Aikyam-Lab/Synoptic-Bench huggingface dataset:
Snow will persist into this evening as the upper low currently over northwest Kansas drifts east slowly and pulls the pcpn shield slowly eastward as well. Much quieter weather expected for the weekend as upper ridging sets up over the area.
838 PM MDT Fri Apr 13 2018 An upper level trof will continue to move eastward into the central Plains state today.
731 PM EDT Fri Apr 13 2018 High pressure centered off the coast will continue ridging into the southeastern states through Saturday.
As a vort lobe continues dropping SSE this evening from its present location near Tucumcari, a cold front will sweep south ahead of more tolerable northerly wind speeds. With the passage of the parent upper trough axis early Saturday morning, an enhanced northerly gradient flow will be poised over the eastern 2/3rds of our CWA through much of the day. Surface ridging and lighter north winds by Saturday night should set the stage for a light freeze for most/all of the region.
The cold front has overtaken the dryline and will sweep across the rest of eastern Oklahoma and northwest Arkansas overnight.
Scattered showers and thunderstorms will continue to push across far Southeast Oklahoma and Northwest Arkansas this evening ahead of a cold front pushing into the region. additional MVFR conditions look to possibly wrap back around on the backside of the upper level low as it moves eastward near the Oklahoma/Kansas border.
temperatures will be much cooler on Saturday with highs generally in the 50s. As the upper low pushes through Saturday night. With low temperatures in the low 30s overnight Saturday.
Gusty northwest winds will develop after 15Z Saturday behind a surface cold front. /issued 257 PM CDT Fri Apr 13 2018/ (Tonight) The upper low is over the Colorado/Kansas border with an upper trough extending across the southern Rockies. A cold front was moving south across the Texas Panhandle. The aforementioned cold front will move south across our area overnight. Temperatures will turn cooler overnight, with lows early Saturday morning expected to be in the lower to mid 40s. (Saturday through Friday) A cold front will move through the area early Saturday morning, resulting in gusty north winds and cooler temperatures.
As the low-level jet winds down and the line continues eastward, we should see it weaken, with perhaps a brief period of either dryness or very light rainfall. By late afternoon/early evening, models are picking out a new low pressure developing east of the original low, somewhere over southern IL. With the weakening of the earlier convection, we could see some pockets of instability develop out ahead of the cold front, still holding back along the MS River. The better threat for severe would be closer to the new low and its warm front, which looks to stay just north of our area.
Warmer air moving in aloft will decrease lapse rates and felt the threat of significant snowfall is over and cancelled the advisories early. Strong northerly flow aloft on the west side of a deepening trough over the midwest, will continue overnight. Freeze Watches were upgraded to Freeze Warnings for the lower elevations in the vicinity of Moab, Grand Junction, Montrose, Cortez, and the Paradox Valley. High pressure will gradually build in from the Great Basin Saturday with a slow warming trend.
A deep low pressure system will be slowly grinding its way toward the Southern Appalachian region during the next twenty four hours. Flight condition may remain vfr through the forecast period as a strengthening southerly flow creates warming and drying in the lower levels across the northern two thirds of the Great Valley.
A coastal trough/pseudo warm front near the SE Florida Atlantic coast will pivot northward up the coast through tonight, with increasing low level moisture from the south across the area. Convergence near the lifting trough axis will bring increasing low clouds and the potential for a few coastal showers to areas generally south of St. Low temperatures tonight expected to range in the low/mid 60s under mostly clear skies, less partly cloudy skies near the FL Atlantic coast and St Johns River basin. Saturday a weak trough axis will lift northward up the FL peninsula, which could bring restrictions due to low ceilings near SGJ and potentially GNV by 18Z with a low chance of showers.
Snow will continue through mid morning on Saturday as the low pressure system slowly slides eastward.
Another trof of low pressure extends from northern AB to the YNP area.
751 PM EDT Fri Apr 13 2018 Dry weather is expected tonight under high pressure. Rain chances will increase over the weekend with approaching low pressure.
A warm front is shifting to the northeast and some areas, mainly in the Cascades, will continue to see a few light showers. A ridge to the south will remain over the area into tomorrow.
