Aikyam-Lab/Synoptic-Bench huggingface dataset:
422 PM PDT Wed Oct 19 2022 Updated Air Quality Issued section Dry and unseasonably warm conditions continue through the end of the week due to high pressure over the area. Expect temperatures to fall to below normal by the weekend as a trough of low pressure brings cooler air and precipitation to the area. High pressure over the region is providing another day of dry and unseasonably warm conditions over central California today, with high temperatures on track to top out around 10 degrees above normal.
623 PM CDT Wed Oct 19 2022 (This evening through Thursday) Taking a look at our current obs, we have cool temperatures in the low 60s with low dewpoints and light northerly winds under cloudless skies. A cooler and drier airmass is still settling into the area and there is a 1030 high centered over east TX that is headed our way. ) Thursdays highs will be in mid to upper 70s, Fridays highs will be in the low to mid 80s.
1225 AM CDT Thu Oct 20 2022 (This evening through Thursday) Subsidence continues to build over the CWA this afternoon as the mid/upper-level ridge over the Great Basin translates eastward. Near-neutral geopotential height tendencies are expected over the next 24 hours, and with increasing confluence along the upstream flank of a strengthening high-level jet streak over southeastern Texas, flow throughout the 700-300 mb layer should back to the northwest compared to the north today as the mid/upper-level ridges begins to de-amplify. This will cause the erosion of the stout subsidence inversion that is in place this afternoon over the CWA, with boundary-layer heights ascending to near 3-km AGL across areas west of the edge of the Caprock Escarpment while remaining nearly 1-km lower in the Rolling Plains, yielding high temperatures that will be 3-5 deg F warmer than today.
254 AM CDT Thu Oct 20 2022 The deep trough over the northeastern U.
215 AM EDT Thu Oct 20 2022 Cold high pressure will build into the region from the west through Friday.
(Today and tonight) Much of the region at 220 AM was running quite a bit warmer than 24 hours ago with Memphis leading the pack at +24 degrees thanks to steady westerly winds. Tonight, lee troughing emerges to our north underneath deeper westerly flow.
1127 PM CDT Wed Oct 19 2022 (This afternoon through Thursday night) A large upper level trough is dominating the eastern half of the country with West Texas and Southeast New Mexico on the western edge of the upper trough. Upper ridging develops over the area on Thursday. The warming trend continues on Thursday with highs mostly in the 70s and 80s except in the higher elevations of the mountains.
1236 AM CDT Thu Oct 20 2022 (Tonight through Thursday night) Clear skies over south Texas and northwesterly flow aloft will lead to another cooler than normal night with lows in the upper 40s to 50s. Quiet weather is on tap for Thursday as we remain on the lee side of an exiting trough with high pressure at the surface. Lows will be slightly warmer on Thursday night with inland areas dipping into the 50s while areas along the coast drop into the 60s.
334 AM CDT Thu Oct 20 2022 Key Messages: Key Messages: - Return to seasonal temperatures today, warmer this weekend - Two model solutions remain for late-weekend system WARMING UP INTO THE WEEKEND: The forecast remains on track for warm air advection to aid in the return of seasonable temperatures today.
952 PM MDT Wed Oct 19 2022 High pressure continues to dominate the Northern Rockies, keeping skies nearly clear across the state. The pattern will start to shift on Thursday, first bringing the peak of the ridge across the area. We will start to note the effects of the approaching system tomorrow, as winds will return to Wyoming normals, with gusts above 30 for the higher elevations and across the central WY wind corridor. Combining that with the warmer nd drier air will bring a critical fire weather threat Thursday afternoon, especially for the I-80 corridor.
In general, lows will not be nearly as cold as last night but still expect 30s area-wide with some pockets of freezing temperatures across northeast Oklahoma and northwest Arkansas in addition to the normal cold spots which may see another hard freeze.
1224 AM CDT Thu Oct 20 2022 (This evening through Friday) A strong upper level low continues to traverse across southern Canada bringing northwesterly flow aloft over Arkansas.
A light SW wind should keep locations west of the MS River above freezing overnight.
Tonight and Thursday WV imagery showed the large upper low still residing over southeast Ontario and southwest Quebec this afternoon. On Thursday, a weak ridge of high pressure will bring plenty of sunshine by mid-morning.
