Aikyam-Lab/Synoptic-Bench huggingface dataset:
There will be an increase in mid level clouds overnight across north Alabama as lift increases ahead of an upstream short wave trof. Isolated showers could develop farther south on Saturday as the main trof axis encounters higher low level moisture across east Alabama.
425 AM EDT Fri Oct 14 2016 High pressure will build from the eastern Great Lakes eastward to just off the New England coast today through Saturday.
1241 AM CDT Fri Oct 14 2016 Lowered overnight lows a couple of degrees around Mobridge and Aberdeen. On Friday, much of the low level thermal progs available indicate it could get quite toasty across portions of central and south central South Dakota, with the potential to mix out some rather dry air during the afternoon hours. At this point, it looks like the slow moving cold front will be over our central CWA around 09Z Saturday, and just to our east by 18Z.
245 AM PDT Fri Oct 14 2016 Morning marine based stratus clouds will linger through late morning today near the coast, otherwise it will be slightly cooler today as high pressure weakens.
Low-level trough axis is over the Rockies area, producing some breezy southerly winds across the CWA. Southwesterly winds will increase today as trough crosses the region, bringing in warm and dry air. Clouds will increase throughout the day as trough passes through, and winds will shift to the northwest with a cool front this evening. Significantly cooler yet still near to above average temperatures are expected for Saturday, with cool high pressure overhead. Another low-level trough will approach the region overnight.
326 AM EDT Fri Oct 14 2016 High pressure should maintain dry weather through Saturday.
354 AM EDT FRI OCT 14 2016 A dry cold front will drop south of the area this morning. Canadian high pressure will follow and extend across the eastern U. The main cold front was located from eastern Tennesse NE across central Virginia at mid-evening. The milder lows of the warmer models appear most likely given the mixing of the boundary layer with the cold frontal passage, then the increase in cloudiness later tonight.
415 AM CDT Fri Oct 14 2016 The upper trough over west Texas will move toward the east coast and slow as upper ridging builds over the east coast.
41 A ridge of high pressure will continue to dominate the weather pattern even with a very weak cold front moving into N GA Tonight. The ridge is weaken a bit today but a reinforcing ridge will build into the area from the eastern great lake states through Sat. The frontal system just weakens as the ridge just build right over it and keep the main area of moisture north of our area through the short term.
402 AM EDT Fri Oct 14 2016 Cool yet mostly clear conditions can be expected today through tonight as high pressure takes over the region. Warmer air will return over the weekend.
331 AM CDT FRI OCT 14 2016 High pressure centered just to our east this morning will continue to drift slowly away from central Illinois today. As the high shifts well off to our east today, southerly flow will bring warmer air back into the area this afternoon with highs expected to push back to between 65 and 70 degrees. A band of lower clouds currently across Kansas into western Missouri will stream northward and remain west of our area today, but should gradually shift east into central Illinois overnight which will result in much warmer readings overnight as the mercury settles into the low to mid 50s accompanied by a gentle southerly breeze.
317 AM CDT Fri Oct 14 2016 Zonal to southwest flow aloft will lead to warmer temperatures today, while an increase in moisture will bring the potential for fog and drizzle heading into tonight. The low clouds mix out and shift east of our area for the day time hours and southerly winds will be on the increase as the surface gradient tightens. The low amplitude character of the flow will result in fast-moving systems with little or no time to entrain any decent moisture. As this low tracks across the Dakota's.
Zonal flow aloft and ridging at the surface will prevail locally today.
500mb ridge across northwest Mexico will build eastward across northern Mexico into southwest TX tonight into Saturday in the wake of the upper level trough moving eastward across east TX tonight into the southeast United States Saturday. An onshore flow will prevail across the lower TX coast today through Saturday but subsidence will keep a lid on convection developing across the area tonight into Saturday.
528 AM EDT Fri Oct 14 2016 High pressure should maintain dry weather through Saturday.
333 AM EDT Fri Oct 14 2016 High pressure centered over the local area will shift to New England today. The high will continue to influence the area into Saturday.