529 PM MDT Fri Apr 13 2018 Strong northerly flow aloft on the west side of a deepening trough over the midwest, will continue overnight. Freeze Watches were upgraded to Freeze Warnings for the lower elevations in the vicinity of Moab, Grand Junction, Montrose, Cortez, and the Paradox Valley. High pressure will gradually build in from the Great Basin Saturday with a slow warming trend.
Many areas will likely see significant impacts from icing due to freezing rain and sleet in conjunction with windy conditions and falling temperatures.
910 PM CDT Fri Apr 13 2018 Latest sfc obs show winds veering to NW as the cold front approaches, and beginning to subside/decouple. We'll do a quick update to remove some of the high wind warnings/BLDU advisories, and adjust other parameters as necessary. fire and dust problems will continue through the afternoon into the evening as an upper trough crosses over the Rockies onto the plains then tracks east. As the trough moves east high pressure ridge will build in from the west with calmer wx returning. The upper trough pushing a Pacific front through the area will have a west wind in its wake with much drier air working into the region. Look for much cooler temperatures tonight with lows in the 30s and 40s with highs Saturday mainly in the 60s.
A stationary front ran east from the low east to KOTM, then east northeast passing between KVYS and KC75, and then into northwest Indiana. Temperatures Saturday will be well below normal with readings ranging from the upper 30s in the highway 20 corridor to near 60 in the far south.
An upper level trof will continue to move eastward into the central Plains state today.
fire and dust problems will continue through the afternoon into the evening as an upper trough crosses over the Rockies onto the plains then tracks east. As the trough moves east high pressure ridge will build in from the west with calmer wx returning. The upper trough pushing a Pacific front through the area will have a west wind in its wake with much drier air working into the region. Look for much cooler temperatures tonight with lows in the 30s and 40s with highs Saturday mainly in the 60s.
1028 PM EDT Fri Apr 13 2018 A two prong Western Atlantic ridge extends across the northern and southern portions of the Florida peninsula, resulting in east to southeast winds near 15 knots on our marine district. With the close proximity of a deep layered anticyclone over our area and the central portion of the archipelago of Cuba, significant large scale subsidence will result in extremely dry air over our region.
740 PM EDT Fri Apr 13 2018 High pressure centered off the coast will continue ridging into the southeastern states through Saturday.
930 PM EDT Fri Apr 13 2018 Dry weather is expected tonight under high pressure. Rain chances will increase over the weekend with approaching low pressure.
This is all in response to a vigorous upper level low pressure system movg across the central rockies and adjacent plains states today and tonight. This particular upper level low pressure system will continue to translate eastward across the central plains states through Saturday. The corresponding sfc cold front has tracked across the area with temperatures plummeting. The progged path of this upper level low pressure system suggests slgt chc pops through this evening for most of the fcst area except the southeast Texas Panhandle.
Strong southerly winds into Saturday afternoon will shift to the northwest in the wake of a cold front Saturday afternoon into Saturday evening.
Little change in a high pressure ridge axis extending from the Atlantic to about north Florida.
141 AM EDT Fri Sep 29 2017 High pressure will slowly build in from the west tonight as a cold front stalls over the Carolinas.
140 AM EDT Fri Sep 29 2017 Much cooler and more seasonable temperatures will be with us through the weekend.
1243 AM CDT Fri Sep 29 2017 The upper level low across the Cntl Rockies is forecast to move very slowly north tonight and be located across WY Friday. Cloud cover and the stronger south winds across Swrn Neb should limit vertical mixing and hold down highs in that region to the low to mid 60s.
Ridging to start the day over the area with a sunny morning on tap. A broad upper low thats found its way under the ridge will drift northward across Wyoming and into the area this afternoon providing increased mid and high level cloud cover and a few mountain showers.
245 AM CDT Fri Sep 29 2017 07Z water vapor imagery showed an upper low over Salt Lake City and an upper ridge along the TX gulf coast and lower MS river valley. At the surface, high pressure remained in control over the northern and central plains. For today and tonight, think the surface ridging will be the main factor in sensible weather. In spit of the mid level moisture within the southwest flow aloft, NAM and GFS forecast soundings keep a relatively dry airmass in the lower troposphere. Lows tonight should again be in the lower and mid 50s as winds remain light with a relatively dry airmass in place. Upper ridge shifts eastward through the weekend as the upper trough lifts northeast towards the northern plains.
