Aikyam-Lab/Synoptic-Bench huggingface dataset:
235 AM CST Thu Mar 4 2021 An upper low will move eastward across the central Rockies today before turning southeast over the central/southern Plains tonight. Upper ridging ahead of the low early today will provide clear and mild conditions again, though the initial lift and moisture flux ahead of the upper low will result in increasing clouds and a slight chance for showers across central Kansas by the late afternoon. Rain chances will ramp up markedly later this evening as forcing for ascent increases ahead of the approaching upper low. An area of mid-level convergence and frontogenesis east of the low center still looks to affect portions of central and southern Kansas overnight, which should focus more persistent widespread rain/rain showers. Rain chances will diminish/end during Friday as the upper low/trof moves into the Lower Mississippi Valley.
1052 PM CST Wed Mar 3 2021 Another seasonably warm day across the region as high pressure was leading to plenty of sunshine, with afternoon temperatures well into the 40s and a few spots even hitting 50 degrees. Therefore did include fog in the forecast, with the lowest visibility expected west of the Mississippi River. Expect a similar day on Thursday with high pressure remaining in control, though perhaps slightly cooler with some cooler 925 mb air pushing in and some clouds lingering.
335 AM EST Thu Mar 4 2021 A dry cold front will push through our region later this afternoon and evening. Chilly high pressure will follow and extend across the central Appalachians and southern middle Atlantic through the weekend. As the dry cold front slips south into the region this afternoon, the dew points will lower into the 20s, with some teens in the lee of the Blue Ridge. A deepening northern stream trough across the eastern U.
Showers will diminish by midday Thursday with cooler daytime temperatures. The trough axis associated with this storm system will move over Arizona by sunrise with the majority of the rain and snow associated with this system having already precipitated. An area of low pressure is just about to push onshore into southern California. The low pressure system will quickly push inland this evening and cross northwest Arizona late tonight. Be sure to use caution if traveling overnight as roads across the high country may become snow covered and slick. A ridge of high pressure will shift across the area on Friday with daytime temperatures warming to above normal values for the entire area.
925 PM CST Wed Mar 3 2021 Clear skies and light to calm winds will prevail through the night with high pressure nearly overhead. /issued 345 PM CST Wed Mar 3 2021/ Mid-afternoon sfc analysis shows high pressure centered over the ArkLaTex controlling our area weather at the moment, with a light nerly low-level flow holding dewpoints generally in the 30s.
With subtle mid level ridging remaining in place, tomorrow will be a near carbon copy of today. On Friday, a low pressure system will come moving WNW to ESE across the Southern Plains and into the Lower Mississippi Valley. However, it will bring some cloud cover to the region, especially Friday morning, as well as cooler temperatures, with Fridays highs expected to be in the mid 50s.
1217 AM EST Thu Mar 4 2021 A weak cold front will cross the region Thursday from the north. High pressure system follows from the Great Lakes Thursday night into Friday. Low pressure moves across the southern U.
Increasing cloudiness will commence Friday morning as the high moves east, along with an approaching upper level disturbance from TX/OK. Behind this system will be building high pressure, a return to slightly cooler temperatures, and no precipitation expected for the remainder of the weekend.
Wall to wall sunshine then expected for Thursday under high pressure with afternoon readings close to our increasingly warm seasonal norms. With high pressure dominating the first half of the short term, we can expected clear, cool, and dry conditions through Friday morning.
On Friday the fair dry weather will continue as the high and low pressure systems weaken with a lighter northeast flow across the area allowing for a shift to onshore near the coast during the afternoon.
/issued 759 PM CST Wed Mar 3 2021/ Not much to update this evening as we have entered a calmer stretch of weather following a recent cold front passage. Going into tonight, only adjustments were to morning lows with temperatures averaging on the lower end of forecast guidance.
