Aikyam-Lab/Synoptic-Bench huggingface dataset:
A low pressure system will bring isolated thunderstorms to eastern Nevada on Monday along with breezy conditions. Dry the rest of the week with a little cooler temperatures.
The upper level high pressure ridge over the great basin is still expected to build north into western Wyoming with warming temperatures spreading from southwest to northeast with time. Limited moisture will come up but the biggest change will be the surface warming destabilizing the lower levels enough for some mountains showers mainly in the afternoon and evening on Monday.
340 PM EDT Sun Jun 25 2017 High pressure will continue over the area tonight and Monday.
Northwesterly flow aloft over Montana diminishes today as an upper level high pressure ridge builds over the region.
The highest coverage should be east of I-75 during the late afternoon and early evening hours. Weak frontal boundary starts to sag south into Florida increasing moisture and bringing in cooler air aloft.
06Z has a weak front/boundary running from lower Michigan into northern Missouri with high pressure over the northern Plains. The area that appears to be favored for any rain is mainly the highway 20 corridor.
High pressure will shift east, allowing a mild southwesterly flow to develop across the region Monday.
A cold front will begin to cross the region Monday. Another cold front will approach northern Maine late tonight which will keep a chance of showers across mostly northern areas overnight. High temperatures today will range from the lower to mid 70s north, to the upper 70s to around 80 interior Downeast with mid to upper 70s along the Downeast coast. Low temperatures tonight will range from around 50 to the lower 50s north, to the mid 50s Downeast. A cold front is expected to approach from the northwest Monday then become stationary across the region. Low pressure will develop and move northeast along the front later in the day Monday.
226 PM MST Sun Jun 25 2017 High pressure will keep temperatures hot today and Monday.
655 PM EDT Sun Jun 25 2017 High pressure will continue to extend into the area from the west tonight through Monday.
Latest Key West Doppler radar base reflectivity data indicate a cluster of rain showers moving northwestward across the lower and middle Florida Keys and adjacent coastal waters. The large-scale pattern this afternoon features a deep layer mean anticyclone centered over the western North Atlantic, with a ridge extending westward to the southeastern United States. during the next few days, geopotential heights likely will fall slightly across the region as the subtropical anticyclone temporarily weakens in response to a midlatitude trough migrating across the eastern United States.
307 PM CDT Sun Jun 25 2017 For tonight, a warm front at 850 mb will lift northeast in conjunction with a weak disturbance in northwest flow aloft. Lows tonight remain very near previous forecast form the upper 40s northwest to the lower 50s southeast. On Monday, a broad trough will extend across the Great Lakes Region and Midwest with upper ridging moving east into the Great Basin. A weak backdoor cool front will bring an east to northeast wind, limiting any warmup in the east to the mid and upper 70s, while parts of the southwest reach the lower 80s.
Look for continued cooling inland through Monday as the ridge of high pressure that had been overhead continues to progress to the east. As expected temperatures are running cooler than yesterday especially for inland locations.
Will still maintain a 20 pop for isold -shra this aftn GFK/FAR/DTL areas in between the higher chance in LOW/Bemidji Northwest flow continues across the northern plains with showers lingering in the east this morning as another wave of precip advances to the SE from Saskatchewan. Convective temps on model soundings are start in the 50s and only rise to the low 60s by noon. After a cool start on Monday with lows in the 40s from ideal radiative cooling environment with high pressure to the west and clear skies, the full sun will allow temps to rise into the 70s for most locations. These south winds will set the stage ahead of a broad area of developing low pressure as heat and moisture return to the northern plains with temps in the 80s and dew points in the 60s.
555 PM EDT Sun Jun 25 2017 A slow moving cold front will stall along the coast tonight while high pressure builds in from the northwest. Cooler and drier air with lower humidity is expected through mid week. An upper level trough will continue over the eastern CONUS. An upper level disturbance moving through the base of the trough combined with slow moving frontal boundary will continue showers and thunderstorms from the eastern Midlands to the coast early this evening. Have forecasted overnight lows from the mid 60s north and west to the lower 70s southeast. 5 inches through the morning but lowering through the day as high pressure continues to build into the area. Temperatures will be slightly below normal with highs in the mid to upper 80s and lows Monday night in the lower to mid 60s.
