Aikyam-Lab/Synoptic-Bench huggingface dataset:
1151 AM CST Sat Nov 7 2020 High pressure continues to the east of Arkansas providing a south and southeast surface flow over the state. Today Through Sunday Night A weakening closed upper low continues to meander south of AR over SE TX near the LA border. This upper low looks to continue to weaken through tonight. the closed upper low will weaken further and begin to shift east over time. a larger scale upper trough over the the WRN CONUS will be moving closer to AR.
213 PM CST Sat Nov 7 2020 An upper level trough is over the western part of the country with upper ridging over much of the east coast. Temperatures today may be a little cooler than yesterday due to the approaching upper trough to the west and an increase in low level moisture but generally expect highs to be in the 70s and 80s. There is a possibility of patchy fog late tonight into Sunday morning across the Lower Trans Pecos and central and eastern portions of the Permian Basin with the increase in low-level moisture. The upper trough to the west progresses further east on Sunday.
/Updated at 1042 AM CST Sat Nov 07 2020/ High pressure over the eastern coast will slowly weaken and move to the east through tomorrow. The flow that sets up is between the high pressure to the east and tropical system to the south. a weak upper low will move to the east towards the high pressure. the area is expected to be dry but overcast as the upper low brings a boundary towards the state. that boundary is moving to the northeast towards the high pressure on the east coast.
139 PM MST Sat Nov 7 2020 20z surface analysis had low over north central WY with warm front into north central SD. Behind the warm front, temperatures have rocketed into the 60s/70s. Water vapour matinee indicated upper trough across western north America bringing southwest flow aloft over the CWA. Effect of this trough the main concern. Tonight/Sunday, upper trough slides into the Rockies as several pieces of energy rotate through it.
Surface and upper level ridging will push to our east over the next couple of days, allowing broad, warm southwesterly flow to develop over the area.
1242 PM EST Sat Nov 7 2020 A large area of high pressure center southeast of the region will promote VFR conditions for the most part. Some backing of the low level flow to the south/southeast late tonight into Sunday will promote some minor fog development for I-94 terminals and perhaps KPTK as limited moisture shifts into area from Lake Erie as wind speeds settle to 5 knots or less. The impressive 588 dam ridge at 500 mb continues strengthening tonight into Sunday as it moves off the Mid-Atlantic coast.
A plume of moisture sandwiched between an upper low centered over eastern Texas and the upper high to our northeast will lift in our direction from Georgia through the day and clip our southwest.
High pressure remains situated over the eastern US. A weak upper-level trough is located over southeastern TX/western LA. A few light showers are possible this afternoon over northern MS as the trough tracks east-northeast. An upper low continues to spin over E TX/SW LA today.
A mid level ridge will build over South Texas today resulting in warm and dry conditions with highs in the low to mid 80s (3-5 degrees above normal). Weak easterly winds will gradually become southeast this afternoon as low pressure deepens in the Lee of the Rockies.
This moisture is being squeezed between an upper low over eastern Texas and the upper high over the Mid Atlantic.
226 PM CST Sat Nov 7 2020 The mid-Mississippi Valley remains situated between a broad upper ridge across the eastern CONUS and a cut-off low over California and Nevada.
White-Out Conditions Possible for Portions of NE Montana Sent an update this morning to include some mention of drizzle or freezing drizzle for a few hours this morning under this layer of fog and low clouds before things begin to clear out more from south to north later this morning. Places that see surface temperatures near or below freezing with an elevated warm nose per forecast soundings are at risk for a period of freezing rain Sunday morning especially.
Currently it doesn't appear as though the low cigs will be as widespread as what we experienced this morning. In the upper levels, a ridge is centered over the Mid Atlantic states. A trough remains over TX/LA. At the surface, high pressure is over the Southeast with easterly or northeasterly low level flow over the region.
Chattanooga Airport, TN 75 55 78 59 78 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 75 51 76 55 77 / 0 0 0 0 0 Oak Ridge, TN 75 52 75 55 76 / 0 0 0 0 0 Tri Cities Airport, TN 74 47 75 53 75 / 0 0 0 0 10.
