front is now off the coast with a mid-level trough axis overhead. This trough is expected to remain overhead while dampening through Wednesday. All of this translates to remarkably pleasant weather for mid-August with morning lows in the mid-60s and daytime highs reaching the low- mid 80s on Wednesday.
133 AM EDT Wed Aug 21 2024 A broad low pressure area extending from the New England coast into the Canadian Maritimes will be slow to lift to the northeast the next couple of days. At the same time, high pressure over the Great Lakes will nudge ever so slowly east toward the area and become the dominant feature by the end of the week.
Still looks like much cooler temperatures overnight tonight and as clouds clear temperatures should drop another 5 to 10 degrees. Record low temperatures still look likely across northeast and east central Tennessee in the lower to mid 50s. Chattanooga area looks warmer near 60 with some clouds and warmer start this afternoon so no record there. (This evening through Wednesday) A highly amplified pattern will continue across the Conus, with a trough over the Atlantic coast and a ridge over the Plains.
High pressure remains centered over Lake Superior this evening, with the Ohio Valley on the southern periphery of the high. Compared to this time last night, temperatures are running about 5-8 degrees cooler, and dewpoints are running about 3-6 degrees drier. Previous discussion > The blocking pattern with a highly amplified ridge stretching from the Hudson Bay down through the Four Corners region remains in place at the start of the period. CVG 45F (1950) CMH 44F (1950) DAY 46F (1950) Have most areas dropping into the low 50s/ upper 40s. The only site that may tickle a record would be DAY (forecast low of 47F), however, would not be surprised to see some low 40s during early morning hours in our cooler valley spots.
100 AM EDT Wed Aug 21 2024 A broad low pressure area extending from the New England coast into the Canadian Maritimes will be slow to lift to the northeast the next couple of days. At the same time, high pressure over the Great Lakes will nudge ever so slowly east toward the area and become the dominant feature by the end of the week.
The exception for this will be across the Bighorn Basin and the lower elevations of Johnson County, which were lucky enough to be stuck behind the stalled front all day yesterday; these areas will warm by about 10 degrees.
426 AM EST Sun Feb 9 2025 - Outside of some light lake enhanced flurries or patchy freezing drizzle early this morning, expect dry conditions with partly to mostly cloudy skies today.
Updated at 220 AM CST Sun Feb 9 2025 A dense fog advisory for morning along and south of I-10 Two cold fronts to push through: today and mid week.
602 AM EST Sun Feb 9 2025 (Today through Monday) Deep layer ridging will prevail today and as we begin the new week. The high temperatures remain just above normal, rising into the low to mid 80s each day with overnight lows cooling into the 60s.
927 AM EST Sun Feb 9 2025 High pressure will shift east across the region today through Monday, leading to dry and seasonable conditions.
615 AM EST Sun Feb 9 2025 - Outside of some light lake enhanced flurries or patchy freezing drizzle early this morning, expect dry conditions with partly to mostly cloudy skies today.
A more potent cold front moves through the state late tonight into Monday morning, bringing a stronger push of cold air advection and potentially some snow showers, although we are only carrying a slight chance of snow across the far south on Monday morning.
Updated at 300 AM CST Sun Feb 9 2025 - Low chance of light freezing rain this morning in higher terrain areas of northwest Arkansas.
607 AM EST Sun Feb 9 2025 High pressure will shift east across the region today through Monday, leading to dry and seasonable conditions.
422 AM EST Sun Feb 9 2025 With the low pressure system east of the region, lake effect snow develops later today off of Lake Ontartio.
522 AM CST Sun Feb 9 2025 Updated at 300 AM CST Sun Feb 9 2025 - Low chance of light freezing rain this morning in higher terrain areas of northwest Arkansas.
943 AM EST Sun Feb 9 2025 High pressure will build in today through Monday.
530 AM CST Sun Feb 9 2025 Today and tonight: A cold front is currently pushing southward across the area. So far, shower activity has been limited along the front, but it is ushering in low clouds and a cooler airmass in northerly CAA. The front will be clear of the entire area by tonight, with cooler conditions areawide. That being said temperatures will trend a few degrees cooler north of I-20 with southern counties/parishes seeing a continuation of relatively balmy temperatures.
