Aikyam-Lab/Synoptic-Bench huggingface dataset:
Low winds and waves are expected with high pressure in control. A quiet evening is shaping up for southern Wisconsin with high pressure located over the mid Missouri valley. High pressure will dominate this period. Core of the high slides to our south on Tuesday with a light westerly flow noted. Mid level ridging and the dry airmass prevails with some bump in 925 temps.
High pressure sagging into the region will keep winds light through the period.
722 PM EDT Mon Aug 7 2017 A low pressure will track across the southern Gulf of Maine Tuesday then exit across the maritimes Tuesday night.
950 PM EDT Mon Aug 7 2017 Low pressure will slide off the Mid Atlantic Coast tonight.
With a cold front settling south of our taf sites, the main concern overnight will be potential for fog and stratus.
After midnight, any lingering showers/storms overnight will be across the higher terrain of s-central ID, south of the Snake River. Isolated showers and thunderstorms over the higher terrain south of the Snake River Valley and in southeast Oregon will dissipate before 06z. These clouds are associated with an upper low over northwestern Nevada. The upper low will dissipate tonight but another weak upper low will form off the northern Calif coast.
The low level instability has waned with the loss of daytime heating. but enough mid to upper level instability remains as the weak upper low sits over northern CA and southwest OR to maintain a chance for storms as far west as Highway 95 late this evening. /Issued 207 PM PDT Mon Aug 7 2017/ Low pressure stalled over northern California will produce thunderstorms through midweek with heavy rainfall possible.
Extensive low cloud cover remains in place across the region in the wake of the low pressure system that moved through earlier. Clouds will also hold temps up a few degrees in the lower to mid 60s. Highs will top out in the lower 80s with lows in the mid 50s to lower 60s.
In the northern stream, the water vapor loop indicated an upper level low pressure trough over Hudson Bay with the trough rotating through northern Ontario. Trough will send a reinforcing shot of cold air south tonight and Tue. A cold front will backdoor into the northeast zones tonight and Tue. Water vapor loop indicated another short wave over southwest SASK and a stronger upper low in tow over eastern ALTA.
1051 PM EDT Mon Aug 7 2017 Low pressure will continue to move away from the Mid Atlantic Coast tonight.
/issued 206 PM CDT Mon Aug 7 2017/ Another round of thunderstorms is possible this afternoon/tonight as a frontal boundary has moved to the higher terrain of southwest Texas, then eastward across the southern Permian Basin. Dewpoints are pretty high, along, ahead, and behind the front with widespread low to mid 60s over the higher terrain, and upper 60 to lower 70 over the Permian Basin and Lower Trans Pecos.
1149 PM CDT Mon Aug 7 2017 At H5 strong closed low over the Aleutians. sharp ridge all the way into the Yukon. Quasi blocking pattern developing over the west coast. Quasi blocking pattern to the south of Greenland. These features are allowing a broad trough across the Northern CONUS. With energy coming underneath the upper low off the California coast across the central Rockies northeast Colorado and western Kansas will continue to see brunt of systems coming through with southwest Nebraska on the northern edge.
1136 PM CDT Mon Aug 7 2017 High pressure was located from the northern to central plains at 19Z with while a weak upper trough extended from central Iowa into north central Kansas. The patchy showers and extensive CU field shown on satellite are expected to dissipate quickly during the early evening with the loss of heating with skies becoming mostly clear as high pressure expands eastward. Return flow increases and deepens on Tuesday as the high shifts east with an area of mid level warm advection developing over the western high plains. Showers and thunderstorms are indicated by models to develop in this warm advection pattern over western parts of the region on Tuesday then spread north and east Tuesday night as the low level jet increases Tuesday night.
731 PM EDT Mon Aug 7 2017 An area of low pressure and frontal boundary remain nearby, but much of the heaviest rain has exited the region. Clouds will scatter out Tuesday afternoon, as a positively trough exits off to our southeast. High pressure will build in across the Ohio Valley Tuesday night, allowing for clearing skies, temperatures dipping down into the 50s, and areas of fog in the valleys.
1058 PM CDT Mon Aug 7 2017 Showers continue to move along a cold front that stretches from Clarksdale to Tupelo, Mississippi this evening.
