Aikyam-Lab/Synoptic-Bench huggingface dataset:
306 AM PDT Fri May 26 2017 Cooler with light showers possible today as a weak trough of low pressure moves through the region. High pressure aloft will rebuild over the West this holiday weekend for warmer weather and a shallower marine layer.
105 AM EDT Fri May 26 2017 High pressure will pass to the south Friday and Saturday.
345 AM EDT Fri May 26 2017 High pressure building across the Southeast states today will promote dry and pleasant conditions. Warmer temperatures and a chance for showers and thunderstorms will return over the weekend. A cold front will approach from the west on Memorial Day. Low pressure continues to lift NE over southern New England this morning. With the low continuing to head NE today, expect deep layered WNW flow to promote dry, breezy and comfortable conditions under a partly to mostly sunny sky. Weak ridge aloft nudges into the region from the WSW tonight into Sat. Lows from the upr 50s NW to the low/mid 60s SE. Partly to mostly cloudy Sun w/ highs mainly in the low/mid 80s, except 70s Eastern Shore and at the beaches.
422 AM EDT Fri May 26 2017 An upper low is sliding off to the northeast and leaving a cool northwest flow in it's wake. Weak ridging will move in but many chances for showers and a few thunderstorms are seen through the holiday weekend.
406 AM EDT Fri May 26 2017 High pressure will be in control of the sensible weather today, but will shift to the southeast tonight. For Saturday, the highest risk of storms should be well to the north across the Mid Atlantic/TN/KY.
Dewpoints today should be able to climb into the lower 70s over the Rio Grande and western Brush Country and middle 70s elsewhere. Highs may actually be a degree or two warmer than today.
317 AM PDT Fri May 26 2017 The low will push the marine layer. The upper trof that was forecast to provide enough lift for more drizzle or a shower or two really look too far east and too weak to do much of anything over CA. Max temps will remain below normal but will be a degree or two warmer than ydy as hgts will rise. A slight ridge builds in for Saturday and onshore flow will weaken to moderate levels. Sun and Mon are shaping up to be a pair of nice days with a 52 DM ridge in place.
141 AM EDT Fri May 26 2017 An upper low pressure system continues to pivot away from the region allowing showers to push away during the early overnight. Scattered showers and perhaps a few thunderstorms are once again possible Friday afternoon into Friday night as a low pressure system approaches the region. Low level flow may be just strong enough east of approaching low level ridge axis to promote stratus vs fog, but may consider patchy fog mention across central/western portions of the area late evening/overnight. A transition to more zonal flow is expected into Friday and Saturday as deep circulation opens toward the Canadian Maritimes and the next longwave trough edges east into the Northern Plains/south-central Canada.
412 AM EDT Fri May 26 2017 High pressure building across the Southeast states today will promote dry and pleasant conditions. Warmer temperatures and a chance for showers and thunderstorms will return over the weekend. A cold front will approach from the west on Memorial Day. Low pressure continues to lift NE over southern New England this morning. With the low continuing to head NE today, expect deep layered WNW flow to promote dry, breezy and comfortable conditions under a partly to mostly sunny sky. Weak ridge aloft nudges into the region from the WSW tonight into Sat. Lows from the upr 50s NW to the low/mid 60s SE. Partly to mostly cloudy Sun w/ highs mainly in the low/mid 80s, except 70s Eastern Shore and at the beaches.
336 AM EDT Fri May 26 2017 Low pressure is developing in the Gulf of Maine this morning. Low pressure will continue northeast into the maritimes through tonight.
429 AM CDT Fri May 26 2017 A cold front, located across the northern portions of the Texas Panhandle, will move across the remainder of the forecast area this morning before becoming stationary. An upper trough, moving across the Intermountain Region and the central Rockies later today through Saturday, will approach the Panhandles by Saturday night.
MUCAPE values may climb into the 250 to 500 J/kg range by this afternoon as a weak cold front edges in from the west so we may see some isolated to scattered thunderstorms during the afternoon hours.
442 AM MDT Fri May 26 2017 Mean troughing will continue over the region through the weekend as a closed upper low spins over southern Canada.