For tonight, the surface boundary that currently lies from just south of Bemidji to the far southern Red River Valley will begin to lift northward again as a warm front. These winds will only increase on Sunday, especially along and south of the highway 2 corridor. By late Sunday afternoon, the warm front should have pushed northward through most of the FA, bringing temperatures in the 60s for most areas.
Models still indicate that the first accumulating snow for the lower valleys is still on track for this evening and Sunday.
Eta will be interacting with an upper level trough moving into the Gulf of Mexico making this system sort of a hybrid of tropical/subtropical.
1128 AM CST Sat Nov 7 2020 Continued warm temperatures today as southwesterly flow aloft persists due to an upper level trough moving eastward over the Intermountain West. Maximum speeds in this low level jet may reach up to 60 knots at H85 over eastern Nebraska according to the GFS. Surface wind speeds are enhanced by the low level jet and a surface pressure gradient between a high pressure system in northern New Mexico and a trough extending through the northern and central Plains. Precipitation chances return on Sunday ahead of a Pacific cold front.
1026 AM EST Sat Nov 7 2020 A ridge of high pressure will remain north of the Carolinas through the weekend with increasing onshore winds bringing a slight chance of showers, particularly on Sunday. Deep high pressure will become stronger to our north over the next 36 hours as Tropical Depression Eta in the Caribbean likely reattains Tropical Storm status. Descending air aloft within the ridge should keep conditions too dry and stable for more than an isolated shower today or tonight. Ridge moves east into the Atlantic, which increases the onshore flow, generally from the SSE. High pressure ridge continues to move eastward, which aids in the moistening of the atmospheric column.
1118 AM CST Sat Nov 7 2020 Increased amplification and expansion of a broad upper-level trough across the western CONUS is causing the ridge across the Mid- Mississippi Valley to slide east. A few members of the high-resolution guidance support this scenario, but my confidence is quite low in any development.
CD Chattanooga Airport, TN 55 78 59 78 61 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 51 76 55 77 57 / 0 0 0 0 0 Oak Ridge, TN 52 75 55 76 56 / 0 0 0 0 0 Tri Cities Airport, TN 47 75 53 75 56 / 0 0 0 10 10.
At the surface, high pressure remains firmly planted in the western Atlantic and eastern seaboard, ridging south into the southeastern states and maintaining a generally east to northeast low-level flow through the weekend. Isolated to widely-scattered shower and thunderstorm activity continues through this evening across portions of the Deep South and northern Gulf waters in association with the aforementioned upper trough. The upper trough pushes east of the area and dampens tonight into Sunday. As this occurs, north-northwest flow sets up aloft and subsidence on the backside of the trough clears out rain chances across the region. Temperatures trend a degree or two warmer through the weekend. Lows tonight remain in the low to mid 60s inland and upper 60s to around 70 along the coast.
Mid level ridge over South Texas will shift slowly eastward through Sunday as deep trough is carved out over the four corners region. Subsidence associated with this ridge will limit precipitation through the period and maintain slightly above normal temperatures. Expect more stratus than fog Sunday night as the low level jet strengthens in the central/southern plains. ESTOFs indicates good likelihood of minor tidal overflow during the high tide cycle the next few nights which would result in water levels reaching the dunes.
High temperatures to exceed most guidance and hedged warmer on Sunday as well.
307 PM CST Sat Nov 7 2020 Dry conditions and unseasonably warmer temperatures will continue through the remainder of the weekend. With a decent pressure gradient in place today, these southerly winds were gusting 25-35 mph which helped to push afternoon high temperatures into the low/mid 70s. This breezy southerly flow overnight into Sunday should keep low temperatures in the mid 50s tonight and Sunday highs into the low/mid 70s. Focus then shifts to the deepening mid-level trough over the western U.
335 PM CST Sat Nov 7 2020 Today and Tonight: A deep upper level trough is parked over the west coast at 500mb this afternoon. and ridging is over the eastern half of the CONUS aloft. An upper level disturbance/closed low at 500mb has been helping to provide a little bit of lift with some shower development along the coast and creeping into the southern portion of the forecast area today. This may be extended into the overnight as that low pushes westward into the lower Miss River Valley before getting absorbed back into the southwesterly flow from trough to ridge. the low will edge closer to the ArkLaMiss region, and have kept a slight chance for precip in the west as a result.