/26/ Today and Tonight: Drier air continues to filter into the region behind a cold front currently located over south MS and LA.
452 AM MDT Fri Sep 29 2017 Closed low from the past several days has progressed slower than expected through the afternoon and evening hours. The low will continue to fill and drift slowly north, eventually being absorbed into the high latitude flow. Scattered showers and few thunderstorms were ongoing overnight and have ticked up recently, likely due to some remnant forcing moving around the upper low. This is likely due to better lapse rates aloft with the dry slot of the upper low.
631 AM EDT Fri Sep 29 2017 Cold front will progress southeastward through terminals between 14z- 18z or so. Water Vapor/IR imagery depicts an expansive area of clouds in advance of this wave (suggesting rather strong lift with this system), particularly to the north of Southeast Lower Michigan, but also along the cold front. Initial activity will spread through the region with the cold front between 09z-14z or so with a secondary period of enhanced coverage after 16z-18z as daytime heating coincides with expanding upper level cold pool (H5 temperatures as low as -23c over the northern forecast area.
00Z short range models track low pressure se into Lake Ontario by sunset and push the cold front south across central IL during this morning and through southeast IL during early/mid afternoon hours. SW winds ahead of cold front to turn nw behind the front with gusts 15 to 20 mph this afternoon.
A low pressure system tracking east across the Great Lakes today and this evening will send another cold front toward us from the north.
311 AM CDT Fri Sep 29 2017 A cold front has pushed south of the CWA this morning with dry air moving in from the north. An upper level low pressure system, currently over Utah, will move into eastern MT late tonight with WAA showers possible in this CWA.
400 AM CDT Fri Sep 29 2017 Rex like pattern was over the western US with an upper level ridge over western Canada and an upper low over UT. Water vapor loop indicated an upper level ridge over western Canada with a short wave embedded over the northern ALTA/SASK border. Upper level ridge will roll over the area Fri night with ALTA short wave staying north of the area. Rex pattern will shear off as upper ridge moves east ahead of UT upper low. UT upper low will move out into the High Plains of MT late Fri night and into Sat. Cold front will move in from the west for Sun night.
308 AM PDT Fri Sep 29 2017 A weak cold front will bring increased high clouds today followed by dry conditions and near average temperatures for the weekend.
A very weak cold front will stall over our area today with little to no sensible weather accompanying it.
Weak high pressure behind it over the eastern Dakotas with slightly cooler air mass. Lee trough developing from central MT into central WY. Water vapour showed upper low spinning over northeast UT with spoke of moisture bringing virga/-SHRA to far southwest SD early this morning. Today and tonight, upper low moves northeast as cool front washes out and lee trough strengthens. Temperatures will be slightly cooler than yesterday given back door cool front.
High pressure will move out of Canada and across the Great Lakes over the next couple of days. As the cooler and dry air extends down into Mid TN, we will have near normal temperatures with clear to partly cloudy skies.
00z models are in good agreement that this high pressure area will move east southeast today and by 30. Even though high pressure will be building across the Upper Mississippi River Valley today, the combination of residual low level moisture and cold air aloft will result in instability clouds building across Wisconsin from late this morning into the the mid afternoon. With 925 mb temperatures around 6C colder than they were on Thursday afternoon, the high temperatures will likely be only in the 60s today. The low temperatures tonight will range from the lower 30s to mid 40s.
307 AM EDT Fri Sep 29 2017 A weak cold front will drop across the region from the north today but it will be mostly sunny and dry.
07Z water vapor imagery showed an upper low over Salt Lake City and an upper ridge along the TX gulf coast and lower MS river valley. At the surface, high pressure remained in control over the northern and central plains. For today and tonight, think the surface ridging will be the main factor in sensible weather. In spit of the mid level moisture within the southwest flow aloft, NAM and GFS forecast soundings keep a relatively dry airmass in the lower troposphere. Lows tonight should again be in the lower and mid 50s as winds remain light with a relatively dry airmass in place. Upper ridge shifts eastward through the weekend as the upper trough lifts northeast towards the northern plains.
