Aikyam-Lab/Synoptic-Bench huggingface dataset:
Current surface analysis places trough stretching along the eastern edge of the Rockies, while high settles through the eastern plains into the upper Midwest. Upper level analysis places modest ridge over the northern plains, with trough dipping through the Rockies. Otherwise, a pleasant day is expected with mild temperatures while modest upper ridge remains over the region. Mainly quiet weather continues tonight, though a wave passing to the north may allow some light showers to sneak into northern portions of the area as it pushes upper level level high to the south while a cold front approaches the area.
Chattanooga Airport, TN 83 61 80 59 / 50 50 40 80 Knoxville McGhee Tyson Airport, TN 81 60 74 57 / 70 70 50 70 Oak Ridge, TN 80 60 73 57 / 70 80 60 80 Tri Cities Airport, TN 77 56 71 53 / 70 80 60 70.
Meanwhile, the ern portion of the bndry may linger near or just N of McCurtain County OK later this afternoon before the ongoing MCS weakens, with the placement of this bndry focusing for additional convective development later this afternoon and evening as the small closed low shifts E across Nrn OK this evening.
High pressure building off the coast will bring a warming and drying trend to the district through today. Building high pressure will lead to a rather nice day across the Bay Area.
a cold front will move east through the state. The main cold front will drop south into central sections of the state by late this afternoon. Since the area for best precip potential will be north of the cold front. The cold front that will have dropped to around the I-40 corridor late this afternoon. will remain nearly stationary as this low moves east along this original cold front. As the storm system and new cold front push east by Sat morning. The new cold front will be east of the CWA.
High pressure will bring lighter winds and warmer days through Saturday.
801 AM EDT Fri Apr 21 2017 Shower chances will continue early this morning as a cold front completes its passage. Otherwise, dry weather is expected today under weak high pressure. Rain chances return mainly south of I 70 with weekend low pressure. An update was issued to adjust POPs, mainly for areas along/south of the I 68 corridor where a more widespread area of showers has persisted in advance of the cold front. The front is expected to exit the region by mid morning with dry weather expected the remainder of the day under weak surface ridging. A northern stream upper trough is progged for approach and passage tonight and Saturday as a deepening upper low tracks from the srn Plains to the Upper MS/lwr OH valley region.
Cool air is filtering in behind a departing cold front that passed over Eastern Utah and Western Colorado overnight. Cool dry northwesterly flow will persist over the forecast area on Saturday as a ridge of high pressure slides east over the intermountain west. As the ridge builds over the CWA a brief warming trend will develop. The current satellite water vapor image is showing a ridge of high pressure building over the west coast with a trough of low pressure positioned over the northern Rockies.
High pressure in the western Atlantic ridges west along the Gulf coast today with east and southeast winds. A high pressure ridge axis north of the waters will keep winds east and southeast today but with a gradient relaxed enough to allow an afternoon sea breeze to shift winds to onshore.
Maliawco Synoptic Setup: Short term begins with a series of ridge trough couplets strung out over the northern CONUS and southern Canada. The first couplet starts with a ridge over the Dakotas exiting and a trough over western Montana moving in today. The next couplet has its ridge running from northern California to central British Columbia with the trough just off shore. By the evening hours the trough aloft will create a pulling function on the modified arctic air to north driving it south with an increase in winds across the northern zones. Saturday through Saturday night: Ridge will move into western Montana shallowing out cold air across the region. With minimal mechanical mixing aloft to do the job, cold air will likely stay in place overnight even as the next sub-synoptic ridge passes over.
High pressure will bring light winds through Saturday.
This will be the rule over at least the next 24 hours with an upper ridge building in from the west.
727 AM EDT Fri Apr 21 2017 Shower chances will continue early this morning as a cold front completes its passage. Otherwise, dry weather is expected today under weak high pressure. Rain chances return mainly south of I 70 with weekend low pressure. Isolated to scattered showers should continue early this morning with a crossing cold front. The front is expected to exit the region by mid morning with dry weather expected the remainder of the day under weak surface ridging. A northern stream upper trough is progged for approach and passage tonight and Saturday as a deepening upper low tracks from the srn Plains to the Upper MS/lwr OH valley region.