Temperatures could possibly remain even slightly warmer IF we are able to mix tonight as 850 temps around 10 to 15 degrees celsius, however confidence is low in this occurring. As a cold front passes through late Sunday there will be a chance for precipitation ahead of the front.
Breezy conditions with occasional showers will continue as Tropical Cyclone Eta moves across Cuba to near the Florida Keys by late Sunday. The pressure gradient will tighten between high pressure to the north and TC Eta to the south which will increase the onshore winds.
/EC/ Today and Tonight: A deep upper level trough is parked over the west coast at 500mb this afternoon. and ridging is over the eastern half of the CONUS aloft. An upper level disturbance/closed low at 500mb has been helping to provide a little bit of lift with some shower development along the coast and creeping into the southern portion of the forecast area today. This may be extended into the overnight as that low pushes westward into the lower Miss River Valley before getting absorbed back into the southwesterly flow from trough to ridge. the low will edge closer to the ArkLaMiss region, and have kept a slight chance for precip in the west as a result.
High pressure continues to build over eastern CONUS.
18Z RAOB sounding showed that some dry air has worked its way into the low and mid levels, brining the PWAT to near 2". After Eta moves across Cuba, it will undergo a westward movement due to an approaching upper level trough currently in the Gulf of Mexico.
The low cigs should scatter out by midday Sunday with a sct to bkn VFR deck thru the afternoon.
307 PM CST Sat Nov 7 2020 A mid to upper level low over SE TX/W LA has been producing an area of rain with a few thunderstorms across parts of south central Louisiana, extending out into the Gulf of Mexico. This system will be degenerating into just a trough later this evening.
/Updated at 1042 AM CST Sat Nov 07 2020/ High pressure over the eastern coast will slowly weaken and move to the east through tomorrow. The flow that sets up is between the high pressure to the east and tropical system to the south. a weak upper low will move to the east towards the high pressure. the area is expected to be dry but overcast as the upper low brings a boundary towards the state. that boundary is moving to the northeast towards the high pressure on the east coast. 24 /Updated at 0340 PM CST Sat Nov 07 2020/ No significant changes needed to the extended this afternoon, only minor adjustments to the low rain chances later in the week.
530 PM EST Sat Nov 7 2020 An unseasonably warm and dry weather pattern will continue across Central PA through early in the upcoming week as a large area of high pressure remains anchored over the Middle Atlantic Region.
439 PM CST Sat Nov 7 2020 A warm front that lifted across the area this morning is currently stalled out across far northern MN. This front is expected to resume its northward trek tonight as low pressure over North Dakota moves northward. A cold front associated with the low pressure system tracking north today will sweep across the region Sunday night.
412 PM MST Sat Nov 7 2020 20z surface analysis had low over north central WY with warm front into north central SD. Behind the warm front, temperatures have rocketed into the 60s/70s. Water vapour matinee indicated upper trough across western north America bringing southwest flow aloft over the CWA. Effect of this trough the main concern. Tonight/Sunday, upper trough slides into the Rockies as several pieces of energy rotate through it.
603 PM EST Sat Nov 7 2020 Clear skies with light south winds will prevail through the night as strong high pressure remains anchored across the central Appalachians and Mid Atlantic. The circulation around this high will provide the advection of some moisture centered in the 3500 to 5000 foot range from the Lower Tennessee Valley into Se Mi Sun afternoon. Plenty of dry air over the region will maintain clear mostly clear skies with only a few high cirrus clouds rounding the upper ridge through tonight. This impressive high pressure ridge strengthens slightly into Sunday while beginning to slide east into the Atlantic.
/issued 213 PM CST Sat Nov 7 2020/ An upper level trough is over the western part of the country with upper ridging over much of the east coast. Temperatures today may be a little cooler than yesterday due to the approaching upper trough to the west and an increase in low level moisture but generally expect highs to be in the 70s and 80s. There is a possibility of patchy fog late tonight into Sunday morning across the Lower Trans Pecos and central and eastern portions of the Permian Basin with the increase in low-level moisture. The upper trough to the west progresses further east on Sunday.
E OK and NW AR are in between systems with high pressure well to the east and low pressure across the northern Rockies.
Could get a few snow squalls with enhanced forcing along the cold front and quite steep low-lvl lapse rates.
