Aikyam-Lab/Synoptic-Bench huggingface dataset:
824 AM EDT Sun Apr 30 2017 Warm this afternoon with isolated showers possible along the ridges and north of I-80. A cold front will bring widespread precipitation on Monday. 500mb ridge will be well entrenched across the area and warm air will stream rapidly northward. An isolated shower or thunderstorm is possible in the ridges and far north with differential heating. Will lean more toward a slower solution since the path of the upper level low is more toward the north on Monday and the trough axis will really not show much of an easterly swing until Monday afternoon.
A cold front will bring widespread precipitation on Monday. 500mb ridge will be well entrenched across the area and warm air will stream rapidly northward. Will lean more toward a slower solution since the path of the upper level low is more toward the north on Monday and the trough axis will really not show much of an easterly swing until Monday afternoon.
/issued 340 AM CDT Sun Apr 30 2017/ Unseasonably strong upper level low pressure over the eastern Texas Panhandle this morning will move into southeast Kansas later today, deepening by another 100 meters at the 500 millibar level.
Big changes set to occur this period as a cold front moves slowly across the region.
1009 AM EDT Sun Apr 30 2017 High pressure ridging into the forecast area from the Atlantic will dominate through today. Strong heating may help support afternoon thunderstorms but these should be isolated because of the ridging and shallow moisture. An approaching cold front tonight will be in the forecast area Monday.
642 AM CDT Sun Apr 30 2017 The cold front is still in western Arkansas this morning.
Powerhouse upper level low currently located over SE Kansas at this time and forecast to finally lift out to the NE with drier air undercutting the departing system. (ISSUED 642 AM CDT Sun Apr 30 2017 ) The cold front is still in western Arkansas this morning.
High pressure and weak offshore flow have brought clear skies to the area. The coasts will cool some due to the early seabreeze and the vlys likely be at least as warm as ydy or maybe a little warmer due to a warmer airmass. The interior will for sure be warmer. The upper level ridge actually strengthens a touch and the interior will see further warming.
1115 AM CDT Sun Apr 30 2017 Regional 88Ds show the strongest convection/heaviest rains associated with the cold front have mostly moved east of the forecast area with just lingering mainly light/sometimes moderate shower activity noted over lower Acadiana. until then, as the mid/upper-level low gradually moves into the lower Mississippi Valley, could see enough weak lift to produce patchy very light showers from time to time. Main concerns are thunderstorms ahead of front which is moving into the lower Acadiana region. High pressure will build over the area tonight and Monday. Cooler and drier weather is expected with low temperatures possibly dropping into the 40s across east Texas and central Louisiana.
Short wave trough riding atop the upper ridging in EPAC will weaken as it pushes through the PacNW today and into the Great Basin tonight.
WWR/GAG TAF comments: Latest radar mosaic has precipitation just to the west across the Panhandles wrapping around the west side of a deep cyclone. /issued 325 AM CDT Sun Apr 30 2017/ Large closed upper low will transit northwest Oklahoma today with some lingering showers and some light snow across portions of northern Oklahoma today.
Strong high pressure aloft will finally reach the area for the latter half of the week. One such feature will arrive tonight and push a shallow cold front through Utah into tomorrow and will be accompanied by some weak showers across northern and central Utah. Updated the forecast to expire the Hard Freeze Warning as temperatures have now risen above freezing areas that were under the Warning.
/12Z TAFS/ Isolated showers and thunderstorms behind the cold front have ended at all sites, but VCTS has been carried at AUS through 1215 UTC as the last few storms pass southeast of its terminal. Today's main aviation impact will be west-northwest winds gusting to 25 knots for the morning and early afternoon until the pressure gradient relaxes later this afternoon and winds become relatively calm tonight as high pressure moves overhead. Showers and thunderstorms with the strongest producing small hail continued ahead of an upper level trough axis early this morning.
This combined with slightly cooler low-level temperatures will keep us a few degrees cooler than yesterday, although still likely reaching the lower 90s.
