Aikyam-Lab/Synoptic-Bench huggingface dataset:
557 PM CDT Wed Sep 6 2017 High pressure continues to build into the region as trough currently over the eastern Great Lakes pushes toward the northeast US. Weak CAA behind the exiting trough and slightly drier air will lead toward trending just below guidance for tonight.
302 PM CDT Wed Sep 6 2017 Today has been quite pleasant with temps so far only reaching into the upper 70s and low 80s as drier and cooler air continues to filter into the ArkLaMiss behind the cold frontal passage. This anomalously cool and dry airmass combined with clear skies and calm winds tonight will allow for exceptional radiational cooling with low temps dropping into the low 50s over much of the area and a few spots possibly reaching the upper 40s in the Hwy 82 corridor.
359 PM EDT Wed Sep 6 2017 A deep upper trough will keep shower chances in the forecast this evening and during the day on Thursday. Dry conditions are then expected through the weekend as an upper ridge builds into the region. An upper trough digging into the area coupled with enhancement with winds off of the lake has led to scattered shower activity across northern and western portions of the region. With deep trough cannot rule out an isolated cold air funnel this evening. Upper trough will begin to move out of the area however expect it to linger across northeastern portions of the forecast area.
This ridge will move east tonight. The exception will be in the warmer spots of the Metroplex where some lower 60s are expected.
309 PM EDT Wed Sep 6 2017 A cold front will slowly approach from the west today and push through early Thursday.
1238 PM CDT Wed Sep 6 2017 Sharp upper trough extends from southern Ontario into the Ohio Valley with strong northwest flow over the Plains. Meanwhile, lee troughing will strengthen which will allow for temps warming to near seasonal normals by the end of the week. There is still some model agreement in tracking some upper energy out of the northern/central Rockies Thu night into Fri and out across the high Plains.
136 PM CDT Wed Sep 6 2017 The amplified trough over the Great Lakes will continue to swing toward the Eastern seaboard today, with the shower threat following suit with an eastward shift. The large scale flow looks to become much less amplified as we head through the longer term, with the eastern trough lifting out and modest ridging working into the central CONUS.
SHORT TERM (Tonight through Thursday Night): Some isolated to scattered convection has finally develop late this afternoon along and south of an early season cold front that is moving south through the RGV. This will generally lead to cooler temps tonight and Thursday afternoon, with mostly dry weather across the region through the day.
Synoptic Setup: A large ridge resides over the western half of the CONUS and Canada with a large trough over the eastern halves. This has placed south central Montana under the warmer side of northern to northwestern flow.
219 PM CDT Wed Sep 6 2017 A large and persistent high pressure area will dominate the short term weather across the region tonight and Thursday. As the center of the high moves east the risk of frost with temperatures in the low to mid 30s will greatly lessen. While a few temperatures around 40 are possible it is unlikely to be cooler than that. On Thursday, very low humidity of 10 to 15 percent is forecast for southwest North Dakota with 15 to 20 percent across northwest into central North Dakota as temperatures warm into the lower 80s while return moisture is not expected to yet impact the region.
Synoptic scale ridging is pushing east over the TN Valley with a trough axis currently crossing the TN Valley. The higher winds aloft and stronger pressure gradient at the surface have contributed to gusty northwest winds today.
High pressure will remain anchored over western Montana and central Idaho through tomorrow, continuing hot and dry conditions. Widespread smoke across all of the Pacific Northwest will continue to cause degraded air quality, especially in lower elevations where stable conditions related to the high pressure will essentially trap the smoke. /valleys will remain cooler).
Convective potential remains governed by the cold pool aloft and relatively low freezing level, both of which are similar to yesterday. Steep lapse rates produced by 500 mb temperatures near -22C combined with freezing level around 7500 ft will make pea size hail possible in a stronger shower or thunderstorm through mid evening. The upper trough will continue its progression eastward across the region today. The trough axis will be centered over the western Great Lakes by mid afternoon as northwesterly flow will continue to push the cold air into Michigan. The higher rain chances in the overnight hours will reside over the Thumb and Lake Huron. Forecast low temperatures to start Thursday morning will be in the mid to upper 40s and high temperatures in the low to mid 60s.