Forecast mostly on track this evening with surface ridging in control. VFR conditions forecast through the period as surface ridging remains in control. SR Chattanooga Airport, TN 55 78 59 77 61 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 51 76 54 76 57 / 0 0 0 0 0 Oak Ridge, TN 52 75 54 76 56 / 0 0 0 0 0 Tri Cities Airport, TN 47 75 53 74 56 / 0 0 0 0 0.
315 PM CST Sat Nov 7 2020 A mid to upper level low over SE TX/W LA has been producing an area of rain with a few thunderstorms across parts of south central Louisiana, extending out into the Gulf of Mexico. This system will be degenerating into just a trough later this evening.
Some of the HREF members try to sneak in a few spotty shra during the day, but meager moisture availability and some narrow mid level ridging overhead should keep this quite isolated.
Dry conditions and unseasonably warmer temperatures will continue through the remainder of the weekend. With a decent pressure gradient in place today, these southerly winds were gusting 25-35 mph which helped to push afternoon high temperatures into the low/mid 70s. This breezy southerly flow overnight into Sunday should keep low temperatures in the mid 50s tonight and Sunday highs into the low/mid 70s. Focus then shifts to the deepening mid-level trough over the western U.
Between Phillips County and the Big Sheep Mountains, chose to keep the Winter Storm Warning for decent snowfall and good chances for freezing rain/sleet mix accumulations. For Prairie, Dawson, and Richland Counties, the Winter Storm Watch has been upgraded to a Winter Weather Advisory for a light glaze of freezing rain and snow up to 3 inches - mainly along the Big Sheep Mountains there.
953 PM EST Sat Nov 7 2020 An unseasonably warm and dry weather pattern will continue across Central PA through early in the upcoming week as a large area of high pressure remains anchored over the Middle Atlantic Region.
346 PM CST Sat Nov 7 2020 /Updated at 1042 AM CST Sat Nov 07 2020/ High pressure over the eastern coast will slowly weaken and move to the east through tomorrow. The flow that sets up is between the high pressure to the east and tropical system to the south. a weak upper low will move to the east towards the high pressure. the area is expected to be dry but overcast as the upper low brings a boundary towards the state. that boundary is moving to the northeast towards the high pressure on the east coast. 24 /Updated at 0340 PM CST Sat Nov 07 2020/ No significant changes needed to the extended this afternoon, only minor adjustments to the low rain chances later in the week.
525 PM CST Sat Nov 7 2020 00Z TAFS Scattered showers that have been moving from east to west around the periphery of an upper level low have begun to weaken over the last hour with the loss of daytime heating. The aforementioned upper low will continue to linger across the region through Sunday allowing for the redevelopment of isolated showers and thunderstorms Sunday afternoon. /issued 315 PM CST Sat Nov 7 2020/ A mid to upper level low over SE TX/W LA has been producing an area of rain with a few thunderstorms across parts of south central Louisiana, extending out into the Gulf of Mexico. This system will be degenerating into just a trough later this evening.
716 PM EST Sat Nov 7 2020 An unseasonably warm and dry weather pattern will continue across Central PA through early in the upcoming week as a large area of high pressure remains anchored over the Middle Atlantic Region.
Lows should be warmer with the southeasterly low level flow in place, dropping only into the upper 50s to around 60 degrees.
Lows will drop to the lower 70s across the interior and mid-upper 70s along the coast. As a high pressure over the mid-Atlantic states remains nearly in place and with Tropical Storm Eta south of Cuba, the pressure gradient will keep windy conditions across the local Atlantic waters.
131 AM EST Sun Nov 8 2020 High pressure northeast of the region will keep an easterly flow across the area.
Despite prevailing southerlies reinforcing modest moisture advection into central and portions of southwest Kansas, extremely dry air in the lower/mid levels will keep precip chances out of the forecast for much of western Kansas throughout the period. Little change to temperatures are expected today with gusty south winds reinforcing the warmer air mass across the high plains.
Aloft, a cutoff low has begun to phase into the flow of an incoming trough over the western CONUS progressing towards the central CONUS, with a ridge persisting over the northeastern CONUS.