208 AM CST Thu Mar 4 2021 WV satellite this evening shows a pretty potent upper low (ULL) centered over the AZ/NV border, slowly churning eastward towards the Four Corners. A signature of standing waves is located to the south and east of the ULL as a strong jet max associated with the disturbance crosses the higher terrain of the SW US. With the low level thermal ridge centered from Dawson Co down to Pecos Co, temps up to 15F above normal will be possible prior to a swift moving PAC front late in the afternoon. A cold front will slide south through the Panhandle and through the forecast area by Friday AM, leading to cooler temps areawide (Closer to normal comparatively).
Upper trough remaining across the eastern US will drive a weak dry cold front across the mid-state later today, which eventually settles down along the gulf coast on Fri, then moves farther south over the weekend. This upper trough will transition to a ridge early Fri, then into a fairly sharp trough quickly Fri night. Rain associated with this upper trough passes well west and south in the vicinity of this frontal boundary, while strong SFC/LL high pressure maintains the mid-south.
336 AM EST Thu Mar 4 2021 A back door cold front will push across the area this morning with cold advection expected through the day today. Despite the lack of cloud cover and precipitation, the cold air advection will keep temperatures a bit cooler today. With high pressure nosing into the area tonight and winds dying off, we should see a cold night with temperatures down into the 20s in most places. The cooler weather will stick around on Friday with highs only in the 40s. It will start with a large upper level trough over the eastern CONUS, and an upstream ridge just to the west of it.
Latest surface analysis had high pressure centered over our western zones. Normal morning lows run in the low to mid 40s. As the high drifts slowly eastward to near the Mississippi River by Thursday morning, clear skies, low humidity, and light winds will allow effective radiational cooling.
1030 PM MST Wed Mar 3 2021 Updated Aviation Discussion Continued warm, sunny, and generally calm weather is expected to continue the next couple of days as high pressure remains in control of the weather across North-Central and Southwestern Montana. However, this warm and quiet stretch will come to a close this weekend as a cooler and wetter weather pattern begins to form across the area.
1046 PM EST Wed Mar 3 2021 High pressure centered over the northwestern Gulf of Mexico, combined with a low pressure system northeast of the Bahamas, is driving cooler and drier air through the Keys right now. As a weak and broad area of high pressure pushes offshore of the Southeast coastline on Friday, breezes will veer northeast to east and slacken.
1113 PM EST Wed Mar 3 2021 A mainly dry cold front will pass through this evening, then high pressure will press down from Nunavut and Hudson Bay. Temps will drop into the m20s N and near freezing in the valleys of the SE. Arctic high pressure will extend down into the Gulf Coast states. The coldest of the air will be pressing through the lower lakes and New England.
1229 AM EST Thu Mar 4 2021 A cold front pressing through the region will generate some snow showers while setting the stage for colder weather that will persist through much of the weekend. The cold frontal boundary exits the region tonight, may be just enough snow shower activity to coat the ground in some locations, especially across the Genesee Valley and western Finger Lakes. Upslope flow in the wake of the cold front to keep some nuisance light snow/snow showers over much of western New York for at least the morning hours on Thursday.
1240 AM EST Thu Mar 4 2021 A weak cold front will continue to push south through the Ohio Valley overnight, bringing some clouds but likely no precipitation. Highs on Thursday will be in the 40s, with lows Thursday night in the low to mid 20s. H5 northwesterly flow becomes well amplified on Friday, ushering in some cooler and drier air. With the Ohio Valley being placed downstream of a ridge, widespread subsidence will keep conditions dry with generally clear skies through the period other than a few passing clouds.
/Issued 231 PM EST Wed Mar 3 2021/ Sunny and dry conditions are expected through the short term as low pressure system clears out of the region. Have continued to trend towards the lower end of guidance for dew points given the very dry air mass and the expected atmospheric mixing. Broad upper level trough will usher next low pressure system through the southern Mississippi Valley Friday, increasing moisture over the southeast by late in the day. Friday will be another mild dry day with temperatures in the low to mid 60s.
GKS An upper level low now over southern CA will move eastward into OK by 12Z Friday, then weaken as it passes south of our forecast area on Friday. There will be increased cloud cover though, and this combined with lower upper level heights will lead to cooler high temperatures on Friday.
