Aikyam-Lab/Synoptic-Bench huggingface dataset:
The passage of a cold front will bring scattered showers and isolated thunderstorms to northern and central Nevada on Monday. Temperatures will also be noticeably cooler with daytime readings only in the 70s and 80s. Radar is picking up on light rain showers across northern Humboldt County at this time, and guidance has a slight chance of light rain over generally the northern halves of Humboldt and Elko Counties later tonight as a cold front drops in from the northwest tonight. The passage of a cold front will bring scattered showers and isolated thunderstorms to northern and central Nevada on Monday. Temperatures will also be noticeably cooler with daytime readings only in the 70s and 80s.
1012 PM EDT Sun Aug 13 2017 High pressure over the area moves offshore Monday. Weak low pressure passes to the south Monday night.
As such, did adjust the lows down a few more degrees in places. Elsewhere, low temperatures in the mid to upper 60s look on track, with the higher resolution model still indicating the threat of convection across the area towards dawn. Surface moisture is also rebounding, with dew points currently ranging from the lower 60s north of the Mountain Parkway to around 70 in the south. Dry and pleasant weather will remain in place across eastern Kentucky today and most of tonight, before an area of low pressure finally brings showers and storms back to the area.
857 PM EDT Sun Aug 13 2017 Weak high pressure will hold over the area through mid week. High pressure is across the Mid-Atlantic region tonight.
Issued by National Weather Service STATE COLLEGE PA 835 PM EDT Sun Aug 13 2017 High pressure will move in bringing mainly rain-free weather heading into the new week.
An upper trough is approaching the mid state from the west this evening, with light precipitation already developing west of the Tennessee River.
Issued by National Weather Service STATE COLLEGE PA 1007 PM EDT Sun Aug 13 2017 High pressure will move in bringing mainly rain-free weather heading into the new week.
822 PM PDT Sun Aug 13 2017 The latest water vapor satellite pictures show a short wave pushing through western Oregon as the large upper level low pressure system moves into British Columbia.
904 PM MDT Sun Aug 13 2017 Cold front is currently making its way across the central part of our forecast area and is just entering Treasure County now. Associated cold front is situated out west of our CWA at this time with plenty of shower activity being generated by large scale height falls/vorticity.
944 PM EDT Sun Aug 13 2017 High pressure will build in from the west tonight then slide south of the region Monday into Monday night.
808 PM EDT Sun Aug 13 2017 A narrow band of dry mid level air and subsidence across the south-central peninsula (via water vapor imagery and 00Z Raob data) on the northern periphery of an upper level low moving west through the southern Florida Straits combined with rather warm mid level temperatures (-4 to -5C at 500MB) kept convective development and overall coverage of showers and storms way below normal for August across the forecast area during the afternoon hours. High pressure will continue to extend from the Atlantic west across the southern peninsula and into the eastern Gulf of Mexico the remainder of tonight through Monday with light southwest winds and slight seas continuing through the period.
756 PM EDT Sun Aug 13 2017 High pressure from the Ohio Valley will build across the region tonight.
Chattanooga Airport, TN 74 87 73 87 / 20 70 40 40 Knoxville McGhee Tyson Airport, TN 72 84 71 86 / 20 70 50 40 Oak Ridge, TN 71 84 71 86 / 20 70 50 40 Tri Cities Airport, TN 67 83 67 85 / 20 70 40 50.
An area of low pressure, along with an upper level trough continues to impact the region with mostly cloudy skies and isolated thunderstorms. Upper level ridging will build into the region on Monday with mostly dry conditions expected.
/issued 250 PM CDT Sun Aug 13 2017/ An upper level ridge extending along the Louisiana and Mississippi coastal line is suppressing shower and thunderstorm formation today. Satellite and radar loops show more numerous showers and thunderstorms around the edges of the upper level ridge in Mississippi and in the Louisiana coastal waters. Currently, there is an upper level trough moving through the lower Mississippi Valley.
Winds will increase on Monday as low pressure moves into the area. More Fall-like pattern expected through mid-week as mid-latitude trough over the Pacific Northwest progged to sweep southeast through the Great Basin.