519 AM MDT Sun Apr 30 2017 Upper level analysis has large closed low over the central and southern Plains with weak ridging over the great basin area. Skies are mostly clear across much of the northern Plains, with the exception of the cloud shield on the northern end of the upper low across eastern South Dakota. At the surface, high pressure is located across the Dakotas. As the upper low/trof shift east of the area, fast northwest flow will take over across the northern Plains.
A chance for showers and possibly a few thunderstorms will linger into the afternoon until the cold front ushers in drier air from west to east. /NF/ Today through Tonight, Today's focus remains on the potential for severe weather and heavy rainfall, as a deep low pressure system sweeps through the central CONUS. A line of thunderstorms - focused mainly along an advancing cold front - will continue marching eastward throughout the day today.
A cold front will bring widespread precipitation on Monday, followed by much cooler temperatures through late week. An isolated shower or thunderstorm is possible in the ridges and far north with differential heating, and an outflow boundary across southern Ohio may be able to impact areas toward zanesville as well. Will lean more toward a slower solution since the path of the upper level low is more toward the north on Monday and the trough axis will really not show much of an easterly swing until Monday afternoon.
High pressure is building behind the weak cold front. Wind advisories were also issued for the Eastern Columbia River Gorge, the Simcoe Highlands, and the Oregon portion of the Lower Columbia Basin. the winds will likely meet advisory criteria across the Eastern Columbia River Gorge and in the higher elevations of the Simcoe Highlands. Confidence that winds will meet advisory criteria isn't quite as high for the Lower Columbia Basin but will keep for now and monitor the winds. Eastern WA/OR will be on the east side of the high pressure ridge tonight and under a dry northwest flow aloft. Winds will increase quickly and significantly later this morning (15- 18z) behind a departing cold front.
525 AM MDT Sun Apr 30 2017 Mid-upper low is centered near the OK/TX Panhandles with plume of deep moist flow around the northern and western extend.
The front exits the region early Monday with brief ridging expected Monday afternoon.
The short-term forecast for mostly sunny skies and warmer temperatures today remains on track.
Temperatures will be several degrees cooler than yesterday due to cloud cover. Chattanooga Airport, TN 87 63 73 53 / 20 100 60 10 Knoxville McGhee Tyson Airport, TN 88 66 73 50 / 20 60 70 10 Oak Ridge, TN 88 64 72 50 / 20 70 70 10 Tri Cities Airport, TN 86 66 73 48 / 20 30 60 10.
Temperatures are in the lower 80s. In the low to mid levels of atmosphere, a large area of high pressure will be centered over the Western Atlantic Ocean, east of the Carolinas, this afternoon. In the upper levels of the atmosphere, a ridge of high pressure will be located just east of the Florida peninsula today.
704 PM EST Thu Feb 8 2018 A warm front lifting up through the region Friday into Friday night will bring accumulating light snow to most of the area. The above mentioned warm front will then drop south and gradually washout out over the region during this period. Freezing precipitation is is also possible but not the most likely scenario therefore kept with rain/snow.
1024 PM EST Thu Feb 8 2018 High pressure overhead tonight shifts offshore Friday morning. 1033 MB area of High pressure is passing overhead and will slide to off the mid-Atlantic coast Friday morning. A warm front lifts northward across the Ohio Valley-Central Appalachians Friday but clouds will be mainly confined to our north, our forecast rain/snow free. Look for highs from the mid to upper 40s along the higher elevations of the Blue Ridge and Alleghanys, to lower to mid 50s elsewhere. A cold front is expected to move into, and then stall over the region during the weekend.
/issued 314 PM CST Thu Feb 8 2018/ SHORT TERM (Now through Friday night):Mid-level low pressure system continues to sit over Baja California with broad troughing over the eastern U. In the low levels, southerly winds are bringing warm, moist air over a much cooler air mass at the surface. Therefore, overcast skies and patchy drizzle will continue this afternoon and tonight with the best chances of accumulation being along the coast and over the marine areas with coastal troughing expected to strengthen. Overcast skies will continue, but temperatures should rise into the upper 60s as surface winds advect warmer air out of the southeast.
308 PM PST Thu Feb 8 2018 High pressure weakens slightly Friday through the weekend and the onshore flow should bring back more coastal clouds and fog.
