Aikyam-Lab/Synoptic-Bench huggingface dataset:
330 AM PST Tue Nov 29 2016 Dry weather with locally breezy north wind returns this week as high pressure builds along the West Coast. High pressure is building over the region and north/northeast winds have precluded fog development. Despite the winds, temperatures are running cooler across most of the area compared to 24 hours ago and generally range from the 20s and 30s in the mountains to the 40s to lower 50s elsewhere. Dry weather with temperatures close to average will be the general rule this week as high pressure dominates.
Models have been trending away from the potential for additional showers today, limiting them to the higher terrain and decreasing by this evening as drier air moves overhead.
930 AM EST Tue Nov 29 2016 A rather warm day on tap as some ridging continues aloft with southeast to south low level flow around high pressure over the western Atlantic. Temperatures will warm into the lower to mid 80s away from the coast, while close to the coast the winds shifting to a more south to southwest will keep readings mainly in the mid 70s to near 80.
Yesterday, a combination of morning rainfall (keeping temperatures cooler) and a lack of that northward dew point push kept us from having any widespread severe weather as that line pushed through the mid-state yesterday evening. Again, the NAM is the most aggressive with the low-level helicity this evening. Curved hodographs in the lowest 3 km of the atmosphere would suggest a tornado potential.
/Issued 359 AM CST Tue Nov 29 2016/ Early morning water vapor imagery shows large upper low pressure center now across the upper Midwest. Surface cold front/wind shift extends from Wichita to near Gage. as cold front moves east across the area this afternoon.
Winds will gradually veer to the west and northwest by late today and diminish as a cold front approaches Deep South Texas. The cold front is expected to move across the area late tonight with some light fog and low ceilings possible at BRO and HRL after 06z Wednesday. A cold front will move through Deep South Texas and the Rio Grande Valley during the pre- dawn hours of Wednesday, producing isolated to scattered showers and thunderstorms for most of Deep South Texas.
421 AM CST Tue Nov 29 2016 Satellite imagery showers broad upper level trough centered over the Dakotas, with cold air in place as far as the west side of the Rockies down to the OK/TX Panhandles and along the Mississippi Valley. This would require significant precipitation aloft to get the evaporative cooling down to the surface, and model soundings just don't show moisture making down to the lower levels. Winds will shift out of the north this afternoon 10 to 20 mph as the colder air with the trough digs further south. By Wednesday evening the upper level low will pull over the Great Lakes and a more zonal but still cool flow will take place over the southern CONUS.
Low clouds in the wake of a cold frontal passage yesterday are still plagueing the eastern half of the San Joaquin Valley, adjacent foothills and the north facing slopes of the Tehachapi mountains early this morning where drizzle and fog will likely continue through the morning commute period. In the larger picture, a short wave ridge of high pressure aloft will build over central California today. As the ridge axis moves inland over the CWA tonight, clear skies and nearly calm winds will lead to fog development in the San Joaquin Valley. A weak short wave trough will traverse the northern part of the state Wednesday afternoon then exit into the Great Basin Wednesday night.
616 AM CST Tue Nov 29 2016 A big upper level low centered over the eastern Dakotas will slowly shift off to the east over the next couple of days. As sfc cold front still off to our west will finally move through the cwfa today shifting ssw winds to the west. The lower levels have already dried out quite a bit, so other than some extensive mid/high level clouds early today, the frontal passage will be fairly benign. Cloud cover circulating around the upper low will affect the northern cwfa more versus the south. A ridge of high pressure is then expected to build in for Thu with more abundant sunshine. The general model forecast guidance has been consistent in digging a strong upper low into northern Mexico by Sat.
1031 PM PDT Thu Sep 22 2016 High pressure will gradually build over the region through the weekend resulting in a warming trend.
219 AM MDT FRI SEP 23 2016 The current IR satellite image is showing a band of cold cloud tops associated with a cold front passing just east of the Utah Colorado border this morning. So far the cold front has been producing rain rates of 0. The current satellite water vapor image is showing the cold front's parent low centered over Southeastern Nevada.
