Aikyam-Lab/Synoptic-Bench huggingface dataset:
125 AM EDT SAT JUL 30 2016 Upper level ridge off the southeast coast allowing an increase in moisture for the weekend. Upper level trough stretching through the OH and MS valley region will slowly shift eastward through the weekend providing a better chance for storms than in recent days. Lee side troughing will continue while a frontal boundary remains across the Mid-Atlantic states, well north of the forecast area.
An upper level closed low will move well north of the Canadian border over the weekend, causing a weak cold front to form over the region Saturday and Sunday.
The weakness in the upper pattern across the lower Mississippi River Valley continues to allow diurnal development of convection. Away from direct marine influences, temperatures are generally in the 70s, but a sites with water nearby are in the lower 80s.
Monsoonal moisture will continue to flow into the area through the period allowing for cooler daytime temperatures and widespread increasing chances for showers and thunderstorms especially in the afternoon hours. Storms will then move along outflow boundaries into the lower valleys by mid afternoon with a general west to east storm motion. Storm activity will linger into the overnight hours as a trough moves across the state.
Strong daytime heating under the high pressure ridge will produce afternoon showers and thunderstorms across the region. Higher storm motions across northern Nevada with the aid of a short wave trough could contribute to higher gusts associated with the downdrafts of thunderstorms that develop. Temperatures will be couple of degrees cooler today and noticeably cooler under locations that develop dense cloud cover associated with convection.
Can't completely rule out a few isolated showers/storms as we remain just downstream of a broad trough axis. Rinse and repeat for Saturday as we remain under a broad upper trof, and the air mass remains juicy. Given the low convective temps in this air mass, expect max temps to run near or just below climo, but with limited cooling at night.
We remain under a very weak flow environment within a deep, weak trofing pattern.
632 AM EDT SAT JUL 30 2016 Cooler and drier Canadian High pressure will build across the area through today.
622 AM EDT SAT JUL 30 2016 High pressure will build across the region today through Sunday.
257 AM MDT SAT JUL 30 2016 Current surface map shows high pressure ridge across the upper midwest, with weak trof across Montana into Wyoming. Upper ridge shifts east Sunday as trof moves across western Canada. Surface trof slides into northeast Wyoming/far western South Dakota Sunday afternoon/evening and will be the focus for thunderstorm development. High temperatures will be in the 80s to around 90s today, with some 70s in the higher elevation of the Black Hills. Warmer on Sunday, with most locations on the plains into mid 90s.
626 AM EDT SAT JUL 30 2016 High pressure will continue to bring oppressive heat and humidity to the region through Saturday. The high will begin to break down beginning Sunday.
503 AM EDT Sat Jul 30 2016 Low pressure will drift east through the Ohio Valley today and Sunday with a weak front trailing east to the Mid Atlantic coast and west into the Central Plains.
A cold front will reach far northern Oklahoma during the late evening on Wednesday, but is likely only to affect KPNC by 12/0600Z.
The next eastern Pacific trough just off the northern California coast will track east across the Great Basin late tonight through Wednesday.
105 AM EST Wed Jan 11 2017 A coastal trough will brush the region overnight into Wednesday.
With mostly sunny skies and 850mb temperatures a few degrees higher than yesterday, highs this afternoon are expected to be in the lower 80s across much of west central Texas, with upper 70s for some of our eastern and southern counties.
238 AM EST Wed Jan 11 2017 A dying cold front/occluded front will move into Central Pa overnight, then stall out along the Mason Dixon Line later this morning. An anomalous upper level ridge will build over the southeast United States later this week and this weekend. The low level inversion is pretty much shielding us from the worst, with the possible exception of some of the highest ridgetops of the Alleghenies, which are seeing gusts to near 45 mph at 07Z. Superblend indicates max temps from the low 40s over the northern mountains, to near 50F in the south. Clouds expected to rapidly overspread the region from the south during the afternoon and evening ahead of approaching warm front, with rain likely developing across the southwest counties by early evening.
