Aikyam-Lab/Synoptic-Bench huggingface dataset:
730 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.
704 PM EDT Thu Apr 22 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
Dry Friday and Friday night as a Pacific short wave ridge passes through.
730 PM EDT Thu Apr 22 2021 Geopotential height rises will support surface ridging across Southeast Michigan during the next 24 hours. 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.
308 PM PDT Thu Apr 22 2021 Scattered showers over the high Sierra into this afternoon and evening.
Mid and high clouds will continue to increase over the area tonight helping keep areas west of I-65 a bit warmer in the upper 30s. Areas east of I-65 are still expected to dip into the lower 30s under better radiational cooling, and will leave Frost Advisory/Freeze Warning as is for tonight. 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.
/issued 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.
/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.
A short wave trough will kick out ahead of the upper trough that will move into Hill Country late tonight and reach our CWA early Friday morning.
High pressure will settle into the southeast U. While the evening hours will see a decrease in cloud cover due to diurnal reasons, the low-level flow (above surface) will veer to nearly ERLY by sunrise and this could gradually bring a few more marine clouds to the coast. Easterly winds will become breezy at times (gusting to around 20-25 mph) as the high pressure moves into the western Atlantic.
1027 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.
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.
758 PM MDT Thu Apr 22 2021 Some areas of light snowfall are ongoing in the high country, and some isolated showers are making it east out over the adjacent plains but producing only light rain and virga. It still looks like lows tonight will be slightly warmer than those last night, in the upper 20s and lower 30s F on the plains and upper teens to lower 20s F in the mountains. 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.
A mid-level trough will track east across the Southwestern states as a developing low takes shape.
657 PM CDT Thu Apr 22 2021 Cold front has now shifted into far northwest North Dakota. 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.
Interior northwest California will be dry and warm through Friday, while cooler marine air will linger near the coast.
725 PM EDT Thu Apr 22 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
517 PM EDT Thu Apr 22 2021 Freezing temperatures expected overnight.
155 AM EDT Fri Apr 23 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. Low pressure traveling from the southwest will bring widespread showers on Saturday. Friday will feature dry weather as high pressure advances toward the Atlantic Coast. Increasing mid level clouds will be observed as moisture moves in ahead of the next low pressure system. While temperatures stay below normal, highs around 60 will feel warmer compared to the last two days. Warmer lows in the 40s will result in all liquid precip.
(Today and tonight) Positively tilted, high amplitude trough moving into the great basin is handled very similarly by models, approaching our region this afternoon and evening. With intensifying mid-upper level jet progressing out of the base of the trough across northern Mexico into Texas late today, trough takes on a more neutral/longitudinal orientation.
1042 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. Another round of more significant showers along with isolated, embedded elevated storms can be expected Friday afternoon through Saturday morning as upper level divergence increase over the region as a southern stream upper level trough in the Southern Plains approaches.
Temperatures had fallen into the 30s, with temperatures near freezing in the far east. The lower atmosphere remains dry, so doubt any light precipitation generated by the initial upper energy will reach the ground. A larger upper trough will approach from the west. The upper trough will move across the area on Saturday. Today's temperatures will be a little warmer than yesterday, especially if sunshine breaks through.
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. The upper trof will move into the Mississippi River Valley Saturday morning. Winds will switch around to the northwest behind the passing cold front.
On Saturday night, high pressure will build across the region.
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. Low temperatures will be generally in the low 30s.
Decent short wave trough easily detectable on WV this morning crossing the northern Plains. Short range solutions suggest a weak warm frontal boundary stretched east west along the lower valley, with ample moisture and lift residing across the southern half of Missouri. Overall, anticipate 1 to 2 inches across the Ozark Plateau to around a half inch to an inch and a quarter along and immediate south of the Lower Missouri to the Lake of the Ozarks Region in mid-MO. Rain will end through Saturday morning, with only a brief cool down, post front, with highs Saturday in the low to mid 60s.
335 AM EDT Fri Apr 23 2021 Dry conditions today before rain returns Saturday with low pressure. Dry conditions will prevail through the period with high pressure in control. Rain chances will increase through the day, peaking during the evening hours as the trough begins crossing the region and becomes slightly negatively- tilted as it phases with the northern stream trough.
402 AM EDT Fri Apr 23 2021 Today should be quiet as the flat upper ridge passes over the state. A southern stream short wave will move from the lower MS Valley across the southeast states late tonight and Saturday. This will result in a strong southerly flow into the forecast area across a surface warm front that should push northward across the area. Forecast concern will be where the axis of heaviest rain sets up along the warm front boundary.
Ridging builds back into the region this evening and tonight, for a dry cool night. Southwest flow brings a good chunk of moisture into the area, ahead of an approaching Pacific trough.
(Today and tonight) Low level moisture continues to stream north into the area, ahead of an approaching upper level trough.