321 PM CDT Sun Jun 25 2017 Sunshine and northerly winds led to a mild afternoon under Canadian high pressure.
123 PM EDT Sun Jun 25 2017 High pressure nudging east into the OH valley from the mid MS valley will bring sunshine and mild temperatures to the area today.
359 PM EDT Sun Jun 25 2017 Dewpoints have dropped into the 40s across much of the area, and will little cloud cover many spots will see lows cooler tonight than last night. A weak dissipating cold front will move into the area tonight but not have any real impact on the local weather. An approaching mid level short wave trough and associated cold front will bring an increase in cloudiness along with a chance of showers, mainly well after midnight.
While a cold front is forecast to move offshore tonight with weak lower tropospheric dry air advection, latest satellite and upper air data indicate a filling upper low that is about to also open up over the NW Gulf of Mexico. We think this will tend to shut off somewhat tonight as winds in that deep layer go more westerly and advect the moisture more along and to the rear of the low level front. After dark, cooling of the land will act to accelerate the low level front's southern progression once again. Lows tonight could fall to near 60 deg(F) north of the Highway 84 corridor (especially the far northern reaches of Wilcox and Choctaw counties of Alabama).
The cooler trends will continue tonight as effects from the high predominate. A reinforcing shot of cooler air from the north will keep the cool trend going on Monday, with highs only in the lower 80s, despite more sun than clouds.
349 PM CDT Sun Jun 25 2017 A band of showers along Interstate 20 in North Central Louisiana continue to exit the area as an upper trough axis moves east of the region.
The arrival of a cold front Monday evening will bring the potential for widely scattered showers and thunderstorms to the Idaho Panhandle and eastern Washington.
326 PM CDT Sun Jun 25 2017 Shower activity and another cool night ahead, followed by a sunny and warmer day on Monday highlight the short term period. This Sunday morning we saw temps reaching the lower and mid 30s in parts of the southwest, so lowered current forecast a tad, which is lower than any of the guidance.
258 PM PDT Sun Jun 25 2017 Cooler, but still remaining above normal into the weekend.
Quiet night tonight as heights rise across the area with a building ridge from the west. The upper ridge slides into the forecast area Monday with the axis making it to around Billings Monday afternoon.
A few of the cells have produced small hail and gusty winds, which is not surprising given relatively low freezing levels near 9 kft and a near dry adiabatic sub-cloud layer. Low to mid level lapse rates are poorer than today and with cooler boundary layer temperatures per 925-850 mb progs updraft strength in convective cores will not be as robust.
Only made some adjustments to pops/wx mention based off this morning's rendition of shower/thunder coverage and timing today as this area of low pressure moves over the CWA.
133 PM EDT Sun Jun 25 2017 A cold front stalls over the Carolinas today into Monday. High pressure builds into the area through midweek. Incrementally cooler and becoming a bit drier area-wide by evening. Broad trough aloft from the Midwest through the OH Valley into the eastern CONUS will control the wx today. Upper trough will drop across the Great Lakes through Mon. This feature will push the secondary cold front toward the local area Mon ,prmomg. Even cooler behind the secondary front. A cold front will continue to settle southeast through North Carolina this afternoon. Outlook: VFR conditions are likely for much of the work week as high pressure builds over the region.
349 PM EDT Sun Jun 25 2017 A weak low pressure troughs will form over land Monday and move offshore Monday night.
Northwest flow then begins to break down in response to northern stream trough digging into BC and a weaker wave lifting into the PacNorthwest. These troughs will merge as they cross the northern Rockies and eject out onto the Plains late in the week.
439 PM MDT Sun Jun 25 2017 Northwest flow continues across the northern Plains today as an upper ridge builds in from the western CONUS. Temps Monday will be slightly warmer than today with dry conditions continuing.
Otherwise a dry night with temperatures slightly warmer than last night due to airmass modification. Ridging aloft along with a relatively stable low level will preclude mention of showers or thunderstorms. As the ridge aloft moves overhead, temperatures will be even warmer than the previous night.