420 AM EST Wed Jan 11 2017 A dying cold front/occluded front will move into Central Pa overnight, then stall out along the Mason Dixon Line later this morning. An anomalous upper level ridge will build over the southeast United States later this week and this weekend. The low level inversion is pretty much shielding us from the worst, with the possible exception of some of the highest ridgetops of the Alleghenies, which are seeing gusts to near 45 mph at 07Z. Superblend indicates max temps from the low 40s over the northern mountains, to near 50F in the south. Clouds expected to rapidly overspread the region from the south during the afternoon and evening ahead of approaching warm front, with rain likely developing across the southwest counties by early evening.
Zonal flow aloft and ridging at the surface will prevail through today. Highs will run 5-8 degrees warmer than yesterday, with most inland locations climbing into the lower 70s.
Causeway Police reporting 200-300 yard visibilities at the mid point of the bridge at 230 am.
High pressure will drop southeast thru SW half of ND today with a west to northwest wind in the 5 to 12 mph range. Winds will turn southwest tonight and increase in speed ahead of cold front which will drop southeast out of Canada.
111 AM EST Wed Jan 11 2017 Arctic high pressure has shifted off the East Coast. The southerly flow on the backside of the offshore high plus air mass modification will result in warmer weather which will continue through the rest of the week. High pressure has shifted off the coast. Temperatures will remain above freezing. Warm advection continues on southerly winds, so warmer nights and temperatures above normal Wednesday afternoon, with readings in the low to mid 60s north and central, and possibly around 70 in the south Midlands/CSRA.
Low pressure was lifting out of Upper Michigan this evening with a trailing cold front on approach to PAH and LIT.
High pressure will be centered Northeast of the region this period, with onshore flow continuing. Weak inverted troughing will result in a few showers over the coastal waters, with a few possibly coming ashore Overnight.
320 AM CST Wed Jan 11 2017 Southerly flow is once again established across the forecast area and this is bringing back a warmer and more humid air mass. Some patchy fog is noted over the near shore waters as the higher dew point air moving over cooler shelf waters in the mid 50s starting the sea fog development. Southerly flow at the surface and in the low levels will continue through the weekend, as forecast area will be protected from upper level ridging over the Gulf of Mexico, and upper level low drops down into the Southwest U.
1127 PM CST Tue Jan 10 2017 The cold front that pushed through the area this morning was already entering the Ohio Valley at 20Z. Rapid changes in the weather will continue tonight into Wednesday with another brief warming period tonight followed by another arctic cold front moving through on Wednesday. Winds will become light southerly by early this evening then increase by midnight as a warm front lifts toward the South Dakota border. Steady to slowly rising temperatures are expected tonight across the area as the warm front becomes stationary along the northern Nebraska border and low pressure develops over southwest Nebraska. The next surge of arctic air will then move rapidly south across the state Wednesday morning with the cold front extending from northwest Illinois to southwest Kansas by late Wednesday afternoon.
Whereas earlier RAP appeared to be overdoing moisture, its POP guidance is handling this low QPF onset of precip very well and have blended in RAP guidance for the next six hours. The remainder of the area will be quiet as high pressure builds into the forecast area.
420 AM EST Wed Jan 11 2017 A warm front pushes north on today and tonight.
1155 PM CST Tue Jan 10 2017 Strong cold front to slide southeast of forecast area by 00z Wednesday. This will bring in warmer temps with highs in the mid 50s to low 60s.
The axis of a high pressure ridge will extend from the Atlantic into north Florida. This will provide an onshore wind flow, though a weak coastal trough will persist early this morning and keep winds light. The models show the trough breaking down during daytime heating and diminish the light shower activity.
1142 PM EST Tue Jan 10 2017 Breezy and wet conditions are expected this evening as a cold front moves through. Previous discussion > Cold front with scattered storms moving through ILN/s CWA. Cooler air will move in with the passage of the frontal boundary.
The cold front looks to be pushing south across the plains a bit faster than previously thought, so adjusted the forecast accordingly. Will keep the High Wind Warnings going through 12Z as the models show 700 mb winds coming up to 60 kts over the southern Laramie Range by late evening. With fcsted snow amounts of 2-5 inches through Wednesday aftn along with gusty west to southwest winds, went ahead and issued a Winter Weather Advisory for much of the lower elevations of Carbon county, along with the Arlington area.
