Aikyam-Lab/Synoptic-Bench huggingface dataset:
948 PM MDT FRI AUG 19 2016 Satellite imagery this evening shows a NW flow aloft across the Northern Rockies and MT downstream of a large upper level ridge across the eastern Pacific. At the surface, high pressure is sliding SE across WY with generally light winds across N-central and SW MT, becoming southerly later tonight into Saturday. Hoenisch UPDATED 2335Z High pressure at the surface slides from MT tonight into WY Saturday for dry conditions with generally light surface winds. Upper level ridge off the west coast gradually moves inland for a NW flow aloft over the region.
738 PM EDT FRI AUG 19 2016 High pressure will move east of the area Saturday.
1037 PM MDT FRI AUG 19 2016 Water vapor imagery shows upper trough across the central CONUS with the main axis crossing the MT/ND border into ne WY. Surface analysis shows high pressure across MT pushing into the CWA. Precip will continue eastward late this aftn into the evng as the trough axis crosses the area. High pressure subsidence will then bring dry weather to the area for the remainder of the night and through Saturday. Colder temps across the higher BH are expected with lows in the mid to upper 30s. a secondary wave is progged to drop down the backside of the departing trough.
In the low to mid levels of the atmosphere, a feeble Atlantic ridge of high pressure will extend across south Florida overnight. In the upper levels of the atmosphere, a trough of low pressure will be located over the Florida Straits tonight.
910 PM EDT FRI AUG 19 2016 High pressure will move east of the area Saturday.
856 PM MDT FRI AUG 19 2016 Upper low and wave that brought the widespread precip last night into this morning has moved well east of the state. Sunny skies and warmer temperatures, although still below normal, can be expected for Saturday. Northwest flow aloft pushing drier air into the region but cold temperatures under a sharp upper level trough combining with moist ground to produce small isolated showers. Temperatures on Saturday will rebound as leeside troughing promotes better mixing but some residual moisture may cut a degree or two off of maxes due to evaporative cooling.
Also, expect precipitation chances to increase late tonight into the morning as a cold front approaches from the northwest.
702 PM CDT FRI AUG 19 2016 Afternoon water vapor imagery shows a mid/upper trough over the Dakotas. Higher chances arrive overnight as the trough axis enters western MN. Have centered the highest precip chances between 06Z and 18Z for MN, and through 21Z for WI counties. Due to the trough being centered overhead and accompanied by extensive low cloud cover and precip on Saturday, high temperatures will likely be the coolest we have experienced since around the 1st of June, which is around 10 to 15 degrees below normal for this time of August.
736 PM EDT FRI AUG 19 2016 Aviation A strong cold front will push across Southwest Michigan Saturday evening. Behind the front cooler and less humid air will arrive.
Rain chances will increase late tonight into the morning hours as another short wave approaches the area and a cold front moves further east into Missouri and Oklahoma. Also, expect precipitation chances to increase late tonight into the morning as a cold front approaches from the northwest.
This boundary was moving southward and has interacted with the higher instability and produced some decent thunderstorms. Sct to nmrs shwrs and tstms will develop across north Alabama during the afternoon hours and linger into the evening, with lesser coverage across the southern counties of central Alabama which will be closer to the low level ridge along the Gulf coast.
1251 AM EDT SAT AUG 20 2016 High pressure centered over the region will shift offshore tonight and remain anchored off the coast through Saturday night.
Cyclonic circulation around a weak upper low centered just west of Point Conception continues to draw smoke from the Cedar Fire westward and across the southern half of our forecast area. The upper low is forecast to remain quasi-stationary through the weekend, which will mean continued easterly flow aloft and continued transport of smoke over our area. However, the low level winds are forecast to be mostly out of the west which should help mix cleaner marine air into the boundary layer and help lower smoke concentrations near the surface, except for those areas in close proximity to the Soberanes Fire. If this trend continues overnight, we can expect at least slightly warmer conditions inland on Saturday. SFO Bridge Approach.
1119 PM CDT FRI AUG 19 2016 Afternoon water vapor imagery shows a mid/upper trough over the Dakotas. Higher chances arrive overnight as the trough axis enters western MN. Have centered the highest precip chances between 06Z and 18Z for MN, and through 21Z for WI counties. Due to the trough being centered overhead and accompanied by extensive low cloud cover and precip on Saturday, high temperatures will likely be the coolest we have experienced since around the 1st of June, which is around 10 to 15 degrees below normal for this time of August.