/issued 905 PM CST Sat Nov 7 2020/ Clouds continue to spread into the Mid-South this evening thanks to an upper level low pressure system that is located over Louisiana. The clouds are keeping temperatures a tad warmer than previously thought. High pressure continues to build over eastern CONUS.
1148 PM EST Sat Nov 7 2020 Clear skies with light south winds will prevail through Sunday morning as strong high pressure remains anchored across the central Appalachians and Mid Atlantic. The circulation around this high will provide the advection of some moisture centered in the 3500 to 5000 foot range from the Lower Ohio Valley into Se Mi Sun afternoon. Plenty of dry air over the region will maintain clear mostly clear skies with only a few high cirrus clouds rounding the upper ridge through tonight. This impressive high pressure ridge strengthens slightly into Sunday while beginning to slide east into the Atlantic.
1144 PM CST Sat Nov 7 2020 A warm front that lifted across the area this morning is currently stalled out across far northern MN. This front is expected to resume its northward trek tonight as low pressure over North Dakota moves northward. A cold front associated with the low pressure system tracking north today will sweep across the region Sunday night.
106 AM MST Sun Nov 8 2020 Deep western CONUS trough continues to eject NE with an associated strong sfc cyclone. Main theta-e ridge will shift NE quickly through the region this morning, with a line of showers expected. Terrain influences will allow mix down of strong winds in the northern and eastern Black Hills foothills ahead of the sfc cold front. The strongest winds will then shift to NW SD behind the cold front where CAA/pressure rises will allow gusty winds.
Near record warmth will start the next work week, as high pressure keeps us dry for at least one more day.
An upper low continues to become sheared out as it drifts southeast through Lousiana.
946 PM PST Sat Nov 7 2020 Colder air moving in will bring light snow to the lower elevations of the ID Panhandle and Palouse on Sunday morning with dry conditions by the evening hours.
Added southern Meade County plains as well for the gusty winds behind the cold front. 20z surface analysis had low over north central WY with warm front into north central SD. Behind the warm front, temperatures have rocketed into the 60s/70s. Water vapour matinee indicated upper trough across western north America bringing southwest flow aloft over the CWA. Effect of this trough the main concern. Tonight/Sunday, upper trough slides into the Rockies as several pieces of energy rotate through it.
The low clouds will return tonight after midnight.
Temperatures will be a bit warmer than yesterday and once again flirt with record highs at KTRI. Overnight tonight conditions are expected to remain relatively persistent, with temperatures being a few degrees warmer because of the higher daytime temperatures.
/issued 525 PM CST Sat Nov 7 2020/ 00Z TAFS Scattered showers that have been moving from east to west around the periphery of an upper level low have begun to weaken over the last hour with the loss of daytime heating. The aforementioned upper low will continue to linger across the region through Sunday allowing for the redevelopment of isolated showers and thunderstorms Sunday afternoon. /issued 315 PM CST Sat Nov 7 2020/ A mid to upper level low over SE TX/W LA has been producing an area of rain with a few thunderstorms across parts of south central Louisiana, extending out into the Gulf of Mexico. This system will be degenerating into just a trough later this evening.
905 PM CST Sat Nov 7 2020 Clouds continue to spread into the Mid-South this evening thanks to an upper level low pressure system that is located over Louisiana. The clouds are keeping temperatures a tad warmer than previously thought. High pressure continues to build over eastern CONUS.
208 AM CST Sun Nov 8 2020 Southerly flow continues through the short term, gradually increasing ahead of a trough moving out of the western CONUS.
143 AM EST Sun Nov 8 2020 An unseasonably warm and dry weather pattern will continue across Central PA through early in the upcoming week as a large area of high pressure remains anchored over the Middle Atlantic Region.
The low cigs should scatter out by midday Sunday with a sct to bkn VFR deck thru the afternoon. E OK and NW AR are in between systems with high pressure well to the east and low pressure across the northern Rockies.
This produced speeds which were on the low side of the 500m AGL wind speed envelop. An inverted sfc trof should set up from KOGA-KANW for focus and chance showers and thunderstorms are in place across ncntl Nebraska. By Monday morning, temperatures could easily be cold enough for freezing precipitation across parts of southwest and ncntl Nebraska. The NAM shows a pronounced warm nose aloft supporting sleet or light freezing rain.