(Today through Friday) As the apex of the upper trough that brought this weeks cold front starts to slide east, an upper level ridge will move in behind it. Temps will start to respond to this today, with highs moderating into the low 70s.
215 AM EDT Thu Oct 20 2022 Dry and milder weather takes hold Thursday into the end of the week as high pressure takes hold. A few locations have reached freezing across the area, mainly in SE Ohio, but still struggling to fall below mid 30s at many airport locations at this hour.
(Today and tonight) Dry and pleasant weather will prevail the next 24 hours, as weak ridging aloft develops over the area into Friday. Skies will be mostly sunny today, with light winds and afternoon highs mainly in the lower 80s.
Deep upper trough remains centered over eastern Canada/Great Lakes region. There is a short wave trough moving southeast from the central Plains and Mississippi Valley early this morning and will move through the base of the eastern CONUS trough this afternoon and tonight. Moisture ahead of the trough is quite limited and well north of the Carolinas and Georgia. At the surface a dry pressure ridge dominates from the Gulf of Mexico northeast across the Carolinas. The low level flow will become southwest this afternoon with weak warm advection noted. So temperatures this afternoon should be a little warmer than yesterday in the low to mid 60s.
1128 PM CDT Wed Oct 19 2022 Very quiet weather to end the week as high pressure at the surface continues to move east of the region, and no other major systems set up over the Upper Midwest. Seasonal temperatures in the 50s are expected Thursday, and get even warmer on Friday with daytime highs in the 60s at most locations. The warm advection really ramps up over the weekend in response to a developing cyclone over the northern high plains.
(Today) After another cool start, including freezing temps in some of the valleys, the warming trend continues today. Westerly downslope flow off the deck will continue eastward expansion of the low level thermal ridge. Leaned toward warmer MOS/NBM 75th %ile for high temps.
1218 AM CDT Thu Oct 20 2022 (This evening through Thursday night) A large upper level trough continues to overtake much of the eastern CONUS with a ridge over the western CONUS. The large area of cold air that has impacted the combined Panhandles over the last couple of days, bringing below freezing morning lows to the northeastern FA, is continuing to move off to the east. Downsloping winds from the west today are also helping with the warmer temperatures. Overnight lows are expected to be much warmer with widespread 40s across the FA. Winds may be somewhat light this evening then pick back up a bit to help keep warmer temperatures mixed.
An upper-level trough persists across the eastern CONUS per recent water vapor imagery, with northerly to northwesterly flow in place over the Middle Mississippi Valley. This combined with the cloud cover will keep overnight lows 5-10 degrees warmer tonight compared to last night, though many locations will still see values approach or drop just below freezing. The eastern trough will mostly hold in place tomorrow, with upper- and mid-level flow remaining northerly to northwesterly. However, surface flow will remain out of the southwest, advecting warmer air into the CWA and bumping temperatures up to around climatological normals for afternoon highs. Guidance consensus is that the eastern trough will continue to push eastward on Friday and deamplify, with upper-level flow gradually becoming southwesterly through the day as another trough begins to dig across the western CONUS.
Tonight: Not much of consequence overnight although a lack of completely calm winds, low level WAA and perhaps periods of upper level clouds will keep temperatures warmer than this morning values. Thursday: Low level thermal push will allow for warmer conditions on Thursday. A strong upper level ridge moves into the area Friday which will even out the overall pattern over the weekend along with increase temperatures. The Euro and NAEFS ensembles continue to support warmer than normal temperatures over the next few days with temperature means in the 90th to 99th percentile.
High pressure building in with increasing heights over the next couple days will lead to warmer temperatures. The persistent upper-level trough that has been hanging just to our east funneling in cold air is finally moving off allowing for this warming trend. This will mean a noticeably warmer day tomorrow with highs in the mid 60s to low 70s, warmest over our western counties where the winds turn southerly earlier. Behind this front on Friday we will see a brief return to northwesterly flow as a dry cold front clips our northern counties. This will do little more than limit daytime highs for our northern counties to the low 70s while SE Nebraska reaches around 80 degrees during the afternoon.
