Aikyam-Lab/Synoptic-Bench huggingface dataset:
530 AM CDT Thu Apr 22 2021 Updated for 12Z aviation discussion 12Z TAF discussion: VFR through the forecast pd with high pressure over the region. Winds will be light and variable in proximity to the ridge axis early, though becoming more easterly by midday through the afternoon. High pressure over the region will keep the dry weather in place for the next 24 hrs, with some cirrus moving in from the west. Light/variable to calm winds overnight will continue into the day, picking up more of an easterly fetch as the ridge axis drifts east this morning. Winds slowly veer to east/southeasterly by this afternoon, but return flow is a little slow in regards to warmer air or moisture working into the region.
452 AM CDT Thu Apr 22 2021 Another morning of near to below freezing temperatures to start the day across the local area.
For today, upper trough slides quickly through the central Rockies to our north, with deep w-sw flow across most of srn CO. Wave will push a cold front south through the plains this afternoon, with boundary near the Arkansas River around 00z, and then south of the NM border by 06z. Dry downslope flow and deep mixing will generate high fire danger over much of the plains this afternoon, especially south of the Arkansas River where cold front won't arrive until evening, and have hoisted a Red Flag Warning for several counties over the far south/southeast plains. West-northwest flow aloft will dominate the region as a broad upper trough translates east of the Rockies with several embedded waves.
919 AM CDT Thu Apr 22 2021 After an unusually cold start for the latter half of April, with low temperatures down into the low/mid 30s and widespread frost, a nice warmup is underway. With continued sunny skies, high temperatures should rise into the low 60s. The low level ridge will shift to the east tonight with southerly flow returning in the low-levels. Further to the west, an upper level trough will progress eastward across the Desert Southwest with cyclogensis across the Texas Panhandle. A warm front associated with this system will move northwards across the Gulf of Mexico and move inland along the northern Gulf Coast late Friday. Friday will be a dry day across the Tennessee Valley as the atmosphere saturates from the top down ahead of the approaching upper level trough.
354 AM MDT Thu Apr 22 2021 Clouds will increase across north central and southwest Montana this morning as another cold front brings periods of rain and snow, along with gusty winds, and cooler conditions. Another upper level weather system and as associated surface cold front will sweep south-southeastward out of Canada this morning.
Garuckas Chattanooga Airport, TN 61 42 68 52 68 / 0 10 10 80 100 Knoxville McGhee Tyson Airport, TN 57 38 64 49 64 / 0 10 10 60 100 Oak Ridge, TN 57 38 64 48 64 / 0 10 10 60 100 Tri Cities Airport, TN 52 32 62 43 62 / 0 0 10 20 100 NC.
/issued 410 AM EDT Thu Apr 22 2021/ A stalled out boundary that brought us gloomy, wet, and muggy start to our work week finally start to push south as high pressure moved in yesterday. This resulted in drier and slightly cooler air moving in. As we go throughout the weekend another cold front will be heading our way from the midwest.
1008 AM EDT Thu Apr 22 2021 Cold and windy conditions are expected today as upper level low pushes across our area, snow showers will continue through much of the day, especially in the higher elevations.
404 AM CDT Thu Apr 22 2021 Surface ridging square over the area this AM causing surface winds to be light and variable throughout the region. With the cool air mass in place, as well as clear skies and light wind temperatures are universally at or below freezing, and may drop another couple degrees by sunrise. For the rest of the day the weather will be quiet from an impact standpoint, but as the ridge slowly creeps eastward surface winds will become a little more predominantly southerly.
Gusty southwest winds, dry and warmer conditions are expected Friday afternoon through the weekend.
326 PM EDT Thu Apr 22 2021 High pressure reaching Kentucky will provide dry and chilly weather tonight. Somewhat warmer temperatures and increasing clouds area forecast for Friday as the high moves east.
1051 AM CDT Thu Apr 22 2021 High pressure remains over the Mid-South this morning. Highs should reach into the lower to mid 60s.
