Aikyam-Lab/Synoptic-Bench huggingface dataset:
1108 PM CST Thu Nov 18 2021 Strong high pressure will move across the area through Friday with return flow setting up Friday night.
Substantial high cloud cover is streaming across northern Arizona this evening in response to a trough moving into the Pacific Northwest.
McD Chattanooga Airport, TN 52 34 56 42 60 / 0 0 0 0 40 Knoxville McGhee Tyson Airport, TN 50 30 57 38 59 / 0 0 0 0 50 Oak Ridge, TN 49 30 55 38 57 / 0 0 0 0 60 Tri Cities Airport, TN 46 27 55 33 56 / 0 0 0 0 40.
228 AM EST Fri Nov 19 2021 Pesky lower clouds across the northeastern half of the forecast area early this morning should begin to work their way east or dissipate as warmer air begins to move in aloft. Weak upper ridging will build into the area today, with high pressure moving in at the surface. Some high clouds will move across the ridge into the area during the afternoon. Surface winds will eventually become southeast, but these won't bring in a lot of warmer air. With sunshine today highs will only be in the lower and middle 40s.
Dry weather returns Friday afternoon and evening as high pressure builds.
934 PM MST Thu Nov 18 2021 While broad upper ridging overspreads the western CONUS, an upper trough approaches the east coast. However, no more than a wind shift and some clouds are expected with this trough.
Under clear skies and calm conditions this morning, we'll see temps drop into the mid 20s across the region with temps closer to the lower 20s farther north. Highs will remain seasonable in the lower 50s; however, due to drier and breezy conditions, caution is urged for those wanting to burn leaves today.
Incoming Pacific trough looks disorganized on latest IR satellite imagery. Generally VFR conditions as an upper ridge builds into the region.
Temps are cold enough for some of that moisture to freeze on bridges by those bodies of water, so drivers may encounter a few slick spots.
For the rest of the day the center of a dome of strong high pressure will move up the Ohio River Valley providing us with mostly sunny skies and light variable winds. Tonight the anticyclone will head toward the mid-Atlantic coast. With the increasing cloudcover and the center of the cold dome of high pressure well to our east, tonight won't be quite as cold as what we saw this morning.
230 AM CST Fri Nov 19 2021 A system and cold front that moved across the Tennessee Valley yesterday had moved well east of this area, now exiting the East Coast. A worry for the overnight is a potential for fog/freezing fog formation development in the predawn. With low temperatures cooling to and below freezing for most of the area, icing of some area roadways cannot be totally ruled out. High temperatures will only warm into the low/mid 50s despite plenty of sunshine. Lows should cool into the low/mid 30s with SE winds of 5-10 mph.
Surface lee troughing will allow for breezy southwesterly winds this afternoon. This will allow highs to warm back into the low/mid 60s this afternoon. This will help keep morning lows warmer with temps only dropping into the mid 30s/40s.
At this time, freezing fog potential remains low, but will continue to monitor. Overnight lows will likely hover at or below freezing, especially in the more rural areas of west TN.
221 AM EST Fri Nov 19 2021 A cold front will be offshore early today. Chilly high pressure will follow the front for Friday into the weekend.
135 AM EST Fri Nov 19 2021 A cold front will be offshore early today. Chilly high pressure will follow the front for Friday into the weekend.
225 AM CST Fri Nov 19 2021 The period of quiet weather continues for the next few days as a series of dry cold fronts push through the region keeping temperatures near average for this time of year.
Expect early morning temperatures to be in the mid 20s to low 30s, with most areas falling below freezing. A concern with this cooler trend is the patchy fog that has been reported across the area this evening. Drier air will filter in overnight with dew points in the low to mid 20s, gradually ending the potential for patchy fog. As temperatures drop below freezing around 3 AM, this may transition to patchy freezing fog. A cool, dry air mass will settle into the Tennessee Valley on Friday as high pressure builds into the area from the northwest. As a result, highs will struggle to climb out of the lower 50s in most locations.