Closer to daybreak on Saturday, a cold front will be moving through the region shifting winds to the north and becoming breezy. This cold front will also bring the possibility of MVFR CIGS at all TAF sites during the morning hours and perhaps persisting into the afternoon. /issued 323 PM CDT FRI AUG 19 2016/ Cooler temperatures and shower/storm chances highlight the short term as a cold front will move through the region late tonight and Saturday morning.
625 PM CDT FRI AUG 19 2016 Early afternoon surface analysis indicated a cold front from northern IA into northern KS. The upper air analysis did indicate that the better flow was trailing the cold front limiting effective shear, and the orientation of the cold from northeast to southwest along the deep-layer shear vector suggest any organization to the thunderstorms will likely be linear. We will also see a stronger cold front associated with the stronger trough that will bring in much cooler and drier air, along with gusty northwest winds overnight. A touch of fall is likely on Saturday night with some upper 40s possible in the better radiational cooling locations, but everyone should see overnight temperatures drop into at least the lower to mid 50s.
NAM12 spatial cross-sections appear to hang onto the low level cloudiness through 12z Sat mrng. Surface cold front now into Northern larimer and Northern Weld counties and expected to be into the Denver area towards 4 pm local. Thunderstorm activity will decrease from North to South through the evening hours as stronger subsidence moves in behind the trof. Expect drier conditions on Saturday with cooler low levels and more stable airmass.
939 PM EDT FRI AUG 19 2016 High pressure centered over the region will shift offshore tonight and remain anchored off the coast through Saturday night.
The cold front extends from central IA/KS into northwest OK. as upper trough moves into the central Plains tonight.
Cloud cover will once again keep temperatures down, with highs only reaching the low to mid 80s once again. Chattanooga Airport, TN 73 86 74 84 / 40 70 40 70 Knoxville McGhee Tyson Airport, TN 69 84 72 83 / 30 70 50 70 Oak Ridge, TN 71 84 72 83 / 30 70 50 60 Tri Cities Airport, TN 67 83 69 81 / 30 70 60 70.
Thunderstorms are still expected to impacted the region later tonight as a cold front, with an accompanying wind shift from the north, moves in from the north.
1031 AM EST Wed Nov 9 2016 A cold front will move through the region today bringing widespread showers that will diminish late this afternoon and evening. Cooler conditions are in store for the second half of the week and lasting into the upcoming weekend. A brief surge of cooler and drier air overnight tonight into Thursday should keep us dry and could be the start of a prolonged dry period.
In the terrain and higher elevation valleys, including Anaconda and Butte, high temperatures in the 60s and high 50s will be well above normal as high pressure persists. Inversions will keep lower valleys a bit cooler, with stable conditions and slightly degraded air quality.
Latest surface observations and radar imagery show that the cold front has entered northern AL.
247 AM PST Wed Nov 9 2016 High pressure will prevail into the weekend with dry conditions, light winds and above average daytime temperatures.
Otherwise, a mid deck of stratus encompasses much of the region as broad divergence/ascent lingers over the region in the base of a passing upper trough. The actual front will pass through this afternoon and early evening, though rain is expected to quickly exit the area this morning as drier mid level air follows the upper trough axis shifting past the area. A few cooler pockets over the north and east part of the area could dip into the upper 30s, where I cannot entirely rule out a few spots of frost.
indicative of the higher cigs generally N of I-20. low cigs farther S along/just S of the H500 trough has resulted in sct areas of -DZ/-RA across Lower E TX/Ncntrl LA. with the elongated upper trough extending from the Ark-La- Tex WSW into SW TX/Nrn MX expected to close off later today just W of the Big Bend region and Nrn MX. Sfc ridging will build S into the Red River and Lower MS Vallies Thursday.
Strong high pressure will bring persistent mild and dry weather through the period.