An amplified pattern will prevail with a prominent mid/upper level ridge from the se CONUS through central Canada by this weekend and a trough moving from the Rockies through the nrn plains. Although the models were in agreement with the development of a cutoff low by there were large differences and run to run variations with the evolution and position of the low.
347 AM CDT FRI SEP 23 2016 Expect dry weather today and tonight as an upper ridge remains Missouri and Illinois.
154 AM MDT FRI SEP 23 2016 General clearing will continue this afternoon along the western fringes of an area of retreating high pressure. A large upper low will approach the CWA overnight and into Friday. For Friday, we will see temperatures soar once more into the upper 80s to near 90 degrees with a sharp drop toward the afternoon as much cooler air is advected into the region.
Scattered showers/storms continue this morning over Flagler county and the coastal waters as a vorticity lobe rotates around upper low to the north. Additional isolated showers/storms possible this afternoon mainly near the east coast as upper low shifts sw into s Ga.
The large upper level low pressure trough over the southwest U.
416 AM CDT FRI SEP 23 2016 A warm front will continue to lift northward into the Dakotas today, with one more summer-like afternoon anticipated across the region. expect an area of low pressure to deepen on the lee side of the Rockies. expect the warm front to our north to begin to transition and track southeastward towards the local area as a cold front.
325 AM EDT Fri Sep 23 2016 Mainly dry conditions are expected to persist today through this weekend as an upper level ridge builds in. Temperatures will remain above normal, but trend a little cooler this weekend behind a weak front.
low pressure was close to the South Carolina Grand Strand with a continued risk for a few back-side showers mainly across the Charleston Tri-County area. This will also permit minimum temperatures to drop below values currently prognosed for the same areas, which by the way are anticipated to be in the low 70s most locations.
A warm front will continue to lift northward into the Dakotas today, with one more summer-like afternoon anticipated across the region. expect an area of low pressure to deepen on the lee side of the Rockies. expect the warm front to our north to begin to transition and track southeastward towards the local area as a cold front.
313 AM CDT FRI SEP 23 2016 A warm front was lifting through the forecast area early this morning, with all convection north of the region.
At the present time a surface warm front is located just to the south of our CWA. Tonight looks mostly clear during the early part of the night, with the exception of the Buffalo Ridge area where low level moisture may linger.
Persistence will be followed through the short term as high pressure at the surface will continue to sit over the Ohio Valley and Central Appalachian region, extending south across the TN Valley. The mid-to-upper ridge centered over the MS Valley will also remain nearly stationary today, and continue to provide a dry northerly flow that keeps clouds over NC to our east.
It seems unlikely to swell further, with a weak cap in place and not impressive dynamics, though temperatures climbing into the lower 90s could turn one or two pin-point showers loose over the next couple hours. Friday will see a northward surge of mid and upper level moisture from an inverted trough over northern Mexico and a re-tightening of the upper shear axis.
451 AM CDT Fri Sep 23 2016 Mid-upper level ridging over the northern areas this morning with moist low level flow from the Gulf across the southwestern area and on into the Hill Country. The low level flow will drag in greater moisture today and by mid morning expect scattered showers and isolated thunderstorms to have spread well inland.
634 AM EDT Fri Sep 23 2016 High pressure will remain across the region through today. A weak cold front will push south into the area tonight.
The cut-off low pressure system sitting over Utah and southern Idaho will continue to spread moisture, in terms of clouds and light rain over the Northern Rockies.
320 AM CDT Fri Sep 23 2016 Upper level high amplitude ridge is currently situated over the Central States with an upper low over Nevada and an associated long wave trough digging into the Great Basin region out west. high pressure dominates the southeastern quarter of the U.
1122 PM MDT THU SEP 22 2016 General clearing will continue this afternoon along the western fringes of an area of retreating high pressure. A large upper low will approach the CWA overnight and into Friday. For Friday, we will see temperatures soar once more into the upper 80s to near 90 degrees with a sharp drop toward the afternoon as much cooler air is advected into the region.
Looking aloft, the global models depict the upper low over northwest Nevada Thursday afternoon and track this feature east then northeast toward the northern plains on Friday. This low will be the focus for showers and scattered thunderstorms across the region Friday into the weekend. Lows tonight will be in the mid 40s to lower 50s and the highs Friday will be mid 50s to mid 60s.