131 AM EDT Fri Oct 14 2016 High pressure will build across the region tonight providing dry weather and cooler temperatures. Patchy frost will develop by morning across some of the cooler locations. High level clouds increase from the south late, but expect that this late timing and the fact that the clouds will be thin, will enable frost formation in ILN/s cooler ne counties. Highs will be close to normal, ranging from the lower 60s ne to the upper 60s sw. Clouds will keep temperatures up Friday night, with lows from near 40 northeast to the lower 50s southwest. Temperatures will be above normal ranging from the lower 70s north to the middle 70s south.
Strong high pressure over the region will keep dry conditions in place through the next several days. Flat ridging over the region will keep skies mainly clear through the period, with a very dry airmass allowing, at most, some cirrus clouds to move across the region from time-to-time.
WV imagery this morning depicts an upper low just off the Washington coast with dry air just beginning to push inland along a jet core of 150kts. The second wave will lift around the parent upper low from about 40N and reach the Pac NW Saturday night.
208 AM EDT Fri Oct 14 2016 Cool yet mostly clear conditions can be expected today through tonight as high pressure takes over the region. Warmer air will return over the weekend.
429 AM CDT FRI OCT 14 2016 Axis of a positive tilt trough had cleared all but our far southeast counties before daybreak. Brunt of scattered to numerous storms ahead of this trough have been poised along and just north of I-20 for much of the pre-dawn hours. Trend is for this activity to remain outside of our CWA, but will keep an isolated shower mention in our low Rolling Plains until the trough exits by mid/late morning. Despite subsidence and drying aloft behind the trough axis, a widespread stratus shield will hold strong for most of the morning. Height rises and breezy SW winds ahead of lee troughing in NM don't look to offer much additional warming thanks to moist boundary layer winds ahead of the trough.
/issued 247 PM CDT Thu Oct 13 2016/ SHORT TERM (Tonight through Friday Night): Current trends will persist, with high pressure continuing to extend from the Southeast United Sates across the Northwest Gulf and into the local area, and with a broad H5 ridge pattern aloft.
236 AM EDT Fri Oct 14 2016 High pressure will build back into the region overnight and Friday.
645 AM EDT Fri Oct 14 2016 High pressure centered over the local area will shift to New England today. The high will continue to influence the area into Saturday.
1240 AM EST Wed Dec 7 2016 Dry high pressure will briefly build across the forecast area for Wednesday.
448 AM EST Wed Dec 7 2016 A strong low pressure system over southwest Ontario will move slowly east across southeast Canada over the next couple of days causing cold conditions across our area.
For 06z Aviation discussion below Clouds, blustery winds and occasional flurries will be the norm over the next 24 hours as a deep cyclone slowly lifts east-northeast of the area. The center of the low pressure responsible for the change in weather today is located near the US/Canadian border just to the west of International Falls. The low will slowly slide to the east- northeast tonight and by sunrise tomorrow, the system will be just north of Lake Superior.
320 AM EST Wed Dec 7 2016 Weak high pressure will settle over the Carolinas today.
A cold front will move through the area tonight and Wednesday bringing breezy conditions to the Colorado River Valley and cooler temperatures area wide. North winds associated with the cold front pushing down through southern Nevada will be a little slower to spread over Clark County and points to the south. A cold front pushing down through southern Nevada andsurrounding areas will bring north winds 10-20 knots to the regionovernight.
A trailing upper trough from the occlusion will then approach late tonight with perhaps a few flurries.
405 AM EST Wed Dec 7 2016 Weak high pressure visits today.
Although some areas will continue to have light winds below 10 mph as high pressure settles in, will maintain the wind chill advisory to advertise the cold.
Quiet night expected across the region as high pressure filters into the northern part of the forecast area. Some slight clearing along with north winds pulling cooler air into the region will allow for low temperatures to fall to near average early December averages.
1254 AM EST Wed Dec 7 2016 A low pressure system will exit the area tonight. High pressure will work into the area for Wednesday.
1144 PM CST Tue Dec 6 2016 Cold high pressure was located over the central plains this afternoon with low pressure over northern Minnesota.