858 PM CDT Sun Aug 13 2017 Another quiet night expected across the area as weak high pressure slowly drifts off to our east by morning. The high will be off to our east on Monday as a weak frontal system, currently along and just west of the Missouri River this evening, shifts east into eastern Iowa northeast through central Wisconsin by Monday afternoon. Temperatures will continue to inch back close to where they should be Monday afternoon as readings rise into the low to mid 80. High pressure is keeping mild and quiet weather in place for the weekend in the Midwest. The highs are mainly in the upper 70s/near 80 yet again today with fair weather cumulus clouds. Overnight, light and mostly easterly winds as the ridge remains anchored in the region.
At the surface, very moist airmass remains over the central and southern Plains with a cold front stretching across nw Nebraska. Storms are expected to develop late this afternoon over the high Plains of eastern CO and track southeast this evening. This will allow a cold front to push through Wed into Wed evening with this front likely having showers and storms tied to it. Pattern looks to remain active through most of these extended periods as broad upper trough remains from the Rockies into the mid/northern Mississippi Valley. Main Aviation Hazard: Stratus potential Most or all of the convection occurring over the high Plains late this evening is expected to remain to the west/northwest of central Kansas.
1214 AM EDT Mon Aug 14 2017 High pressure will build in from the west tonight then slide south of the region Monday into Monday night.
759 PM EDT Sun Aug 13 2017 The area will remain situated between an inland trough and Atlantic high pressure through the week. The area will remain between an inland trough and offshore high pressure at the surface. High pressure will also build aloft. Deep moisture should persist through the period and in general the best rain chances should be across South Carolina closer to low pressure. Probably the main sensible weather highlight this period will be the high heat index values. Heights aloft will be on the rise through the second half of the week as stronger ridging develops across the Southeast.
BMickelson Previous short term discussion: An upper ridge has developed over eastern Montana today, with a cold front extending from an upper low pressure system into the northwestern CONUS and western Montana. This will push the ridge out tonight and dominate our weather through Monday as it pushes across the area. Low temperatures will be mild and should be slightly warmer to the west and southwest, where clouds moving in earlier will prevent as much surface heat loss. The presence of clouds and rain showers will lead to cooler temperatures throughout the day.
Surface wise, a nebulous ridge axis extends across our region, resulting in mostly southeast winds of less than 10 knots. With a ridge from 700 mb and below remaining near our area, precipitation coverage should remain in the isolated category. Under mostly clear to partly cloudy skies but with a predominate light southeast wind, low temperatures should average in the lower 80s.
1143 PM EDT Sun Aug 13 2017 High pressure from the Ohio Valley will build across the region tonight.
941 PM EDT Sun Aug 13 2017 High pressure moves in this evening.
715 PM EDT Sun Aug 13 2017 A steady stream of high clouds will continue over lower Michigan tonight as high pressure drifts eastward at the surface. Weak southerly flow in advance of the approaching low very late tonight and Monday will send a very weak warm front up through the area, with isentropic ascent and moisture just enough over the Saginaw Valley and Thumb to justify a low chance for showers and thunderstorms throughout the day.
642 PM CDT Sun Aug 13 2017 An area of low pressure, along with an upper level trough continues to impact the region with mostly cloudy skies and isolated thunderstorms. Upper level ridging will build into the region on Monday with mostly dry conditions expected.
852 PM EDT Sun Aug 13 2017 High pressure will move slowly east over the next couple of days providing fair weather.
624 PM CDT Sun Aug 13 2017 High pressure is keeping mild and quiet weather in place for the weekend in the Midwest. The highs are mainly in the upper 70s/near 80 yet again today with fair weather cumulus clouds. Overnight, light and mostly easterly winds as the ridge remains anchored in the region.
Light echoes are showing up on radar as an upper trough bears down on Middle Tennessee.
A cold front will bring scattered showers and isolated thunderstorms to much of the area this afternoon along with a period of gusty winds.