109 AM EDT Fri Sep 23 2016 High pressure will remain across the region through Friday.
Upper low centered over Utah and Nevada making slow progress toward the east. Area starts to see some mid level cooling as the trof approaches, which should shave a few degrees off high temperatures for today with highs in the upper 80s. Southerly surface winds pick up a little speed by the afternoon hours, with north central Kansas in the 15-20mph range with 10-15 east, which may also make it feel just a bit cooler.
This, combined with a warmer start will keep the valleys from getting as cool as previous nights. Temperatures are running a few degrees warmer compared to last night at this time. The forecast is on track and merely fine-tuned some of the low temperatures and diurnal drop off over the next few hours. Models remain consistent with the idea of a strong upper level ridge of high pressure maintaining dry weather with unseasonably warm daytime temperatures through the upcoming weekend.
420 AM MDT Fri Sep 23 2016 08z surface analysis had low pressure over northern CO and southwest WY with developing warm front into eastern NE. Water vapour showed upper low over eastern NV, which is the main forecast concern this morning. This afternoon and this evening, dynamic evolution of aforementioned upper low expected. With temperatures ranging from the lower 60s over northwest SD to the upper 80s over south central SD across front boundary, forecast uncertainty is high.
240 AM MDT FRI SEP 23 2016 A strong upper low is in place over Nevada/Utah border, with SW flow ahead of this feature across the Central Rockies and High Plains. Today-Tonight: Forcing will increase this afternoon as upper low transitions eastward and upper level jet streak moves over western KS.
102 AM CDT FRI SEP 23 2016 An intense upper level trough was progressing into the Intermountain West early this morning. Ahead of this system over the plains, lee troughing and southerly winds still resulted in hot temperatures across the plains Thursday.
446 AM EDT Fri Sep 23 2016 A mainly dry cold front will pass through later today and tonight. Fair weather with seasonably cooler temperatures is expected over the weekend. Another cold front will push through early in the new week and could make some rain. The cold front seems to enter the state sometime before sunset. All model data pushes cold front all the way through central PA tonight. Although cooler air will begin flowing in on a northerly breeze, that band of clouds along and just behind the front will keep things mild tonight - especially over the south - with mins between u40s in the northern mtns to around 60F in the south.
312 AM EDT Fri Sep 23 2016 After another warm day today, a weak cold front passing tonight will bring cooler temperatures for the weekend. Mid and high clouds have moved into northwest PA and eastern OH in advance of a developing New England upper trough and a weak cold front.
358 AM EDT Fri Sep 23 2016 High pressure will remain across the region through today. A weak cold front will push south into the area tonight.
Once skies clear out, freezing fog is possible in the mornings, especially in northeast Nevada.
235 AM CDT FRI SEP 23 2016 Surface and upper ridge will continue through the weekend keeping temps well above climatology while drying out the tropsphere.
The synoptic cold front extended from southeast SD into central NEb this afternoon. The Great Basin trough will start to shift east Friday night with a strong jet segment moving into the northern Plains.
406 AM EDT Fri Sep 23 2016 Weak low pressure will continue to meander south of the area today and then dissipate tonight.
Flat high pressure over the region will bring dry conditions and warmer temperatures today. The upper low which brought isolated thunderstorms to the Sierra on Thursday has shifted eastward and northerly flow has developed behind. A weak frontal system moving into the Pacific Northwest will bring some clouds across the northern CWA today but warmer airmass will still bring daytime highs up to just a bit below normal.
317 AM CDT FRI SEP 23 2016 Unseasonably hot conditions will continue today as upper ridge remains across the southern plains/southeast states. High temperatures are expected to be at least 10 degrees above normal with highs in the lower 90s across most of eastern Oklahoma and west-central Arkansas.
204 AM EDT Fri Sep 23 2016 Weak low pressure will continue to meander south of the area through Friday before dissipating. Weak high pressure will build in from the north late week.