445 AM CST Wed Nov 9 2016 Cirrus spilling around the upper ridge centered to our west will be the extent of cloud cover we see as today continues what is perhaps the most remarkable aspect of this stretch of mild weather we have had to start November, the lack of cloud cover in what is typically one of our cloudiest months. At the surface, a ridge axis centered from Kansas to Lake Superior this morning will push down into the Ohio Valley tonight. The thermal ridge today will remain centered out in the Dakotas, but will start working into western MN, where highs in the upper 60s will again be likely downwind of the Buffalo Ridge.
1006 AM EST Wed Nov 9 2016 Little moisture is associated with a cold front that will cross the area this afternoon.
635 AM EST Wed Nov 9 2016 A cold front crosses the region today.
712 AM EST Wed Nov 9 2016 A cold front will move through the region today bringing widespread showers that will diminish late this afternoon and evening. Cooler conditions are in store for the second half of the week and lasting into the upcoming weekend. Sharpening 5h trof digging from the central GLAKS to western PA early this morning. Drier and cooler air will arrive into western/ northwestern sections late this afternoon. Cooler and drier air will overspread the remainder of the region tonight on brisk NNW flow. Canadian border will act to suppress persistent upper ridging of late and lead to general troffiness over the eastern third of the conus. Upper ridge may try to rebuild northward over the weekend.
high pressure is forecast to dominate the region through the next 24 hours. For tonight, temperatures will once again fall rapidly with mid 20s to lower 30s for most of the lower elevations, producing freezing conditions for vegetation.
435 AM CST Wed Nov 9 2016 (Today and Tonight) The upper level trough currently over the area, will eventually transition into a closed low that will retrograde southwest into northern Mexico by early Thursday. Upper level support will weaken through tonight as the low drifts farther away from the area. Lows tonight will range from the upper 40s north, to the lower 50s south.
/issued 435 AM CST Wed Nov 9 2016/ (Today and Tonight) The upper level trough currently over the area, will eventually transition into a closed low that will retrograde southwest into northern Mexico by early Thursday. Upper level support will weaken through tonight as the low drifts farther away from the area. Lows tonight will range from the upper 40s north, to the lower 50s south.
1048 AM EST Wed Nov 9 2016 Little moisture is associated with a cold front that will cross the area this afternoon.
923 AM CST Wed Nov 9 2016 A robust fall cold front has pushed across the Huntsville CWFA this morning, and now rests roughly south of the I-20 corridor. High pressure begins to settle in to our NW and winds should begin to relax throughout the evening.
For the most part, showers should remain light through the day, mainly affecting locations between ALI-LRD in proximity of the mid-level low pressure system.
531 AM CST Wed Nov 9 2016 259 AM CST A high pressure ridge just to our north shifts over the forecast area today. The high will settle over the southern U. Southwest winds increase as the pressure gradient tightens between the high and a low over Hudson Bay. Raised high temps into the low 60s.
950 AM EST Wed Nov 9 2016 Current water vapor and upper air analysis shows a strong ridge over the west, with a trough digging into the northeast and extending into the southeast. The pattern at the surface is a bit complex, with high pressure just to our northeast and an inverted trough over the northern Gulf of Mexico. For the rest of today, the trough over the northeast will amplify as the surface front lingers over the northern part of the peninsula. Rather light and variable winds are expected today across the waters, but then high pressure will build over the southeast and keep northeast winds in place through the end of the week.
1027 AM EST Wed Nov 9 2016 A cold front will move through the region today bringing widespread showers that will diminish late this afternoon and evening. Cooler conditions are in store for the second half of the week and lasting into the upcoming weekend. A brief surge of cooler and drier air overnight tonight into Thursday should keep us dry and could be the start of a prolonged dry period.
High pressure will then provide mostly dry weather over the lower terrain through the end of the week with seasonable temperatures. Cooler, but drier weather is forecast through the weekend. The upper level trough axis currently crossing the region is sustaining showers mostly south and east of PIT. Precipitation is expected to decrease as the day progresses while the trough shifts southeast. Upper level heights are progged to slightly rise given the development of the ridge across the central U.
In the low to mid levels of the atmosphere, a trough of low pressure will progress southward through north Florida this afternoon.