High pressure over the area will keep the region dry today and tonight. With high pressure moving through far northeast ND over the next few hours, near calm winds will only aid fog development and duration. Expect low temperatures this morning near to just above the freezing mark. This boundary will make for a tight temperature gradient Saturday afternoon from cool and cloudy with highs in the 40s in the north to significantly warmer and highs perhaps into the 60s in the south.
949 AM EDT Fri Apr 21 2017 Low pressure will move slowly east into New England today. The approaching low and a cool onshore flow will provide rain to the region through tonight with some wet snow and sleet possible across the higher terrain near the international border.
935 AM EDT Fri Apr 21 2017 High pressure will remain offshore across the Atlantic today with southeast winds across the area around the Atlc ridge. High level cirrus ahead of an upper level trough across the central Gulf of Mexico should stay mainly across the southern peninsula into late afternoon. High pressure ridge axis to settle slowly southward to across the central FL coastal waters thru the period.
Cold front still on schedule to arrive before 06Z tonight and post-frontal MVFR CIGS are expected. /issued 357 AM CDT Fri Apr 21 2017/ Another unseasonably warm day is expected today, though a strong cold front tonight will provide a break from the heat for this weekend.
1040 AM EDT Fri Apr 21 2017 Atlantic high pressure will prevail through Saturday.
A cold front is expected to begin moving into VCT and LRD areas mid to late Sat morning with light winds shifting to a more northerly direction. The cold front is expected to move through ALI and CRP by late Sat afternoon to early evening with iso/sct SHRA's and a few TSRA's possible. Weak mid level ridging will shift eastward today as the next trough moves out of the Rockies. This trough will bring our next cold front through the area on Friday.
High pressure will dominate conditions for the majority of the short term period - or through the weekend as it were. As high pressure begins to sag southwards, westerly 850mb flow will help to enhance mixing despite light winds Saturday, and temperatures will top out about 5 degrees above average. It will become a warm front as a lee low forms in eastern Montana/Wyoming so it should/probably not effect our weather.
950 AM EDT Fri Apr 21 2017 Canadian high pressure will build SE across the Great Lakes today and remain in place through the weekend. A low pressure system will track across the Ohio Valley Saturday.
High pressure building across the region will give us a brief drying period, before a weak surface front brings rain chances back coastal areas north of a Cape Mendocino through the weekend.
For today, the surface cold front will settle in a southwest to northeast axis across the mid state, which will bring a decent temperature gradient across the area. With the upper low near the mid state Saturday afternoon as well, it looks like heavy rain potential will be slightly higher on Saturday, especially north of I-40 early in the afternoon and later east of I-65.
A cool northwest flow today will be replaced by high pressure on Saturday bringing a warming trend.
1035 AM EDT Fri Apr 21 2017 A cold front will move toward the forecast area from the Ohio Valley and stall tonight across NC.
1212 PM EDT Fri Apr 21 2017 A cold front will move toward the forecast area from the Ohio Valley and stall tonight across NC.
100 PM EDT Fri Apr 21 2017 Canadian high pressure will build SE across the Great Lakes today and remain in place through the weekend. A low pressure system will track across the Ohio Valley Saturday.
They may mix out somewhat this afternoon but the upper trough will linger over the region. Drier air with high pressure will move in tonight. Aloft we still have a sharp mid level trough drifting across the area at midday. There is some clearing across the west early this morning, but the cold air aloft and the trough should conspire to fill that back in with normal diurnal trends. Subsidence and drying in the wake of the trough, coupled with loss of heating will allow things to clear out tonight. Northeast winds by Lake Michigan will keep it cooler there vs west of Madison today.
1211 PM EDT Fri Apr 21 2017 Low pressure will move slowly east into New England today. The approaching low and a cool onshore flow will provide rain to the region through tonight with some wet snow and sleet possible across the higher terrain near the international border.
A cold front will turn winds to the north tonight, with the front moving through KABI around 03Z, KSJT and KBBD around 06Z, and the I-10 corridor between 08Z and 09Z. This deepening low pressure will keep south to southwest winds gusty across our area today. As the low moves east this afternoon, a dryline will push east into our western counties, which will aid in warming today. The cold front is expected to be near or south of I-20 by 10 PM, and into or through the Concho Valley by 1 AM. The best chances for anyone seeing any precipitation will be along the cold front tonight, mainly east of a Haskell to Junction line, where they may possibly be enough moisture to result in some showers and thunderstorms.