Low-level ridge axis remains just north of the central FL peninsula. Models shift ridge axis slightly southward, but still near to north of the Cape and also show some drying building in from the east in the mid levels. Highs will continue to range from the low 90s along the coast to mid 90s over the interior. Ridge axis remains north of central FL. Position of the ridge axis to promote SSE/SE flow areawide.
745 PM EDT Mon Aug 7 2017 High pressure will build into the region through mid week bringing drier conditions and below normal temperatures. Lows tonight will range from the mid 50s in the northwest to the lower 60s across the southeast.
719 PM EDT Mon Aug 7 2017 Low pressure will slide off the Mid Atlantic Coast tonight.
For Tuesday it looks similar to today with east to southeast flow south of the ridge axis combining with daytime heating and the sea breezes to cause scattered afternoon and evening thunderstorms.
The next wave of activity, collocated with the upper level low feature to the west will begin impacting parts of southeast Texas by early Tuesday morning. A cold front has moved into North Texas and South Arkansas today with deep moisture pooled in south of the boundary and over the local area. An upper level trough is also over central sections of the country with embedded vorts affecting TX and LA.
825 PM EDT Mon Aug 7 2017 Drier air will settle in overnight with lows dropping into the lower to middle 50s. Positive tilted trough dropping south through Great Lakes will exit the local area early this evening. Expect any residual showers to end around sunset coincident with trough passage. High pressure builds in for Tuesday with mostly sunny skies and temps in the 70s.
609 PM CDT Mon Aug 7 2017 The pattern aloft continued to feature an active northwest flow regime across the Central Plains with the main upper low pressure systems located in northern CA, Manitoba and Quebec with several subtle waves embedded within the flow. At the surface, a high pressure ridge was building southeast from the Dakotas into northern and eastern Nebraska.
1212 AM EDT Tue Aug 8 2017 A low pressure will track across the southern Gulf of Maine Tuesday then exit across the maritimes Tuesday night.
1150 PM EDT Mon Aug 7 2017 Ongoing dry air advection associated with high pressure building in from the west will sustain clear skies through the morning and light and variable winds. A broken line of showers and some thunder has developed across the Saginaw Valley and Thumb on the lead edge of the 500mb trough axis. This combined with clear skies and light winds will bring a rather unAugust like low in temps, mainly in the low 50s with many outlying sheltered areas dipping into the upper 40s.
1023 PM EDT Mon Aug 7 2017 A low pressure will track across the southern Gulf of Maine Tuesday then exit across the maritimes Tuesday night.
High pressure will encompasses the region through the period. /Issued 741 PM CDT Mon Aug 7 2017/ Northwest flow prevails aloft, on the upwind side of a NE-SW oriented mid level trough axis (with an embedded MCV between Temple and Huntsville TX) from southern AR to the TX Gulf coast. Sinking motion in the mid levels on this side of the upper trough will maintain dry conditions tonight. A large and broad anticyclone was centered over the Midwest at the surface, which has helped keep temps well below seasonal averages, and has brought in some drier air. High pressure sagging into the region will keep winds light through the period.
736 PM EDT Mon Aug 7 2017 Aviation A weak cold front will bring isolated showers late this afternoon before skies gradually clear tonight as a drier airmass moves in. High pressure will bring fair weather with seasonable temperatures Tuesday through midweek. A weak cold front will bring isolated showers along and ahead of it over roughly the southeastern half of our fcst area mid to late this afternoon.
Though boasting individual cores with instantaneous dual pol rates of 4+ inches per hour, the surrounding areas have been pretty light, and with pretty quick individual cell motion being pretty quick, the highest of MRMS one hour QPE are isolated pixels a tad over 1 inch.
A upper level trough center across northern California will send a series of weak weather disturbance across northern Utah and southwest Wyoming during the week. High pressure aloft will expand slowly northward across the region late in the week.
1013 PM EDT Mon Aug 7 2017 High pressure will build into the region through mid week bringing drier conditions and below normal temperatures. Models are suggesting that the cirrus will begin to thin after midnight as upper support is shunted to the east by H5 trof. Lows tonight will range from the mid 50s in the northwest to the lower 60s across the southeast.