Per discussion with neighbors, lowered temperatures slightly for tonight into the low 20s mainly along the northern half of the forecast area.
140 AM EDT Fri Apr 23 2021 Breezy conditions will linger into Friday as strong low pressure remains over southeastern Canada, but the rest of this week will be dry.
At the surface, the area will remain on the southern edge of high pressure, but model soundings suggest the column will have no trouble saturating enough for some light precip, mainly in the form of rain, though a few snowflakes could mix in toward Saturday morning given lows in the lower to mid 30s.
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 weak disturbance will move across the High Plains and could cause some precipitation for extreme northern portions of the area Saturday night, it'll be a glancing blow with the better chances into SD, northern IA and southern MN.
209 AM CDT Fri Apr 23 2021 Lots of clouds out there and noticeably warmer across our western counties than the last couple of mornings.
408 AM EDT Fri Apr 23 2021 High pressure to the south will move east and keep a southerly and generally mild flow in the Ohio Valley today. An upper level trough will see cloud cover overspread the region today and tonight, and then rapidly move east on Saturday afternoon. Rain will be found along and ahead of the trough as a circulation develops in the mid levels of the atmosphere.
A weak trough axis and cold front will then cross the region tomorrow, bringing another round of light precipitation. Weak upper ridging will then build into the area Fri night into Saturday.
1101 PM EDT Thu Apr 22 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
and Saturday Middle and high clouds will increase today in warm advection ahead of a weak upper trough. Some light rain may arrive in northcentral Wisconsin late tonight along a cold front and somewhat stronger upper trough. The cold front will move slowly across the region Saturday, accompanied by light rain showers. Cold advection behind the front will make for much cooler temperatures across northcentral Wisconsin, with temperatures moderately cooler across the remainder of the area.
225 AM MDT Fri Apr 23 2021 Band of snow showers behind the previous cold front will make its way out of northeast Montana by the early afternoon. Next feature to keep an eye on is an upper level Low digging into the Pacific Northwest.
The lowest flight conditions will be seen on the latter half of the TAF period.
1004 PM CDT Thu Apr 22 2021 Cold front continues to push through northwest North Dakota, with some gusts to around 40 mph in its wake. Cold front has now shifted into far northwest North Dakota. 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. As the cold front pushes through the area, temperatures drop and conditions turn dry across western ND. Relative humidity values across the area are on the lower side ranging from 15-30% Saturday.
Observed temps are following pretty close to the forecast in most spots, so our forecast lows in the lower 30s north to lower 40s south appear on track. CDG Chattanooga Airport, TN 67 50 70 52 72 / 10 80 100 30 0 Knoxville McGhee Tyson Airport, TN 63 47 66 50 68 / 10 60 100 50 0 Oak Ridge, TN 63 46 65 49 68 / 10 60 100 50 0 Tri Cities Airport, TN 61 43 61 48 64 / 10 20 100 70 0 NC.
350 AM EDT Fri Apr 23 2021 Breezy conditions will linger into Friday as strong low pressure remains over southeastern Canada, but the rest of this week will be dry.
135 AM EDT Fri Apr 23 2021 Aviation - Not as cold tonight as Upper Trough Moves East - Rain on Friday night and Saturday as Low Pressure tracks south of Lower Michigan - Not as cold tonight as Upper Trough Moves East Instability snow showers have moved east of the forecast area this afternoon and even flat cu is dissipating as upper trough moves out and heights rise. After the last two nights in the 20s, low temperatures tonight are expected to be in 30s with most places near or above freezing. - Rain on Friday night and Saturday as Low Pressure tracks south of Lower Michigan Area of isentropic ascent and return flow moisture transport from the Gulf/Southern Plains associated with southern stream low will increase rain chances Friday evening.
The high pressure center moves off the Carolina coast by early Saturday morning as troughing moves eastward into the Mississippi River Valley and an area of low pressure develops near LA/AR/MS. This area of low pressure and frontal boundary will move through the southeast U.
There is some very weak ridging at 500mb, which may help to hinder convection today. By Saturday, a low pressure system is forecast to develop and move across the southeastern US. This system will push the high away from the area, causing the flow to become more southeasterly, and possibly allowing some additional moisture to advect into the area.
Not looking like we will see these low-level clouds develop like the earlier models suggested given the higher moisture is stalled well to our south and upstream obs in IA/MN are indicating ceilings higher than 5kft. Then we are looking at another opportunity for some showers on Saturday as broad upper- level trough sweeps through the central CONUS and a surface cold front drifts across WI.
128 AM EDT Fri Apr 23 2021 The recent cold snap will moderate into the weekend with more sunshine and warmer temperatures expected on Friday.
1155 PM EDT Thu Apr 22 2021 Geopotential height rises will support surface ridging across Southeast Michigan during the next 24 hours. 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.