902 AM PDT Fri Apr 21 2017 High pressure aloft near the West Coast will bring dry and warmer weather through Saturday with well above average high temperatures on Saturday except near the beaches.
A series of weather systems coming in off the Pacific will bring back cooler weather Saturday, with periods of rain lasting through at least mid week.
950 AM CDT Fri Apr 21 2017 Regional sfc analysis at 14z showed warm front extending from approximately southern Sebastian County eastward to just south of McAlester. There will be at least some tornado potential as the storms interact with the effective warm front. Short wave trough axis will be over northeast Oklahoma tonight, which will drive the boundary south and bring an end to the rain by early Saturday morning.
/issued 439 AM CDT Fri Apr 21 2017/ Stratus and patchy fog once again shrouding the area early this morning, as southerly flow around a low/mid level ridge over the SE CONUS continues to result in a very moist nocturnally cooled boundary layer. Changes are on the horizon, however, with guidance remaining in good agreement with the timing/progression of a cold front expected to push through the area on Saturday. The boundary is progged to be on the doorstep of interior E TX Saturday morning, and should be exiting the Lower Atchafalaya region by early/mid evening. Temperatures during the day are expected to warm quite nicely as low level wind profiles veer toward the west, with NW winds and the real push of much cooler and drier air overspreading the area during the evening and overnight hours.
437 AM PDT Tue Oct 24 2017 Expect mild, dry conditions through the week, as high pressure builds into the Pacific Northwest. The ridge will be briefly interrupted by a fast moving weather system Wednesday. A flat ridge of high pressure will be over the region today for warm and dry conditions. Some high level moisture will be able to get over the ridge for scattered high clouds along the Canadian border through the day. The ridge flattens out tonight in response to a fast moving disturbance that just clips the northeast zones on Wednesday. High pressure rebounds quickly Wednesday night and this will put the area in a dry but cooler northerly flow.
The very warm October continues today with record or near record highs for the lower deserts. A few spots may end up a degree or two warmer than forecast but for now will not make any changes to the temp fcst.
727 AM EDT Tue Oct 24 2017 A strong upper trough will bring a few showers to the mountains this afternoon and again Wednesday, along with cooler temperatures to the area. High pressure builds back in to close out the week with temperatures warming back to above normal. Another cold front impacts us this weekend. Deep upper trough from the Great Lakes to the TN Valley shifts slowly east today.
The strongest winds are forecast through the lower Colorado River Valley, particularly near Laughlin and Bullhead City. The lake wind advisory and red flag warning for the lower Colorado River Valley continue, expiring at 6 pm PDT/MST. High pressure building over the area will bring dry, windy and warm conditions through much of the week.
Will probably have the highest winds earlier in the day, before the gradient begins to slacken and mixed layer winds diminish somewhat in the afternoon. Otherwise, it will be a cooler day with highs in the upper 40s to mid 50s.
525 AM MDT Tue Oct 24 2017 Deep cyclonic flow sits across the western half of the CONUS while strong upper ridging has built into the western half. A quiet day is expected today with slightly warmer temps than yesterday. Warm air advection will push in from the west tonight into Wednesday with much warmer temps expected. possibly just reaching into the low 80s.
Patch of mid and upper level moisture and clouds should gradually dwindle as an upper level speed max steers east into the lower Mississippi Valley later this morning. Surface pressure troughing will develop in response to height falls upstream on Wednesday.
A ridge of high pressure will be centered directly over the forecast area today. The ridge will begin to slowly breakdown tonight as the pattern transitions to more of a westerly flow. especially in the lower valleys and basins.