A coastal trough will develop offshore the lower TX coast tonight and this will provide elevated convection across the coastal sections of the CWA this evening. /issued 359 AM CST Wed Nov 9 2016/ SHORT TERM (Today through Thursday): 500mb tilted trough across Texas and northern Mexico will split and allow a low to cutoff across northern Mexico and west Texas today. This will provide a chance of elevated convection across the CWA today through Thursday as a coastal trough develops offshore the lower TX coast tonight into Thursday.
/12Z TAF/ Water vapor imagery this morning shows an upper level low closing off over W Texas with SW flow aloft over much of SE Texas. Cold front has pushed out into the Gulf so northerly winds have developed in its wake. /ISSUED 353 AM CST Wed Nov 9 2016/ A broad upper level trough will continue to keep the subtropical jet overhead Southeast TX today. Over the next few days, an upper low will form over northern Mexico, southern NM, and western TX. This upper low is expected to shear out and move into the plains over the weekend. Although a cold front moved through the area yesterday, the 850 mb front was well inland around the Red River Valley early this morning.
615 AM EST Wed Nov 9 2016 A cold front and upper level disturbance will sweep through the area today. High pressure will build in from the west tonight and Thursday.
625 AM MST Wed Nov 9 2016 Upper-level ridging will promote a tranquil weather pattern across the area through the period. A slight cooling trend can be expected thru the remainder of the period w/ a cold front on Thursday, but skies will remain clear and no precipitation is expected with continuing mild conditions.
603 AM EST Wed Nov 9 2016 Cold front passes early this morning.
654 AM EST Wed Nov 9 2016 A cold front will finish moving through the region this morning, with light rain diminishing to drizzle and clouds during the day, along with much cooler temperatures. High pressure will bring a temporary dry period Thursday.
542 AM EST Wed Nov 9 2016 A cold front will move through the region today bringing widespread showers that will diminish late this afternnoon and evening. Cooler conditions are in store for the second half of the week and lasting into the upcoming weekend. Sharpening 5h trof digging from the central GLAKS to western PA early this morning. Drier and cooler air will arrive into western/ northwestern sections late this afternoon. Cooler and drier air will overspread the remainder of the region tonight on brisk NNW flow. Canadien border will act to suppress persistent upper ridging of late and lead to general troffiness over the eastern third of the conus. Upper ridge may try to rebuild northward over the weekend.
A strong upper level ridge of high pressure over the west will persist through late in the week, maintaining dry and mild weather conditions.
1031 AM EST Wed Nov 9 2016 A cold front will move through the area today.
Watching the radar this morning and you might see a small speck of green right along the cold front as it moves through the area.
/issued 227 AM CST Wed Nov 9 2016/ High pressure will settle into the Mid-South today.
518 AM CST Wed Nov 9 2016 The synoptic pattern early this morning features an amplified flow regime, with a ridge across the western CONUS and a trough in the east. Surface ridging will nose into much of the central and southern Plains today, keeping light northerly winds in place over eastern MO/western IL. Despite the expected abundant sunshine, these winds should keep the cooler airmass in place and highs confined to the upper 50s/low 60s. Have undercut guidance across southeastern MO into south-central IL given this regime, which puts lows in the low 30s, perhaps even upper 20s in some of the typically cooler spots. Further north, as the ridge axis settles to the south, return southwesterly flow (albeit light) will commence towards daybreak.
The main story of this issuance looks to be drier air being drawn swd on the back side of the low which should lead to the end of precip and lower ceilings over the next few hours. Secondary story will be elevated nrly/nerly winds thanks to a tighter pressure gradient behind the low as well as developing CAA. At the surface, a fairly ill defined cold front is currently pushing through SW and Central Louisiana this morning. Aloft, an upper low is over Northern Mexico which is providing a bit of lift locally. High pressure over the plains will build into the region.
1026 AM EST Wed Nov 9 2016 High pressure centered to the west will keep dry weather over the region today through Thursday.
500 AM CST Wed Nov 9 2016 Latest 08z surface analysis shows high pressure over eastern Nebraska into central Minnesota. 00z GFS/NAM are in good agreement in building surface/upper level ridge axis into the Central Plains States today into tonight. as the models advect slightly warmer air into the forecast area. Southerly winds on backside of surface/upper level ridge will allow for warmer low temperatures tonight. 00z NAM is a couple of degrees celsius warmer at 925mb than the GFS/ECMWF.