248 PM EDT Sun Jun 25 2017 Surface analysis this afternoon showed high pressure squeezed across the lower Ohio and Tennessee River Valleys. Meanwhile, a secondary cold front lies across central Illinois and central Indiana, pushing southeast toward our region. The aforementioned cold front will drop through our area this afternoon, bringing with it another invigorating, crisp push of Canadian air for the short term period.
Latest models continue to indicate cooler conditions today as the ridge of high pressure progresses to the east.
320 PM CDT Sun Jun 25 2017 As of 20z, a broad upper level trough was positioned across the upper midwest. At the surface, a cold front was located along Highway 400. As high pressure and dry air advection continues to build in, the front will continue to be shunted southward.
205 PM MDT Sun Jun 25 2017 High pressure still on track to amplify and center itself over the Four Corners through Monday due to a trough moving onshore the Pacific Northwest. By Monday night, high pressure begins to break down at lower levels.
323 PM EDT Sun Jun 25 2017 A cold front weakens offshore of the southeast coast through Monday. as high pressure builds over the region. stronger cold front will cross the area Monday afternoon and night. bringing cooler and drier weather through midweek.
Weak ridging and high pressure at the surface will make for mostly clear skies, and generally light winds tonight.
It will be breezy again too, adding to the feel of cooler conditions.
The upper ridge will continue to buckle with the ridge axis shifting east. A more pronounced short wave aloft rotating around the upper ridge will dive down east-southeast tonight promoting increased overnight convection.
232 PM EDT Sun Jun 25 2017 Ridge axis still overhead this afternoon bringing a light flow to the area with winds mainly out of the southwest except for our southern zones which are seeing winds more out of the south and southeast. Weak frontal boundary starts to sag south into Florida increasing moisture and bringing in cooler air aloft. This will result in warmer afternoon temperatures and late afternoon and evening thunderstorm coverage.
The cooler than normal air will be reinforced, with highs from the mid 70s to around 80 and continued comfortable humidity levels.
Otherwise, skies will be mostly cloudy to cloudy with lows falling into the low 70s.
long wave trough creating streaks of light precipitation across central plains this afternoon.
/Issued 821 AM CDT Sun Jun 25 2017/ Northwest flow aloft prevails over the region today, on the southwestern fringe of a broad upper trough centered over the Great Lakes. Mid-level isentropic lift to our west is bringing clouds and some showers and storms to the high Plains. A lot of the mid cloudiness over our area has dissipated since sunrise, likely due to increasing isentropic descent on the lower Plains. With more insolation expected, highs should climb to the warmer numbers the guidance has suggested.
1238 PM CDT Sun Jun 25 2017 An amplified upper air pattern featuring a broad longwave trough covering the eastern two-thirds of the CONUS will guarantee northwest flow aloft and cooler than normal temperatures through the early part of the work week.
It's been yet another gorgeous day across the Northern Rockies with temperatures running 5 to 10 degrees warmer than yesterday. For the past several days weather models have consistently honed in on an area of monsoonal moisture that was residing over northern Mexico and forecast to drift northwest around the high pressure ridge. All models bring this moisture into Idaho and Montana in sync with a rather robust mid-level disturbance associated with a weak upper level low pressure system presently near 34N/133W.
Latest visible satellite imagery shows mostly clear to partly cloudy skies with convective development ongoing across the higher terrain especially near the Santa Rita and Chiricahua mountains. As the afternoon progresses, expect the convection to move off the higher terrain primarily into the valleys of Santa Cruz, Cochise, Graham and Greenlee Counties with gusty winds being the main threat. However, with the slightly cooler temperatures, drier air will make its way into just about the entire forecast area.
Chattanooga Airport, TN 61 83 62 82 / 0 0 10 20 Knoxville McGhee Tyson Airport, TN 59 80 59 79 / 0 0 10 20 Oak Ridge, TN 58 80 58 81 / 0 0 10 20 Tri Cities Airport, TN 54 77 54 76 / 0 10 10 20.
326 PM MDT Sun Jun 25 2017 Northwesterly flow aloft continues as an upper ridge is over the desert southwest and a broad trough is over the Great Lakes area. Shouldn't be very strong or last very long with the upper ridge continuing to push in and the loss of the suns heat. The upper ridge axis will push into the state Monday for warmer and drier conditions area wide as the surface upslope flow will weaken. Isolated showers/weak storms are still possible mainly over the higher terrain south of I70, and perhaps over the far eastern plains where CAPE is progged to be in the 1500-2000 J/kg and marginal shear.