Upper low over the northern Great Basin with upper trough dropping slowly southward across the north state. This trough is bringing a few clouds to the northern CWA but bigger influence is a continued very deep marine layer. GFS paints a small area of precipitation over the northern Sierra this afternoon as upper trough axis moves through this region so left a slight threat of thunderstorms northern Sierra crest for the afternoon and evening hours even though other models to not have this feature. Upper ridge pushes in over the west coast on Saturday bringing the beginning of a warming trend. GFS and NAM both paint light precipitation over the northern Sierra associated with upper trough axis.
322 AM EDT Fri May 26 2017 On the back side of a low pressure system, today will feature a cool northwest wind and scattered showers.
229 AM EDT Fri May 26 2017 High pressure will extend across the Southeast states today into Saturday, as a weak trough extends down through western and central North Carolina.
657 AM EDT Fri May 26 2017 A trough across the eastern Great Lakes will pull away from the region today. High pressure will briefly be in place for the latter half of today.
Tonight Through Saturday Upper low pressure over the northeast U. and southern Canada will move east tonight as an upper ridge builds over Arkansas. The upper ridge will move east of Arkansas Friday and southwest flow will return to the state. An upper trough will enter the Rockies Friday night and move into the Plains Saturday. Warmer temperatures are expected Friday in the lower 80s to lower 90s and a bit cooler Saturday with more cloud cover. The cold front nears the northwest corner of Arkansas Saturday morning.
433 AM EDT Fri May 26 2017 A trough across the eastern Great Lakes will pull away from the region today. High pressure will briefly be in place for the latter half of today.
325 AM CDT Fri May 26 2017 Another quiet, and unseasonably warm day will close out the end of the week, as flattened UA ridging progress overhead. Attention will turn to a positively-tilted UA trough extending from a closed low across southern Canada to across the Northern Plains southwest to across the Southern Rockies tomorrow. The second boundary is a cold front that will propagate southeastward and near southeast OK and extreme northeast TX late tomorrow aftn/early evening. Thunderstorms are progged to develop along and ahead of the cold front. Best severe indices are across the northwest zones tomorrow evening/night, associated with the impingement of the cold front. Furthermore, 0-1 km helicity values of 200-300 m2/s2 and a veering hodograph in the low levels implies isolated tornadoes can not be ruled out.
132 AM EDT Fri May 26 2017 Low pressure over eastern OH will move off to the ne thru Fri to allow a weak ridge of high pressure to push across the region Friday then weaken Saturday.
200 AM EDT Fri May 26 2017 On the back side of a low pressure system, today will feature a cool northwest wind and scattered showers.
With a fair amount of sun expected, we should take full advantage of the encroaching thermal ridge ahead of the front and reach the upper 70s across southern and eastern MN. This will lead to cooler air with limited moisture content.
A frontal boundary stretched from this low through the Red River Valley and south. It will be cooler around Lake Superior. The upper low will be moving slowly east to northeast tonight into Saturday with an upper trough extending well south through the region.
Ridging pushing in from the west will bring mostly clear skies as well as give daytime highs a slight bump. Temperatures will generally top out in the upper 80s Friday and in the low 90s Saturday which is a few degrees above average. Areas along the coast however will stay a bit cooler toping out in the mid 80s.
240 AM EDT Fri May 26 2017 High pressure ridging across the Appalachians at this time will weaken as our next low pressure system moves out of the Central Plains. This low will be filling though as it moves into the Midwest this evening.
1216 AM CDT Fri May 26 2017 Lower cloud cover continues to shift into western portions of the area as the next short wave wraps around upper low along the Saskatchewan/Manitoba border. The 00 UTC surface analysis showed a pressure trough or weak cool front along a Rolla-Medina-Ashley line.
12z models trying to bring temps down/RH up for the northeast zones but think that sun should keep things a bit warmer, so decided to leave that alone. TFJ Synoptic Setup: A high pressure heat dome resides over the western half of the CONUS with a weak ridge developing into southern British Columbia. Cooler air to the northeast will generate a thermal boundary that is expected to drop south Tuesday afternoon. Today through tonight: expect the ridge to keep conditions dry and clear to partly cloudy and warm. Wednesday: By the afternoon most of the cool air should have exited the area as the ridge axis to the west begins moving into central Montana.