CIGS have dropped a bit faster than the previous forecast, with showers noted at a few sites out to our west in response to a warm front lifting north into the area.
Despite the increasing midday cloud cover, moderate WSW flow will allow for temperatures to push to around normal in the low 60s. Southerly winds weaken tonight but widespread clouds will still allow for a relatively milder night, in comparison to previous nights, with lows falling down into the low 40s. Some additional light scattered showers/drizzle are possible early Saturday night mainly over the Saginaw Valley and Thumb as trailing cold front from the northern wave swings across the lower peninsula.
At the surface, high is situated over the 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.
Temps out in the clear skies out across our far east were at or just below freezing. Overnight lows will drop into the lower 40s out across the Bluegrass region with lows in the mid-upper 40s from the I-65 corridor and points west.
Large high pressure ridge extends from the MS Valley to just offshore the mid Atlantic and SE coast early this morning.
High pressure will be centered to the north of the region through Tonight. Subsidence under the ridge will provide for mainly clear skies. The position of the high will yield onshore flow, with the sea breeze pushing well inland this afternoon. The high will then build toward the east northeast Friday into Friday night. A warm front will lift northeast across SE GA Friday night. A few showers will be possible across SE GA overnight as the warm front lifts through.
1113 PM CDT Thu Apr 22 2021 The upper level low will continue to track across the central Plains through tonight. Regardless, the trough pushes into eastern Nebraska by early Saturday morning with any precipitation ending by then as well.
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.
Tonight into early Saturday a broad, positively tilted longwave trough will shift out of the plains and slowly approach the Mississippi River valley.
High pressure to the north of the area, is forecast to strengthen as it moves to the east. High pressure then builds into region on Friday, resulting in breezier conditions across South Florida as the pressure gradient tightens.
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.
In the wake of this system, a cold front will move through the forecast area on Saturday, but little cold air is associated with the system resulting in readings warming near/slightly below seasonal levels.
445 AM EDT Fri Apr 23 2021 Temperatures are starting out below freezing this morning across much of the forecast area, after a night of light winds and mainly clear skies allowed for unseasonably cold weather. The trough will weaken and wash out as it passes over today. Broad, weak ridging aloft then passes over this evening with fair weather, before a more significant upper level system approaches from the west. Overrunning moisture should bring a large area of rain to the north of the low, including the JKL forecast area. The extended will start off extremely dry and warm, as a large ridge of high pressure remains entrenched over the region.
230 AM EDT Fri Apr 23 2021 Cold high pressure will push east off the NC coast today. A low pressure system will track from the Gulf Coast states across the Southeast states Saturday into Saturday night, bringing widespread rain.
By Friday afternoon, models show a more significant upper level trof over the Central Plains pushing east. Reasonable model agreement showing a s/wv trof will move from the central Plains Friday night to the Appalachians by the end of the day Saturday. A larger scale positive tilt trof is forecast to set up either over the central U.
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. Beginning Saturday morning, high pressure will have settled in across the region post-frontal, keeping skies clear and conditions dry.
A trough will shift east of the area this morning, with the ridge building in from the west behind it bringing a rapid warming trend over the weekend. A strong low near the Aleutian Islands will dig into the Pacific Northwest over the weekend with a broad and deep trough subsequently developing over western states the first half of the new week.
703 AM CDT Fri Apr 23 2021 Summary: Widespread rain showers are expected today as low pressure crosses the area. Tonight, rain will transition to snow as temps drop below freezing. The higher elevations of the Arrowhead and portions of northwest WI will see slightly higher amounts of 1-1. This low will bring widespread rain across the CWA throughout the day today. As temps drop below freezing tonight, expect rain to transition over to snow. This is due to sub-freezing temps lasting into tomorrow morning in these areas as well as a longer residence time within the area of precip.
800 AM EDT Fri Apr 23 2021 With clouds moving in from the west, temperatures have warmed above freezing across the CWA. Temps out in the clear skies out across our far east were at or just below freezing. Overnight lows will drop into the lower 40s out across the Bluegrass region with lows in the mid-upper 40s from the I-65 corridor and points west.
Convection increasing after 00Z as a warm frontal feature develops to the south and lifts into the region. Temperatures will be only slightly warmer than yesterday with plenty of cloud cover moving in with the disturbance out to the west. Models struggle in the next 24 hours with a classic warm front/warm sector and a single surface circulation. and focusing along the warm front lifting through the region. Northern progression of the warm front is still a bit of a problem in the forecast, though the most recent runs of the models have been fairly consistent in getting it invof the I-20 corridor. 75 range in the 03Z-09Z time frame with increasing mid level winds to support the potential for heavy rain to focus over the region along and just north of the warm front.
The shower activity will be diminishing throughout the day as a weak ridge of high pressure slides over the area.