1039 PM CST Thu Nov 18 2021 (This evening through Friday) The main concern in the short term forecast is the potential for near to below freezing temperatures across much of West Central Texas overnight. Dewpoints are forecast to generally remain in the teens, although they could creep back up into the lower 20s after midnight, mainly across our southern counties. If skies become mostly clear, freezing temperatures could be reached across even our southern counties, but if cloud cover lingers, it could keep overnight lows just above freezing. Farther north, a Freeze Warning remains in effect from midnight through 8 AM, where confidence is higher that freezing temperatures will be reached.
819 PM MST Thu Nov 18 2021 Westerly flow aloft and lee side surface troffing are yielding gusty SW winds along the foothills this evening. Livingston airport has been gusting to the lower 50s mph and this should continue for much of the night. With pre-frontal conditions, temperatures should be a little warmer tomorrow, with highs getting into the 50s.
200 AM EST Fri Nov 19 2021 A cold front will be offshore early today. Chilly high pressure will follow the front for Friday into the weekend.
Between the cirrus and south winds deterring radiational cooling, temperatures will not fall much further through sunrise, with most locations holding in the lower 30s.
Expecting the Coteau region to see the highest winds through mid-morning and have used higher end guidance wind speeds for the forecast.
Little change with more frost tomorrow early and then winds continue to veer toward SE as the high moves away. /Today through Saturday/ A freeze warning continues for a few hours over our I-20 corridor and points north with 29 in DeQueen the coldest, in fact freezing there before midnight. And likewise lots of blue sky and with lighter NE winds and abundant sunshine, we will be a little warmer today. So we can expect near freezing readings to mid 30s tonight with a hearty frost once again.
535 AM CST Fri Nov 19 2021 Chilly conditions will be in store across central Illinois today as high temperatures only reach the lower to middle 40s.
Surface temperatures generally above freezing Saturday morning so no travel problems are expected.
Once the sun comes up, we will warm into the 50s to low 60s in the southeast as high pressure builds into the region. Areas in the north and west will be the coolest, but most locations will remain just above freezing. A nice day is on tap for Saturday as well along with slightly warmer temperatures.
Northwest flow is transitioning to a more westerly flow aloft and in response low pressure is beginning to build over western ND, and and a deep dry layer will remain in place over the next several days. Signal is there for most locations to reach or exceed freezing and current consensus is temperatures near our above 40 in our west and south this afternoon.
At the surface, high pressure will pass to the north of the area. High temperatures today will warm into the low to mid 50s. Lows should cool into the low/mid 30s with SE winds of 5-10 mph.
Temps are cold enough for some of that moisture to freeze on bridges by those bodies of water, so drivers may encounter a few slick spots. Very dry high pressure will be in control today through Saturday. The center of high pressure will move to the east coast Saturday allowing warming south winds to develop across Tennessee.
Pesky lower clouds across the northeastern half of the forecast area early this morning should begin to work their way east or dissipate as warmer air begins to move in aloft. Weak upper ridging will build into the area today, with high pressure moving in at the surface. Some high clouds will move across the ridge into the area during the afternoon. Surface winds will eventually become southeast, but these won't bring in a lot of warmer air. With sunshine today highs will only be in the lower and middle 40s. Southerly winds on Saturday will bring in some warmer air as well as more moisture to the area. Weak impulses in the flow ahead of an approaching upper trough will bring more clouds.
Over the weekend an upper level low will be developing well west of northern Baja.
304 AM CST Fri Nov 19 2021 A weak, dry cold front will push through the forecast area today. The main feature with this cold front will be the warmer temperatures it brings. Really! There is actually a warm front pushing into the west early this morning. and the colder air arriving later this afternoon behind the front is warmer than the air over us yesterday. So yeah we will be warmer behind this cold front today than we were ahead of it yesterday. Highs today are expected to range from the lower 30s Turtle Mountains to the lower 50s southwest. High pressure then builds over the area tonight.
/Today through Saturday/ A freeze warning continues for a few hours over our I-20 corridor and points north with 29 in DeQueen the coldest, in fact freezing there before midnight. And likewise lots of blue sky and with lighter NE winds and abundant sunshine, we will be a little warmer today. So we can expect near freezing readings to mid 30s tonight with a hearty frost once again.