A dry cold front will move southeast across the forecast area this afternoon. **** See Fire Weather Discussion below **** Will also keep Lake Wind Advisory in effect for Fort Peck Lake from noon through 9 pm today as west to NW winds 20 to 30 mph with gusts as high as 40 mph are expected along and behind the cold front this afternoon and early evening. The cold front will signal the start of a significant air mass change across the whole region, which will spread measurable precipitation through our area this weekend.
Overall, low impact weather is expected today as we transition toward a warmer and drier period of weather. Radar shows fairly widespread light to moderate precip rates that are struggling to saturate the lowest levels. The trough axis exits our area by 15z with mid-level flow backing westerly allowing for WAA that ramps up by late afternoon/evening. Upper level trough slides into the Intermountain West for the latter half of the weekend.
The current pattern with the upper trough over the eastern United States and the upper ridge across the western United States will gradually transition into a more zonal pattern across the country by Friday. The weekend will then feature a reversal in the pattern with a large upper level trough across the western United States and upper level ridging across the eastern United States.
Fortunately, these conditions wom't last very long as highs are expected to climb into the low to mid 70s by the afternoon, so wear layers, we are in Florida after all.
132 AM EDT Thu Oct 20 2022 Aviation -- Improving Weather Through Week's End -- Persistent deep upper trough responsible for our recent bout of chilly, windy fall weather will finally lift out of the region on Thursday.
1103 PM CDT Wed Oct 19 2022 (This evening through Thursday Night) It's been an all around gorgeous day across SE TX as high pressure remains overhead, with light north winds and observed afternoon temperatures in the mid to upper 60s thus far. This should prove for efficient radiative cooling, although overnight lows should be a few degrees higher given the loss of CAA behind the departed cold front. Nonetheless, most locations should again see low temperatures bottoming out in the upper 30s/40s, while coastal locations will see lows in the low to mid 50s. Daytime highs will reach the lower/mid 80s at most locations, while overnight lows will sit mainly in the 50s area-wide.
308 AM CDT Thu Oct 20 2022 High pressure over the Gulf Coast states today will set up across the Atlantic Coast down to the Gulf Coast by Friday. Given the degree of dry air, and the overall warmer than guidance bias for high temperatures in this drought regime, we are above guidance today and at or above for Friday. Southerly flow across the PAH forecast area will be bringing in warmer and more humid air.
High pressure will continue to deliver dry, sunny and seasonably warm weather to Arizona through Friday.
1246 AM CDT Thu Oct 20 2022 (This evening through Thursday) More quiet weather is expected over the next 36 hours as high pressure is in control across east and central Texas. Tomorrow, a weak cold front will push through west central Texas, but no rain is expected. A warmer airmass moving in from the west will help afternoon high temperatures reach the low 80s for most areas.
1104 PM MDT Wed Oct 19 2022 Deep trough persists over the eastern CONUS, with upper ridging over the west. Warm front has made it through the CWA. The cold front is progged to move through the region Thursday night, bringing highs down to the 60s on Friday. A trough is expected to deepen over the west coast this weekend.
205 AM EDT Thu Oct 20 2022 High pressure will cross the region today through Friday with dry weather and gradually warming temperatures.
High pressure centers over the Southern Appalachians tonight with light southerly winds and a mostly clear sky across Middle Tennessee. Some patchy frost will be possible across eastern portions of the forecast area within sheltered valleys along the Cumberland Plateau, but upper ridging and warmer temperatures arriving from the west will begin a warming trend. (Friday Night through next Thursday) The warming trends continues through the weekend with temperatures about 10 to 14 degrees above normal with dry weather beneath the upper ridge.
Cool start to the morning with a few clouds around will give way to a warmer day, still several degrees below climo, as temps rebound into the L-M70s, even a few U70s for the immediate Treasure Coast today. Upper troughing will still encompass the eastern CONUS, while the former cold frontal boundary remains hung up across the Bahamas with weak cyclogenesis over that area.
727 AM EDT Thu Oct 20 2022 The main theme for the rest of the week into the weekend will be warming temperatures as the trough responsible for the recent cold snap pulls north and east out of the area. Overcast sky and persistent wind have prevented widespread freezing conditions from developing through most of the night, but temps have dropped several degrees in the most recent hour at LNS, MUI, and several other sites. Building high pressure will result in diminishing winds tonight as well as skies clearing by daybreak.
