Aikyam-Lab/Synoptic-Bench huggingface dataset:
213 PM MDT Sat Apr 9 2022 Current surface analysis shows low pressure centered over south central SD with the frontal boundary stretching south through Nebraska. Upper level analysis shows the ridge axis centered over us, shifting to the east this evening and Sunday. Temps will likely become cold enough for rain to change to snow at some point Saturday evening or overnight, with accumulations up to 3-6 inches possible Saturday night into Sunday, especially across the higher terrain. The models are also hinting at a band of snow developing along a stronger frontogenesis band from the Pine Ridge to around or east of the Badlands into central South Dakota.
850 mb temps will look to be in the 22-24 (C) range through the night ahead of a cold front. Lows tonight should range from the lower 40s to the lower 50s. By sunrise we should start to see the leading edge of the cold front enter our northwest zones with strong winds along and behind the front. For Sunday it should be a cooler day as the front tracks through the rest of the area by late morning. Winds will gust out of the north to northwest at 20-35 mph allowing good cooler air advection all day.
FROST AND FREEZING TEMPERATURES EXPECTED TONIGHT. This particular vort lobe is cutting ESE into Ohio, and any lingering showers seem to be all rain as we have lost the higher reflectivities that had been noted earlier. Min temperatures tonight will range from the upper 20s in some sheltered valleys to the mid 30s in the Louisville heat island, with most locations slightly below freezing, and plenty of frost.
1108 AM EDT Sat Apr 9 2022 A large closed upper low over the northern Great Lakes and Ontario will maintain showery and unseasonably cool conditions through the weekend.
SIGNIFICANT LATE SEASON WINTER STORM POSSIBLE AROUND MID- Near-term: With the passage of the cold front, winds continue to be blustery across the region while temperatures remain fairly mild. The low pressure system continues to slowly drift off to the east, and some lingering light showers could push through the region through Sunday. This storm would be attributed to a rapidly deepening cyclone ejecting off the Colorado Rockies and then tracking to the north-northeast. Precipitation enhancement with this system could also be aided by any presence of an inverted trough, or TROWAL over the region. Synopsis: Some lingering showers may be possible late this evening as the system bringing the cold front through the region continues to shift to the east.
153 PM CDT Sat Apr 9 2022 Short wave ridging aloft will move east of the area tonight as a short wave trough progresses across the Intermountain West. This surface cyclone will develop in southeastern Colorado and move into the Texas Panhandle during the afternoon.
The region will be between a trough of low pressure to the northeast and high pressure to the west southwest Today. The high will build overhead Tonight, and continue through the day Sunday. Combination of a tight pressure gradient between trough and high, a well mixed lower level, cold advection, and mainly clear skies to help mixing has allowed winds to become quite gusty this afternoon. Clouds associated with trough will pivot off to the northeast later this afternoon, with subsidence under high yielding clear skies overnight into Sunday. A little bit of patchy ground fog is expected Tonight, as cooler air advects in across moist ground.
Cold front has cleared the area and our CWA is now in the cold dry air under the upper trough.
/issued 237 AM CDT Sat Apr 9 2022/ The flow regime today becomes more zonally oriented as an upper level low across central Saskatchewan expands southward with a trough, rotating about the parent circulation, moves into the northern Rockies. With no substantive moisture recovery this morning, fuel states are expected to remain on the high volatility side with easy ignition potential. Speaking of moisture, RH will bottom out close to 5 percent areawide and with 20' winds in the low to mid 20s, this certainly continues to indicate a Red Flag Warning. Tonight, the low level jet will ramp up mainly east of I27 with near 50 KT readings though the nocturnal inversion will temper surface winds overnight.
1146 AM MDT Sat Apr 9 2022 A broad upper level trough of low pressure sits across western Canada this morning with a frontal boundary extending northeast to southwest across the Great Basin.
Northwesterly flow will continue to support the dominating cooler and dry airmass over the region throughout the remainder of today into the night. Additionally, a strong pressure gradient is expected to push through the region tomorrow as a deep trough ejects out of the southeast region, which will cause sustained winds 15-25 mph and gusts up to 35 mph. /AJ/ The upper ridge that has been in place over the weekend, and providing us with drier and quieter weather, will shift east Sunday night.