1050 AM EDT Tue Oct 24 2017 Much anticipated cold front lies just south of EVB-BOW line late this morning accompanied by considerable stratus along and behind the boundary. As is typical with frontal passages here in central FL, the lower dewpoint (drier) air arrives first with the cold advection lagging by some hours. Period of IFR/MVFR CIGs along and just behind the cold front which stretches roughly from TIX-BOW. Cold front is currently pushing southeast across the northern waters assocd with a wind shift out of the N/NW around 10 knots. 50 DEGREES 60 DEGREES 70 DEGREES DAB 04-09-2017 05-27-2017 06-03-2017 FPR 04-08-2017 05-08-2017 05-28-2017 VRB 04-08-2017 05-08-2017 06-16-2017 MLB 04-08-2017 05-08-2017 05-28-2017 MCO 05-07-2017 05-27-2017 06-28-2017 SFB 04-09-2017 05-07-2017 05-28-2017 Here are the last dates that the high temperatures failed to reach 80 degrees.
Issued by National Weather Service NASHVILLE TN 1030 AM CDT Tue Oct 24 2017 Latest visible satellite imagery show clear skies across most of the Mid South but clouds are beginning to move into northern zones as a potent upper trough swings into the region per water vapor imagery. HRRR model runs continue to depict widely scattered showers breaking out this afternoon across far northeast Arkansas and the Bootheel into western Tennessee as trough axis moves across, and will leave a low pop in across the northeast half of the forecast area. /issued 259 AM CDT Tue Oct 24 2017/ A potent upper trof will move into the Mid-South today.
a longwave trof was centered from the Great Lakes region southward to the Gulf Coast States while an upper level ridge axis was building over the West Coast. Eastern Oklahoma and Northwest Arkansas was observing mostly clear conditions within northerly flow on the backside of the longwave trof. the longwave trof as well as the upper level ridge are expected to become more amplified allowing the upper level jet to speed southward across the Central U. A cooler airmass within the northerly flow will aid in afternoon temperatures today to be 10 or so degrees cooler compared to yesterday even with mostly clear skies. warmer temperatures back in the 60s/lower 70s will be possible.
1017 AM EDT Tue Oct 24 2017 A chance for showers will continue today and into Wednesday, as a trough of low pressure remains centered over the Great Lakes. High pressure will move into the area late in the week, with a slight increase in temperatures.
Northerly flow aloft, along with unidirectional winds in the lower levels will produce breezy conditions across the region today. The strongest winds will occur east of the I-29 corridor, closer to the low pressure system. This system will draw warmer air into the area with high temperatures likely reaching the 60s and low 70s.
/issued 319 AM CDT Tue Oct 24 2017/ A broad upper trough is centered over the Upper Midwest and extends southward towards the Gulf of Mexico. A cold front is pushing through the area with northeast winds. High temperatures today will be much cooler behind the front with highs mostly in the 60s and 70s. Temperatures will begin warming back up on Wednesday as the upper trough moves further east and southwest winds return to the area.
1127 AM EDT Tue Oct 24 2017 Low pressure will maintain shower chances and cool temperatures through mid week.
strong H5/H7 over the western portion of the country and a cutoff upper low over the east will accompany the aforementioned surface features. H5/H7 ridge axis will work south and east off the Rockies by 12z Wednesday. ridge axis over the central Plains and will provide the region with dry conditions and above normal temps of which will be 20 degrees above normal.
High pressure aloft will provide dry weather today.
Temps will be cooler today with highs in the 40s for most as a few 50s are possible in the west. Bumped up high temperatures to go toward the higher side of guidance, especially in the Red River Valley.
A 40-50NM wide band of AC with cigs near 13kft continues to rapidly sink SSE across E TX/N LA this morning, beneath a longwave trough centered over the Plains/MS Valley. This trough axis will quickly shift SE out of the region this morning, with SKC prevailing through the remainder of the TAF period under a dry NW flow aloft and in wake of an associated cold frontal passage. Winds will diminish to around 5kts shortly after 00Z, while backing more WNW as sfc ridging sinks SSE into Cntrl/S TX. /issued 418 AM CDT Tue Oct 24 2017/ A cold front continues to progress southeast across the area this morning and should exit the CWA by late this morning. Wednesday will likely remain cooler than normal with winds being much lighter than today.
Warm and dry weather will persist across northwest California this week as high pressure dominates the weather pattern. Warm and dry weather will persist through the rest of the week as upper level ridging dominates the pattern.
Another cold front set to move through the area and will bring low CIGs to TYS and TRI.