244 AM EST Wed Dec 7 2016 A weak trough will move across the region today.
346 AM EST Wed Dec 7 2016 Low pressure north of the great lakes region will move northeast through tonight.
307 AM EST Wed Dec 7 2016 The latest surface map features a cold front aligned from the eastern Great Lakes down across the central and southern Appalachians. Aloft, a broad and deep trough is in place across the western two thirds of the CONUS, with an upper level low churning across southern Ontario, and a short wave trough moving east across the central Rockies. The models are in good agreement through the short term, with the upper level low continuing to move east into Quebec.
1241 AM EST Wed Dec 7 2016 A strong low pressure system over southwest Ontario will move slowly east across southeast Canada over the next couple of days causing cold conditions across our area.
/22/ Quiet night expected across the region as high pressure filters into the northern part of the forecast area. Some slight clearing along with north winds pulling cooler air into the region will allow for low temperatures to fall to near average early December averages.
344 AM EST Wed Dec 7 2016 High pressure provides dry weather today.
839 PM PST Tue Dec 6 2016 Gusty onshore winds over the mountains and deserts this evening will weaken late tonight as low pressure moves east over the Rockies.
324 AM CST Wed Dec 7 2016 Flow aloft remains rather quick in longwave troughing with deep upper low over southwestern Ontario and another weaker wave making its way east into Wyoming and Colorado early this morning.
345 AM EST Wed Dec 7 2016 High pressure builds into the area today.
340 AM CST Wed Dec 7 2016 The southern edge of the stratus associated with the upper low over southern Ontario continues to remain near our area this morning. NAM model soundings struggle to erode the low-level moist layer, and even if any clearing of the lower clouds occurs, mid-level cloud cover is spreading northeastward into NE IA and SW WI, so once again expect most areas to remain on the cloudy side with some flurries possible under lower cloud cover today.
At most would expect a brief period of very light snow which could lead to some very light accumulations over parts of northeast OK and northwest AR, but precip could well be limited to flurries or freezing drizzle in many areas.
332 AM EST Wed Dec 7 2016 Dry high pressure will briefly build across the forecast area today.
Reinforcing cold front is currently making its way ewd through the mid TN Valley, although the brunt of the colder air behind the sfc boundary is still displaced more across the Midwest region. The front has allowed a little bit of mixing in the lower levels to break up some of the very low ceilings in place across much of the area. A mostly cloudy and somewhat cooler trend is expected for the mid week as the first surge of cooler air filters in from the northwest.
104 AM EST Wed Dec 7 2016 After system departs overnight, high pressure will build for Wednesday.
1134 PM CST Tue Dec 6 2016 Cold front moving across the area will push the low cloudiness out of the area.
There could be a few slick spots across SE NM and the northwest Permian Basin where temperatures are near freezing. Thick high clouds will keep it from getting any warmer.
1245 AM EST Wed Dec 7 2016 Low pressure will move away from the Middle Atlantic coast tonight. Weak high pressure will follow and settle over the Carolinas through Wed night. An arctic cold frontal passage will occur on Thu. The lows tonight will bottom out in the upper 30s to low 40s.
345 AM CST Wed Dec 7 2016 High pressure ridge sitting across southern IL will keep the surface winds across the CWA out of the west to northwest next 24hrs. In the upper levels, a weak trough will move toward the area today, reaching the CWA overnight. Most of the central and southeast parts of the CWA will see temps above freezing, while the northern areas, including Galesburg, Peoria, and Bloomington will be below freezing. The location of the high pressure ridge will allow much colder temps to advect into the area for tonight. So, expecting lows ranging from around 15 in the northwest to the lower 20s in the southeast.
Lift with this system will be strong, but moisture will be lacking in the low to mid levels of the atmosphere.
An upper trough continues to sag south into Utah this evening with 700mb cold advection occurring over northern Utah. Daytime temperatures are not expected to rebound much tomorrow as most valleys outside of far southern Utah are expected to remain below freezing and well below climatological normals.
Temps still expected generally remain in the 50s with a few upper 40s in cooler locations. Fog not expected to be as widespread across SE GA as some of the lower stratus from upstream slides into the region.
1259 AM EST Wed Dec 7 2016 A complex area of low pressure moves off the Mid Atlantic coast tonight with high pressure building in from the west Wednesday.