A Freeze Warning will be in effect for counties in the northeast Georgia mountains Sunday morning where subfreezing temperatures are more likely.
Lingering cloud cover continues to diminish across the cntrl TN Valley this late Sat morning, as the upper trough axis translates further to the east into the Atlantic states. Temps though are slow to rebound given a continued stout WNW wind, which is still allowing some seasonably cooler air to spread across the area. As the upper trough ejects to the northeast tonight, winds subside resulting in a calm and clear night. Southerly flow brings warm and moist air back into the Tennessee Valley on Sunday as high pressure over the Gulf of Mexico builds. Temperatures return to near climatological norms in the low to mid 70s on Sunday.
This surge in winds is thanks to pockets of reinforcing cold air advection behind yesterdays cold front passage. We continue to get pockets of cold air advection because the parent upper level low is not only moving slowly eastward but it is also very expansive. This low extends from the Hudson Bay, down the entire length of the eastern U. As it stands, the peak of when the lowest dew points will occur will not coincide with the strongest winds. As the high slides further east it will emerge over the western North Atlantic and gradually build.
High pressure will be on its way into the region this afternoon and evening, gradually displacing the cloud cover in place along western Lake Michigan. Overnight lows are forecast in the lower 20s to lower 30s. Southeast winds will increase through the afternoon, bringing in some warmer temperatures but also increasing cloud cover. Sunday Night Through Saturday Forecast concerns remain tied to the large low pressure system that will impact the region during the middle part of the week. Low pressure will track northwest of the the forecast area Sunday night, and pull a cold front through the region.
Looking at the current water vapor imagery, troughing is over our area behind an exiting cold front. A wind advisory remains in effect until early evening for Eastern Magic Valley, the Lower Snake plain, and the South Hills/Albion Mtns and the Raft River region.
202 PM EDT Sat Apr 9 2022 A large closed upper low over the northern Great Lakes and Ontario will maintain showery and unseasonably cool conditions through the weekend.
133 PM EDT Sat Apr 9 2022 An upper low with help from some lake enhancement was bringing light snow to Lower Michigan into northern Indiana early this morning.
309 PM CDT Sat Apr 9 2022 Still seeing a few showers in our northeast counties this afternoon, but this activity will continue to diminish as the upper trough moves off to the east. Exceptions will be the Nashville urban heat island, as well as our western row of counties along the Tennessee River where south winds will begin increasing overnight ahead of a developing upper trough over the western half of the country.
Temperatures have risen into the mid 50s to the lower 60s. The strong southerly winds will bring warmer temperatures and an increase in moisture. Highs will climb into the upper 70s to the lower 80s.
An upper level trough over the eastern states will continue to move east today and off the east coast by Sunday morning. The resulting cooler and dry northwesterly upper flow will transition to more zonal on Sunday. At the sfc, high pressure will slide east of the area tonight with a light southerly flow developing on Sunday. Lows tonight will range from the low 40s inland to mid 50s along the coast.
Clearing this evening as pronounced upper level ridging builds over the Western Great Lakes tonight, leading to good subsidence/lowering inversion heights over southeast Michigan.
Cooler afternoon temperatures and low relative humidities will make it feel that much nicer outside. A reinforcing cold front is currently working its way down the peninsula today. This will help reinforce the cooler and drier air. Sunday, with the aforementioned cold front moving through the region, another dry and cooler day across South Florida. High pressure will continue to build across the region and shift eastward. As the high shifts east, winds will become northeasterly and a little less breezy.
but a LOT of uncertainty * REST OF WEEKEND: thank you high pressure! Sunny, dry and seasonable.
Expect rain showers for valley locations with snow showers in the higher elevations of the East Tennessee mountains and southwest Virgina as below normal temperatures remain in place across the region. Issued an SPS to cover light accumulations in the higher elevations of SW VA. KS Chattanooga Airport, TN 36 74 51 75 56 / 0 0 0 20 30 Knoxville McGhee Tyson Airport, TN 34 70 51 75 56 / 0 0 0 10 30 Oak Ridge, TN 32 70 49 74 56 / 0 0 0 20 30 Tri Cities Airport, TN 29 63 42 74 50 / 20 0 0 10 20 TN.