1022 PM MST Wed Mar 3 2021 20z surface analysis had a diffuse lee trough from central MT into central WY and a weak backdoor cool front from western ND into northeast SD. Water vapour depicted upper low off the southwest CA coast with upper ridge ahead of it across the plains. Thursday/Friday, upper low moves east well south of the CWA. Slightly cooler temperatures Thursday behind aforementioned backdoor front will rebound some Friday as the front transforms into a warm front. Readings will be near guidance, except for a bit cooler Thursday around KPHP.
Tonight through Friday: An upper trough off the coast will continue to provide southwest flow aloft through the period as the trough amplifies.
A weak upper level ridge will remain just west of our region. Sunny skies can be expected today with temperatures well above normal in the upper 50s to middle 60s, with the cooler air lagging well behind the front.
Aloft, the area will be on the inflection point between a deep trough axis over the East Coast and a ridge building across the western CONUS.
High pressure aloft will build in through Thursday and bring a warming and drying trend through Friday.
1033 PM MST Wed Mar 3 2021 Early afternoon WV/IR imagery showed a upper low moving into southern CA, with an downstream upper ridge axis along the spine of the Rocky Mountains. The upper ridge will slide east in the Plains tonight and Thursday, as the upper low tracks east-northeast across the Four Corners and southern CO. Showers will taper off Thursday evening as the upper low pulls away. It will trend cooler Thursday with the added cloud cover and easterly low level upslope. The upper low over the southern Plains weakens as it tracks east across the Lower MS Valley Friday.
300 AM EST Thu Mar 4 2021 Other than slight precipitation chances north and east of Pittsburgh early this morning, building high pressure should maintain dry weather through the weekend. Areas of stratocu are expected to overspread the area this morning, and continue this afternoon, in cold NW flow behind an exiting cold front. Isolated snow showers are possible N of I 80 and in the ridges, though a shallow moisture layer under lowering subsidence inversions should limit this activity. An upper low is progged to persist across Eastern Canada through the weekend.
246 AM EST Thu Mar 4 2021 High pressure builds back in tonight through the weekend, while a developing offshore low is expected to move well south and east of the region over the weekend.
229 AM CST Thu Mar 4 2021 High pressure will remain over the Mid-South today. By Friday morning, an upper level low pressure system will begin to approach the Mid-South. The system will be weakening as it moves into the area, opening up from a closed low to an open trough. The showers will then start shift south during the evening as the upper trough begins to move out of the area. With the CAM models more in line with the GFS and ECMWF solutions, went toward the higher side of guidance in regards to POPS. High pressure will rebuild into the Mid-South over the weekend.
Tranquil weather will persist into Thursday as we remain under the influence of upper level ridging. Overall, we are looking at highs perhaps a degree or two warmer than what we see today with most areas warming into the upper 60s to around 70 degrees. Upper level low pressure will translate southeast across Oklahoma on Thursday night before opening into a wave and crossing the Arklatex on Friday. Cooler temperatures are expected for your Friday with the rainfall and abundant cloud cover along with surface winds shifting to the east. Highs over most areas should generally be in the lower or middle 50s.
Decided to go a couple degress warmer than guidance because of these factors. For Tonight, ridging, dry conditions, and light/calm winds will allow temperatures to drop with large diurnal temperature swings continuing.
Tomorrow should be even warmer with lots of sun before clouds start to move in Friday and things become noticeably cooler.
Breezy southwest winds will develop in portions of southeast Oregon during the afternoon, especially in Harney County, as an upper trough and cold front approach the Pacific Northwest. An approaching Pacific trough will begin to pinch the pressure gradient Thursday, and especially on Friday to bring increased afternoon winds. Moisture associated with the approaching trough axis will introduce a few showers across eastern Oregon by Friday evening, with coverage anticipated to increase.
323 AM EST Thu Mar 4 2021 Cooler airmass settles into the region today ushered in by steady northwesterly upper level flow on the back side of a gradually amplifying trough across northeast NOAM. Northerly flow at the surface in the wake of yesterdays cold front is producing a fair coverage of low stratus that is oozing southward early this morning. Otherwise, expecting dry conditions to prevail for the remainder of the forecast area as surface ridging builds southward out of Ontario and into the Great Lakes bringing increasing stability and deep layer dry air. This should yield daytime highs in the low/mid 30s to 40 degrees for most of southeast Michigan. Areas along the shoreline of the Thumb will be a bit cooler with daytime high temperatures below freezing.