452 AM EST Wed Dec 7 2016 A broken line of weak showers ahead of a weak cold front over the southeastern Gulf of Mexico Tuesday evening intensified as it migrated eastward across the Florida Keys and adjoining coastal waters overnight. The cold front just north and northwest of the service area will stall as both upper forcing diminishes and supporting gradient flow collapses.
A weak cold front has passed through Central AL this morning, providing slightly cooler northerly flow to start off the day. Even though the mid and upper levels are dry, the lower levels are still saturated.
357 AM EST Wed Dec 7 2016 As upper level low pressure moves east across Ontario and Quebec, cooler and drier air will continue to move into the Ohio Valley today, with temperatures continuing to get colder through the end of the week.
The deep upper low over Minnesota/Quebec along with the accompanying expansive polar jet is responsible for pushing the Arctic front towards the Southeast over the next 24 hours. Some breaking in the clouds is possible over northeast AL/N GA area before the Arctic cold front approaches for tonight. Then, as the cold front approaches northeast to north winds will increase and gradually back to the northwest with frontal passage between 04Z-06Z (10PM-1AM) tonight. Not much saturation is present for long in the low-levels, but may still see some light rain prior to the frontal passage this evening.
In addition, the lower column remains quite dry with some t/td depressions exceeding 15-20 degrees during the predawn hours.
Scattered showers are expected to develop across the area after 08/00z as a cold front moves across the area.
205 AM EST Wed Dec 7 2016 Low pressure will move away from the Middle Atlantic coast tonight. Weak high pressure will follow and settle over the Carolinas through Wed night. An arctic cold frontal passage will occur on Thu. The lows tonight will bottom out in the upper 30s to low 40s.
A long wave trough migrates slowly east across the North Central states today through tonight with a couple weak shorter wavelength features ripping across the central and eastern portion of the nation. The first is building east into toward the Ohio Valley with a broken ac/ci deck with the second shifting east across the the Lower Mississippi Valley into the Southeastern U. The low level layer is being lifted on the Cumberland Plateau and along the Smoky Mountains with some downsloping generating breaks in the Great Valley.
/issued 955 PM CST Tue Dec 6 2016/ Temperatures were adjusted slightly this evening toward cooler more quickly, but forecast minimum temperatures appear reasonable. The cold front is still expected to move north to south through Oklahoma Wednesday afternoon, so a mid-day high temperature for central Oklahoma is most likely.
Most of the lower clouds should build in from the south.
327 AM CST Wed Dec 7 2016 Broad upper trough will dominate as we go through the remainder of the work week and into the weekend. Surface wave down along Gulf Coast will try and wave up tonight in response to short wave energy racing through upper trough but don't think it will be enough to crank up precip this far north but there is enough vorticity rounding base of upper trough tonight in tight geostropic flow to warrant at least a meniton of a 15 percent pop for a sprinkle or flurry or two in the overnight.
Winds later Wednesday will increase to the north to northwest at 5 to 15 mph with some gusts as the cold high pressure builds into AR.
330 AM CST Wed Dec 7 2016 A deep upper level low currently over the MN/Ontario border is forecast to continue to track northeast while upstream, a broad upper level trough over the intermountain west and northern Rockies is forecast to dig into the nation's mid-section. The northern edge will quickly be eroded as dry high pressure builds southeast.
Can not rule out a local 3 inches on the high end somewhere over our southern zones in a localized heavier band. Temperatures will be cold, highs will struggle to get into the low to mid 20s during the afternoon.
941 PM EDT SAT JUL 2 2016 Warm front brings chances of showers Sunday.
726 PM EDT SAT JUL 2 2016 Warm front brings chances of showers Sunday.
638 PM CDT SAT JUL 2 2016 Weak high pressure will dominate tonight with widespread VFR conditions expected.
1056 PM CDT SAT JUL 2 2016 We remain parked on the backside of a high pressure area, centered over the great lakes. Very little progression of the high tomorrow will mean tomorrow will be similar to today.
The cold front should be hanging out around the southern Texas Panhandle during the pre-dawn hours, so this may provide a focus for the rain. But think the best chance of rain may develop near the DHT and GUY TAF sites after midnight in association with a cold front. first behind a trough and then behind the cold front. In addition, a weak cold front will move across the TX and OK Panhandles tonight and could serve as an additional low level lifting mechanism to assist in tstm development.