The cold front continues to shift southward this morning with gusty northerly winds and slightly cooler air behind the boundary. A weak trough will move southeast across Oklahoma today with resulting northwest winds; however, surface moisture will increase substantially across southeast Oklahoma where isolated thunderstorms may form very late this afternoon or evening before dissipating with sunset.
716 AM EDT Fri May 26 2017 High pressure will pass to the south through tonight.
As low pressure approaches from the west, south winds around 20 mph will gust up to 35 mph. Much of the area wl rmn dry today, except ovr N AR where a developing warm front could set off WDLY SCTD SHRA/TSRA. Instability wl also be enhanced Sat aftn with sfc temps warming well into the 80s and dewpoints in the lower and mid 70s.
1101 AM EDT Fri May 26 2017 A ridge of high pressure is in place across the region today, resulting in a complete 180-degree change from yesterday. Chattanooga Airport, TN 84 65 83 69 / 0 10 30 40 Knoxville McGhee Tyson Airport, TN 81 64 83 67 / 0 10 30 40 Oak Ridge, TN 82 64 84 68 / 0 10 30 40 Tri Cities Airport, TN 77 59 83 65 / 0 10 40 40.
An upper level low over southern ID is moving away from the area but wraparound moisture may trigger a few afternoon showers or thunderstorms along the extreme eastern edge of the CWA. Elsewhere a ridge building offshore will keep WA and OR mostly clear with light N/NE winds.
An onshore flow and cooler than normal temperatures can be expected over the central California interior again today. A ridge of high pressure will build over the district this weekend and bring dry weather, light winds and a day to day warming trend. A major warming trend will begin Saturday and continue through Memorial Day as an upper level ridge of high pressure builds over the Golden State. The buildup of heat this holiday weekend and the available moisture from melting snow over the high Sierra could lead to the development of isolated afternoon thunderstorms near the Sierra crest each day. Hikers should keep this in mind if they're doing some backpacking in the high country this weekend.
Midlevel clouds will start to increase this afternoon, followed by a broken layer around 5 kft this evening as a low pressure system approaches.
Current surface analysis places low pressure along the Saskatchewan/Manitoba border with frontal boundary dipping down near the Red River Valley, while high pressure stretches down just to the east of the continental divide. aforementioned upper low tends to loiter in place keeping cyclonic flow over our area, which may result in some showers developing primarily over northern locations this afternoon into early this evening. Saturday will bring the greatest chances for precipitation to our area as the upper low meanders through Manitoba and a notable short wave swings through the northern plains.
Surface wise, a broad ridge lies over the Sunshine State and the adjacent Atlantic and Gulf waters. With the nearby ridge axis, winds are variable near 5 knots on our marine district. Above this low layer, much drier air (temperature/dewpoint difference of 13 degrees C) is evident near 700 mb. With the mid and upper level trough lifting well north of our region, 500 mb heights have risen to 593 hp which is up 60 dm over the last 24 hours.
1147 AM EDT Fri May 26 2017 An area of high pressure will settle over the Ohio Valley today.
1227 PM EDT Fri May 26 2017 High pressure will bring a brief reprieve of dry, warmer weather today. Upper low continuing to move off to the east, as high pressure nudges into the region. A warm frontal boundary and upper disturbance will move into the region late tonight/early Saturday, kicking off showers and isolated thunderstorms again, becoming more numerous later in the day Saturday.
1044 AM EDT Fri May 26 2017 Weak, dry high pressure will settle into the region today, then drift east off the Florida coast by Saturday. Moisture and unstable conditions will return to the region over the weekend, as a cold front slowly approaches from the northwest. As of 1040 am: Heights will continue to rise today as upper ridging builds into the area then flattens tonight. A relatively tight pressure gradient and lee trough this morning slowly relaxes this afternoon. Still, expect gusts to linger across the peaks and ridge tops and low end gusts develop with mixing elsewhere.
947 AM EDT Fri May 26 2017 Showers will end this morning as low pressure exits. Rain chances return tonight, continuing at times through the holiday weekend with another area of low pressure. The western end is already eroding, and expect this trend to continue as a weak ridging pattern builds in.