Fairly mundane weather is expected over the next 12-24 hours as ridging induced subsidence keeps skies clear. SW flow in the lower levels has pushed some of the warmer subtropical air northward alleviating the cooler temperatures experienced the last few days. Current expectation are for lows to drop below freezing again overnight, even with some regions exceeding 60 this afternoon. Synoptically, central Indiana will be located downstream of a broad upper level ridge, and west of a deepening trough. Max vorticity values will be south of the trough aiding in its southward movement as moderate CVA lowers heights. This will create a more northwesterly flow orientation aloft, pushing cooler air over central Indiana. This will place central Indiana mostly below freezing with frost expected on most surfaces.
We can expect another gorgeous day with highs scraping the lower 70s and diurnal afternoon east/southeast winds no higher than 15mph. Cloud cover will begin to creep into the region this evening as the mid- level low pressure center makes its journey in the the Southern Plains. A backdoor cold front will push to our SW on Friday as this low passes the area, taking down Friday's afternoon highs into the 50s. Upper level ridging will soon fill in over the region, kicking highs back into the 60s by the weekend and keeping conditions dry and pleasant. As for our next weather system, an upper level trough is projected to deepen just off the west coast over the weekend and broaden as it begins its trek into the western CONUS.
145 AM EST Thu Mar 4 2021 A dry cold front will push through our region later this afternoon and evening. Chilly high pressure will follow and extend across the central Appalachians and southern middle Atlantic through the weekend. As the dry cold front slips south into the region this afternoon, the dew points will lower into the 20s, with some teens in the lee of the Blue Ridge.
Tonight Through Friday Sfc ridging will remain in the vicinity of the state through Thursday with a corresponding H500 ridge axis approaching from the west. With H500 flow across much of the eastern US remaining out of the N/NW the next couple of days, the low making its way onshore along the southern CA coast this evening will only briefly move toward the Four Corners area before being diverted to the SE. At the same time, a cold front will be draped to the north of the state but will begin sinking southward.
Modest ridging aloft and high pressure at the surface. Modest ridging aloft and high pressure at the surface. /issued 244 PM CST Wed Mar 3 2021/ SHORT TERM (Tonight through Thursday night): 500mb ridge across the central United States tonight will shift eastward Thursday into Thurs night as a 500mb low/trough across the western U. high pressure across the east-central U. tonight into Thursday with east to southeast flow across the lower Texas coast. Low pressure will develop across the Texas panhandle Thurs night. Patchy fog will develop across the coastal sections of the CWA tonight as dewpoints recover across the lower Texas coast and winds are light.
Relatively zonal flow begins to evolve into a longwave ridge over the Intermountain West. This blocking pattern keeps any moist weather systems from entering the area. Additionally the light easterly wind component also provides upslope lift along the Buffalo Ridge. The ridge re-asserts itself for the weekend.
As the front departs the region through the day, a shallow layer (below 700m) of northerly flow in it's wake will usher in a drier and slightly cooler airmass for the remainder of the week. As advertised, temperatures should be drop back down to seasonable with overnight lows each morning in the lower 50s west of Lake Okeechobee to lower 60s along the east coast and climbing to the upper 70s to lower 80s by the afternoon.
High pressure system follows from the Great Lakes Thursday night into Friday. Low pressure moves across the southern U.
328 AM EST Thu Mar 4 2021 A dry cold front will push south across the area this afternoon. High pressure builds back in tonight through the weekend, while a developing offshore low is expected to move well south and east of the region over the weekend. Broad cyclonic flow continues over the eastern CONUS today with an upper low centered over the Canadian maritimes. Deep WNW downslope flow will bring mainly sunny skies and warm temps ahead of a dry backdoor cold front that will push through the area this afternoon. NE sections expected to be a bit cooler with the front having the most impact here initially. High pressure builds in from the NW tonight with CAA ramping up after midnight bringing windy conditions along the coast. Lows expected in the low to mid 30s.
