Aikyam-Lab/Synoptic-Bench huggingface dataset:
258 PM EDT Sat Mar 17 2018 A very cold night is on tap tonight in the wake of a cold front for tonight. One or more low pressure systems are expected to develop off the mid Atlantic coast midweek and currently look to pass far enough south of our area to keep us dry. the cold front extended from the gulf of Maine through southern New England. especially across northern and eastern sections in proximity to the upper low.
417 PM CDT Sat Mar 17 2018 A cold front has become stationary around the Interstate 30 corridor this afternoon, but with a strong cap in place, precipitation development will be limited. However, a strong upper trough continues to dig southeast towards the Southern Rockies and a weak upper disturbance is currently passing over Texas strengthening southwest flow aloft. As the previous mentioned trough moves into the Rockies, the stalled surface boundary will move back north as a warm front and large scale ascent will spread over the area.
228 PM EDT Sat Mar 17 2018 High pressure shifts S and E of forecast area through Sunday. and high temp forecast Sunday in the lower 80s inland.
On Sunday, capping should limt precipitation to just some weak showers in the morning but fcst soundings show the cap weakening between 18-21z, convective temps in the lower 80s and PW values increasing to 1. The drier air will allow for some cooler temps over the western half of the CWA.
Upper low moving through the area tonight will bring a good chance of rain, and snow to elevations above 5000 feet in Lincoln and Mohave Counties.
416 PM CDT Sat Mar 17 2018 Low pressure moving into the Tennessee Valley will continue to drag stratus southeast in its wake tonight. Meanwhile, guidance is showing ridging building aloft and forecast soundings indicate a strong subsidence inversion due to this ridge. This stratification will likely allow little chance for the low level stratus deck to mix out, especially given that our forecast area will remain in weak cold advection at least into early Sunday morning. However, with the thinking that those clouds will stick around for much of the morning and perhaps into early afternoon, think the colder side of guidance in the low to mid 50s for highs Sunday is appropriate.
225 PM EDT Sat Mar 17 2018 High pressure shifts S and E of forecast area through Sunday. and high temp forecast Sunday in the lower 80s inland.
302 PM MDT Sat Mar 17 2018 Multi-lobed upper low pressure complex over the PacNW and the northern Rockies continue to spin and rotate multiple smaller low pressure disturbances through our region of northeast Montana.
317 PM EDT Sat Mar 17 2018 Weak low pressure across the Ohio valley will slide southeast off the mid Atlantic coast as high pressure builds southeast across the Great Lakes region tonight.
Overall surface pattern will continue to remain relatively unchanged today through tonight with Atlantic high pressure ridging west across the region and a near stationary frontal boundary sagging south into northern Alabama by late tonight. Lows tonight expected to be in the low to mid 60s.
Afternoon composite analysis reveals northern Michigan remains sandwiched between deep troughing/cold air across Ontario/New England and warmer air/ridging through the central CONUS. only to return once again on Sunday as the low departs to the SE. and potentially some shallow SCT-BKN stratus development with the front Sunday as the low departs to the SE. aforementioned cloud cover issues and slightly stronger low level winds makes that problematic and statistical guidance sources certainly are running warmer with tonights lows as compared to last nights.
At the surface, weak riding prevails across east TN and SW NC/VA, albeit amidst a warm and increasingly unstable airmass behind a warm front that looks to now be setting up along the I64 corridor in KY/WV/VA. A regional surface analysis favors waa with dewpoints on the rise, generally in the low/mid 50s at this time, with further moistening expected. Sunday looks to be a rather nice partly cloudy day as the front pushes southward yielding temperatures nearly 8-10 degrees cooler than today, all amidst dry conditions.
Although the radar scope was clear of any showers and thunderstorms early today, we still expect that to change this afternoon, as a cold front sags into the area.
1258 PM CDT Sat Mar 17 2018 A broad swath of stratus extends from the upper low over Kansas City along an inverted trough to the northeast across central Nebraska into the Dakotas. This area of stratus is progged to move to the east as the upper low moves east today. Areas over north central Nebraska will be the last to clear with resultant cooler temperatures there only in the 30s this afternoon. Clear skies tonight with southeast winds ahead of upper trough to the west. Diffluence aloft over the Panhandle and upslope flow there is the possibility for some light mixed precipitation along the Pine Ridge.