/issued 322 PM CST Thu Feb 8 2018/ Synoptic pattern late this aftn was composed of UA ridging across the western CONUS, UA troughing across the Great Lakes region, and thus dry west-northwest flow aloft across the Four-State Region. Warm moist air running atop of a cooler and moist airmass will result in an overrunning scenario and thus, the development of isolated to scattered rain showers. Tomorrow night, an UA trough across the Pacific northwest will dig east-southeast to near the Four-Corners Region and promote sharpening southwest flow aloft.
600 PM EST Thu Feb 8 2018 High pressure overhead tonight shifts offshore Friday morning. High pressure will slide from the central Appalachians to off the mid-Atlantic coast through Friday morning. A warm front lifts northward across the Ohio Valley-Central Appalachians Friday but will be rain-free with only some mid-high clouds arriving across the northern half of our forecast area. Surface wind flow turns southerly but some residual coolness from the high offshore may limit temp rises, though highs will still be around 5 degrees above normal. Look for highs from the mid to upper 40s along the higher elevations of the Blue Ridge and Alleghanys, to lower to mid 50s elsewhere. A cold front is expected to move into, and then stall over the region during the weekend.
High pressure will skirt across the area over the next 24 hours, providing mostly clear skies and light winds.
Tonight will be mild with continued cloud cover and windy over the mountains and foothills, gusting to 75 mph over the ridges. Tonight through tomorrow there will be a chance of snow over the northern mountains progressing south for the higher terrain. Increasing low level moisture will bring persistent cloud cover, gusty northeast winds, and the possibility of freezing drizzle for the northeastern plains, with the exception of the Palmer Divide region. Models indicate the cold air will mix with warmer layers above, but this is believed to be unrealistic as winds with the incoming front will be running into the higher terrain and pooling.
Overnight, this ridge will slide east off the Mid- Atlantic coast and will help low level winds to veer and become south and eventually southwesterly and allow moisture to return off the Gulf of Mexico. There's good model agreement that the coastal baroclinic zone will lift north as a warm front Friday afternoon and bring an increasing chance for showers along the advancing boundary. 3" behind the warm front and combine with confluent deep moist southwesterly southern stream flow and broad CONUS troughing to help keep shower activity around through the afternoon. The subtropical ridge will slowly edge westward toward the Gulf of Mexico, while a ridge persists just off the West Coast, and a trough gets squeezed between them and cuts off over the southwestern U.
/issued 427 PM CST Thu Feb 8 2018/ The latest WV imagery and UA analysis shows a broad trough over the eastern CONUS. This has kept light to moderate east to northeast winds over the region, and mostly sunny/partly cloudy skies have allowed temps to warm into the lower to middle 60s. The combination of these processes will keep temperatures from falling too much tonight, with overnight lows expected to be at least 10 degrees warmer than this morning, ranging from the lower 40s in central LA to around 50 acrs the southern zones. Rain chcs will return to the area Friday as the old frontal boundary over the Gulf begins to lift north as a warm front. Shower chcs will increase through the day as warmer gulf air spreads north allowing temperatures to warm into the upper 60s/near 70.
Temperatures will fall rapidly this evening as a cold front advances further through Southwest Montana.
940 PM EST Thu Feb 8 2018 High pressure will continue to move east of the region tonight.
Overnight, this ridge will slide east off the Mid-Atlantic coast and will help low level winds to veer and become south and eventually southwesterly and allow moisture to return off the Gulf of Mexico. There's good model agreement that the coastal baroclinic zone will lift north as a warm front Friday afternoon and bring an increasing chance for showers along the advancing boundary. 3" behind the warm front and combine with confluent deep moist southwesterly southern stream flow and broad CONUS troughing to help keep shower activity around through the afternoon. The subtropical ridge will slowly edge westward toward the Gulf of Mexico, while a ridge persists just off the West Coast, and a trough gets squeezed between them and cuts off over the southwestern U.
840 PM EST Thu Feb 8 2018 High pressure will shift offshore Friday morning.
Northwesterly flow aloft prevails across the Interior West this evening, downstream from an amplified upper ridge centered off the Pacific Coast.