1013 PM EDT Mon Aug 7 2017 A cold front will makes its way through the area overnight into Tuesday morning.
604 PM CDT Mon Aug 7 2017 High pressure was located from the northern to central plains at 19Z with while a weak upper trough extended from central Iowa into north central Kansas. The patchy showers and extensive CU field shown on satellite are expected to dissipate quickly during the early evening with the loss of heating with skies becoming mostly clear as high pressure expands eastward. Return flow increases and deepens on Tuesday as the high shifts east with an area of mid level warm advection developing over the western high plains. Showers and thunderstorms are indicated by models to develop in this warm advection pattern over western parts of the region on Tuesday then spread north and east Tuesday night as the low level jet increases Tuesday night.
A cold front will move through over the next few hours with rain showers and storms coming to an end.
This front and assoc upper trof will sink slowly south and stall near I-20 with enough instability for mention of vcnty tstms with daytime htg for KSHV, KELD, and KTXK.
1022 PM MDT Mon Aug 7 2017 Low amplitude upper trough is crossing the eastern half of the CONUS with weak northwest flow aloft over the northern plains. Overall quieter weather is expected Wed-Thu as a weak cold front crosses the region. Upper ridging will be reinforced across the western CONUS by late in the week with stronger cyclonic flow developing across the northern plains.
242 AM EDT Wed May 3 2017 High pressure today. An upper low brings unsettled and much cooler weather to end the work week. CAA under weak broad high pressure today. A warm front lifts north tonight and may brush the area with some -ra/-dz or even just sprinkles. PoPs increasing to the west as associated low pressure approaches the area. Cloud cover builds during the overnight hours Wednesday into Thursday with winds turning more southerly and south-easterly coinciding with warm frontal passage.
Dry weather continued across the greater Tennessee Valley this evening, thanks to an area of high pressure situated across the NE Gulf of Mexico. A loss of daytime heating and a forming evening inversion (warmer temperatures aloft) has decoupled winds (now light from the south) from an earlier 5-15 mph range. Expect lows mostly in the low/mid 50s - with cooler values in our northern and eastern areas. The atmosphere will also begin to moisten rather quickly, especially during the afternoon as the warm frontal boundary situated across southern Louisiana lifts our way. The approaching upper trough will eject out of the Southern Plains and induce rather deep cyclogensis across the mid Mississippi Valley. By late Wednesday evening, expect the warm front to be draped in the vicinity and coupled with very strong moisture transport will aid in widespread shower development.
As the low-level jet veers early this morning, the MCS is expected to propagate eastward, with the brunt of it shifting to east of the Kansas Turnpike in the 12-15 UTC time- frame, before moving out of southeast Kansas. A trailing upper-level pv anomaly over the Northern High Plains early this morning, will move southeastward into the Central/Southern Plains this afternoon into tonight, which will result in an upper low forming over the Lower Mississippi Valley on Thursday. Breezy northerly winds can be expected Thursday behind the departing upper low.
Aloft North America this morning - One short wave trough is aloft the Manitoba/ND/MN border with a second over the Desert Southwest. a trough over Quebec reaches down over New England. and modest ridging covers most of the Gulf of Mexico. high pressure sprawls from the southeast U. The two short wave troughs merge over the high plains today and form a closed low over the central plains tonight that tracks to the lower Ohio Valley Thu. The closed low forms a surface reflection on the plains frontal boundary and drags it along into the Ohio Valley. high pressure slides out over the Atlantic today as the south FL boundary meanders across that area then dissipates tonight.
205 AM EDT Wed May 3 2017 Cooler and drier conditions will be observed tonight into Wednesday as high pressure builds into the area. Low pressure will bring a return of showers by Wednesday night and Thursday with unsettled conditions and cool temperatures lingering through the end of the week. 850 mb temperatures Wednesday morning will be around freezing and will warm to around 4 degrees C by the afternoon (supporting highs near 60 degrees). Wednesday afternoon the system will begin to cutoff into an upper level low and head east. By late Wednesday night the upper level low will quickly mature and begin to become vertically stacked.