932 AM EDT Thu Oct 20 2022 High pressure will cross the region today through Friday with dry weather and gradually warming temperatures.
A dry layer in the low, to mid level along with lack of column-instability will inhibit any pcpn with the disturbance. Temperature will remain about 10 degrees below average given the cool airmass/upr troughing. Cloud cover will diminish tonight as the disturbance exits and as the upr trough begings to fill. Lows for most areas look to be a few degrees above this mornings freezing temperature readings. A progression of warmer days is in store for the weekend as the upper-level low that brought cooler weather to the Upper Ohio Valley and Allegheny Mountains finally lifts off to the northeast and we transition into a pattern that will be characterized by troughing across the western CONUS and ridging across the east. By Friday, southwest winds in the lower troposphere will ramp up, first with a trough lifting across the Upper-Midwest.
308 AM MDT Thu Oct 20 2022 Current 500mb analysis shows an upper-level trough over the Great Lakes region with northerly flow over the High Plains. As the trough continues to move off towards the east, we fall under northwesterly flow aloft this afternoon and temperatures climb into the mid-70s to low-80s. Into Friday, zonal flow takes over as the upper-level ridge breaks down with a passing trough to our north through Canada and another developing over the Pacific Northwest early in the weekend.
Predawn temps ranged fm the 30s to the lower 40s. As this feature passes to the east of the region, the long wv upper trof over the eastern half of the nation wl also weaken and shift to the eastern seaboard. This wl allow upper ridging to build into the Mid-South heading into Fri.
Water vapor imagery highlights a deep cyclonic gyre over the eastern CONUS and the Gulf of Mexico, while yesterday's cold front is stalled over the Bahamas and Cuba. After overnight lows in the mid 60s, the island chain has recovered into the lower 70s.
628 AM CDT Thu Oct 20 2022 The deep trough over the northeastern U.
Another cold start this morning, under the influence of cold high pressure, but temperatures are rebounding quickly with CAE already up to 52 degrees under mostly sunny skies. Satellite imagery showing some cirrus moving into the area as some high level moisture rotates through the base of the upper trough.
619 AM CDT Thu Oct 20 2022 (Today and tonight) Dry and pleasant weather will prevail the next 24 hours, as weak ridging aloft develops over the area into Friday. Skies will be mostly sunny today, with light winds and afternoon highs mainly in the lower 80s.
Obs show some light SW winds remain at the surface, which is likely keeping some places above freezing as of 500 AM. With sunrise still a couple hours away, it's likely additional locations should dip below freezing with further cooling. Temps will top out about 10 degrees below average, with highs ranging from the mid 40s to the lower 50s. Lows Thursday night will generally be in the lower 30s. A progression of warmer days is in store for the weekend as the upper-level low that brought cooler weather to the Upper Ohio Valley and Allegheny Mountains finally lifts off to the northeast and we transition into a pattern that will be characterized by troughing across the western CONUS and ridging across the east. By Friday, southwest winds in the lower troposphere will ramp up, first with a trough lifting across the Upper-Midwest.
629 AM CDT Thu Oct 20 2022 (Today and tonight) Much of the region at 220 AM was running quite a bit warmer than 24 hours ago with Memphis leading the pack at +24 degrees thanks to steady westerly winds. Tonight, lee troughing emerges to our north underneath deeper westerly flow.
1030 AM EDT Thu Oct 20 2022 The main theme for the rest of the week into the weekend will be warming temperatures as the trough responsible for the recent cold snap pulls north and east out of the area. Bumped up sky cover for the early aftn, but kept the idea of less clouds in the SE as mid-level mstr over central mtns is still progged to move to the NE more so than E or SE as the trough to our west digs. Building high pressure will result in diminishing winds tonight as well as skies clearing by daybreak.
649 AM CDT Thu Oct 20 2022 Key Messages: - Return to seasonal temperatures today, warmer this weekend - Two model solutions remain for late-weekend system WARMING UP INTO THE WEEKEND: The forecast remains on track for warm air advection to aid in the return of seasonable temperatures today.