A weak coastal trough is expected to develop overnight. Minor changes to the low 20-30 percent rain chance to delay showers a bit.
545 PM CST Thu Feb 8 2018 For the 00Z TAFs, a cold front will move slowly southwest across the terminal sites on Friday, with winds becoming northeast.
634 PM EST Thu Feb 8 2018 High pressure tonight and Friday. A warm front will produce considerable mid to high clouds across the region tonight, making low temperatures a bit tricky. The warm frontal clouds will persist on Friday over central and northern portions of the forecast area. Dry air in the low levels should help prevent precipitation from reaching the ground, but can't rule out a few flakes making it to the ground across the northern counties.
/issued 343 PM CST Thu Feb 8 2018/ After a nice day today, we should see one more tomorrow afternoon as a westerly wind develops ahead of the next cold front to move across the area. The west wind will help to boost highs a few degrees over today across the southern half of the forecast area, but the northern half will depend on when the first push of the cold front will arrive.
We are still looking at the highest snowfall rates will be between midnight and 6 am. Tonight the low level jet will ramp up across Illinois, tightening up the baroclinic zone along the Wisconsin/Illinois state line, and providing strong warm air advection.
921 PM EST Thu Feb 8 2018 Dry high pressure will ridge into the forecast area from the north through tonight. Moisture will increase again Friday ahead of a warm front.
Strong cold front will move in tomorrow. Lee side troughing will increase and westerly sfc flow will remain steady across most of the plains tonight. Most all of the plains will remain above freezing, with the coldest spots across Kiowa and Prowers counties (20s). By sunrise, the first of two cold fronts will likely extend across or just on the south side of the Palmer Divide.
613 PM EST Thu Feb 8 2018 Dry high pressure will ridge into the forecast area from the north through tonight. Moisture will increase again Friday ahead of a warm front.
High pressure centered over the eastern Pacific will continue to provide unseasonably warm temperatures and dry conditions through Friday. The high pressure ridge centered over the Eastern Pacific continues to be the predominant weather feature for the short term as a dry and unseasonably warm airmass prevails across our area. WRF indicating the ridge will amplify and retrograde westward Friday through the weekend.
Northeast to east winds were observed in the lowest levels, while west to west-southwest flow prevailed throughout the sounding above 850 mb. A warm front will move north across the forecast area on Friday this will give a chance for a few showers Friday.
1044 PM EST Thu Feb 8 2018 High pressure will build north of the area tonight and gradually slide offshore Friday.
704 PM EST Thu Feb 8 2018 High pressure will continue to move east of the region tonight.
A warm front will move north across the forecast area on Friday this will give a chance for a few showers Friday.
427 PM CST Thu Feb 8 2018 The latest WV imagery and UA analysis shows a broad trough over the eastern CONUS. This has kept light to moderate east to northeast winds over the region, and mostly sunny/partly cloudy skies have allowed temps to warm into the lower to middle 60s. The combination of these processes will keep temperatures from falling too much tonight, with overnight lows expected to be at least 10 degrees warmer than this morning, ranging from the lower 40s in central LA to around 50 acrs the southern zones. Rain chcs will return to the area Friday as the old frontal boundary over the Gulf begins to lift north as a warm front. Shower chcs will increase through the day as warmer gulf air spreads north allowing temperatures to warm into the upper 60s/near 70.
Winds will weaken after 15Z most terminals ahead of strong cold front, which will move over northern Oklahoma terminals 15-18Z and central Oklahoma terminals near end of this forecast switching winds to northerly. /issued 307 PM CST Thu Feb 8 2018/ A south wind will remain somewhat breezy tonight, which will result in warmer and more uniform overnight low temperatures that last night. The temperature forecast for Friday will be rather tricky as a strong cold front is expected to move across Oklahoma and north Texas.
High pressure over the eastern Pacific and west coast bringing fair and unseasonably warm conditions today.
950 PM EST Thu Feb 8 2018 A warm front lifting up through the region Friday into Friday night will bring accumulating light snow to most of the area. Hourly Temperatures adjusted up due to the cloud cover but should still fall late tonight before the clouds with the warm front. The above mentioned warm front will then drop south and gradually washout out over the region during this period. Freezing precipitation is is also possible but not the most likely scenario therefore kept with rain/snow.