149 PM EDT Wed Sep 6 2017 A deep upper level trough will dig into the Ohio Valley region through Thursday before shifting eastward by the end of the workweek. Trough is digging into the area today. Dry conditions and more unseasonably cool temperatures are expected tonight, with lows ranging from the mid 40s in the NW to around 50 degrees towards the lower Scioto Valley. Although the primary upper level trough axis will be shifting northeast of the Ohio Valley by Thursday, various pieces of upper level energy will continue to stream southeast into the area within the mid-level northwest flow. Period begins with H5 trof over the Great Lakes.
1227 PM CDT Wed Sep 6 2017 Pleasant conditions are expected to continue as high pressure dominates our weather at the surface. Higher in the atmosphere, northwesterly flow dominates aloft as we are sandwiched between the large upper level trough moving east and large upper level ridge parked over the western US. Highs are expected to be in the low 70s with lows tonight into tomorrow morning in the mid 40s to low 50s. This, along with the western ridge somewhat nosing over the area, will help warm temperatures into the upper 70s for Thursday and then low 80s for the remainder of the period.
252 PM CDT Wed Sep 6 2017 High pressure continues to build into the region as trough currently over the eastern Great Lakes pushes toward the northeast US. Weak CAA behind the exiting trough and slightly drier air will lead toward trending just below guidance for tonight.
324 PM CDT Wed Sep 6 2017 Today was a beautiful and noticeably cooler day as temperatures topped out in the low to mid 70s under partly cloudy skies. Temperatures will warm into the low to mid 70s by the afternoon.
Current surface analysis places high pressure over the northern into the central plains. Upper level analysis places ridge over the western United States and trough over the Great Lakes. Temperatures will be slightly warmer than yesterday, with light winds. Ridge axis gradually shifts over the area this week bringing a warming trend and dry conditions. A wave passes to the north to start the upcoming week flattening the ridge, but at this time no precipitation in expected to develop from this. Light winds from the west or southwest today, becoming very light and variable tonight, then light southwest winds Thursday morning becoming north/northeast as a cold front moves southwestward across North Dakota.
207 PM EDT Wed Sep 6 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. Diurnally driven isolated showers may pop up this afternoon as upper troughing continues to dig over the region, however, expect very limited coverage and most of any precipitation that develops to fall as virga given the dry low levels. Temperatures will max out around 10 degrees below normal with the anomalously deep trough overhead. with a deep longwave trough being the dominant feature. Thursday will see better chances for precipitation as the trough axis crosses the forecast area.
311 PM EDT Wed Sep 6 2017 A deepening upper level trough will swing slowly SE across the Great Lakes and northeast for the next several days. Quiet weather Thursday night as high pressure builds with lows in the 40s and 50s.
234 PM EDT Wed Sep 6 2017 A deepening upper level trough will swing slowly SE across the Great Lakes and northeast for the next several days. Quiet weather Thursday night as high pressure builds with lows in the 40s and 50s.
513 PM EDT Wed Sep 6 2017 A deepening upper level trough will swing slowly SE across the Great Lakes and northeast for the next several days. The deep 500 hpa trough and cold air will make for a good amount of clouds and areas of misty/fog. The deep trough is still over our area and the axis of the deeper part of the trough wants to move over us Thursday.
Cold front has pushed through the area and is now well south of all terminals. Dry air mass aloft and high pressure overnight should keep skies mostly clear, thus VFR conditions are expected through this TAF period. A cold front moving through the area this morning will bring signs of fall-like weather for the next few days.
259 PM MDT Wed Sep 6 2017 The negatively tilted upper ridge currently situated over the intermountain west will slowly shift east the next couple of days. As the ridge builds, may also see a return of wildfire smoke from west to east although latest HRRR model guidance projects the smoke to be of relatively low concentration near the surface.
152 PM EDT Wed Sep 6 2017 Aviation/Hydro Cool and unsettled weather will continue through Thursday night with highs generally in the lower 60s.