217 AM EDT Fri Sep 29 2017 High pressure will slowly build in from the northwest today as a frontal boundary lingers over the Carolinas.
333 AM CDT Fri Sep 29 2017 Surface ridging conditions along with northeasterly winds will maintain the dry air across the region.
313 AM CDT Fri Sep 29 2017 06Z surface data has a cold front running from central Lake Michigan, across far northern Iowa, and to near KFSD. After sunrise, quiet and dry conditions will be seen across the area as high pressure starts building into the Midwest. Quiet and dry conditions will continue tonight as high pressure builds into the Great Lakes.
Expect VFR conditions to prevail the rest of tonight into early Fri morning even as low to mid level moisture remains high across northeast Mexico into southwest Texas under a 500mb ridge across the western Gulf of Mexico and south TX. A weak ridge is over the local area with a broad pressure field over the Gulf currently supporting moderate northeast winds.
433 AM CDT Fri Sep 29 2017 The cold front is now located near the coast, with light northeasterly winds providing a modest advection of drier air into the area. Dewpoints acrs central LA are in the lower 60s with dewpoints near 70 degrees further south along the I-10 corridor, which is about 4-8 degrees lower than yesterday morning. Temperatures remain rather warm however, ranging from the lower to middle 70s. Aloft, moisture continues to stream acrs TX on southwesterly flow aloft between upper level low pres over northern UT and a ridge over the northwest Gulf coast. Further east, an upper low continues to meander over the northeast Gulf. 24 The cold front will continue to progress southward today, with somewhat drier air filtering in behind it.
Surface wise, a weak trough of low pressure lies near our area with a western Atlantic ridge axis to our east.
The forecast area currently sits between an upper low over the Rockies and H5 ridging to the east. high pressure over the area expected to shift east of the region thru the day allowing for lee-side trough to set up going into the beginning of the weekend.
323 AM CDT Fri Sep 29 2017 Today and Tonight: Drier air continues to filter into the region behind a cold front currently located over south MS and LA.
150 AM EDT Fri Sep 29 2017 High pressure builds in from the west through Friday.
Upper level low along the Florida Panhandle this morning. Light and variable winds will pick up a bit today,especially on the coast as the high pressure over the Tennessee Valley strengthens. Models still don't have the best handle on the development and location of a broad area of low pressure trying to develop across southern Florida though. Have kept the higher chances over the offshore waters, for now.
/issued 938 PM CDT Thu Sep 28 2017/ Updated overnight lows to reflect slightly cooler trends due to a swath of drier air evident on low level water vapor imagery moving over the Caprock.
Precipitation chances are expected to increase from SW-NE today, as difluence aloft increases in advance of an upper low lifting across western WY.
346 AM EDT Fri Sep 29 2017 A cold front will move across the Ohio Valley today.
This low will lift into Wyoming today, keeping the greatest chances for PoPs along our eastern borders today.
Water Vapor/IR imagery depicts an expansive area of clouds in advance of this wave (suggesting rather strong lift with this system), particularly to the north of Southeast Lower Michigan, but also along the cold front. Initial activity will spread through the region with the cold front between 09z-14z or so with a secondary period of enhanced coverage after 16z-18z as daytime heating coincides with expanding upper level cold pool (H5 temperatures as low as -23c over the northern forecast area.
Temperatures will be similar to yesterday and range from the upper 70s to near 80 degrees with low humidity values continuing as weak high pressure remains over the region. Tonight, the pressure gradient will be tightening up, as a reinforcing area of high pressure builds into the area at the surface.
347 AM EDT Fri Sep 29 2017 High pressure will slowly build in from the northwest today as a frontal boundary lingers over the Carolinas.
This pattern should break down over the weekend as the upper high portion migrates eastward and the upper low portion lifts northward, aided by the deeper trough pushing into the western CONUS.
414 AM MDT Fri Sep 29 2017 An upper level ridge of high pressure will be over the region today, allowing for one more sunny and mild afternoon.