850 AM CDT Fri May 26 2017 Quick update for observed trends through 13 UTC and to increase winds towards the higher edge of forecast guidance with peak gusts already between 24-28kts being observed. Current surface analysis places low pressure along the Saskatchewan/Manitoba border with frontal boundary dipping down near the Red River Valley, while high pressure stretches down just to the east of the continental divide. aforementioned upper low tends to loiter in place keeping cyclonic flow over our area, which may result in some showers developing primarily over northern locations this afternoon into early this evening. Saturday will bring the greatest chances for precipitation to our area as the upper low meanders through Manitoba and a notable short wave swings through the northern plains.
950 AM EDT Fri May 26 2017 High pressure building across the Southeast states this afternoon 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. 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.
839 AM PDT Fri May 26 2017 High pressure builds in this weekend.
Winds will become breezy later this morning into the afternoon as low pressure across the southern Plains interacts with Gulf high pressure. /issued 427 AM CDT Fri May 26 2017/ SHORT TERM (Now through Saturday): 500 mb ridge overhead will provide subsidence across Deep South Texas and the Rio Grande Valley through the period. The pressure gradient will strengthen today as low pressure across the southern Plains interacts with Gulf high pressure.
615 AM CDT Fri May 26 2017 Early this morning, a weak ridge stretched from the western Gulf Coast up through the Upper Midwest. However, the weak ridge is losing ground to clouds filtering in ahead of the next system moving into the region. For today, generally the cooler temps associated with clouds between the clouds streaming in from the west and the cu that will develop in any clear spots. Last couple synoptic runs of the models tracking significantly further south with the low itself. keeping much of the warm frontal feature out of Central IL. Significant MUCAPE across the region invof and behind the lifting warm front throughout the day.
1025 AM CDT Fri May 26 2017 A weak cold front is making its way farther south into the forecast area than previously expected. The thick mountain-induced cirrus may help swing things toward the lower speeds, but if that mechanism shuts off by early afternoon, I would expect wind speeds to jump closer to forecast levels.
An upper level low passing by to the south (over southern Idaho) will keep generally BKN skies and showers around across SW MT today.
1002 AM EDT Fri May 26 2017 High pressure will pass to the south through tonight.
High pressure aloft will rebuild over the West this holiday weekend for warmer weather and a shallower marine layer.
Westerly flow will continue across the Idaho and Montana as broad high pressure centered near the Nevada/Utah border slowly grows stronger.
A rather complex surface field was present across the Plains as two areas of low pressure have tried to organize, one coming out of the northern Rockies and the other the central Rockies. At the upper-levels, broad ridging was observed across the central CONUS with a progressive upper-level low beginning to work its way east across the Canadian Rockies. Across Upper Michigan we've remained under surface ridging with mostly clear skies and light winds. The warm front is progged to near portions of Upper Michigan later this afternoon, but the better low-level moisture looks like it will only make it into northern portions of Wisconsin at best. Convection is expected to develop along the warm front and eventually grow upscale into a MCS as low pressure rolls across Wisconsin late this afternoon and through the overnight hours.
Showers and thunderstorms should spread inland through late morning into afternoon as an upper level low pushes into the region. /ISSUED 1048 AM CDT Fri Jul 21 2017/ A weak low pressure trough was along the coast at the surface at mid morning.
A stray shower is possible on the Plateau this afternoon, but the high pressure overhead is so strong that there may only be a few trees in the forest that get any relief from a shower. Winds will be light and variable this afternoon, calm tonight and light again on Saturday as high pressure dominated the mid-state.
Scattered showers and storms continue to fire in the higher terrain locations east of Tucson. This is temporary however as much of the lower cloud cover across the area has eroded and new (more vigorous convection) is forming across the Chiricahua Mtns as well as along the Mogollon Rim. They'll be fighting a bit of a battle as additional dry air (not to mention warmer air aloft) will have moved into the western half of the state by then and how far storms make it before they dissipate is up for debate among the more reliable operational models.
SHORT TERM (Tonight through Saturday Night): Not much change to the short term forecast, as the summertime ridge remains the main influence on local weather. The ridge will continue to produce hot temperatures areawide.