Current High Wind Warnings are looking on track based on observations, low and mid level gradients and 850/700 mb height differences between Craig and Casper, and with these height differences decreasing as the day progresses, the end times for the High Wind Warnings look decent. Maximum temperatures will be cooler in the wake of the associated cold frontal passage and with 700 mb temperatures near -7 Celsius. Definitely a colder night than the previous night in the wake of the cold front and with less cloud cover to insulate the atmosphere.
Heights rise and strong mid level WAA spreads into the Central Plains today ahead of a longwave trough in the Pacific Northwest.
There should be break in clouds with a period of sunny skies today and confidence is high that we see highs above freezing and the lower 40s from NBM in our south. Northwest flow is transitioning to a more westerly flow aloft and in response low pressure is beginning to build over western ND, and and a deep dry layer will remain in place over the next several days. Signal is there for most locations to reach or exceed freezing and current consensus is temperatures near our above 40 in our west and south this afternoon.
A system and cold front that moved across the Tennessee Valley yesterday had moved well east of this area, now exiting the East Coast. A worry for the overnight is a potential for fog/freezing fog formation development in the predawn. With low temperatures cooling to and below freezing for most of the area, icing of some area roadways cannot be totally ruled out. High temperatures will only warm into the low/mid 50s despite plenty of sunshine. Lows should cool into the low/mid 30s with SE winds of 5-10 mph.
424 AM MST Fri Nov 19 2021 Current surface map places trof across the western Dakotas.
615 AM EST Fri Nov 19 2021 A cold front will be offshore early today. Chilly high pressure will follow the front for Friday into the weekend.
534 AM CST Fri Nov 19 2021 High pressure continues over the area this morning. Today Through Saturday Night An upper trough of low pressure is over the east coast with a large weak ridge over the rest of the country. This ridge will shift east through the middle of the country today as an upper trough enters the Pacific Northwest. The ridge will quickly move east and the upper trough will enter the Plains Saturday night. High pressure and dry conditions will continue today and tonight.
Today Through Saturday Night An upper trough of low pressure is over the east coast with a large weak ridge over the rest of the country. This ridge will shift east through the middle of the country today as an upper trough enters the Pacific Northwest. The ridge will quickly move east and the upper trough will enter the Plains Saturday night. High pressure and dry conditions will continue today and tonight.
227 AM MST Fri Nov 19 2021 Current surface map places trof across the western Dakotas.
This high pressure system is forecast to retreat eastward today in response to rather progressive flow aloft and the rapid movement of the eastern NOAM upper trof into the western Atlantic. The result of the pattern shift to south- southwest low level flow and the aforementioned cloudiness is that temperatures won't be as cold tonight, and temperatures while warmer and climbing to above normal on Saturday, won't be as warm as they might be sans clouds.
However, where cloud cover takes hold (roughly east of the Grand Mesa to Craig), expect highs as much as 10 degrees cooler for Saturday.
Another weather system will bring more clouds and cooler temperatures by the Thanksgiving holiday.
Last of the lake effect will erode early this morning as the amplified trough swings to the east allowing high pressure to build into the region. Thermal trough aloft will take some time to exit east with 850mb temps in the negative single digits all day, meaning surface temps will remain cool today with highs around 40 expected. Westerly winds will become southwesterly as the high advances east, allowing for a period of weak warm air advection through the weekend.
This wave is weakening as it progresses eastward but it does phase with a cold front which moves into south central Montana later this evening. Today ahead of the front it will be warmer with increasing clouds with mountain shower activity beginning. Guidance has above freezing temperatures in the evening and some of the initial precipitation will be defeating the low dry layer. Biggest forecast challenge is precipitation type over the lower elevations and probabilistic guidance shows majority of precipitation will fall at Billings and Sheridan in the form of rain with some change over to snow before daybreak.
Most of the area should be below freezing at sunrise.