Coastal trough will approach the coast during the day. Rain chances will increase in the afternoon into Friday evening as the short wave trough moves into northeast Mexico. Coastal trough will move into the coastal waters Friday morning with areas of light drizzle/MVFR vsbys over the coastal plains with IFR ceilings expected. Isolated to scattered showers will be possible over the coastal plains in the afternoon as the coastal trough moves inland.
815 PM EST Thu Feb 8 2018 Dry high pressure will ridge into the forecast area from the north through tonight. Moisture will increase again Friday ahead of a warm front.
600 PM CST Thu Feb 8 2018 Very little change in expectations the remainder of the night from the previous forecast as Arctic high pressure builds in tonight, forcing the low level baroclinic zone and the associated band of snow across western and south central North Dakota as of 00 UTC south through the late evening and overnight. Very cold low temperatures expected again tonight and utilized some of the lower guidance. Another wave propagating through the deep upper trough does clip the far southwest.
840 PM MST Thu Feb 8 2018 High pressure will continue to hold in place the remainder of the week resulting in above normal daytime high temperatures.
Both the evening Cape sounding and wind profilers indicate a thin post-frontal airmass overtop the area, with cooler northeast flow extending up through 2500-3000 feet. Any cooling and drying that has taken place will be short lived as high pressure over the mid-Atlantic transitions seaward and causes low-level winds to veer to the east and east- southeast by daybreak.
Rain chances to increase tomorrow/ tomorrow night as deeper moisture returns from the Gulf along with a warm front.
528 PM EST Thu Feb 8 2018 High pressure will shift offshore Friday morning.
The PAH forecast area will remain dry through Friday as high pressure continues to push off to our east. Models continue to bring a cold front south across our region Friday night, and linger it just southeast of our region through the weekend. Moisture moving northward, along with areas of low pressure moving along the front, will keep us in a wet pattern.
Temperatures expected to be cooler tomorrow as the main effect from the trough passing by. Temperatures appear to be on track for tonight, with a weak surge of cold air in the ID-MT border region, and warmer farther south due to cloud cover and wind continuing. For Fri afternoon, highs are close to current NAM-MOS, mainly erring on the side of being slightly cooler in the central ID mountains, slightly warmer in the Snake River plain.
High pressure spreads thoughout the Great Lakes and Upper Ohio Valley. This high will gradually move eastward over the northeast U.
and even there expect only an isolated shower or thunderstorms as high pressure ridge settles over the area at 500mb. Hot temperatures expected once again tomorrow with similar highs to today, just a degree or so warmer in some areas.
303 PM CDT Tue Jul 25 2017 A cold front will make it's way south into northwest Nebraska this evening, with the front through most of the forecast area of western and north central Nebraska by Wednesday morning. The big story will be the much cooler temperatures Wednesday, with highs in the lower to mid 80s. Western CONUS ridge will be in process of building Wednesday into Wednesday night and will extend from the Four Corners region- Southern Plains into the western Canadian Prairies at the start of the period.
333 PM EDT Tue Jul 25 2017 High pressure will extend across the area through Wednesday.
359 PM EDT Tue Jul 25 2017 High pressure was passing by to our north today behind the cold front which passed through. However, an upper level trough will begin to deepen over the Great Lakes and New England, allowing another cold front to drop south.
152 PM EDT Tue Jul 25 2017 An upper level trough will remain over the eastern U. A stronger cold front expected to affect the area over the weekend bring more unsettled weather and cooler temperatures. Mean upper troughiness extending from New England SW to the Gulf Coast. A weak upper low over GA will drift east and move off the southeast coast Wednesday night. Also, a weak cold front will move into the area from the north and dissipate. Overnight lows will continue in the low to mid 70s.
Temperatures are running a few degrees above climo this afternoon with 3 PM readings generally in the low to mid 90s. In fact, a few locations may be a degree or so warmer on Wednesday. Dewpoints are forecast to be a bit lower, likely a response to the subsidence associated with the building upper-level ridge.