427 AM CDT FRI SEP 23 2016 (Today and Tonight) The upper ridge will be pushed farther east today as a large upper trough currently over the Great Basin region begins to advance east across the Rockies.
334 AM CDT FRI SEP 23 2016 The early morning weather map showed a tight pressure gradient overhead, with high pressure set up along the Manitoba/Ontario border and low pressure organizing organizing across southwest WY to CO. Plenty of low level moisture remains, some pockets of DZ and visibilities dropping to around 2SM or less across portions of the area, and especially over the higher terrain east near Summit. Look for much warmer air and a line of clearing to invade the southern third ofthe CWA late this afternoon.
507 AM EDT Fri Sep 23 2016 After another warm day today, a weak cold front passing tonight will bring cooler temperatures for the weekend. Mid and high clouds have moved into northwest PA and eastern OH in advance of a developing New England upper trough and a weak cold front.
330 AM CDT FRI SEP 23 2016 Another unseasonably warm day is expected today as the region remains under the influence of upper ridging and increasing southwesterly flow aloft. To the west, a potent upper trough continues to dig as it moves slowly eastward, with the core of the low expected to progress to the vicinity of the Four Corners Region by this evening. A few storms may move east off the higher terrain this evening into tonight.
Abundant sunshine and warmer temperatures are in store for the weekend. Broad upper level ridging will maintain mostly dry weather conditions across NW California today.
/Issued 434 PM CDT THU SEP 22 2016/ Upper level heights are starting to fall this afternoon in response to a large upper level trough moving across northwestern Nevada. By Friday, the center of the upper level low remains across Utah and at the surface a leeside trough continues to deepen.
355 AM CDT Fri Sep 23 2016 Dry conditions will continue through Friday, courtesy of an amplifying mid-level ridge directly overhead of the local area as depicted on water vapor imagery. Surface winds will become southeasterly through the afternoon, which may act to provide slightly cooler temperatures than Thursday. The more significant impact will reside with slightly cooler dew points, with resulting apparent temperatures peaking only a few degrees warmer than afternoon highs. Cloud cover will remain at a minimum given the placement of the ridge, aside from diurnally driven CU through the afternoon hours.
350 AM CDT FRI SEP 23 2016 A large upper level ridge of high pressure over the Mid South will persist through much of the weekend.
428 AM CDT FRI SEP 23 2016 Upper level low currently centered over the dessert southwest will lift north through the day today while vort max centered at the base of the trough moves through the Four-Corners region into the Front Range. Surface winds will become breezy out of the south ahead of the sharpening trough that drops into northern New Mexico Friday afternoon with increasing cloudiness later in the afternoon and early evening.
222 AM CDT FRI SEP 23 2016 A vigorous mid/upper trough over the Central Great Basin/Southwest states is progged to move eastward into the Central Rockies through the day today.
Models show the closed upper low currently near Salt Lake City lifting northward into central WY by this evening. The warm front will lift northward across the plains through the day with southerly winds strengthening from I-25 eastward. Cold front is progged to be near the Laramie Range by the aftn, and this will be focus for shower/tstm development. There will be a marginal risk of svr storms across the plains and especially north of the warm front. Storm activity over the plains should begin to die down by the late evening with the cold front pushing across the Panhandle by 06Z.
131 AM EDT Fri Sep 23 2016 Low pressure along the coast of South Carolina slides slowly north along a front through Friday with high pressure shifting over the Southern Appalachians.
In addition an upper level trough will remain mostly stationary across the northeastern Gulf. However, the low level wind profile and the presence of cloud convergence bands will be somewhat favorable for waterspout development during the morning hours across portions of the Gulf and Atlantic waters.
247 AM MDT FRI SEP 23 2016 A low pressure system will move through northern Utah today. A flash flood watch remains in effect for the highland areas. Winds will pick up late this afternoon across the Magic Valley to near Pocatello as the low departs the region.
Although not very useful for assessing low level moisture, water vapor loops place an elongated upper low reaching southwest into the central Gulf of Mexico. Highs will top- out near 90, with lows ranging from the lower 80s to the upper 70s, all dependent on cooling from brief downpours.