501 AM EST Thu Mar 4 2021 Other than slight precipitation chances north and east of Pittsburgh early this morning, building high pressure should maintain dry weather through the weekend. Areas of stratocu are expected to overspread the area this morning, and continue this afternoon, in cold NW flow behind an exiting cold front. Isolated snow showers are possible N of I 80 and in the ridges, though a shallow moisture layer under lowering subsidence inversions should limit this activity. An upper low is progged to persist across Eastern Canada through the weekend.
Northeast winds with strong high pressure to the north of the region will keep highs today in the middle to upper 30s east, to the lower 40s far west. Cooler values should occur near the lake with winds shifting onshore in the afternoon.
Some low cigs across the area this morning as the cold front exits the region. As the front departs the region through the day, a shallow layer (below 700m) of northerly flow in it's wake will usher in a drier and slightly cooler airmass for the remainder of the week. As advertised, temperatures should be drop back down to seasonable with overnight lows each morning in the lower 50s west of Lake Okeechobee to lower 60s along the east coast and climbing to the upper 70s to lower 80s by the afternoon.
Temperature is expected to be around 5 degrees below average under an amplifying eastern CONUS trough. Amplified upper troughing is progged to persist across Eastern North America through the weekend.
Cooler air will settle into the region today with highs dropping back to slightly below normal readings. Increasing high pressure into Friday will however bring a quick return to above normal temperatures and highs in the lower 80s, lasting through the weekend.
518 AM CST Thu Mar 4 2021 An upper level low currently located across southern UT per WV imagery, will track into CO today then turn southeastward toward OK Friday. A deep trough across eastern Canada and New England is causing the southeastward turn, and this track will keep most of the precipitation south of western and north central Nebraska. At the surface expect low pressure to deepen across eastern CO and this turns the low-level flow southeasterly. A subtle wave diving southeast across MN and IA will drive a weak back door cold front into eastern portions of north central NE, and have lowered highs a couple of degrees across that area.
High pressure aloft will result in well above normal high temperatures Friday into the weekend. Cooler temperatures today in the wake of a system that was still passing over NW AZ early this morning but will exit the state by this afternoon. The prospects of any precipitation will be put on hold through the weekend as a ridge of high pressure aloft builds over the region.
An upper level trough and low pressure cyclone will begin moving into the region Thursday night into Friday, which will result in increasing precipitation chances starting Thursday evening. Showers and isolated storms are expected to develop ahead and along a dryline/cold front that will move into western Oklahoma late Thursday night and overnight.
412 AM CST Thu Mar 4 2021 The upper ridge continues to gradually amplify as the axis nudges east towards the North Dakota Montana border.
703 AM EST Thu Mar 4 2021 A dry cold front will push south across the area this afternoon. High pressure builds back in tonight through the weekend, while a developing offshore low is expected to move well south and east of the region over the weekend. Broad cyclonic flow continues over the eastern CONUS today with an upper low centered over the Canadian maritimes. Deep WNW downslope flow will bring mainly sunny skies and warm temps ahead of a dry backdoor cold front that will push through the area this afternoon. NE sections expected to be a bit cooler with the front having the most impact here initially. High pressure builds in from the NW tonight with CAA ramping up after midnight bringing windy conditions along the coast. Lows expected in the low to mid 30s.
Cloud cover will increase this afternoon as this low approaches from the west. Once the low hits southwest KS it'll begin to track southeast. with pops mainly southwest of a line from Cambridge, NE to Jewell, KS. With the delay in cloud cover and the ridging ahead of this disturbance, temperatures today are expected to be similar to yesterday.
630 AM EST Thu Mar 4 2021 A dry cold front will push through our region later this afternoon and evening. Chilly high pressure will follow and extend across the central Appalachians and southern middle Atlantic through the weekend. As the dry cold front slips south into the region this afternoon, the dew points will lower into the 20s, with some teens in the lee of the Blue Ridge. A deepening northern stream trough across the eastern U.