High clouds however will thicken in far srn WI later today as an upper trough digs into the srn Great Plains. Cyclogenesis will then ensue from the Lower MS River Valley toward the Ohio River Valley. 925 mb temps around 9-10C support high temps in the lower 60s over south central WI today while a lake breeze will keep ern WI in the 50s.
335 AM EDT Wed May 3 2017 A weak surface cold front will drop southward across central NC today and stall near the South Carolina border tonight.
High pressure will build into the region tonight with clear skies and light winds.
highs should recover again into the lower 60s over most of the area sans the south where thicker clouds will hold afternoon readings in the mid to upper 50s.
As trough axis to the west slowly works in later today, associated weak cold front will bring shower and isolated thunderstorm risk to doorstep of forecast area, but weakening trend supports low rain threat. Flow becomes even more aplified in outer forecast periods as large ridge builds over western half of CONUS. As closed upper low moves by to our south for Thursday, cold front associated with trough will gradually slide through the area. At this point will honor dry forecast but this period too will have to be monitored for this low threat.
Rising heights and warmer temperatures will pump in aloft as an upper trough digs across the Great Plains into the Ozarks, setting up an increasing southwesterly flow regime. Increasing cloud cover will put a damper on warmer temperatures, but near to just slightly below normal readings will be in the offing, ranging from the mid-upper 60s along and north of Mountain Parkway to the low-mid 70s south. Forecast sounding profiles support 30-35 knots of downward momentum transfer through the boundary layer, with greater speeds certainly possible with a 40-50 knot wind maximum within the lowest 1 km of the surface. Gusts to 50+ mph will be a good bet on the ridgetops of far southeastern Kentucky through the afternoon. As the low occludes Thursday evening, the occluded front will work east across the area with tremendous lift aided by great upper level dynamics.
The vast majority of this forecast package will be dominated by high pressure aloft.
348 AM EDT Wed May 3 2017 High pressure today. An upper low brings unsettled and much cooler weather to end the work week. CAA under weak broad high pressure today. A warm front lifts north tonight and may brush the area with some -ra/-dz or even just sprinkles. PoPs increasing to the west as associated low pressure approaches the area.
An upper level ridge will build over the region today and then will gradually shift eastward on Thursday as a trough approaches the Pacific Northwest. This ridge will bring hot temperatures to inland areas today and Thursday.
507 AM EDT Wed May 3 2017 Cool and dry conditions will be observed into this afternoon as high pressure builds into the area. Moisture return ahead of a developing upper level low will bring a chance of showers tonight and Thursday. The upper level low will track through the Ohio Valley keeping unsettled conditions and unseasonably cool temperatures lingering into the weekend. Temperatures will show a good gradient with highs from the lower 50s northwest to near 70 southeast. Large area of low pressure will be tracking into the Ohio Valley Thursday night.
648 AM EDT Wed May 3 2017 Cool and dry conditions will be observed into this afternoon as high pressure builds into the area. Moisture return ahead of a developing upper level low will bring a chance of showers tonight and Thursday. The upper level low will track through the Ohio Valley keeping unsettled conditions and unseasonably cool temperatures lingering into the weekend. Temperatures will show a good gradient with highs from the lower 50s northwest to near 70 southeast. Large area of low pressure will be tracking into the Ohio Valley Thursday night.
336 AM CDT Wed May 3 2017 (Today and Tonight) A cold front currently over the Texas Panhandle will move through the Big Country early this morning, then through the central portions of West Central Texas by mid to late morning, finally moving through the Interstate 10 corridor by late morning or early afternoon. Behind the cold front, expect gusty north winds of 15 to 25 mph along with slightly cooler temperatures. Highs today will range from the 70s across the northern half of the forecast area to the low to mid 80s across the southern half of the area. Expect low temperatures in the low to mid 50s.
642 AM EDT Wed May 3 2017 High pressure today. An upper low brings unsettled and much cooler weather to end the work week. CAA under weak broad high pressure today. A warm front lifts north tonight and may brush the area with some -ra/-dz or maybe just sprinkles. PoPs increasing to the west as associated low pressure approaches the area.