240 PM EDT Sat Apr 9 2022 Clouds will clear tonight and allow temperatures to fall to around freezing. Upper trough will continue a slow slide to the east which will help bring an end to the scattered showers across the forecast area. Overnight, ridging will build to help clear skies and allow for temperatures to drop to and slightly below freezing. On Sunday, the upper ridge axis is forecast to move overhead as an upper trough deepens over the northern High Plains. Sunday night, the upper through swinging from the High Plains into the upper Midwest. At the surface a warm front is shown to lift northwards from southern IN into southern MI.
Temperatures are just cool enough through the profile to support a potential changeover to snow Sunday morning, most likely across the higher elevations of the Prairie Coteau. High temperatures will be in the low 40s to mid 50s across the forecast area on Sunday, below average for this time of year. Low temperatures will drop below freezing for most Sunday night.
210 PM CDT Sat Apr 9 2022 With a lingering cyclonic mid level flow influence across the area due to a deep trof over the eastern Great Lakes, scattered CU/Strato-CU persists east of the MS River. Sunday, south winds will kick up as a strong area of low pressure moves from central KS to southern MN. Temperatures will be noticeably warmer Sunday with highs into the 70s.
The tight pressure gradient between a strong high over the western Gulf of Mexico and the cold front to our southeast is responsible for all the wind today. The high center is forecast to move directly over Florida by Sunday morning.
738 PM EDT Sat Apr 9 2022 Clouds will clear tonight and allow temperatures to fall to around freezing. Upper trough will continue a slow slide to the east which will help bring an end to the scattered showers across the forecast area. Overnight, ridging will build to help clear skies and allow for temperatures to drop to and slightly below freezing. On Sunday, the upper ridge axis is forecast to move overhead as an upper trough deepens over the northern High Plains. Sunday night, the upper through swinging from the High Plains into the upper Midwest. At the surface a warm front is shown to lift northwards from southern IN into southern MI.
With a lingering cyclonic mid level flow influence across the area due to a deep trof over the eastern Great Lakes, scattered CU/Strato-CU persists east of the MS River. Sunday, south winds will kick up as a strong area of low pressure moves from central KS to southern MN. Temperatures will be noticeably warmer Sunday with highs into the 70s.
404 PM CDT Sat Apr 9 2022 For tonight, an upper level trough will approach the area. Temperature profiles will be able to support some snow from the panhandle up through the northwest sandhills with around an inch of accumulation near the Pine Ridge and lesser amounts further south and east. The upper trough axis will move across north central NE, with a continued chance for showers in the afternoon and evening.
With high pressure centered nearby, winds will be relaxed (compared to the past couple of days) through tonight before the gradient tightens again tomorrow in response to pressures lowering over the srn Plains while the high pushes ewd.
Dry conditions and cooler temperatures will persist today and tomorrow. This afternoon into Sunday night A trough will continue to move through central and northern Nevada this afternoon causing westerly to northwesterly wind gusts ranging from 25 to 35 mph. Highs will be cooler than the past few days ranging from the 50s in northern Nevada to 60s and 70s in central Nevada. A cold front will drop south into northern Nevada tomorrow evening bringing a return to wintry precipitation to northern Elko and Humboldt counties.
A line of counties will be added to the southern send of the Warning, from Rhea to Polk, based on forecast low temperatures in the lower 30s. Scattered showers will be dissipating in the next hour or two as an upper low moves away and the low levels stabilize. High pressure will build over the area through the night, leading to light or nearly calm winds. DGS Chattanooga Airport, TN 36 74 50 74 55 / 0 0 0 20 30 Knoxville McGhee Tyson Airport, TN 33 70 49 73 55 / 0 0 0 10 30 Oak Ridge, TN 32 69 49 71 55 / 0 0 0 20 30 Tri Cities Airport, TN 29 63 39 73 51 / 20 0 0 10 20 NC.