235 PM EDT Sun Jun 25 2017 Dewpoints have dropped into the 40s across much of the area, and will little cloud cover many spots will see lows cooler tonight than last night. A weak dissipating cold front will move into the area tonight but not have any real impact on the local weather. An approaching mid level short wave trough and associated cold front will bring an increase in cloudiness along with a chance of showers, mainly well after midnight.
Given latest trends, believe best chance of precip over the fcst area will be over the far eastern plains and along the CO/NM border, and this is where I painted the highest pops for this morning. Max temps today over the plains should be about 2-4F warmer than yesterdays highs. Any precip over the higher terrain (w of the s mtns) will be isolated. The highest potential for strong to marginally severe thunderstorms as well as cells containing locally heavy rain should noted along and near the I-25 corridor from Monday into Monday night(which matches well with the Storm Prediction Center's latest Day 2 Severe Outlook).
Primary surface cold front extends across sern TX from srn LA into nrn Mexico. Some MVFR cigs may develop again overnight tonight, but these were left SCT in the taf as confidence is on the low side for now.
229 PM MDT Sun Jun 25 2017 Upper level high pressure ridging over the region will bring hot and dry conditions to the region Monday.
Slightly cooler and drier air will only be noted across Central Louisiana, where overnight lows will dip into the upper 60s.
652 PM EDT Sun Jun 25 2017 A cold front weakens offshore of the southeast coast through Monday. as high pressure builds over the region. stronger cold front will cross the area Monday afternoon and night. bringing cooler and drier weather through midweek.
Tomorrow the forcing becomes stronger as remnants of an upper low moves towards Northern California, providing ample diffluence at the left exit region of a 60kt jet.
320 PM EDT Sun Jun 25 2017 A cold front will push southeastward through central North Carolina, weakening as it pushes to the coast later today.
557 PM CDT Sun Jun 25 2017 Sunshine and northerly winds led to a mild afternoon under Canadian high pressure.
201 PM EDT Sun Jun 25 2017 A slow moving cold front will stall along the coast tonight while high pressure builds in from the northwest. Cooler and drier air with lower humidity is expected through mid week. Dewpoints will lower from the lower 70s this evening to lower 60s by Monday morning.
Temps this afternoon have been slightly warmer than yesterday with the higher temps in the west today and cooler on the eastern side of the CWA due to clouds hanging on longer there.
546 PM EDT Sun Jun 25 2017 A slow moving cold front will stall along the coast tonight while high pressure builds in from the northwest. Cooler and drier air with lower humidity is expected through mid week. An upper level trough will continue over the eastern CONUS. An upper level disturbance moving through the base of the trough combined with slow moving frontal boundary will continue showers and thunderstorms from the eastern Midlands to the coast early this evening. Have forecasted overnight lows from the mid 60s north and west to the lower 70s southeast.
412 PM CDT Sun Jun 25 2017 Drier air from a cold front is across most of the area today as it slowly cross the central Gulf Coast.
204 PM EDT Sun Jun 25 2017 Upper low pressure will maintain cooler temperature and a periodic shower chance for the first half of the week. This should allow temperatures to fall off rapidly with the lower dewpoints in place, resulting in low temperatures well below normal. Fries Mean troughing will remain across the area through the short term period. Fries The pattern rapidly evolves to favor flat ridging moving toward the Appalachians by the latter half of the work week. However, the lack of deepening of the system that shifts toward the upper Mississippi Valley combined with a fairly weak subtropical ridge off the southeastern U. coast will mean moisture advection should occur fairly readily over the flat ridge. As such, while a short period mid-week looks dry, humidity and thunderstorm chances should return with warmer air later in the week.
High pressure centered over southwest Kentucky will drift east while a secondary front is slated to pass through later this afternoon and evening. This puts minimum RH values into the low 30s. Finally, bumped up highs a couple degrees in the typical warmer areas, putting most locations 80-83 degrees. Surface analysis reveals broad area of Canadian high pressure beginning to nose its way down into the northern Plains, with its influence being felt across much of the central and eastern CONUS. Another surge of invigorating, crisp Canadian air will keep temperatures even cooler for Monday, with afternoon highs only reaching the mid to upper 70s for many locations.