At the surface, a cold front remains across the southern part of the Florida peninsula, with high pressure building in over the southeast behind it. Lows for tomorrow will be a few degrees cooler than this morning. A cold front over the southern part of the Florida peninsula will continue to weaken through tonight. For Wednesday night into Thursday, another approaching cold front will turn winds to the southeast with an increase in speed to near exercise caution levels.
424 AM EDT Wed May 3 2017 Dry weather under high pressure is expected before low pressure returns periodic rain chances later tonight night through the weekend. Building high pressure will result in mainly dry conditions outside a few isolated showers this morning as a weak boundary drops south over the forecast area. Cloud cover will diminish briefly this afternoon but increase again heading into the evening in warm advection ahead of approaching low pressure. Low pressure will deepen over the Midwest as the longwave pattern amplifies and becomes more meridional with rain slowly overspreading the region overnight. Overall model consensus still indicates areas north and west of Pittsburgh will be favored through Thursday in an inverted trough for higher rainfall amounts.
The warm front that is helping to focus the current storms will lift through into the area today helping to continue the rain.
A cold front will move through the area late in the afternoon, arriving into DRT around 21Z and AUS/SAT 22Z-23Z. A broken line of SHRAs and TSTMs will be possible along the cold front across central and eastern areas, including AUS/SAT where a PROB30 has been indicated in the TAFs. Gusty N winds will develop behind the cold front, with gusts to around 25 kts possible through the late afternoon and evening.
538 AM EDT Wed May 3 2017 Dry weather under high pressure is expected before low pressure returns periodic rain chances later tonight night through the weekend. Building high pressure will result in mainly dry conditions outside a few isolated showers this morning as a weak boundary drops south over the forecast area. Cloud cover will diminish briefly this afternoon but increase again heading into the evening in warm advection ahead of approaching low pressure. Low pressure will deepen over the Midwest as the longwave pattern amplifies and becomes more meridional with rain slowly overspreading the region overnight. Overall model consensus still indicates areas north and west of Pittsburgh will be favored through Thursday in an inverted trough for higher rainfall amounts.
Frontal boundary was located across central Oklahoma to a low pressure over northwest Texas. Energy on the back side of the eastward moving upper trough will bring increasing chances of showers and isolated thunderstorms to north central Kansas this afternoon into the early evening hours. Tonight skies clear with the passage of the trough with lows dipping into the 40s for lows. An Omega type blocking pattern will begin to take hold and minimize any real chance of significant precipitation for the better part of an entire week.
A strong ridge of high pressure builds over the Northern Rockies today through Thursday. Some mid to high level clouds will be streaming over the ridge today as temperatures approach seasonal readings.
A cold front will then move through during the evening with winds shifting to the north. Strong cold front will race across S TX and accelerate after sunset.
Series of upper waves will move into the region today with main energy digging into the southern plains then moving east across the Ozark Plateau toward the lower Ohio Valley tonight. A weak cold front will push into eastern Nebraska this morning then wash out during the late afternoon and evening as upper forcing associated with the weaker northern wave shifts east of the area. As the primary southern stream trough tracks slowly east toward the lower Ohio Valley tonight and Thursday, ridging over the western CONUS will begin to spread into the the central plains region.
Upper ridge along the west coast early this morning will spread across the Northern Rockies through the end of the week. Temperatures jump about 5 to 10 degrees each day with warm and dry air under the ridge spreading east with the ridge. Weak pressure gradient under the ridge will also keep winds on the light side over the next few days.
High pressure over the Southern Appalachian Region will provide a quiet night with decreasing winds.
Main forecast issue will be potential for strong to severe thunderstorms late this afternoon and evening as a cold front moves through South Texas. An upper level trough will slowly move eastward through the Plains state today. Onshore flow in advance of this trough will continue to bring moisture back into the area. At the surface, a cold front will be moving southward across the state during the day. Cooler air will filter in tonight into Thursday morning as lows will fall into the upper 50s and lower 60s. A strong cold front will move through South Texas this evening.
Strong high pressure will build over the region through the rest of the week bringing a warming trend.
321 AM MST Wed May 3 2017 High pressure building over the Southwest will give the lower desert elevations another run at the first triple-digit readings of 2017 this week.