Temperatures at or below freezing in the mountains and valleys of NE GA have prompted another freeze warning. A Freeze Warning will be in effect for counties in the northeast Georgia mountains Sunday morning where subfreezing temperatures are more likely.
646 PM CDT Sat Apr 9 2022 Gusty south winds will decrease again after sunset and stay on the lower end the rest of the night.
The inverted trough will be partially swinging through the region during the overnight period, with rain showers possible on the backside of the trough axis across central SD as it stalls out. Could see a brief period during the afternoon where winds may gust up to 30 mph as the low moves through, but otherwise winds will remain up to around 20 mph. Temperatures will generally be in the lower 50s where there are persistent showers and lower 60s across portions of NW Iowa.
The strongest gusts of around 40 mph may end up being in the higher elevations of far southeast Oklahoma and Western Arkansas as 925-mb winds of 40-50KT and 850-mb winds of 50-60KT are forecast tonight. These conditions will help to keep temperatures warmer tonight with forecast lows in the 50s for the majority of the CWA.
As temperatures increase through the day Sunday the rain/snow mix will likely become all rain with the exception of the higher terrain over southern Cook and Lake counties. Temperature profiles show the column to be below freezing with somewhat dry air above 700mb.
This should allow decent radiational cooling of our cool dry airmass and lead to another cooler than normal start Sunday morning. Northwesterly flow will continue to support the dominating cooler and dry airmass over the region throughout the remainder of today into the night. Additionally, a strong pressure gradient is expected to push through the region tomorrow as a deep trough ejects out of the southeast region, which will cause sustained winds 15-25 mph and gusts up to 35 mph. /AJ/ The upper ridge that has been in place over the weekend, and providing us with drier and quieter weather, will shift east Sunday night.
923 PM CDT Sat Apr 9 2022 Latest data continues to show increasing gradient winds through tonight and into Sunday, as surface cyclone in the plains continues to intensify and shift more toward the Midwest increasing the pressure gradient between it and high pressure over the southeastern conus. Did leave out, at least for now, the lower elevation zones in the Arkansas River Valley and far north, as sustained speeds look likely to stay just below criteria.
Late tonight, a cold front will move into the region, pushing through the local area between 2am and 7am Sunday morning.
Continue to expect another chilly night with light winds as high pressure moves overnight.
336 PM MDT Sat Apr 9 2022 A broad trough will sit over the area through Sunday night. Sunday will be cooler with clouds and a few areas of precipitation around and a boundary drops south from Canada.
JKL A broad trough will sit over the area through Sunday night. Sunday will be cooler with clouds and a few areas of precipitation around and a boundary drops south from Canada.
1025 PM EDT Sat Apr 9 2022 Cooler temperatures, clear skies and dry conditions tonight as high pressure builds over the area. Current temperatures are in the low 60s, except upper 50s from Leesburg to Sanford northward. Much cooler temperatures are expected across east central Florida tonight, with a few locations forecast to tie their record low temperatures (see climate records below). Afternoon temperatures will remain below normal across the area, only reaching the low to mid 70s along the coast and mid to upper 70s inland.
Still seeing a few showers in our northeast counties this afternoon, but this activity will continue to diminish as the upper trough moves off to the east. Exceptions will be the Nashville urban heat island, as well as our western row of counties along the Tennessee River where south winds will begin increasing overnight ahead of a developing upper trough over the western half of the country.
744 PM EDT Sat Apr 9 2022 The western flank of the upper level trough and cold air aloft remains in place over Southeast Michigan.
946 PM EDT Sat Apr 9 2022 A deep upper level trough will maintain below-normal temperatures through tonight, with snow showers coming to an end near the border of North Carolina and Tennessee, and frost or freeze concerns for most of the region. This cold upper trough will be moving east on Sunday while being replaced from the west with an upper level ridge.
525 PM MDT Sat Apr 9 2022 Current surface analysis shows low pressure centered over south central SD with the frontal boundary stretching south through Nebraska. Upper level analysis shows the ridge axis centered over us, shifting to the east this evening and Sunday. Temps will likely become cold enough for rain to change to snow at some point Saturday evening or overnight, with accumulations up to 3-6 inches possible Saturday night into Sunday, especially across the higher terrain. The models are also hinting at a band of snow developing along a stronger frontogenesis band from the Pine Ridge to around or east of the Badlands into central South Dakota.