/Issued 1035 AM EDT Thu Apr 22 2021/ High pressure center will continue to build in from the west today. /Issued 725 AM EDT Thu Apr 22 2021/ High pressure will build across the state today as a deep trough moves off the east coast. Seeing some freezing temperatures in the northwest this morning. Low temperatures tonight into Friday morning look to be a little warmer than this morning. there could be some values near freezing in the far northeast.
Subtropical jet entrance region impinges on the area Friday after 9 am likely peaking noon-6 pm coincident with the rapid northward shift of the warm front. The presence of the warm front as a potential boundary would locally enhance low level helicity further but even without the the boundary the low levels will be strongly sheared so can not rule out severe across the entire area.
By early afternoon tomorrow, a progressive and sharpening H50 trough will scour and sweep boundary layer moisture east as moderate to strong surface westerly winds spread east out of New Mexico. A cold front pushing south out of the Texas Panhandle should reach our northern most counties around sunset tomorrow evening.
(Today and tonight) Zonal flow aloft will exist today, before becoming southwesterly tonight as an upper level trough moves down into the Four Corners region. Although some warmer air will come in from the southerly flow and overall warming of the air mass, the cloudy conditions today will keep temperatures on the cool side (highs in the low 60s). (Friday night through next Thursday) The upper level trough helping to initiate storms on Friday will start moving out of our area Friday night.
CAMS suggest that supercells may develop near the triple point Friday afternoon somewhere over our western zones, depending on the track of the surface cyclone.
213 PM EDT Thu Apr 22 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
By Friday afternoon, models show a more significant upper level trof over the Central Plains pushing east.
1228 PM CDT Thu Apr 22 2021 Another morning of near to below freezing temperatures to start the day across the local area.
An upper trough will move east across New Mexico on Friday, and into West Texas by late afternoon. With the approach of the trough and increasing mid to upper level ascent, isolated to scattered showers and thunderstorms will develop along or just east of the dryline. (Friday night through next Thursday) The upper level trough helping to initiate storms on Friday will start moving out of our area Friday night.
121 PM CDT Thu Apr 22 2021 (Today and tonight) Zonal flow aloft will exist today, before becoming southwesterly tonight as an upper level trough moves down into the Four Corners region. Although some warmer air will come in from the southerly flow and overall warming of the air mass, the cloudy conditions today will keep temperatures on the cool side (highs in the low 60s).
700mb temperature advection and frontogenesis will help saturate the lower levels resulting in light showers.
Showers have developed over northern ID this morning, accompanying an upper trough dropping south out of Canada.
Otherwise, WV imagery shows an upper trough moving through SoCal/Baja del Norte, leaving West Texas and Southeast New Mexico under SW flow aloft.
240 PM CDT Thu Apr 22 2021 Increasing cloudiness can be expected late this afternoon and this evening with showers moving into central and southeast MO this evening and into the rest of the forecast area late tonight as a northern stream upper level trough centered over western SD this afternoon moves eastward through the Northern Plains. The highest QPF will be across central and southeast MO, southwest of STL.
341 PM EDT Thu Apr 22 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
The upper low is progressing slowly east with its associated cloud cover.
407 PM EDT Thu Apr 22 2021 An upper low was tracking from the Northeast Conus and into the Canadian Maritimes this afternoon while an upper level trough trailed south into the Eastern Conus. Tonight, frost is the primary concern along with sub freezing temperatures. More western locations will experience more cloud cover late and should remain closer to the freezing mark or higher. The cumulus should dissipate thereafter toward 0Z as high pressure builds in.
314 PM CDT Thu Apr 22 2021 High pressure will begin to shift east tonight into the Appalachians which will allow winds to turn around to the southeast. As a result, temperatures will be much warmer than they have been the last couple of nights. Rain chances will quickly begin to increase across the Mid-South by the mid to late evening hours Friday Night as an upper trof begins to eject out of the Southern Plains.
231 PM EDT Thu Apr 22 2021 High pressure will build in from the west tonight and Friday.
High pressure and subsidence at the surface have moved in and are keeping much of the lift out of central Indiana while just off to the east there have been scattered snow mixed showers. A low pressure system will begin to move out of the Plains states and a warm front will spread into the area on Friday night. The dry column will saturate during the course of the overnight Friday night, and forcing will increase as low pressure moves northeast out of the plains toward Indiana.