- Light snow showers will develop across western WY today with the heaviest snow remaining in the higher elevations. Highs on Sunday will be on the cooler side ranging from the upper teens west of the Divide to upper 20s east of the Divide. The current forecast shows snow showers remaining mostly across the higher elevations of northern/central WY. The setup looks to be a deep trough that digs across the western CONUS. The southerly extent of the trough will be a key factor in determining what and where impacts will be seen.
Even though the cold front has moved through Middle TN into the Gulf states, weak impulses embedded into zonal flow aloft are allowing the atmosphere to squeeze out some rain.
Temperatures are hovering in the lower to mid 70s, with dewpoints near 70, and winds on land from the east to southeast at 10 to 15 mph. Surface analysis looks very similar to the past several days, with high pressure over the western Atlantic extending westward across the Florida peninsula and along the northern Gulf coast, to the south of a frontal boundary draped from the Mid Atlantic region to the Southern Plains. Aloft, deep ridging continues to dominate our region. High temps will be very similar to the past several days, climbing into the lower 80s. We expect little change across the Keys through the next few days, with the deep ridge aloft remaining dominant, while Atlantic high pressure maintains moderate easterly flow at the surface.
639 AM EST Sun Feb 9 2025 With the low pressure system east of the region, lake effect snow develops later today off of Lake Ontartio. The cold front is moving through with the freezing drizzle coming to an end. Some patchy freezing drizzle may persist at higher elevations through about 10 am.
319 AM MST Sun Feb 9 2025 - Dry and slightly warmer today, but still below average - Very cold for the first half of the week, with light snow on Monday A broad, low-amplitude trough covers the northern CONUS. At the surface, high pressure sits over eastern SD. Slightly warmer air will advect into the region today, ahead of the next arctic front.
A cold front is currently moving SE through northern Louisiana.
942 AM EST Sun Feb 9 2025 With the low pressure system east of the region, lake effect snow develops later today off of Lake Ontartio. The cold front is moving through with the freezing drizzle coming to an end. Some patchy freezing drizzle may persist at higher elevations through about 10 am.
526 AM CST Sun Feb 9 2025 (Today through Monday) A 500mb cut off low will continue to meander northeast of the lower Texas coast into Monday with a spoke of energy following off of Northeastern Mexico.
NDDOT travel cameras in the area show light snow falling underneath the low stratus, so did go ahead and add slight chance POPs to the northwest for the next few hours. A more potent cold front moves through the state late tonight into Monday morning, bringing a stronger push of cold air advection and potentially some snow showers, although we are only carrying a slight chance of snow across the far south on Monday morning.
Much cooler temperatures will prevail over the Midsouth today, following last evening's cold frontal passage.
547 AM CST Sun Feb 9 2025 Much cooler temperatures will prevail over the Midsouth today, following last evening's cold frontal passage.
514 AM CST Sun Feb 9 2025 Updated at 512 AM CST Sun Feb 9 2025 A dense fog advisory for morning along and south of I-10 Two cold fronts to push through: today and mid week.
1033 AM MST Sun Feb 9 2025 - Dry and slightly warmer today, but still below average - Very cold for the first half of the week, with light snow on Monday A broad, low-amplitude trough covers the northern CONUS. At the surface, high pressure sits over eastern SD. Slightly warmer air will advect into the region today, ahead of the next arctic front.
- A cold front will arrive Monday, bringing colder temperatures and light snow chances east of the Divide.
Beautiful SUNday it is for the Florida Keys! Temperatures have warmed to the lower 80s and skies have continued to have limited cloud coverage. This similar pattern of mild conditions is expected to continue through the next few days as deep ridging aloft dominates our area. This is due to a mid latitude trough moving across the US and pushing a cold front at the surface levels. Just beyond our forecast package, guidance continues to suggest a possible cold front making it down to the Keys as a secondary deeper trough develops across the eastern US.