403 AM CDT Thu Oct 20 2022 Today and Tonight: Another cold start with near record lows around freezing and areas of frost is expected this morning. Clear skies and a near calm wind has allowed temperatures to drop to freezing at several locations and temperatures will drop several more degrees before rebounding under full insolation.
623 AM CDT Thu Oct 20 2022 Today and Tonight: Another cold start with near record lows around freezing and areas of frost is expected this morning. Clear skies and a near calm wind has allowed temperatures to drop to freezing at several locations and temperatures will drop several more degrees before rebounding under full insolation.
High pressure along the NW Gulf Coast States this evening will continue to expand eastward into Wed with drier/cooler conditions. High pressure with dry conditions continue. Cooler, drier airmass remains in place with high pressure over the area.
848 PM CST Tue Dec 31 2019 Latest satellite imagery is showing that the back edge of the low cloud have made it to the Mississippi River. Have trended toward the cooler guidance tonight. With ample insolation expected, have trended toward the warmer guidance. With southerly to southwest flow continuing Wed night, as well as cloud cover spreading north as the next system approaches, have trended warmer for Wed night. Will need to watch for freezing overnight as temps drop into the 20s. While trends have been cooler, going forecast may be too warm thru Sat. The operational ECMWF has an interesting solution for this entire system with a much stronger clipper which then develops into a cut off upper low.
Gusty west winds however made it feel quite a bit cooler. Another key feature is the upper level low off the coast of Baja California.
910 PM EST Tue Dec 31 2019 Snow showers will continue this evening with a crossing trough.
842 PM CST Tue Dec 31 2019 An area of low pressure that in part brought wet weather over this region a couple of days ago continued to move NE-ward over eastern Canada. This storm system exiting the continent, and high pressure building eastward from eastern Texas will continue a dry trend for the Tennessee Valley. As of 8 PM, some locations such as near Ft Payne have already cooled to near freezing, while other locations were in the upper 30s and lower 40s. Conditions will remain dry with warmer daytime highs reaching the lower 50s.
725 PM EST Tue Dec 31 2019 High pressure remains again on Wednesday, although with less wind to deal with.
Also made adjustment to low temperatures where some cooler air remains trapped in the Cascade valleys including Wenatchee. If the valley floor doesn't scrub out some freezing rain is possible and will continue to monitor trends over the next few hours.
936 PM EST Tue Dec 31 2019 Low pressure north of the Great Lakes will move east tonight with drier air and weak high pressure building in from the west early on Wednesday. This high pressure exits to the east later on Wednesday, with a return to southerly flow.
Temps will continue to fall overnight with most of the area seeing lows in the low 30s, with some upper 20s as well.
Besides the cloud deck, relatively tight pressure around an exiting upper low over the northeast United States will keep winds brisk at TRI with gusts to 15-18kts. Chattanooga Airport, TN 32 53 39 55 48 / 0 0 20 90 90 Knoxville McGhee Tyson Airport, TN 33 50 36 52 46 / 0 0 10 90 90 Oak Ridge, TN 32 49 36 51 45 / 0 0 10 90 100 Tri Cities Airport, TN 29 47 31 51 43 / 10 10 0 90 90.
Snow-free portions of the area may approach 40 degrees this afternoon, but areas with significant snow cover may struggle to even rise above freezing. Nevertheless, temperatures are forecast to be 5 to 10 degrees warmer than today, with highs in the upper 30s and 40s.
835 PM CST Tue Dec 31 2019 High pressure continues to build into the Mid-South this evening. Current temperatures are in the low to middle 50s.
831 PM EST Tue Dec 31 2019 Dry and seasonably cool high pressure across forecast area with high/low temperatures to be at normal or a few degrees below normal next 24 hours. Dry high pressure leading to VFR clear conditions through the period.
Increased moisture associated with a warm front will occur Thursday.
Low level southerly winds also is bringing up warmer air from the south with snow levels rising to 4000-5000 feet except the Methow Valley where a wintry mix of snow and freezing rain is occurring. Westerly flow and cold advection aloft should destabilize the lower atmosphere to get gusty winds to mix to the surface. The well mixed atmosphere will also promote mild temperatures with latest MOS numbers around Wenatchee and Ephrata in the low 50s which would be near record highs for New Year's Day.