321 AM CST Fri Nov 19 2021 (Issued 321 AM CST Fri Nov 19 2021) Today through Saturday: High pressure is nosing into the area this morning from the west, with winds slowly decreasing. Winds will initially be light and variable this morning, but will start to increase from the south this afternoon as the high shifts east.
529 AM CST Fri Nov 19 2021 The period of quiet weather continues for the next few days as a series of dry cold fronts push through the region keeping temperatures near average for this time of year. Temperatures will generally range from the mid to upper 50s today and in the low to mid 60s on Saturday.
Have trended toward drier dewpoint temperatures through the period, with cooler, drier conditions persisting through the period. Atwell A deep longwave trough extending from the Great Lakes to the Gulf will translate across the eastern portion of the country through the first of the week.
Warm air advection with 850mb temperatures in the 8 C to 12 C range on today will help support warmer surface temperatures as well. A weak upper level trough will move across South Dakota and northern Nebraska on Saturday afternoon. With this trough, some cooler temperatures are expected. While cooler than today (Friday), these highs are normal for this time of year. In addition to a cooler airmass, have inserted some very low slight chance PoPs into the forecast for late Saturday morning as the trough pushes into the area.
With the wAA, max daytime temperatures will return to the seasonable low 40s for most with overnight temperatures in the low 30s thanks to insulating clouds.
Saturday will be dry with moderating temperature as high pressure crosses. Snow shower coverage will decrease this morning with the passage of the 850mb thermal trough and with falling inversion heights.
For the rest of the day the center of a dome of strong high pressure will move up the Ohio River Valley providing us with mostly sunny skies and light variable winds. Tonight the anticyclone will head toward the mid-Atlantic coast. With the increasing cloudcover and the center of the cold dome of high pressure well to our east, tonight won't be quite as cold as what we saw this morning. Even as the Lower Ohio Valley remains dry, high level moisture from the Pacific will keep cirrus in place, but temperatures still climb to near normal for this time of year as highs climb into the mid to upper 50s.
Saturday will be dry with moderating temperature as high pressure crosses. Vorticity advection associated with departing low pressure has resulted in lake enhanced snow showers this morning as lake surface temperature still sits at nearly 60 degrees (15C), and 850 temperature is -9C. These snow showers will continue to be possible until the low propagates far enough east, which should occur later this morning and early afternoon.
/issued 340 AM EST Fri Nov 19 2021/ A weakening front will move into the region today and eventually dissipate on Saturday as high pressure to the north builds south setting up an increasing northeasterly flow. With the front in the vicinity and northeast winds continuing to bring Atlantic moisture westward we will see a few showers here and there through the day with the highest PoPs over the eastern half of the Florida peninsula. This pattern will persist through much of the weekend as the high across the eastern U.
901 AM EST Fri Nov 19 2021 High pressure and dry conditions are expected today. Have trended toward drier dewpoint temperatures through the period, with cooler, drier conditions persisting through the period. Atwell A deep longwave trough extending from the Great Lakes to the Gulf will translate across the eastern portion of the country through the first of the week.
552 AM CST Fri Nov 19 2021 Updated for 12Z aviation discussion 12Z TAF discussion: VFR through the forecast as high pressure builds into the region. LLWS in the wake of the cold front this morning. High pressure is building into the region behind the cold front that pushed much cooler temperatures into the region.
530 AM CST Fri Nov 19 2021 High pressure is building into the region behind the cold front that pushed much cooler temperatures into the region.
Today will be warmer, with most northern and central New Mexico locales reaching above normal.
312 AM CST Fri Nov 19 2021 Chilly conditions will be in store across central Illinois today as high temperatures only reach the lower to middle 40s.
RAH (Issued 321 AM CST Fri Nov 19 2021) Today through Saturday: High pressure is nosing into the area this morning from the west, with winds slowly decreasing. Winds will initially be light and variable this morning, but will start to increase from the south this afternoon as the high shifts east.
VFR conditions for this TAF cycle as high pressure starts to take over across the region.