/ISSUED 1016 AM CDT Sat Mar 17 2018/ At 800 AM, a cold front extended from about Texarkana to Abilene to Dalhart with a dryline extending from about Abilene to Del Rio. Convective temps are in the lower 90s with dry air noted in the 900-700 mb layer. Global models show 500 mb ridging increasing over the CWA this afternoon and a speed max over West Texas will place SE TX in a subsident zone this afternoon.
1217 PM CDT Sat Mar 17 2018 Pleasant, spring-like weekend for the local area as high pressure at the sfc and a loft meanders across the region. Clouds, any lingering pcpn across the south will exit south/southeast early this morning as the parent low pressure system spins toward the ohio river valley. Temperatures look to top out 5 to 10 degrees above the mid March normals - with some locations warming into the lower 50s. Cooler, Canadian air works in starting Mon, and temps back to the seasonable normals are expected into mid week. Good southerly fetch ahead of the trough will supply plenty of moisture to fuel pcpn development.
323 PM CDT Sat Mar 17 2018 Ridging at the surface and aloft over the Plains this afternoon, keeping a northerly component in the winds over the forecast area. Cooler air filtering into the region, but the stubborn stratus associated with the low passing through the Midwest into IN this afternoon is slow to erode. Lighter winds in the overnight combined with llvl moisture still trapped in the low levels may slow the progression of the low clouds to the southwest.
1239 PM CDT Sat Mar 17 2018 A much quieter day in store, as low pressure over northern MO and southern IA will continue to pull away from the region. Upper level ridging builds into the region on Sunday, providing for a milder day with highs in the 40s, though nearing 50 degrees through the lower MO River corridor.
130 PM EDT Sat Mar 17 2018 Mostly low VFR to MVFR conditions expected today/tonight as llv moisture remains prevalent ahead of an approaching cold front from the north.
But the low level flow should be lower tonight. A short wave trough will traverse eastward through north Texas this evening and into the Arklatex region overnight. A secondary short wave trough will emerge from northern Mexico into the Edwards Plateau Sunday morning. This short wave trough is expected to lift to the northeast through north Texas Sunday afternoon. But there will be southern extension to trough axis moving across south-central Texas during the afternoon. Moisture is expected to increase Sunday in the 925-850 mb layer with GFS/NAM/SREF depicting a modest theta-e ridge axis over the coastal plains by Sunday afternoon. The low level convergence will be rather weak however, until late afternoon as sea breeze strengthens a bit. But warm and moist air advection across the cooler shelf waters tonight should lead to another episode of dense sea fog.
328 PM CDT Sat Mar 17 2018 High pressure will gradually build eastward into portions of the Central Great Lakes by Sunday Night, while an inverted trough develops over the Central Dakotas due to a developing Colorado Low. This will allow for strong radiational cooling before clouds move in, so overnight lows are a few degrees cooler than the previous forecast. Lows range from the teens across Inland locations, to the low to mid 20s along the Lake Superior Shoreline. With the increased cloud cover, expect cooler temperatures in comparison to today, but it still will be 5 to 10 degrees warmer than normal.
423 PM EDT Sat Mar 17 2018 High pressure centered over the Great Lakes will provide dry weather tonight. A weak cold front will push through the area Sunday.
1244 PM CDT Sat Mar 17 2018 Upper circulation was located over south central Iowa at 07Z with radar showing precip dissipating rapidly over western Iowa on the backside of the low. By tonight mid level ridging will move into the region with warmer temperatures for Sunday. Another strong upper trough will be moving into the southern Rockies during the day on Sunday bringing increasing clouds and a chance of showers by late afternoon to western parts of the area.
521 PM EDT Sat Mar 17 2018 A cold front was bisecting the forecast area from east to west late this afternoon, with a low pressure system tracking along the front from central into eastern KY. Freezing level and wet bulb zero height are quite low, which favors large amounts of small hail. Another low pressure system heading east from the southern plains will pull the front back north toward KY as a warm Sunday night.