A weak trough axis and cold front will then cross the region tomorrow, bringing another round of light precipitation.
Slightly cooler air moves in Friday behind a mostly dry Pacific cold front.
Expect all site to go nearly calm by 03z this evening though with high pressure remaining in control. CD Chattanooga Airport, TN 42 68 52 68 51 / 10 10 80 100 30 Knoxville McGhee Tyson Airport, TN 38 64 49 64 51 / 0 10 60 100 50 Oak Ridge, TN 38 64 48 64 49 / 0 10 60 100 50 Tri Cities Airport, TN 32 62 43 62 48 / 0 10 20 100 70 NC.
High pressure Friday. Low pressure crosses this weekend. High pressure again to start the next work week. Most of the activity should occur as rain, but precipitation at times may mix with and/or change to snow, particularly in the higher elevations where thermal profiles are more favorable.
134 PM EDT Thu Apr 22 2021 An upper level shot of reinforcing cold air will create some afternoon showers in eastern sections of the region this afternoon, followed by high pressure settling in tonight. Generally clear skies with light wind will permit temperatures to drop once again at or below freezing for much of the area.
Upper ridging will continue through tonight before moving east on Friday. A warm frontal boundary extending from this low southeast into the Gulf will begin slowly lifting off to the northeast towards the region going into the short term. Highs on Friday will be in the low to mid 70s.
At the surface, high is situated over Tennessee Valley with Lee troughing continuing to deepen. Strong south winds will accompany the warmer temps on Sun with gusts in the 35 to 40 mph range possible. Models continue to agree on an impressive upper trough digging over the West Coast Mon with return flow remaining over the Plains. The progression of this trough will likely be the focus of upcoming forecasts after Fri as it still looks to bring a fairly widespread severe wx episode across the Southern and parts of the Central Plains. Storms should linger Tue night into Wed as the upper trough swings across the Plains.
As rain showers enter the area this evening, dry air in the lowest mile of the atmosphere serves to evaporate much of the precipitation that falls from the elevated cloud layer. Temperatures Friday look largely similar to Thursday's given the mild air mass upstream; however, locations near Sioux City Iowa could be a solid 5 degrees warmer given light south and southwesterly surface flow lingers here until mid-afternoon.
Cloud cover should gradually diminish as we move into the evening and overnight hours, as the mid and upper-level troughs finally push through the island chain. Furthermore, though the low- level flow is northeasterly, it is quite weak, and any shower activity that does develop over South Florida will have a tough time of surviving the trek to the Upper Keys and nearby coastal waters. High pressure will continue to build over the Southeast CONUS.
248 PM MDT Thu Apr 22 2021 The next cold front is on the doorstep of NW WY this afternoon, and should be sweeping across the state through the night tonight.
1224 PM CDT Thu Apr 22 2021 Surface ridging square over the area this AM causing surface winds to be light and variable throughout the region. With the cool air mass in place, as well as clear skies and light wind temperatures are universally at or below freezing, and may drop another couple degrees by sunrise. For the rest of the day the weather will be quiet from an impact standpoint, but as the ridge slowly creeps eastward surface winds will become a little more predominantly southerly.
236 PM EDT Thu Apr 22 2021 Today has been very pleasant area-wide with high pressure over the region bringing drier air and comfortable outdoor conditions.
126 PM EDT Thu Apr 22 2021 Isolated showers this afternoon will give way to dry and potentially impactful freezing temperature Friday morning.
Breezy south to southwest winds ahead of an approaching cold front along with dry conditions has led to fire weather concerns across parts of the region today. Behind the cold front, expect highs to only be around 40 degrees on Friday with cloudy skies most of the day. As a cold front moves southeast through the state Friday dry air rushes in behind, with breezy conditions.
212 PM MDT Thu Apr 22 2021 Areas of rain and snow will transition to snow for most areas by this evening as a low pressure trough moves across the Northern Rockies and Montana. Upper level trough continues to dig south and east through the Northern Rockies and MT tonight. Another cool day is expected Friday with daytime temperatures reaching the low 40s for most areas.