Currently, air temperatures in most Keys island communities are holding in the 66-68F range, with dewpoint temperatures in the lower 60s. A surface analysis early this morning reveals a sprawling high pressure cell extending from the Grand Banks of Newfoundland, southwestward to the western Gulf of Mexico. This system has maintained intensity during the last few days thanks to support from aloft via persistent ridging. A mild and breezy weather pattern is expected to persist for much of the next seven days, as persistent, strong mid-level ridging will support the maintenance of a large and robust surface anticyclone and associated well-developed northeast to east gradient flow locally.
241 AM CST Wed Jan 11 2017 Main concern in the short term will be the high fire danger for this afternoon, especially in northeast Oklahoma. Strong arctic cold front will move into northeast Oklahoma by mid evening.
A 500mb trough to zonal flow will remain across the region through the end of the work week.
144 AM EST Wed Jan 11 2017 A front will stall just to our north today then lift north as a warm front late today and tonight, providing a slight chance of showers northern areas this morning.
The frontal zone that moved through the area last evening will return northward today as a warm front, bringing additional chances for showers and perhaps a few rumbles of thunder.
A stronger storm system will likely affect the region by the latter half of the week with showers and much cooler temperatures expected, especially over south-central Arizona. Satellite imagery shows high clouds thickening up again over Arizona and southeast California this evening which is associated with a Pacific trough that has provided much of California with a second round of heavy rain/mountain snow. The higher clouds are in advance of lower level moisture. However, rain shadowing from mountains over California will cut down on the moist advection quite a bit for the lower levels. Overall, temps Wednesday will be slightly warmer than today for our western areas and slightly cooler for our eastern areas. During the latter half of the week, troughing centered over the Pacific Northwest will expand and build southward.
South wind gusts of 20 to 25 KTs are otherwise likely at KABI and KSJT by Noon as lee trough redevelops.
A cold front will settle south of the region overnight with dry weather briefly settling in.
1113 PM MST Tue Jan 10 2017 After yesterday's nasty weather day partly sunny skies and warmer temperatures were observed in Grand Junction. Elsewhere around the forecast area temperatures are running between 3 and 5 degrees warmer than 24 hours ago. The higher elevation valleys will also pick up a quick 3 to 6 inches of new snow overnight as well. The current satellite water vapor image is showing a trough of low pressure pushing into the West Coast with another storm system centered approximately 950 miles off of the Oregon coast.
309 AM EST Wed Jan 11 2017 High pressure will move across the area this morning providing dry conditions.
Warm front snaking terrain of our Northern tier of counties with still mid 40s in DeQueen: They will warm overnight.
113 AM EST Wed Jan 11 2017 Freezing rain and sleet will gradually change to a spotty rain showers overnight.
Additional precipitation tonight and above freezing temperatures will contribute further to the collection of water.
Temperatures will warm up again behind that warm frontal passage, with highs today well above normal, into the 60s for most locations.
Currently a band of showers are working back north as weak sfc boundary that made a run toward the CWA yesterday moves back north as a warm front.
142 AM EST Wed Jan 11 2017 Low pressure will track northward through the Great Lakes tonight, pushing a dying cold front/occluded front through Pennsylvania overnight. An anomalous upper level ridge will build over the southeast United States later this week and this weekend. Precip is ongoing with the far northern counties seeing a mix of sleet and freezing rain. As they grudgingly top freezing, the threat for icing will diminish accordingly. The strong low level inversion is pretty much shielding us from the worst, with the possible exception of some of the highest ridgetops. A Wind Advisory remains up for the Northwest Mountains for wind gusts around or slightly in excess of 45 mph, mainly on these ridgetops. Much milder air will flow into the region behind occluded front, as a mid level negatively tilted ridge will allow for drier air.
1139 PM CST Tue Jan 10 2017 Main forecast challenge through the short term period will be a strong cold frontal passage and chances for light snowfall late tonight and Wednesday. Cross section Analise's shows a deep layer of lift over much of the forecast area, but westerly winds in the mid-levels will limit snowfall coverage and amounts due to the presence of warmer, dry air. A northern stream trough aloft will push through the region Wednesday night well behind the arctic front.