1117 AM EDT Tue Aug 29 2017 Upper level system moves through by midweek, while a low pressure system grazes the mountains today.
609 AM CDT Tue Aug 29 2017 The HRRR and RAP models suggest an inverted trof (sfc-800mb) will set up across Wrn Neb this afternoon. Strong upper level ridging will continue across the region keeping conditions dry and fair.
1200 PM EDT Tue Aug 29 2017 Potential Tropical Cyclone Ten will move northeast across the northern Outer Banks this afternoon and out to sea by this evening.
WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO At 9 AM PDT, water vapor satellite imagery displayed an upper- level ridge centered over the Nevada/Utah/Arizona border, and an upper-level trough off the coast of the Pacific NW. An update was sent this morning to add fog along the immediate coast today, lower highs along the immediate coast a few degrees because of the fog, and the addition of a slight chance of thunderstorms over portions of the High Desert. The upper-level ridge will remain in place through the middle of the week.
745 AM EDT Tue Aug 29 2017 Dry conditions and fair weather continue through midweek as high pressure remains over the Northeast.
Otherwise forecast on track for a pleasant ridge-dominated day with partly to mostly clear skies and cooler air wedged in place between Harvey to the SW and a weaker low off the Carolina coast. /Issued 740 AM EDT Tue Aug 29 2017/ Short term forecast period marked by a shift to cooler and wetter conditions as the state begins to see more of an impact from Tropical Storm Harvey. Temperatures will be noticeably cooler Wednesday due to the cloud cover and precip activity, with highs only in the 70s across the northern half of the state.
At this time, the forecast takes the remnants of the tropical cyclone over the CWA, providing a focus for widespread heavy rainfall. Temperatures ranged from the low 60s to about 70F with light to calm winds. A pocket of drier air/subsidence in the wake of yesterday's passing midlevel trough will keep any convection weak and isolated.
1244 PM EDT Tue Aug 29 2017 High pressure will slowly slide south of the region later today into Wednesday.
Drier air will be in place this afternoon limiting thunderstorms development to along the Nevada border and the higher terrain of Southwest Idaho. The upper level ridge remains over the region today which will allow for temperatures to reach near records. Mid to high level moisture will increase tonight as the next upper level trough reaches the Pacific Northwest coast. An upper level ridge, currently situated over the region, will continue its progression east through the short-term; as it does so, a southwesterly flow aloft will strengthen and bring in drier air today. This will limit moisture across southeast Oregon, confining thunderstorm development this afternoon mainly to the higher terrain of southwest Idaho. As today progresses, an upper level trough off the Pacific coast will creep inland.
1006 AM EDT Tue Aug 29 2017 Dry conditions and fair weather continue through midweek as high pressure remains over the Northeast.
/Issued 336 AM EDT Tue Aug 29 2017/ Short term forecast period marked by a shift to cooler and wetter conditions as the state begins to see more of an impact from Tropical Storm Harvey. Temperatures will be noticeably cooler Wednesday due to the cloud cover and precip activity, with highs only in the 70s across the northern half of the state.
Upper air plots this morning continued to show an anomalously strong high centered across southern Utah with expansive upper ridge covering the western CONUS.
Chattanooga Airport, TN 83 69 80 68 / 10 20 60 70 Knoxville McGhee Tyson Airport, TN 83 67 82 67 / 10 10 40 60 Oak Ridge, TN 81 67 83 67 / 10 10 40 60 Tri Cities Airport, TN 81 63 82 64 / 20 10 30 40.
Dry and very warm weather will continue through today as the region remains under the influence of ridging aloft. Currently, broad low pressure remains over eastern Montana/Wyoming. Cool high pressure was over the Great Lakes and Ohio Valley, with another high pressure airmass over central Canada. A frontal boundary separated the two high pressure centers, extending from Lake Winnipeg across southern Saskatchewan. At upper levels, a well- established thermal ridge was over the western US extending north along the Canadian Rockies.
Upper level pattern across the CONUS has an upper level ridge over the western U. At the surface, we have a large area of high pressure situated from the Great Lakes southwestward into the central plains. Last night, we had quite a bit of low stratus and dense fog across the area associated with the high pressure behind pockets of showers and storms. Northwest flow aloft and the cooler high pressure will keep us below normal for temperatures around 7 to 9 degrees below normal for this time of year with highs from the upper 70s to low 80s. GFS/ECMWF have an overall similar track, but quite a bit of timing differences with the ECMWF lifting the low to the northeast quite a bit quicker than the GFS.