High pressure aloft will weaken by Thursday as a low strengthens to our west. Enhanced moisture will gradually expand northward later in the week into the weekend, allowing for increasing chances of thunderstorms and cooler temperatures this weekend. The ridge weakens Thursday as an approaching trough moves on shore of northern California and strengthens the southerly winds namely across southwest Utah.
230 PM CDT Wed Sep 6 2017 Deep mid-level trough along the IL/IN border this afternoon will continue to move slowly east across the Great Lakes through Thursday. With the trough over the upper Ohio Valley by Thursday afternoon, temps should be a bit warmer Thursday and cumulus will likely be a little less plentiful.
247 PM CDT Wed Sep 6 2017 One more night of atypically cool temperatures across the region as high pressure remains over the central and southern plains. Large scale upper ridging will remain centered to the west.
Pattern remains relatively unchanged from yesterday with closed low off the coast. Lightning continues offshore around the base of the low with plenty of moisture and elevated instability streaming into the area. Some of these storms may slide down into the lower elevations portions of the northern & central Sac Valley later tonight into Thursday, though expecting less coverage of lightning in these areas.
442 PM EDT Wed Sep 6 2017 A deepening upper level trough will swing slowly SE across the Great Lakes and northeast for the next several days. Quiet weather Thursday night as high pressure builds with lows in the 40s and 50s.
436 PM EDT Wed Sep 6 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. with a deep longwave trough being the dominant feature. Thursday will see better chances for precipitation as the trough axis crosses the forecast area.
305 PM MDT Wed Sep 6 2017 Upper level ridge over the western portions of the US will continue to build eastward over the state. High will max out around the low 80s with mid to upper 80s expected for Thursday. Models continue to show the strong upper level ridge remaining over the western United States through the weekend. Smoke will continue to be an issue as we stay in NW flow under a stabilizing ridge.
Ridging aloft remains shunted south of the area as an amplifying trough continues to shift over the eastern U. At the surface, high pressure extends over the southern peninsula with a weak frontal boundary dropping into the southeast. As we go through the rest of Thursday, the mid/upper- level trough begins to lift out a bit, allowing ridging to build back in a bit. Weakening mid/upper level trough will be over the eastern U.
310 PM EDT Wed Sep 6 2017 High pressure with drier and cooler weather for the remainder of the week. There are a few minuscule complications in the short term forecast with the upper level trough axis taking its time traversing the northeastern CONUS, allowing sheared out vorticity maxima to track through the northern CWA boundary. Also adding to the lift is a weak reinforcing cold front.
217 PM CDT Wed Sep 6 2017 Early afternoon temperatures were in the upper 60s to mid 70s with dewpoints in the low to mid 40s. Canadian high pressure was centered across the plains early this afternoon with a deep upper level trough from the great lakes into the deep south region. Temperatues in the mid to upper 40s are once again expected with the cooler readings in the eastern Ozarks. The upper trough will drift eastward as we head through the end of the week into the weekend, with rising upper heights and a gradual return of some moisture.
351 PM MDT Wed Sep 6 2017 High pressure centered over the eastern Great Basin has begun its slow retreat this Wednesday afternoon.
1216 PM CDT Wed Sep 6 2017 Synoptic scale ridging will be affecting the region today with a deep NW flow aloft and a somewhat modified cP airmass continuing to advect southeastward. Most of the cloud cover has move off to the southeast with the surface cold front. These clouds are associated with the passing 500-700 mb trough axis where some lift is present. This will allow temperatures to plummet in the lower 50s across much of the Valley.
May have some localized steam fog around some of the warmer water bodies overnight, but widespread fog is not anticipated with dry air advection. The upper-level trough axis will be east of us on Thursday with 500mb heights beginning to rise. The atmosphere between 850mb- 500mb will be very dry as subsidence dominates on the east side of a ridge to our west. Unseasonably amplified upper level trough very slowly weakens across the Northeastern U.