956 PM EST Sun Jan 29 2017 A cold front will move across the region tonight with a ridge of high pressure building east across the region on Monday.
/26/ High pressure at the surface will remain in place across the CWA through the short term period. However, as we currently sit under northwest flow on the backside of an upper level trough, flow will become more westerly as the trough begins to flatten on Monday. This, in addition to our surface flow becoming more southwesterly as a high pressure center becomes situated south of the CWA, will result in slightly warmer conditions on Monday. Then for Monday, highs will top out in the low and middle 60s under sunny skies. Quiet weather will prevail early in the period as the region will transition to being on the west side of an exiting trough early in the period to more zonal flow later in the week. This should leave conditions on the cooler side in the northern part of the ArkLaMiss.
Clearing is progreessing from the northwest as high pressure moves through the area. Small Craft advisory conditions will resume late Monday afternoon with brisk southerly winds due to approaching low pressure from the northern Plains.
1047 PM EST Sun Jan 29 2017 A cold front will move across the region tonight with a ridge of high pressure building east across the region on Monday.
Snow shower activity should really begin to wane by midday Monday as the low level wind direction shifts to the west- southwest and surface ridging takes place. Yet another system will quickly cross the Great Lakes Monday night, spreading light snow across the region along a lifting warm front.
Upper trough continues to move across Eastern Conus. Pressure gradients are expected to begin to relax some allowing for winds to lighten as surface ridging builds over the Western Gulf and into Alabama tonight into Monday. An upper level trof will pass to the east of Alabama by 06z. Sct-bkn mid level clouds associated with the upper trof will erode early in the period.
537 PM CST Sun Jan 29 2017 00Z TAFS Clear skies and light winds will prevail throughout the package as high pressure to the west begins to settle over the region. /issued 231 PM CST Sun Jan 29 2017/ Area is on the backside of a trough that passed through yesterday/last night.
Also, dewpoints have already crept back up into the low 40s nearer the coast with the weakening of the offshore flow. High pressure the moves east across the Gulf of Mexico Monday and Monday night. High temperatures Monday will generally be in the low to mid 70s with light winds continuing. Low temperatures Monday night will range from the low 40s across the ranchlands to the 50s near the coast.
Disturbances moving through the flow will bring periods of increased clouds and perhaps isolated/scattered flurries or sprinkles, but any lingering precipitation across the eastern CWA will quickly shift eastward tonight as the upper trough shifts eastward. Highs tomorrow should be around 10 degrees warmer than they were today. However, the GEM is a stronger outlier with a much deeper trof and sfc wave. As for temps, Tues still appears to be somewhat warm, but have trended twd the cooler guidance with CAA across the CWA and clouds moving into the region. Wind will turn to the southwest across the region on Monday morning as a weak warm front moves through the Mississippi Valley.
A Pacific storm system will bring snow to the highest elevations of the Sierra as well as breezy to windy conditions elsewhere for the last part of the week. A ridge of high pressure remains the dominant feature over the southwest CONUS, bringing a return to above normal temperatures and dry conditions.
549 PM EST Sun Jan 29 2017 A cold front shifts offshore tonight followed by high pressure through Monday.
847 PM EST Sun Jan 29 2017 A cold front shifts offshore tonight followed by high pressure through Monday.
405 PM MST Sun Jan 29 2017 The pattern across the lower 48 begins to deamplify as the California high weakens and the east coast trough exits.
940 PM EST Sun Jan 29 2017 A weak cold front will push through the forecast area tonight.
A Pacific storm system will bring snow to the highest elevations of the Sierra as well as breezy to windy conditions elsewhere for the last part of the week. Mostly clear skies this evening as high pressure continues to dominate the region. A ridge of high pressure remains the dominant feature over the southwest CONUS, bringing a return to above normal temperatures and dry conditions.
High pressure will continue to bring dry weather through the first half of the week. Patchy areas of freezing fog are possible during the overnight and morning hours.