A cold front will push through the area overnight and this will provide a brief period of upslope flow to enhance precipitation chances. The cold front tonight will not be tremendously strong, so Saturday highs will not be a whole lot cooler compared to today. In fact, high temperatures may end up warmer, with west low level winds increasing.
Other than a few spots, the gusts had died off to the west of the Valley as the next warm front approaches. There should be break in clouds with a period of sunny skies today and confidence is high that we see highs above freezing and the lower 40s from NBM in our south. Northwest flow is transitioning to a more westerly flow aloft and in response low pressure is beginning to build over western ND, and and a deep dry layer will remain in place over the next several days. Signal is there for most locations to reach or exceed freezing and current consensus is temperatures near our above 40 in our west and south this afternoon.
1056 AM MST Fri Nov 19 2021 Current surface map places trof across the western Dakotas.
221 PM CST Fri Nov 19 2021 Early this afternoon, temperatures ranged from the upper 30s in north central Illinois, to the low 40s across southern Iowa. At the surface, high pressure was centered east of the area and winds were out of the south/southeast. Tonight, the high clouds should keep the area warmer especially given WAA into our area. Have changed lows little from the overnight, but did pull them down a couple degrees as we seem to be on the high end of guidance.
Winds will remain elevated on the southside of continental high pressure situated along the southern Appalachians.
1051 AM CST Fri Nov 19 2021 Chilly conditions will be in store across central Illinois today as high temperatures only reach the lower to middle 40s.
Clear skies and light winds tonight will keep lows right around freezing across most of the area.
Clouds associated with a surface pressure trough have been moving into the area this afternoon and will continue to do so with skies becoming mostly cloudy later this evening. The clouds will help to keep tonight's lows a bit warmer with temperatures in the lower 30s across the area. Winds behind the high have become southerly which will continue to advect warmer air into the area aloft and allow temperatures Saturday afternoon to top out in the upper 40s to around 50 degrees. However, the tight pressure gradient behind the high and ahead of the pressure trough will cause winds to increase through the night tonight and continue to be breezy through the day on Saturday.
/Issued 901 AM EST Fri Nov 19 2021/ High pressure and dry conditions are expected today. Have trended toward drier dewpoint temperatures through the period, with cooler, drier conditions persisting through the period. Atwell A deep longwave trough extending from the Great Lakes to the Gulf will translate across the eastern portion of the country through the first of the week.
Saturday will see some slightly warmer temperatures start to filter into the area as southerly winds return to the area. The low level southerly flow will keep overnight temperatures above normal with lows dropping into the lower to mid 50s across the region.
A surface warm front will continue to move across the state from west to east through the afternoon, giving way to mild highs ranging from the lower 30s over the eastern Turtle Mountains to a few mid 50s over portions of the far southwest. A weak cold front will follow the warm front late this afternoon and tonight. Behind the weak front, highs will be a little cooler than today but still around normal to slightly above normal, mainly in the mid 30s to mid 40s. A stronger cold front approaches the northwest Saturday evening, increasing clouds from west to east overnight. Lows will be chilly Saturday night, dipping into the upper single digits north to the upper teens south with winds on the increase out of the northwest as arctic high pressure starts to nudge in behind the frontal passage.
As it does so, a developing cold front approaches from the west.
Temperatures have warmed in this dry airmass into the low to mid 50s early this afternoon. There is a low amplitude ridge located to the west of the area. At the surface, high pressure is centered to the north of the area and will continue to shift to the east overnight. These winds may prevent ideal radiational cooling conditions but skies will be clear and expect lows will drop down into the low to mid 30s. Southerly flow returns quickly on Saturday as the low-level ridge shifts off to the east.
Temperatures on Saturday will be similar to today, but it should feel a bit warmer with the lighter winds.
Below freezing temperatures again tonight with temperatures 5 degrees below normal. Quiet forecast period ahead as high pressure is in place. Clear skies tonight will lead to another night with below freezing temperatures. Temperatures slightly warmer tomorrow as the high shifts east and the flow becomes southwest.
204 PM EST Fri Nov 19 2021 Chilly high pressure will remain over the region through this weekend.