/issued 1051 AM CDT Thu Apr 22 2021/ High pressure remains over the Mid-South this morning. Highs should reach into the lower to mid 60s.
Between the backside of the exiting ridge and the lead impulse. Some drier air in the low levels could delay the onset of precip from reaching the surface.
Through the day, clouds will decrease across the south, but increase across the north ahead of the next cold front progged to move into the region this evening. Temperatures will again be warmer than yesterday, but still below normal for late April. Valleys will see little to no snow accumulation due to the warmer temps, and in fact, most precipiation that falls below 8000 feet will be rain or rain possibly mixed with some snow flakes. Behind the front expect the cooler temperatures to stick around Friday with highs mainly in the 40s.
Have curbed those PoPs to less than 15 percent due to dry air in the low levels that will likely evaporate any precip before reaching the surface. Counties west of I-65 will generally stay above mid 30s while areas east will experience enough radiational cooling to allow temperatures to fall to near or below freezing. Clouds will linger into the afternoon Friday, but expect another dry day with slightly warmer temps in the low to mid 60s.
Mostly cloudy skies are expected across a majority of the CWA through tomorrow morning as lift and moisture pool in the lower atmosphere. As for temperatures, lows look to range form the lower 30s across west central Kansas to mid 40s across south central Kansas. Highs tomorrow are expected to reach into the low to mid 60s.
It will also be a bit warmer too as southerly winds bring some warmer air ahead of the next trough.
Glancing at the larger picture via satellite imagery, an upper level trough encompasses much of the area from southern British Columbia south and east through our region. A third piece to the weather today involves a cooler influx of polar air from Alberta. For the remainder of this afternoon through tonight: 1) Scattered thunderstorms have developed over the higher terrain of the Idaho panhandle and once they tracked across the Montana border, they fizzled out. 2) As the trough swings through the area tonight, scattered snow showers are expected across southwest Montana. Friday will see cooler conditions with continued shower activity, especially though the morning hours. High pressure briefly builds in Friday evening, which will allow for drier conditions and possibly some patchy fog.
143 PM EDT Thu Apr 22 2021 Temperatures will finally moderate today with highs rising close to 50 this afternoon as an upper level ridge builds into the area.
321 PM CDT Thu Apr 22 2021 The upper level low will continue to track across the central Plains through tonight.
Models show an upper level trough to move slowly eastward across the CWA tonight and Friday morning. The low level winds are progged to be normal diurnal trends tonight an Friday. For temperatures, Friday's highs should be 1-4 C warmer than this afternoon's readings. Current forecast has a slight chance of showers over northern sections in this looks fine as the trof passes by.
1136 AM PDT Thu Apr 22 2021 A cold front and an upper level disturbance will deliver locally breezy condtions today from the Okanogan Valley to the western Columbia Basin.
This will allow winds to go calm/very light, and with current dew pts in the upper teens-lower 20s, temperatures falling off toward freezing just after midnight appears likely. Thus, factoring in all the considerations, will call for mins of 30- 34 degrees on average, but will not be issuing a freezing warning due to the marginal/short lived nature of the freezing temperatures (especially compared to last night with the widespread mins in the 20s). Split upper level flow looks to be the rule as we head into the weekend, with the northern stream trough/upper level wave sliding through the northern Great Lakes.
132 PM CDT Thu Apr 22 2021 Another chilly night is in store for the Tennessee Valley as high pressure overhead will result in clear skies and light winds. The dome of high pressure will shift east during the day Friday as an advancing system to our west approaches the area. Precip will start to overspread northern Alabama Friday evening from southwest to northeast as a warm front lifts northward.
an upper level trough and its associated cold front continue their move through the area this evening then out of the area after midnight. Low temperatures are expected to be in the low to mid 60s. On Friday there will be scattered to broken cloud cover ahead of a large scale trough that moves into the Tri-State area by the end of the day.
Lows will be warmer than last night. As we move into the weekend, an upper level trough will move across the central CONUS Friday which will pull a front through.