High pressure has kicked off a strong warming trend that will continue Monday. Temperatures today jumped about 8 to 10 degrees compared to yesterday, as the strong high pressure ridge near the west coast begins to take control of our weather. As the ridge tries to phase eastward it will lose most of it's amplitude later this week. Clear skies with unrestricted visibilities as high pressure near the west coast dominates our weather. Dry and warmer through the week.
A dry northwesterly flow aloft will be over Colorado with a ridge over the western u. On Monday, another mild afternoon expected with highs again in the lower 60s, with just some areas of high level moisture moving over the state.
645 PM EST Sun Jan 29 2017 Prospects for accumulating snowfall diminishing for all but the highest elevations of NE GA.
1025 PM EST Sun Jan 29 2017 An upper level trough and associated weak disturbance in the winds aloft will combine with a surface cold front to produce scattered snow showers through tonight. Weak high pressure returns Monday with nearly cooler temperatures. This activity is on the wane with limited moisture and loss of insolation, but with axis of the upper trough still just to our immediate west I can't rule out light scattered activity here and there overnight. By tomorrow parent upper trough axis will swing through the region with little fanfare other than variable clouds and a passing mountain flurry here and there. With high pressure and very dry air in the lower levels at least some partial sunshine is expected across southern counties where downsloping effects will occur. Monday night a weak ridge of high pressure moves overhead.
234 PM PST Sun Jan 29 2017 Strong high pressure remains over the West Coast through Monday. This will bring intense valley inversions, light winds, and poor mixing with pollution buildup likely in the lower valleys.
653 PM EST Sun Jan 29 2017 The combination of an upper level trough moving across the Great Lakes and northwest winds behind it are expected to cause 3 to 6 inches of snow by Monday morning across southwest Michigan and northwest and north central Indiana.
521 PM CST Sun Jan 29 2017 WV imagery this aftn showing a well amplified upper ridge situated across the wrn half of the conus along with a deep downstream trof to the east.
The freezing level was at 7,900 feet with the -20C level at 19,600 feet. An upper trough over the eastern conus will shift east early in the period with northwest flow aloft becoming more westerly by mid week.
810 PM EST Sun Jan 29 2017 Overcast skies linger as a cold front drifts southeastward across Central Cuba and the Bahamas. Winds have decreased this evening on the heels of the cold front exiting. Winds will increase late Monday afternoon again as high pressure builds across the Deep South, and cold air advects over the Northern Gulf of Mexico.
715 PM EST Sun Jan 29 2017 A dry cold front will push through the forecast area tonight.
306 PM MST Sun Jan 29 2017 A mild day across the region as temperatures have increased into the 50s across the lowest elevations of the plains while temps were in the 50s on the divides. Temps in the mtns will be relatively warm as warmer air aloft continues to move into the region (the temps in the SLV will likely be warmer than the temps along the top of the contdvd).
/issued 142 PM CST Sun Jan 29 2017/ We are still looking at a prolonged period of northwest to westerly upper level flow thanks to a dampened ridge along the west coast.
Mid to upper flow looks to flatten out and become more zonal for the Mon night thru Wed time frame, which will allow a series of dry cold fronts to drop south into the plains. Ketcham The better surge of cooler air will drop down on late Tue night or early Wed, with max temps expected to drop back to near climo normals for Wed-Fri. Deep upper trough extends from the eastern Great Lakes into the southeast CONUS.
626 PM EST Sun Jan 29 2017 A dry cold front will push through the forecast area tonight.
600 PM EST Sun Jan 29 2017 A dry cold front will push through the forecast area tonight.
1016 PM EST Sun Jan 29 2017 A cold front shifts offshore tonight followed by high pressure through Monday.
709 PM CST Sun Jan 29 2017 Area of stratocu moving east as anticipated as winds at the 925-850 mb level are southwest and pushing the lower level mositure eastward. Increasing WAA will cause an area of light snow to develop in advance of the the low across the valley and into NW MN. Some concern with the track of the low as the baroclinic zone is farther west than expected currently.
/issued 537 PM CST Sun Jan 29 2017/ 00Z TAFS Clear skies and light winds will prevail throughout the package as high pressure to the west begins to settle over the region. /issued 231 PM CST Sun Jan 29 2017/ Area is on the backside of a trough that passed through yesterday/last night.