247 PM MDT Sat Mar 17 2018 The low pressure trough and cold front that has brought widespread snow showers to western Wyoming today will move through the area this evening with moisture and instability decreasing. The trough and cold front will spread showers across the south first then over much of the area east of the Continental Divide with rain snow mix changing to snow this evening.
233 PM EDT Sat Mar 17 2018 High pressure centered over the Great Lakes will provide dry weather tonight. A weak cold front will push through the area Sunday.
335 PM EDT Sat Mar 17 2018 The central Great Lakes will be influenced by a high amplitude upper level ridge and its remnants in the coming days. Evolution of pattern late this weekend is one for the ridge to break down as fresh jet energy becomes reintroduced in the southern stream just south of Arizona. Thus, a pattern of deep column stability and surface ridging is favored. Models show surface ridging in control with full sunshine. Another day of moderation, 850mb temperatures a 2-3 degrees C warmer than Saturday, should allow temperatures away from the larger bodies of water to warm to near 50 degrees.
Tonight, warmer and more moist air starts to be advected in. With temperatures in the critical threshold of mid 30s there could be mix of rain, freezing dirzzle and snow Sunday afternoon and evening.
143 PM EDT Sat Mar 17 2018 Aviation An area of low pressure will track up the Ohio Valley today. A weakening cold front will dissipate as it moves into the region tonight.
A mid level low pressure systems continues to strengthen over central Idaho this afternoon, pulling moisture north through portions of the Northern Rockies. However, overnight tonight, the low will continue to gain strength aiding in further enhancement of snow.
243 PM EDT Sat Mar 17 2018 Low pressure system brings rain and storms across the WV/VA/KY borders this afternoon and evening.
Surface wise, a ridge of high pressure is centered over the southern half of the Sunshine State and the adjacent Gulf and Atlantic waters.
112 PM PDT Sat Mar 17 2018 Low pressure and a few showers or thunderstorms exit the central California interior by early tonight. High pressure then builds in Sunday with slightly warmer temperatures.
A piece of energy from a large upper level trof will move push into western Montana through late this evening, bringing a round of snow to our mountains and areas north and west of Livingston and Roundup through the weekend. This system lifts north toward eastern zones on Sunday evening, impacting the east, while main trof axis shifts into the west.
Surface pressures will fall Sunday afternoon and evening and a Pacific Cold front will push through as well late Sunday.
Expect cooler temperatures Sunday and Sunday night before high pressure brings a warming trend the first half of the new week. The associated cold front currently near far western Arizona looks just a tad slower, and should push across SE AZ between 3AM and early afternoon.
343 PM EDT Sat Mar 17 2018 High pressure will begin to build into the region tonight.
121 PM EDT Sat Mar 17 2018 Continued dry weather is expected today and tonight under a mid- level high pressure ridge. Highs today under mostly sunny skies will range from the mid to upper 30s east to the lower 50s southwest and south central. Only thing of note is that there could be an increase in clouds late tonight along an approaching cold front from Ontario. Confluent mid/upper level flow will support high pressure through nrn Ontario into the northern Great Lakes.
257 PM EDT Sat Mar 17 2018 Low pressure system brings rain and storms across the WV/VA/KY borders this afternoon and evening.
A cold front will cross the area Tuesday afternoon and evening bringing showers and thunderstorms, some of which will be strong. Highs will range in the lower to middle 80s. Late this week through the weekend will be dominated by a large-scale trough across eastern North America.
206 AM EDT Mon Aug 21 2017 Above normal temperatures will persist across the Ohio Valley through Monday ahead of a cold front. The cold front will bring showers and thunderstorms on Tuesday, then drier and cooler air moves in for the rest of the week. Much of any convective activity on Monday would likely dissipate after the sun sets, but as a cold front approaches will continue with very low pops across the northwest corner of the CWA late at night. Expect the main threat with the line to be damaging winds with locations northwest of Dayton having the lowest threat and a higher threat along and just southeast of Interstate 71. The cold front will move through Tuesday night. This will be followed by cooler and drier conditions for several days.
300 AM MST Mon Aug 21 2017 A decrease in monsoon moisture today will limit convection to mainly the higher terrain of Gila County through Tuesday.