A broad swath of moderate rain across northern Illinois will get some push southward through the early afternoon as the deep upper low pulls off to the east. 07z/2am water vapor imagery shows a deep upper trough in place over the Great Lakes/Upper Midwest. The prevailing upper trough will begin to shift eastward out of the region tonight, with lingering showers coming to an end across east-central Illinois during the early evening. Despite the clearing and overnight lows dropping into the lower to middle 30s, west winds of 8-10mph will prevent frost formation. with highs in the lower to middle 50s.
651 AM CDT Tue Oct 24 2017 As of 3AM this morning, the Great Lakes low pressure system was lagging in deepening as much as we had anticipated at this time, and peak winds overnight have remained around 25-35 MPH. The low is quickly deepening though, and should continue on a northwestern path over the next few hours.
1055 AM EDT Tue Oct 24 2017 A dry cold front will move through NC tonight.
An upper low to our north will continue to pull in cooler air and bands of low and mid level clouds. temperatures will struggle to climb and should only reach into the lower 60s across most valley locations. Chattanooga Airport, TN 63 40 57 38 / 10 0 0 0 Knoxville McGhee Tyson Airport, TN 62 39 54 37 / 10 10 0 0 Oak Ridge, TN 62 39 53 37 / 10 10 0 0 Tri Cities Airport, TN 62 36 51 34 / 10 0 10 20.
A weak cold front has slipped through the northern half of the CWA and will continue south through the remainder of the CWA through the early morning.
1152 AM CDT Tue Oct 24 2017 Temperatures at 2 AM were ranging from the upper 40s to low 50s with fairly dry air and dew points in the low to mid 30s. Water vapor shows a deepening trough over the central U. and a fairly strong upper level jet streak south from Manitoba across the plains and rounding the base of the trough along the MO/AR border. 850 mb plots were showing 40-45kts over the upper MS valley and plains to the west of the low which was over the UP of Michigan.
Even with plenty of sun today, breezy northwest winds (especially in the southeast, although weaker than the last few days) will keep temperatures a bit cooler in the 40s or low 50s. Temps will be cooler today with highs in the 40s for most as a few 50s are possible in the west. Bumped up high temperatures to go toward the higher side of guidance, especially in the Red River Valley.
Despite the strong CAA, sunny skies will still help temps rise into the low to mid 50s. Wednesday, temperatures will quickly rebound as the upper trough shifts east through the Ohio River Valley and northwest flow across the region transitions to downsloping westerly flow. Expect highs in the lower 60s east to near 70 west.
Clear skies and light winds have allowed temperatures across the TN Valley as of 08Z to drop into the lower 50s to upper 40s. With northwesterly winds 10-15 mph and gusts 20-25 mph streaming cooler air into the TN Valley, daytime highs will only reach the lower 60s despite the sunshine. High pressure will begin to build into the region Tuesday night allowing for calm winds and mostly clear skies through the night. Wednesday's daytime highs will be cooler with highs reaching the upper 50s and lows in the upper 30s/lower 40s.
852 AM EDT Tue Oct 24 2017 Sfc cold front is over the southeast part of our area with shallow northwest flow in its wake and cooler/drier air filtering in. Broad mid/upper level trough is located from Great Lakes southward to the central Gulf of Mexico.
/issued 320 AM CDT Tue Oct 24 2017/ One cold front along the Atlantic coast, with the reinforcing cold front near a Louisville, Kentucky to Monroe, Louisiana line at 2 am.
A large upper level trough will continue to move into the area today. As this upper trough continues to dig southward toward the Gulf coast states today, single digit air at 850mb to our northwest will continue filtering into the area with gusty westerly winds at the surface. During the morning hours, we will see intermittent cloudiness as the upper level low in IL moves into IN by afternoon. During the evening and overnight hours, we will see the clouds gradually shift eastward as the main upper trough continues to move eastward. On Wednesday, we will be on the back side of the upper trough in strong northwest flow.
Patchy frost will be possible in typically cooler/sheltered locations across the northern counties, but confidence/coverage is too low and temperatures too marginal for a frost advisory at this time.
Huston Dominant upper ridge is in place over the coastal states giving us a northwesterly flow aloft.
/issued 259 AM CDT Tue Oct 24 2017/ A potent upper trof will move into the Mid-South today.