300 AM EDT FRI SEP 23 2016 Aloft - A ridge centered over the southern plains reached north to Lake Winnipeg, Canada. A trough was along coastal VA/NC/SC. Surface - High pressure was along the Manitoba-Ontario, Canada border while a cold front stretched from the upper Mississippi valley to the Saint lawrence Valley. Relaxed high pressure sprawled from the western gulf coast to the Mid-Atlantic states. A trough was offshore the southeast U.
241 AM MDT Fri Sep 23 2016 08z surface analysis had low pressure over northern CO and southwest WY with developing warm front into eastern NE. Water vapour showed upper low over eastern NV, which is the main forecast concern this morning. This afternoon and this evening, dynamic evolution of aforementioned upper low expected. With temperatures ranging from the lower 60s over northwest SD to the upper 80s over south central SD across front boundary, forecast uncertainty is high.
355 AM EDT FRI SEP 23 2016 One last hot day is on tap for today, before a cool front brings cooler weather for the weekend.
412 AM CDT Fri Sep 23 2016 Currently, there are only a few clouds across the forecast area with temps ranging from the low to upper 60s. That will leave high temps in the low to mid 90s and overnight lows in the upper 60s. Don't worry, cooler temps will be here before you know it.
620 AM EDT Fri Sep 23 2016 Mainly dry conditions are expected to persist today through this weekend as an upper level ridge builds in. Temperatures will remain above normal, but trend a little cooler this weekend behind a weak front.
400 AM CDT Fri Sep 23 2016 Upper level trough over Ontario will move southeast and drop drier air to our east. Upper level low over NV/UT will move into eastern ND by 12Z Sun and over western Ontario by 12z Mon. Upper low takes on some negative tilt. Also upper low opens up after passing the area. Upper level jet segments remain on the east and west sides of the trough through the period. Upper level trough off the Canada west coast will move into central Canada by the end of the period. High amplitude trough will extend from the desert southwest to the Northern Plains to central Canada by 12Z Sun. Then the northern portion of the trough will shear off by 12Z Mon. Upper level jet forecast to dig on the west side of the trough Sun night.
The trough moves into the northern and Central Plains Sat night and into the upper Great Lakes on Sun into Sun night. In the extended, GFS and ECMWF show a 500 mb trough over the northern plains and upper Great Lakes 12z Mon which moves very little through Wed.
337 AM MDT Fri Sep 23 2016 Strong closed upper low now over the Nevada/Utah border area is expected to lift out to the Northeast into Western Wyoming by this evening. Ahead of the low there is a strong Southwest flow aloft over Colorado and varying amounts of banded moisture. Once the low lifts up into Wyoming.
A cool upper low is shifting eastward across Nevada. Mountain peaks and mountain basins will again drop below freezing tonight, and some spots may be even cooler than this morning. This taste of Autumn will be brief, a upper level ridging brings dry and increasingly warmer temperatures to near normal levels Friday, and well above normal for the weekend.
Low temperatures tonight will bottom out in the lower to middle 60s. High temperatures will top out in the lower to upper 80s across the region.
Upper ridging along with high pressure building across the Mid-Atlantic and ridging southwest across the central Gulf coast will maintain dry conditions across the area. Temperatures will also continue to moderate through the forecast period with lows tonight in the low to mid 50s inland to low 60s along the coast. Highs on Wednesday will be in the low 80s inland to around 80 along the coast.
Current Situation and Analysis -- Deep ridging persists across the service area on this breezy and mild evening in the Florida Keys. Prognostic Overview -- Additional increases in wind speeds and wave heights are likely overnight as the high builds southward.
The 19z MSAS surface analysis showed a broad area of high pressure that stretched from northern Ontario south-southeast through the Great Lakes to the Ohio River Valley. Several weak areas of low pressure were situated on the lee-side of the Rockies from southwest SD to northeast NM. Models concur in consolidating and moving a weak area of low pressure from the central Plains to the Upper MS Valley/Midwest tonight. In addition, a strengthening mid-level trough of low pressure is expected to move from the Central Rockies across the Central Plains tonight. Min temperatures to range from the lower 30s far north, to around 40 degrees south.