This high is forecast to drop southeast into Ontario/Minnesota. High pressure continues to drop south over the central and eastern Dakotas. Current surfaced analysis places modest low over Ontario, and high stretching from the Canadian Prairies into the high plains. Upper level analysis places cut off low over Utah, with ridge over the Northern and Canadian Rockies. quiet weather expected over the area as ridge axis gradually pushes east. quiet weather continues as ridge passes over while aforementioned upper low lifts into the backside of the ridge and opens.
303 AM EDT Fri Sep 29 2017 A cold front will stall to the south of E NC.
223 AM CDT Fri Sep 29 2017 Our region remains under the influence of the upper ridge, despite two upper low pressure systems moving across the nrn CONUS. Trof over the Great Lakes region acting to aid the intrusion of a cooler, drier airmass into our region.
313 AM MST Fri Sep 29 2017 Moisture over eastern Arizona will persist today resulting in isolated showers and thunderstorms over the higher elevations well east of Phoenix.
457 AM EDT Fri Sep 29 2017 WV imagery and RAP analysis indicated mid/upper level troughing over the Great Lakes downstream from a ridge from the nrn Rockies into Saskatchewan. Today, the sct/nmrs -shra over the north should linger through the morning before dissipating in the afternoon as high pressure and drier air builds into the region. Tonight, With favorable radiational cooling conditions as the high builds in, expect min temps near the lower end of guidance with inland readings in the lower 30s and some mid to upper 20s in favored cold spots over the interior west.
Should be another pretty quiet day today with the slight possibility of some showers developing along the higher terrain of the Southern Appalachian mountains during the daylight hours. Temperatures this afternoon look to be a few degrees cooler than yesterday as the trough axis pushes a bit further south over the area.
153 AM EDT Fri Sep 29 2017 High pressure will keep dry weather over the region tonight.
Upper ridge will remain over the forecast area today which will allow warm and dry weather to continue. The upper ridge moves to the east tonight.
648 AM EDT Fri Sep 29 2017 High pressure will slowly build in from the northwest today as a frontal boundary lingers over the Carolinas.
In these areas, lows in the lower to mid 50s look reasonable, due to better radiational cooling conditions with the much lighter winds.
650 AM EDT Fri Sep 29 2017 A cold front will move across the Ohio Valley today.
347 AM CDT Fri Sep 29 2017 Strong upper-level wave pushing through the western Great Lakes early this morning, and high pressure building into the eastern Plains behind the system will continue to suppress a backdoor frontal boundary southward past the Missouri River valley before daybreak. The wave will lift northeast across Wyoming, lowering pressures in the high plains through tonight and increasing southeasterly winds especially west of the James River.
330 AM CDT Fri Sep 29 2017 Currently, an upper level low was over the intermountain west near Utah/Wyoming/Colorado, with an upper level ridge over the Canadian Prairies. At the surface, a large cool high pressure system extended over Manitoba into eastern North Dakota. The Canadian Prairies upper ridge moves eastward and allows the intermountain west upper level low to deepen as it lifts northeastward today and arrives in eastern Montana late tonight. At the surface, a low pressure trough develops in the lee of the Rockies in response to the deepening upper low.
A low pressure system will bring isolated showers and thunderstorms again today, primarily over the eastern portion of Arizona. A low pressure system was centered over southwest Wyoming, heading northward. For today, the position of the low will place weak upward motion and coolish mid-level temperatures over northern Arizona.
349 AM CDT Fri Sep 29 2017 The broad upper trough over the western third of the u.
654 AM EDT Fri Sep 29 2017 WV imagery and RAP analysis indicated mid/upper level troughing over the Great Lakes downstream from a ridge from the nrn Rockies into Saskatchewan. Today, the sct/nmrs -shra over the north should linger through the morning before dissipating in the afternoon as high pressure and drier air builds into the region. Tonight, With favorable radiational cooling conditions as the high builds in, expect min temps near the lower end of guidance with inland readings in the lower 30s and some mid to upper 20s in favored cold spots over the interior west.
Much of the area should see a lull in the convective activity this evening, as the cold frontal convection remains to the northwest of the area.