Temperatures will be slightly lower behind a weak cold front. At 02Z weak cold front extended from western Montana through southwestern Idaho with a wide band of middle and high clouds consisting of scattered altocumulus and broken to overcast cirrus.
649 PM CDT SAT JUL 2 2016 Widespread light to moderate rain continues through the afternoon and evening hours as strong isentropic lift ahead of the incoming mid level trough. This focus for low level ascent remaining so far south with a good low level jet around 30 to 40 kts transporting plenty of moisture north and over the cooler air should help keep widespread rain with some embedded thunderstorms going through the overnight hours.
The lower-res synoptic/global mdls suggest a further nwd soln, across the nrn third of the CWA, while most of the CAMs suggest a further swd soln. As the main upper level low approaches late tonight, precip shud gradually lift nwd in response.
936 PM EDT SAT JUL 2 2016 High pressure will build south of the region through tonight and will shift offshore on Sunday. Also made a few adjustments to wind speeds overnight to show valley locations dropping to near calm while eastern areas hang on to the higher speeds for longer. Cool cyclonic flow aloft associated with a deep upper level low will continue tonight as a dry and cool canadian air mass moves in at the surface. A few spots like sheltered mountain valleys well inland may dip into the lower 40s.
Mid evening temperatures so far have cooled into the mid 70s to mid 80s (mostly in the lower 80s) with a north to northeast winds 5-10 mph. A stationary frontal boundary was draped south of the region, pushed southward by weak high pressure sliding eastward across the southern Great Lakes. (Issued 431 PM CDT SAT JUL 2 2016) A fairly stationary cold front extends from Maryland west northwest into Iowa into northern Nebraska. Dewpoints have really mixed out this afternoon to around 50 degrees and into the lower 60s. Thus lowered tonights lows into the lower to mid 60s primarily in northeastern AL and near Southern Middle Tennessee. More moisture will advect in at the lowest levels by Sunday afternoon/evening, however not sure how much this will occur between 700 mb and 500 mb based on forecast flow upstream.
Moisture levels are still high but as weak upper level trof moves into Central plains weak subsidence will be over the area through tonight. The west side of an area of rain showers extending from near limon to Sedgwick marks the axis of a weak upper level trough that has been moving across the region. In addition, scattered showers and tstms developing over the higher terrain will start to move across the Urban Corridor and adjacent plains. an upper level ridge and mid level subsidence will allow for warmer airmass to move over the region. Best coverage will be over the higher terrain with isolated coverage across the plains in the aftn.
Lows will be in the low to mid 70s. Heading through the remainder of the holiday weekend, Sunday is expected to be quite similar to today with rather hot conditions and perhaps an isolated shower or two as the mid level ridge begins to slip temporarily eastward.
832 PM CDT SAT JUL 2 2016 All the low clouds/boundary layer moisture over Nebraska and south central South Dakota are progged to advect their way northward into this cwa later tonight/early Sunday morning, either in the form of additional low clouds or areas of fog /probably a combination of both/. Dropped lows a few degrees from previous forecast, more towards the cooler end of guidance which is what we have been seeing the past few mornings. With 925/850 mb temps warming a couple more degrees on Sunday, and with better mixing, expect highs to be a few degrees warmer than today.
815 PM CDT SAT JUL 2 2016 We remain parked on the backside of a high pressure area, centered over the great lakes. Very little progression of the high tomorrow will mean tomorrow will be similar to today.
No additional heavy rain or strong outflow winds are anticipated as upper low begins to pull away and heating subsides. /Issued 153 PM PDT SAT JUL 2 2016/ An upper low will continue to bring the threat for thunderstorms mainly south of Highway 50 today, before drier conditions return for the remainder of the holiday weekend. Upper levels will warm while the low levels slightly cool stabilizing the airmass.
For that reason will keep the low pcpn chances across the north overnight.
910 PM EDT SAT JUL 2 2016 A cold front will move east of the region tonight.
1211 AM EDT SUN JUL 3 2016 A cold front will move east of the region overnight.