Low level ridge axis will drift a little southward into tonight as weak surface boundary sags toward the northern peninsula. low level ridge axis sliding east over the Atlantic with weak southwest flow surface through steering levels allowing sea breezes to form and push inland from both coasts. Some weakening of the ridge aloft with slight cooling at the mid levels also allowing the area PoPs to rise.
251 PM MDT Sun Jun 25 2017 Northwest flow continues across the northern Plains today as an upper ridge builds in from the western CONUS. Temps Monday will be slightly warmer than today with dry conditions continuing.
317 PM CDT Sun Jun 25 2017 Broad high pressure again was positioned from the northern plains through the southern plains this afternoon. The rain cooled air behind this activity, already in the 50s will lead to even cooler temperatures for much of the area heading into the evening, mainly over the northern counties. Models show the the low clouds slow to break up early Monday. The cool period of the weekend and early part of the workweek will come to an end as a broad upper ridge followed by zonal upper flow and southwest downslope boundary layer air.
128 PM MDT Sun Jun 25 2017 Have decreased pops this afternoon over most of the urban corridor with the low stratus slow to burn off, keeping the cap in place, as shown on ACARS soundings. CIRA Simulated WRF satellite showed this nicely, with it keeping the low stratus through about noon before breaking up. May need to adjust the high forecast temperatures for today - depending on how long the clouds hang around. The lower airmass will remain on the moist side while the northwest flow aloft will bring dry air at the mid and upper levels. Temperatures slightly warmer and a slight increase in moisture will improve instability today. Upper level high pressure building over the Rocky Mountain Region will bring mostly dry and warmer weather to north central and northeastern Colorado on Monday.
400 PM EDT Sun Jun 25 2017 A cold front weakens offshore of the southeast coast through Monday. as high pressure builds over the region. stronger cold front will cross the area Monday afternoon and night. bringing cooler and drier weather through midweek.
541 PM EDT Sun Jun 25 2017 A long wave trough over the the Great Lakes and eastern Canada will keep it slightly cooler than normal through the first part of the week.
The relatively cool and dry conditions will continue into Monday, as the broad longwave trough slowly edges eastward across the Midwest. ridge flattens into a zonal flow.
422 PM EDT Sun Jun 25 2017 Aviation sections updated An upper level trough and weak cold front moving through the region may spark a few showers and isolated thunderstorms Monday into Monday evening.
These showers are generally co-located with the axis of an upper level trough. The high temperature and hourly temperature grids for today were also adjusted to reflect these trends. Broad upper ridge help keep pattern in place thru mid week, confining any low pops to southern portions of area. Strong short waves movg across upper midwest later in week will serve to break down upper ridge and pops will increase as cooling aloft steepens lapse rates, and increased upper ridging over se states helps pump gulf moisture back into region.
339 PM EDT Sun Jun 25 2017 A long wave trough over the the Great Lakes and eastern Canada will keep it slightly cooler than normal through the first part of the week.
An upper level trough and weak cold front moving through the region may spark a few showers and isolated thunderstorms Monday into Monday evening.
200 PM CDT Sun Jun 25 2017 With high pressure in control, below normal temperatures and humidity levels continue.
Clear sky overnight and lights will allow temps to drop into the low-mid 40s all areas. Monday will see a few CU with daytime heating, esp east of the Red River where convective temps are the lowest.
150 PM EDT Sun Jun 25 2017 A long wave trough over the the Great Lakes and eastern Canada will keep it slightly cooler than normal through the first part of the week.
This has led to some over-forecasting of precipitation for the western half, especially from the models attempting to develop an unstable NW flow pattern with storms forming over the high plains and moving south.
/issued 352 AM CDT Sun Jun 25 2017/ (Today and Tonight) An upper level ridge will remain centered over the Desert Southwest today and tonight, keeping West Central Texas in northwest flow aloft.
405 AM CDT Thu Mar 22 2018 Nice spring weather is expected to continue today and Friday as high pressure over the region moves east and induces a veering of winds to a more easterly flow by tonight then southerly flow Friday.