A cold front associated with this system will push into Denver in the 8-10 pm range with northeasterly post frontal winds. On Sunday, it will be around 20 degrees cooler. Not enough wind for a high wind warning, but strong winds will elevate the fire weather conditions in spite of the cooler temperatures.
Upper ridge finally expected to build into the region tonight and hold through Sunday.
656 PM CDT Sat Apr 9 2022 For tonight, an upper level trough will approach the area. Temperature profiles will be able to support some snow from the panhandle up through the northwest sandhills with around an inch of accumulation near the Pine Ridge and lesser amounts further south and east. The upper trough axis will move across north central NE, with a continued chance for showers in the afternoon and evening.
Lows will bottom out in the lower 40s inland and the lower 50s along the coast. Northwesterly flow aloft will become zonal overnight and into Sunday morning as an amplified upper level ridge to our north slides across the Northern Plains and Midwest.
Monday will be dry for the area but an upper level Low moves out over the Divide Monday night and causes a Colorado Low to develop and eventually track northeastward.
Low and middle tropospheric water vapor channels have shown dry air flux this morning, with turbulent dry mountain waves noted alee of Appalachians ridges. As departing and large low pressure area releases grip on region, winds relax into evening and become light SW as high pressure migrates off FL and SE coast. Fine radiational cooling tonight, SW flow helps keep temperatures well above freezing in 40s preventing agricultural damage. Ridging aloft and at the surface keeps the area dry and sunny, with southwesterly flow at the lower levels providing plenty of warm air advection.
335 AM CDT Sun Apr 10 2022 An area of low pressure and a broad upper level trough will cross the region today into this evening. While temperatures and dew point appear warm enough to support a rain event, would not be too surprised if light snow develops over the higher terrain areas of the Sisseton hills later this afternoon. An area of low pressure, along with an upper level trough will cross the area on Monday afternoon, bring the showers, and perhaps thunderstorms to eastern South Dakota and western Minnesota.
1206 AM EDT Sun Apr 10 2022 The western flank of the upper level trough and cold air aloft remains in place over Southeast Michigan. Clearing this evening as pronounced upper level ridging builds over the Western Great Lakes tonight, leading to good subsidence/lowering inversion heights over southeast Michigan.
Ridging aloft and at the surface will keep the area dry with a warming trend Sunday night through Monday night. Mostly clear skies Monday with high temps near 80 and a healthy sea breeze keeping coastal areas in the low 70s. A trough moves across late Monday increasing high cloud coverage, but too dry for anything more than that. Low temps Monday night a good 10 degrees warmer than previous nigh in the mid 50s.
High pressure will be on its way into the region this afternoon and evening, gradually displacing the cloud cover in place along western Lake Michigan. Overnight lows are forecast in the lower 20s to lower 30s. Southeast winds will increase through the afternoon, bringing in some warmer temperatures but also increasing cloud cover.
With high pressure building into the area, VFR conditions expected at all sites through the period. SR Chattanooga Airport, TN 74 50 74 55 79 / 0 10 40 30 20 Knoxville McGhee Tyson Airport, TN 70 49 73 55 79 / 0 0 20 30 20 Oak Ridge, TN 69 49 71 55 77 / 0 10 30 30 20 Tri Cities Airport, TN 63 39 73 51 75 / 0 0 10 20 20 NC.
Cooler, drier weather today as a surface area of high pressure lingers over the peninsula of Florida to close out the weekend. Aloft, the pattern is a little more active with a mid-level trough departing into the Atlantic and zonal flow attempting to return from the Gulf. Sunday will be dry and cooler with sunshine across the area.
Short range guidance agrees these features will continue east and then northeast through the short term, bringing a cold front through southwest KS early Sunday morning. However northerly winds behind the front will advect cooler air into southwest KS, knocking afternoon highs back down into the upper 60s in the northern zones to the mid 70s near the KS/OK border. A low pressure center in central Oklahoma will also move northeast during the night and could clip our far southeast zones with a slight chance of rain towards Monday morning.