Late week into Labor Day weekend weather becomes benign with slight to low end chance POPs to account for redeveloping precipitation left in Harvey's trailing trough. minimums in the low to mid 70s (low to mid 70 dew points to keep early September feeling like.
It does not appear any of this would reach the ground other than at the higher elevations. We added isolated showers in the high country for this morning. Ridge of high pressure will keep temperatures in the 90s an mainly dry conditions in place today and tomorrow. Entrained mid level monsoonal moisture will try to generate more widespread cloud cover and a few high based thunderstorms over area mountains during the afternoon hours, possibly drifting into the lower elevations in the evening.
Per the latest analysis, these showers have dissipated, bringing a slight increase in cloud cover from Big Pine Key and across the Seven Mile Bridge. Generally quiet weather is expected today across the Florida Keys island chain as deep ridging continues to dominate the weather pattern with light south southeasterly breezes. Expect high temperatures to run several degrees above normal for late August, topping out in the lower 90s, with heat index values averaging around 105 degrees. A ridge high pressure will continue to build in across the Florida Keys and South Florida today, resulting in light southeast to south winds at 5 to 10 knots across the coastal waters.
A strong ridge of high pressure centered over the Great Basin will bring near record heat to much of the central California interior again today.
1008 AM EDT Tue Aug 29 2017 Potential Tropical Cyclone Ten will move northeast across the northern Outer Banks this afternoon and out to sea by this evening.
100 PM EDT Tue Aug 29 2017 Upper low still in the vcnty currently over southern Lk Michigan and lower Michigan. With the potential for some sunshine, max temps should continue on an upward trend with readings in the low to mid 70s. Onshore flow will keep temps along Lk Superior slightly cooler in the mid to upper 60s.
1155 AM EDT Tue Aug 29 2017 Low pressure will move NE, away from the NC coast this afternoon.
A large ridge of high pressure is centered over the Desert Southwest. A weak disturbance is exiting our forecast area into Idaho as it rotates around this upper level high. The current WV Satellite loop shows our CWA remaining in a southwest flow pattern for today and tonight as an offshore trough approaches.
627 AM CDT Tue Aug 29 2017 Early morning Water Vapor loop/RAP analysis shows a closed low over Lower MI/IN with a ridge of high pressure building into the area from the Northern Plains. For today, look for that stratus to lift into flat cumulus under the inversion of incoming ridge of high pressure. High pressure moves directly overhead tonight. Will be watching a cold front drop southward through area Wednesday afternoon/evening for a chance of showers and storms. Otherwise, heating ahead of the front should push highs Wednesday well into the 70s to the lower 80s.
701 AM EDT Tue Aug 29 2017 Upper low still in the vcnty currently over southern Lk Michigan and lower Michigan. With the potential for some sunshine, max temps should continue on an upward trend with readings in the low to mid 70s. Onshore flow will keep temps along Lk Superior slightly cooler in the mid to upper 60s.
Low pressure will track northeast along the Atlantic coast today. A trailing trough will extend across the northeast Florida waters. This trough will lift North across the waters Tonight into Wednesday.
Overnight, we do pick up some upper divergence late in advance of the trough axis.
A very hot weather pattern is expected across the Mojave Desert Region much of this week as high pressure parks over southern Nevada and surrounding states. Limited moisture circulating around the area of high pressure will lead to isolated showers or thunderstorms over the mountains each afternoon. Storms will likely initiate over the mountains this afternoon and remain focused over the high terrain through the late afternoon and early evening.
1012 AM EDT Tue Aug 29 2017 High pressure remains over the region through Wednesday.
512 AM MDT Tue Aug 29 2017 Strong upper ridging is persisting across the western two thirds of the CONUS with northwest flow continuing aloft over the Great Plains into the upper Midwest. Little change to the pattern through tomorrow though some eastward movement to the ridge is expected.