314 PM MDT Fri Jul 21 2017 Water vapor imagery shows the monsoonal plume overhead with thunderstorms popping up over the higher mountains this afternoon. The cold front has passed south through our eastern plains counties, and a more northeast upslope fetch along the Laramie Range should aide in storm development along these mountains. Additional development along the Cheyenne Ridge (I-80 corridor) is still progged by most models through later this afternoon and evening. High temperatures will be roughly 5-10 degrees cooler in the post-frontal environment, and temps aloft will cool a couple of degrees as well. Moist southeasterly return flow will aide in destabilizing the atmosphere some through the afternoon, especially along the eastern side of the Laramie Range and the Cheyenne Ridge.
211 PM EDT Fri Jul 21 2017 Pennsylvania will be on the northern periphery of a subtropical ridge passing across the southern states through the weekend.
355 PM CDT Fri Jul 21 2017 An upper level low pressure area located along and off of the MS/LA coast will shear out and move westward over the weekend.
However, as the mid/upper level ridge to our west drifts slightly to the south tonight, convection across IN may track in a more SE direction and into WV/SW VA late tonight. A weak upper level high pressure ridge will move south through the Mississippi Valley through the beginning of the work week. a weak low level boundary will move south through the Ohio Valley and just to the east of the upper level high pressure.
207 PM EDT Fri Jul 21 2017 A weak cold front moving southward from Quebec may bring an isolated shower or thunderstorm near the international border through this evening.
Once the rain moves off toward midnight, we get into a very light flow regime that will likely lead to IFR CIGS/VSBYS due to very high moisture in the low levels. The low level jet has strengthened to around 35 knots pointing into southwest WI where the 850 baroclinic zone is located. After midnight the low level jet pivots to the east and slides south of the state. Low pressure will move along the WI/IL border on Saturday. Cold air advection will be in place and the low level thermal boundary will have shifted south of the state.
307 PM CDT Fri Jul 21 2017 Upper high positioned just to the west of the mid state this afternoon. Current temps are in the lower to mid 90s, except a few upper 80s along the Plateau. Despite a slight decrease in the strength of the upper high on Saturday, thermal w-e ridging will expand eastward.
As we move into Saturday another steamy day is on tap with maximum forecasts mostly in the lower 90s and heat indices near 100.
334 PM CDT Fri Jul 21 2017 (Today and Tonight) Dry and hot conditions in the short term, with the upper level high pressure still centered over the Mid Mississippi Valley.
VFR conditions will prevail next 24 hours under the ridge in return flow. Most convection will be mainly confined to the higher terrain west of the terminals. /issued 327 AM CDT Fri Jul 21 2017/ Upper ridging continues over the southern half of the country today with thunderstorms continuing to be possible across the higher terrain and surrounding plains this afternoon and early evening. The upper ridge will change positions but will still remain over the region through the next 7 days. Thunderstorms will continue to be possible across the higher terrain and surrounding plains with good moisture remaining across the area.
/19/ High pressure at the surface remains firmly entrenched across the forecast area. Rain chances will be less across the northern and western portions of the CWA, as these areas reside in closer proximity to the mid/upper level high. /19/ Prior discussion below: Today and Tonight: Mid/upper level high center will become situated over the Mid-South region this morning and continue to provide another hot day for much of the area. Some reprieve from the heat does look possible today as a mid level cold core low over FL slowly tries to move in underneath ridge axis. Over the north and west, better influence from the ridge will suppress most convection and give another hot and humid afternoon.
The low level jet has strengthened to around 35 knots pointing into southwest WI where the 850 baroclinic zone is located. After midnight the low level jet pivots to the east and slides south of the state. Low pressure will move along the WI/IL border on Saturday. Cold air advection will be in place and the low level thermal boundary will have shifted south of the state.
1225 PM CDT Fri Jul 21 2017 Upper level ridge of high pressure will remain over the region today into Saturday.
An upper level high pressure ridge still centered over the Mid Mississippi Valley continues to keep a sinking upper level airmass over the area. Daytime heating will form scattered low clouds, but none are expected to break the cap of stability caused by this high pressure area aloft.