512 AM CST Wed Nov 9 2016 Updated aviation section for 12z taf issuance The synoptic 500 mb pattern during the short term will consist of a strong ridge over the Plains and an equally strong trough centered over the East Coast. The associated cold front has moved through our region, and much of the area has cleared out. Most areas should fall into the mid 30s, and a few normally colder rural locations will drop to freezing. Milder southwest winds will develop on the back side of the high Thursday.
658 AM EST Wed Nov 9 2016 Aviation High pressure building in today will scour out clouds and allow skies becoming mostly sunny during the afternoon hours. An advancing cold front will bring windy conditions on Thursday with mainly sunny skies.
711 AM EST Wed Nov 9 2016 Marine High pressure building in today will scour out clouds and allow skies becoming mostly sunny during the afternoon hours. An advancing cold front will bring windy conditions on Thursday with mainly sunny skies.
556 AM CST Wed Nov 9 2016 Cirrus spilling around the upper ridge centered to our west will be the extent of cloud cover we see as today continues what is perhaps the most remarkable aspect of this stretch of mild weather we have had to start November, the lack of cloud cover in what is typically one of our cloudiest months. At the surface, a ridge axis centered from Kansas to Lake Superior this morning will push down into the Ohio Valley tonight. The thermal ridge today will remain centered out in the Dakotas, but will start working into western MN, where highs in the upper 60s will again be likely downwind of the Buffalo Ridge.
658 AM EST Wed Nov 9 2016 Wildfire smoke to continue this morning in east Tennessee a few more hours as winds have not picked up behind cold front.
638 AM EST Wed Nov 9 2016 Cloud cover will decrease by midday as high pressure builds into the southern Great Lakes. With sunshine this afternoon, high temperatures will reach the lower to middle 50s.
645 AM EST Wed Nov 9 2016 High pressure centered to the west will keep dry weather over the region today through Thursday.
543 AM CST Wed Nov 9 2016 High pressure was located across the region this morning with clear skies and light winds producing a wide spread in temperatures prior to sunrise.
555 AM CST Wed Nov 9 2016 Patchy low clouds will be possible this morning behind a departing cold front. High pressure will build in as the period progresses with skies becoming clear by late morning and then prevailing through the remainder of the period. Some low clouds continue behind the boundary but they are expected to clear out fairly early this morning as high pressure, currently located in the central plains, builds into the region. The high is expected to be located in the Tennessee Valley by the end of the period. Overall the upper pattern is quite amplified with an upper low over west Texas retrograding initially while undercutting upper ridging that will dominate the majority of the nation. Center of the high pressure will be over the state tonight for a rather cool Thursday morning.
544 AM CST Wed Nov 9 2016 Cool high pressure building into Illinois will provide tranquil weather for the short term period. The high resolution guidance are showing winds remaining northerly through the morning, then shifting a bit more NW this afternoon. The cooler side of that range will be along the Indiana border, where the clouds will linger and the colder mid level air resides.
948 AM EST Wed Nov 9 2016 A weak cold front continues to move through the North Country today accompanied by a few light rain showers.
A dissipating cold front will move through the region this morning.
628 AM EST Wed Nov 9 2016 A weak cold front continues to move into the North Country this early morning accompanied by a few light rain showers, and will swiftly shift through the area throughout the day.
804 AM EST Wed Nov 9 2016 Cold front passes early this morning.
/Issued 331 AM CST Wed Nov 9 2016/ A developing cut off upper low over north and central Texas will dig southwest into southwest Texas today.
Winds will continue to shift to the north this evening as a cold front moves into the area. Upper ridging builds in this weekend in advance of the next upper trough moving into the West.
924 PM EST Thu Nov 24 2016 Weak cold front across the VA Piedmont shifts south of the area tonight.
409 PM MST Thu Nov 24 2016 Water vapor shows short wave trof moving thorugh the wrn Dakotas with clear skies across MT/WY. After a cold night tonight, upper ridge will rebuild into the nrn plains for Friday, resulting in dry wx and warmer temps.
Cold front has pushed into NE OK and will make it through of western AR by sunrise Friday. with the expectation that the low clouds currently across E KS spread southeastward overnight keeping temps from cooling too far.