A high pressure cell is currently parked over the central Appalachians and building southward. As we progress into the overnight, a nocturnal surge will occur as winds accelerate off the mainland in combination with the high pressure building southward. A combination of high pressure building south into Florida Peninsula and a nocturnal surge occurring off the mainland, will lead to freshening breezes for the rest of the overnight.
635 PM CDT Thu Apr 22 2021 Increasing cloudiness can be expected late this afternoon and this evening with showers moving into central and southeast MO this evening and into the rest of the forecast area late tonight as a northern stream upper level trough centered over western SD this afternoon moves eastward through the Northern Plains. The highest QPF will be across central and southeast MO, southwest of STL.
930 PM EDT Thu Apr 22 2021 Freezing temperatures expected overnight.
730 PM EDT Thu Apr 22 2021 Breezy conditions will linger into Friday as strong low pressure remains over southeastern Canada, but the rest of this week will be dry.
Regardless, a cold front will sweep through the terminals Friday evening/night with a northerly wind shift and a risk of another bout of lower clouds. By early afternoon tomorrow, a progressive and sharpening H50 trough will scour and sweep boundary layer moisture east as moderate to strong surface westerly winds spread east out of New Mexico. A cold front pushing south out of the Texas Panhandle should reach our northern most counties around sunset tomorrow evening.
Cloud bases will continue to descend through 12Z, as a well-defined vort max (currently across southern KS/northern OK) tracks eastward into the Lower-OH Valley, resulting in a gradual increase in synoptic scale lift. The dome of high pressure will shift east during the day Friday as an advancing system to our west approaches the area. Precip will start to overspread northern Alabama Friday evening from southwest to northeast as a warm front lifts northward.
High pressure Friday. Low pressure crosses this weekend. High pressure again to start the next work week. Made some minor updates to sky cover based on current satellite imagery and to temperatures and dewpoint temperatures over the next few hours to better represent current observations trending slightly cooler than previously forecast. Most of the activity should occur as rain, but precipitation at times may mix with and/or change to snow, particularly in the higher elevations where thermal profiles are more favorable.
This evening through Friday night The next cold front is on the doorstep of northwest WY this afternoon, and should be sweeping across the state through the night tonight.
But areas along the NW Lower MI shoreline with Ag concerns should remain a few degrees above/below freezing.
Areas of rain and snow will transition to snow for most areas by this evening as a low pressure trough moves across the Northern Rockies and Montana. Upper level trough continues to dig south and east through the Northern Rockies and MT tonight. Another cool day is expected Friday with daytime temperatures reaching the low 40s for most areas.
Lows tonight should generally be around average, ranging from the lower to middle 30s across the north, with lows of 35 to 40 across central and east-central Wisconsin before the clouds arrive. Highs on Friday are expected to range from the lower to middle 50s across central and north- central Wisconsin, to the upper 50s across northeast and east- central Wisconsin away from the lakeshore.
615 PM CDT Thu Apr 22 2021 The upper level low will continue to track across the central Plains through tonight.
Water vapor imagery shows a trough axis just approaching the western edge of Arizona.
It just might be a scenario where the low-level dry air gets entrained and limits coverage and evaporates some of the precip before it reaches the surface. 700mb temperature advection and frontogenesis will help saturate the lower levels resulting in light showers.
532 PM EDT Thu Apr 22 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
1030 PM EDT Thu Apr 22 2021 High pressure reaching Kentucky will provide dry and chilly weather tonight. Somewhat warmer temperatures and increasing clouds area forecast for Friday as the high moves east.
More numerous showers, perhaps accompanied by thunder, will arrive Friday evening, ahead of a compact and deep upper level trof. /issued 314 PM CDT Thu Apr 22 2021/ High pressure will begin to shift east tonight into the Appalachians which will allow winds to turn around to the southeast. As a result, temperatures will be much warmer than they have been the last couple of nights. Rain chances will quickly begin to increase across the Mid-South by the mid to late evening hours Friday Night as an upper trof begins to eject out of the Southern Plains.
Upper level low pressure area spreading light rain into northeast sd this evening with rhs increasing. The upper low is progressing slowly east with its associated cloud cover.