345 PM EDT Wed Sep 6 2017 A cold front will drift east across central NC this afternoon, exiting our coastal plain counties early this evening. High pressure will follow and build from the mid MS Valley east to the middle Atlantic states Thu and Fri. Sfc cold front approaching the highway 1 corridor at mid afternoon. Large mass of showers occurring behind this boundary with temperatures falling into then holding in the lower 60s. High pressure will build into central NC Thursday and Thursday night, initiating a seasonably mild and dry period. Notably cooler most locations Thursday night with most places 50-55. Fri-Sun: Expect pleasant conditions this weekend as high pressure builds S/SE from the Great Lakes into the Mid-Atlantic and an unseasonably dry airmass advects into NC.
157 PM EDT Wed Sep 6 2017 Periods of showers are expected across the North Country through the end of the work week as a slow moving upper trough passes through the region.
345 PM CDT Wed Sep 6 2017 A cold front moved through the area this morning and has pushed well offshore. This dry airmass will let temperatures fall into the lower 60s in the southern CWA and upper 50s in the northern counties tonight for a refreshing preview of fall. ridge and eastern U. trough. At the surface, a stationary ridge axis just to our north will provide a light northeast wind through the forecast period. 42 Katia has now strengthened into a hurricane, however a cold front that moved offshore earlier today will keep the storm in the southern Gulf of Mexico giving the upper Texas coast little, if any, direct impact.
215 PM EDT Wed Sep 6 2017 High pressure with drier and cooler weather for the remainder of the week.
235 PM EDT Wed Sep 6 2017 A series of troughs will drop southeast through the region through Thursday night.
243 PM MDT Wed Sep 6 2017 Latest upper analysis shows a high amplitude ridge over the western half of the CONUS and a trough over the east. At the surface, high pressure is shifting eastward over the great plains states and broad area of weak low pressure is developing over the western states. Tonight and on Thursday, the upper ridge will remain in place over the western CONUS with the upper trough shifting slowly eastward.
Medium The upper trough that's been over the area for the last few days will continue to impact southern Wisconsin through Thursday. In the low levels, a weak low pressure system will drop southeast through the area on Thursday, bringing a warm front into the region by late Thursday afternoon. Most guidance has the warm front primarily over the southwest CWA. This should allow for temperatures in our SW to get several degrees warmer than what we saw today, but our northeast will remain quite cool. The upper trough will set the stage for another round of diurnal showers across our east, similar to what we saw today.
310 PM CDT Wed Sep 6 2017 255 PM CDT Large upper level trough still situated across the region this afternoon and in this pattern, cloud shield has really expanded.
500 PM MDT Wed Sep 6 2017 High pressure centered over the eastern Great Basin has begun its slow retreat this Wednesday afternoon.
153 PM EDT Wed Sep 6 2017 High pressure with drier and cooler weather for the remainder of the week. Cold front is still hung up on the mountains this morning, but should push off well to the east by late morning to early afternoon and showers will come to an end. High pressure builds in with cooler and drier air today, but lots of clouds still today with large field of cold air stratocu developing behind the front with upper trough overhead. Tonight will feel like a cool Fall night with upper 40s for lows in most areas and upper 30s in the higher elevation valleys across Pocahontas and Randolph Counties.
153 PM EDT Wed Sep 6 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. Diurnally driven isolated showers may pop up this afternoon as upper troughing continues to dig over the region, however, have cut PoP values back as coverage looks to be limited and morning soundings showed a fair amount of dry air to overcome. Temperatures will max out around 10 degrees below normal with the anomalously deep trough overhead.
Synoptic scale ridging will be affecting the region today with a deep NW flow aloft and a somewhat modified cP airmass continuing to advect southeastward. Most of the cloud cover has move off to the southeast with the surface cold front. These clouds are associated with the passing 500-700 mb trough axis where some lift is present. This will allow temperatures to plummet in the lower 50s across much of the Valley.
1146 AM MDT Wed Sep 6 2017 Similar weather expected today as we've seen lately with high pressure still in control. The broad area of high pressure looks to start breaking down and become more of a ridge thanks to a weak trough that will move across the US/Canadian border. This is not a big deal, in and of itself, but this meager switch will allow the anticyclonic winds around the high to start bringing in 'some' moisture into the area from the south. Models indicate a minor uptick in activity, increased cloud cover, and cooler temperatures for Thursday afternoon and evening.