1003 AM EDT Tue Aug 29 2017 An upper level trough will move across the region today.
1139 AM EDT Tue Aug 29 2017 Low pressure along the Carolina Coast will track off to the northeast today. High pressure will ridge into the forecast area through midweek. Weak high pressure will be building in at the surface. The models do have weak upper ridge across the area, but with Tropical Storm Harvey slowly tracking northward into eastern Texas Wednesday, there may be some Gulf Moisture that pushes towards the southeastern states. The region should still see an increase in moisture from the Gulf of Mexico ahead of the low.
225 AM PDT Wed May 31 2017 A weak low pressure system moving through California will bring cool weather and extensive coastal clouds today and Thursday.
407 AM EDT Wed May 31 2017 This morning, an elongated ridge of upper level high pressure was observed on water vapor imagery, centered near Bermuda. 45 inches of PW and SB CAPE above 2000 J/KG, along with small capping temperature inversions in the lower levels. This afternoon, as the aforementioned ridge of high pressure weakens slightly and moves slowly eastward, the flow will veer more southeast. Subsidence from high pressure aloft, along with light winds, will allow maximum temperatures to reach into the lower 90s along the coasts and mid 90s inland. As high pressure begins to weaken on Thursday, guidance decreases maximum highs by a few degrees.
349 AM CDT Wed May 31 2017 A series of weak disturbances across MT and WY will drop south along a h700mb warm front draped across Neb. It is possible the cap is too strong relative to the low level instability. A very modest 20 to 30 kt h500mb jet will be in place and the higher K indices in the models appear to be mostly south and west of the forecast area favoring the Neb Panhandle.
401 AM CDT Wed May 31 2017 A coastal trough remains located just off the Upper Texas coast early this morning, with backed easterly flow in the vicinity of this feature resulting in a few showers across the coastal waters and along Bolivar Peninsula early this morning. Expect this trough to continue to weaken through the day, with isolated showers spreading across the coastal counties this morning and isolated to scattered showers and thunderstorms developing farther inland this afternoon as convective temperatures in the mid 80s are reached. 0 inches on CIRA layer precipitable water imagery) located about 150 miles south of the Upper Texas coast pushes into the region tomorrow as the coastal trough loses definition, expect rain chances to persist inland during the day Thursday with scattered to numerous diurnally driven showers and thunderstorms expected to develop.
It appears the low level moisture return has been limited. Satellite imagery shows the mid to upper level short trough from Chihuahua into Coahuila. Expect this short wave trough will move east-northeast into the Edwards Plateau down to south central Texas later today. Better moisture and instability will be over the Brush Country today as this short wave trough approaches.
348 AM EDT Wed May 31 2017 A cold front will sweep east and cross the region accompanied by showers and thunderstorms.
The sprawling long wave trough is finally beginning to move away early today with the PV trough, associated jet segment and embedded short waves slowly lifting off the east. This will keep highs today near persistence for the most part, outside of warmer readings north.
Have lowered PoPs slightly due to the high uncertainty of how things will play out later today. Another trough will dig along the West Coast and move east across N.
It is feasible that we continue to see widely scattered convection into this morning across southeastern Kansas and west-central Missouri as the low level jet strengthens. As we head into this afternoon and early this evening, low level convergence and temperatures warming into the lower to middle 80s will likely initiate more scattered thunderstorms from northeastern Kansas into central Missouri.
556 AM CDT Wed May 31 2017 Continued VFR with an upper level low pressure trough near the Rio Grande in southwest Texas slowly moving northeast towards the area by later tonight.
543 AM EDT Wed May 31 2017 A broad upper level trough will maintain daily chances of showers and thunderstorms, save for Thursday, through the weekend. Dry conditions will return tonight as high pressure builds back in over the forecast area.
Upper level ridge and associated axis will be positioned over the forecast area today resulting in sunny to mostly sunny skies and even warmer temperatures. Readings look to warm into the lower to middle 80s for many areas. Thursday looks to be a bit more active as another trough moves into the Pacific northwest. This will shift our current ridge and axis east into the western Dakotas resulting in a southwest flow aloft across our forecast area. The overall view of the forecast is a slightly warmer and drier one, compared to existing grid set.
223 AM EDT Wed May 31 2017 A cold front will then approach this afternoon and move through late tonight, followed by high pressure for Thursday and Thursday night.