403 AM EDT Mon Aug 21 2017 High pressure will build south of the area today. Low pressure will approach from the west on Tuesday.
Mon afternoon, showers and tstms are expected to develop over and near the higher terrain, and along the I-25 corridor, while much of the southeast plains is expected to be dry. Temps on Mon are expected to be a little cooler than today. Models in good agreement with a cold front dropping south behind an upper disturbance late Monday night into Tuesday morning turning flow northeasterly in the low levels.
307 AM EDT Mon Aug 21 2017 A weak pressure trough will linger in the forecast area through Tuesday. High pressure centered off the coast will cause increased moisture in a southeast to south flow. However, the moisture will remain shallow because of upper ridging and limit thunderstorm coverage.
We do not expect to alter the low POPs this evening.
Synoptically, a dampened ridge prevails across much of the Southeast along with a maritime tropical airmass. Finally, after eclipse and any storms dissipate this evening, anticipating temperatures to drop modestly into the low to mid 70s. By Tuesday, the eclipse will be over and life should return back to normal as the dampened ridge moves off the east and an amplifying large scale trough moves across Manitoba and Ontario. There is a short wave forecast to pivot around this trough through the Great Lakes region resulting in surface cyclogenesis over Quebec. As the front approaches, a pre-frontal trough will push across central TN on Tuesday evening and into the TN Valley during the overnight.
338 AM CDT Mon Aug 21 2017 Subtropical ridge centered off the NC coast stretches to TX with a closed low over the CA coast. Circulation between this high and low pulling Pacific moisture across Mexico and into SE NM and W TX. This low will spin over CA the next several days before lifting NE over the ridge late in the week. By the weekend the ridge will build over the Western US.
High pressure will build over the Pacific Northwest today and Tuesday, then shift eastward. After some areas of morning low clouds and fog, mostly sunny skies and warmer temperatures are expected.
346 AM CDT Mon Aug 21 2017 A broad subtropical ridge extends from west to east from the Southern Plains into the western Atlantic this morning. Temperatures today will be near climatology for late August with highs in the low to mid 90s. Rain chances will be on the increase Tuesday afternoon as a cold front approaches the area from the north.
The large scale pattern will amplify considerably through Tuesday and a cold front will move south into the area.
405 AM EDT Mon Aug 21 2017 High pressure moving off the Mid Atlantic coast will bring a warm and increasingly humid southerly flow to the region into Tuesday. A strong cold front will move through the region late Tuesday and Tuesday night. Cooler and drier conditions will return for the second half of the week. High pressure will slide off the coast and a warm and more humid airmass will return to the region. Convection will tend to decrease quickly after sunset with a warm and muggy night in store ahead of an approaching cold front.
Upper and surface ridging will limit convection as well as cloud cover today. Due to the high number of people outside viewing the eclipse and the many venues, heat exhaustion and sunburn will be a concern.
The Key West radar is showing only a few lingering light rain showers northwest of the Lower Keys. The Atlantic high pressure cell is building westward and expanding. The Atlantic ridge mentioned above, will strengthen as it merges with a continental high pressure moving across the Ohio Valley, and combines with the remnants of Harvey moving through the Caribbean. Winds will increase through today, then gradually decrease overnight as the low over the Caribbean crosses Central America. The pressure gradient is building across the area due to the Atlantic high pressure, and the remnants of Harvey passing through the Caribbean. As the low over the Caribbean moves over Central America overnight, the pressure gradient will collapse resulting in decreasing winds.
An area of low pressure off the southern California coast will continue to pull moisture northward into the region today, resulting in rain showers and isolated thunderstorms developing through the day.
627 AM EDT Mon Aug 21 2017 High pressure into Tuesday. strong cold front late Tuesday/Tuesday night. Cooler and drier high pressure into the weekend. With weak high pressure in control today and tonight, the biggest effect on our weather will be lowering maximum temperatures by 1 to 2 degrees due to the eclipse this afternoon. For tonight, high pressure does slide eastward, but still controls things with a tranquil and mild night. As the uppe level trough digs into the Great Lakes, there will be two actual cold front pushing through the Ohio Valley and the mountains.
With increased moisture, should see temperatures a degree or two cooler today, but still around normal.