Big and cool high pressure system now building into the Mid-Sate, with late morning temperatures only in the upper 50s to lower 60s. VFR conditions are expected to continue through the forecast period, as high pressure builds across the region.
Co-mingled Pacific and Arctic cold fronts continue to impact the Northern Rockies with practically every kind of hazardous winter weather condition. Also, for low elevations of north central Idaho, including the Highway 12 corridor Lowell to Orofino, ponding and poor drainage of water from the past few days may cause hydroplaning and minor flooding issues.
243 AM PST Sat Dec 30 2017 A persistent ridge of high pressure along the West Coast will provide quiet and dry weather through New Years Day, with well above average daytime temperatures and mainly light valley winds.
329 AM MST Sat Dec 30 2017 Upper level analysis has broad trof across the eastern CONUS with weak ridge over the Great Basin area. Snow will taper off and end tonight as arctic high pressure pushes into the Northern Plains.
518 AM CST Sat Dec 30 2017 An Arctic cold front had dropped into southern MO this morning. Given the inter-run consistency of the NAM and corroboration with the GFS and ECMWF, have issued a winter wx advisory for portions of north MS late tonight and early Sunday for light freezing rain/freezing drizzle and sleet. Subfreezing temps and wind should allow for efficient ice accretion on bridges and other elevated objects. Ice accumulation should remain less than 1/10 of an inch, and most likely closer to a hundredth of an inch, enough for a few slick spots on bridges.
956 AM CST Sat Dec 30 2017 Last of the "warmer" air lingering south of I-70 late this morning, where temperatures are still close to 20 degrees. A cold front has recently cleared the forecast area to the southeast. Freezing drizzle has occasionally been reported along and just in the wake of the front. However, any remaining precipitation in the post frontal cloud cover should be trending toward flurries as the low-level moist layer cools sufficiently to contain ice nuclei. Otherwise, very cold conditions will return to the area as Arctic high pressure builds in behind the front.
A weak cold front is currently working its way through the region and looks to be draped southwest to northeast across southeast Oregon as of 3 AM MST. The biggest challenge in this morning's forecast is where we will receive freezing rain as there is ample warm air aloft. With temperatures above freezing being reported at the Boise Airport, Mountain Home and east through the Magic Valley, current thinking is that any freezing rain will not be widespread in these areas, rather, it will be isolated if at all. However, Canyon County and west through the Treasure Valley are still sitting below freezing and will maintain their freezing rain threat through the morning.
745 AM EST Sat Dec 30 2017 Surface cold front has reached the Ohio River and will continue to slide southeast across the area through the day. A cold front will push through the area today, ushering in a reinforcing shot of very cold air for the Ohio Valley region. A minor short wave trough rotating through the region will help kick off some additional light snow Sunday, generally north of I-64. The longwave pattern through the extended highlights stubborn ridging over the western CONUS with a persistent trough over the east.
537 AM CST Sat Dec 30 2017 A significant arctic outbreak has begun for most locations, with the strong arctic cold front pushing across OK at this time. Shallow moisture has led to alot of post frontal stratus developing with some locations even seeing some spotty freezing drizzle or flurries. Expect the arctic outbreak to continue for the rest of the weekend into the New Year, with some of the coldest air of the season settling across the area as a strong arctic high pressure (1054mb!!) area builds south across the region.
536 AM CST Sat Dec 30 2017 A cold front has recently cleared the forecast area to the southeast. Freezing drizzle has occasionally been reported along and just in the wake of the front. However, any remaining precipitation in the post frontal cloud cover should be trending toward flurries as the low-level moist layer cools sufficiently to contain ice nuclei. Otherwise, very cold conditions will return to the area as Arctic high pressure builds in behind the front.
Winds begin to increase from the west today with winds turning to the north after 0z Sunday behind the cold front.
Currently, a high pressure system is beginning to build into the area behind the cold front that is slowly pushing through South Florida. Cold air is also settling into the region with significantly cooler temperatures than previous mornings.