607 AM EDT Mon Aug 21 2017 A weak pressure trough will linger in the forecast area through Tuesday. High pressure centered off the coast will cause increased moisture in a southeast to south flow. However, the moisture will remain shallow because of upper ridging and limit thunderstorm coverage.
A cold front stretching from extreme northern Ontario through western Lake Superior and into northern Wisconsin, as of the middle of this afternoon, will continue shifting east through this evening. High pressure will build into the Northland tonight, leading to mostly clear skies and very light wind flow. A broad/subtle upper-level trough will approach and then move into the Northland Tuesday.
203 AM EDT Mon Aug 21 2017 High pressure into Tuesday. Strong cold front late Tuesday/Tuesday night. Cooler and drier for the end of the week.
With the persistent upper low now located over the central Gulf of Mexico, the anticipated increase in moisture across the entire area has commenced, with an uptick in shower and storm activity and increase in cloud cover as a result. A second, weak upper trough will approach the area from the east today, unfortunately yielding an increase in cloud cover for eclipse viewers and chances for showers and thunderstorms this afternoon. As for storm chances, the Gulf Coast seabreeze and the approaching upper low will influence development, thus the highest chances will be across the Florida Panhandle and across the eastern third of the forecast area. Afternoon highs today will generally be cooler today due to increased cloud cover and an interruption in solar radiation courtesy of the Great American Eclipse.
Expecting to see some streamer showers develop on the nose of the higher PWAT airmass and the best coastal convergence closer to sunrise. The upper ridge over the area will move to the northwest through the period as the TUTT low over the eastern Gulf of Mexico moves to the west. The high temperatures will be slightly lower on Monday with increased cloud cover.
High pressure ridging will build across the forecast area today into Tuesday. This will result in dry conditions and slightly warmer temperatures. Afternoon highs today will be in the lower 80s, with upper 80s to around 90 degrees expected for most areas on Tuesday.
If these values managed to make it into the area without modifying, they would be near the lowest values recorded for this time of year. This wave appears to be slower-moving, and it will begin interacting with the trough/frontal axis across the northeastern US, and likely stall over or near South Florida.
An upper low over the Gulf of Mexico will continue tracking west away from the region through the short term period. Another weak trough off the Florida East Coast will also track west beneath a ridge of high pressure over the Carolinas. This approaching trough will increase cloud cover on Monday along with the chance for afternoon showers and thunderstorms. High temperatures both days will generally be in the lower 90s.
Some channeled vorticity appears to be focused across southern Illinois, Southwest Indiana, and southeast Missouri, so sufficient lift may be available to tap the low level instability. Unseasonably cool conditions will take us right through the latter half of the work week as Canadian originated high pressure drifts slowly east across the Great Lakes region. This high will suppress the summer heat well to the south of our region.
234 AM EDT Mon Aug 21 2017 High pressure will bring dry and seasonably hot weather to the region for the start of the work week.
330 AM CDT Mon Aug 21 2017 (Today and Tonight) An upper level ridge centered across the Southeast United States will stretch into Texas today and tonight, resulting in generally hot and dry conditions for West Central Texas. Overnight lows will be in the low to mid 70s.
Upper low continues to spin through the Central Gulf as upper ridging from the Western Atlantic nudges back into the region while a small upper low moves over the SE Bahamas.
Temperatures will then rebound and top out in the lower 90s in most areas by late in the day. As the trough pushes eastward on Tuesday, a surface cold front will settle southeast.
Tuesday looks mostly dry as an upper level ridge begins to build overhead, but cannot rule out some mountain precip if the monsoonal moisture plume stuck within the ridge makes it up to our area. Midlvl subtropical ridge will be located across New Mexico on Wed/Thurs with west to southwest flow aloft across the CWA.
128 AM EDT Mon Aug 21 2017 High pressure will bring dry and seasonably hot weather to the region for the start of the work week.
219 AM EDT Mon Aug 21 2017 High pressure building into the region through Monday morning will settle to the south and east Monday afternoon, allowing a weak warm front to approach Monday night.
315 AM EDT Mon Aug 21 2017 High pressure will bring dry and seasonably hot weather to the region for the start of the work week.