Aikyam-Lab/Synoptic-Bench huggingface dataset:
450 AM CST Mon Feb 19 2018 Current water vapor imagery indicates a trough across the western CONUS, and a dome of high pressure over the southeast, resulting in continued southwesterly flow aloft over the region. High resolution guidance suggests the development of showers and isolated thunderstorms across the higher terrain to the southwest this afternoon, though activity should gradually weaken as it moves northeastward off of the higher terrain. In addition to the chances for precipitation today, breezy to windy conditions are also expected, especially across the higher terrain and adjacent plains. As the western CONUS trough nears the region on Tuesday, temperatures will cool slightly, though still remain above normal with highs in the 60s and 70s for most.
833 AM EST Mon Feb 19 2018 A frontal boundary south of the forecast area will lift north as a warm front this afternoon.
553 AM CST Mon Feb 19 2018 Busy forecast this morning, dealing with the ongoing freezing drizzle and drizzle. The second round of precipitation develops tonight in response to the trough moving through the central Rockies. Thus, expecting areas of precipitation to develop through the evening, with freezing rain developing. In between along the I80 area, freezing drizzle will develop, which may eventually transition to some sleet through the night. Some light snow could linger in northeast NE Tuesday morning, but mostly, the freezing precipitation should end by 12-15z across the remainder of the area.
530 AM CST Mon Feb 19 2018 A warm front will continue to lift north across the area through the morning, generating scattered showers, and possibly a rumble of thunder. Gusty SSW winds will continue to push warmer and more humid air north across the region as well in the wake of the warm front. The best chance of convection through Tuesday will continue to be across the NW 1/3 to 1/2 of the CWFA in the warm sector ahead of an approaching cold front, that will be approaching our CWFA by early Tuesday evening.
Strong cold front poised to move into northeast OK Tuesday.
/issued 419 AM CST Mon Feb 19 2018/ SHORT TERM (Now through Tuesday): A series of areas of low pressure will continue to develop off the lee of the Rockies in Colorado and eject to the northeast during the next 36 hours. This will continue to keep the gradient tightened and keep the low- level jet strong through the next 24 hours.
The low cigs and areas of fog will then continue through tnt-Tue along with the rain and embedded tstorms. Freezing rain will occur toward central WI at times from this afternoon through Tue. Sfc temp forecasts have also trended warmer reducing the amount of icing. As precip ends from northwest to southeast Tuesday night, there is a chance that the rain will turn to freezing rain for a couple hours as the surface temps drop before the dry air arrives.
1041 AM EST Mon Feb 19 2018 Ridging both surface and aloft across the southern Appalachians with downslope winds of the mountains. Chattanooga Airport, TN 72 56 77 61 / 10 10 10 30 Knoxville McGhee Tyson Airport, TN 71 56 76 59 / 10 10 10 20 Oak Ridge, TN 72 56 76 59 / 20 10 10 20 Tri Cities Airport, TN 71 49 75 52 / 30 10 10 10.
609 AM EST Mon Feb 19 2018 Warm front lifts through this morning with rain. Cold front midweek brings showers and storms. A warm front is making its way through the coal fields, and will continue lifting northward through this morning. Did not make any significant changes to high/low for today and tonight with a very mild airmass moving in behind the warm front. Good southerly flow and building heights across the region will result in temperatures well above normal on Tuesday, with some lowland locations topping out in the lower 80s.
Winds should relax later this morning as the low level jet goes away. Areas impacted by rain will be a few degrees cooler should the activity start up sooner than expected.
944 AM EST Mon Feb 19 2018 A disturbance rounding the high is creating showers over the Atlantic waters and portions of South Florida this morning. /issued 343 AM EST Mon Feb 19 2018/ TODAY AND TONIGHT: Upper level ridge axis currently stretches across the FL peninsula early this morning, with a strengthening low level ridge as the main center moves off the New England coast. Upper level ridge center is expected to become more north-south oriented today. This will allow two disturbances, one located over the NW Bahamas/FL Straits, and another located just to the north of Hispaniola, to rotate into the region today and tonight as they round the base of the ridge. Otherwise, high temps remain 5-10 degrees above normal in the low to mid 80s, with a few upper 80s for interior Collier County.
318 AM MST Mon Feb 19 2018 Upper trof swinging through the northern Rockies this morning. Main snow band has shifted well south as Pacific moisture lifts into the northern Plains ahead of the trof. However expect some scattered snow across eastern Montana today with the instability under the upper trof as it moves across the state. Upper trof remains over the western states through much off the week due to strengthening Bermuda high. Some temperature moderation expected late in the week as the northern portion of the trof weakens, shifting to the flow to westerly. Models suggesting the weakening of the Bermuda high will allow the western trof to shift positions, bringing moisture across the northern Rockies and into Montana.
SHORT TERM (Now through Tuesday): A series of areas of low pressure will continue to develop off the lee of the Rockies in Colorado and eject to the northeast during the next 36 hours. This will continue to keep the gradient tightened and keep the low- level jet strong through the next 24 hours.
420 AM CST Mon Feb 19 2018 Busy forecast this morning, dealing with the ongoing freezing drizzle and drizzle. The second round of precipitation develops tonight in response to the trough moving through the central Rockies. Thus, expecting areas of precipitation to develop through the evening, with freezing rain developing. In between along the I80 area, freezing drizzle will develop, which may eventually transition to some sleet through the night. Some light snow could linger in northeast NE Tuesday morning, but mostly, the freezing precipitation should end by 12-15z across the remainder of the area.
623 AM EST Mon Feb 19 2018 A frontal boundary south of the forecast area will lift north as a warm front today.
827 AM EST Mon Feb 19 2018 Rain and much warmer air will overspread the region today.
1030 AM EST Mon Feb 19 2018 Warm front lifts through this morning with rain. Cold front midweek brings showers and storms. A warm front is making its way through the coal fields, and will continue lifting northward through this morning. Did not make any significant changes to high/low for today and tonight with a very mild airmass moving in behind the warm front. Good southerly flow and building heights across the region will result in temperatures well above normal on Tuesday, with some lowland locations topping out in the lower 80s.
637 AM EST Mon Feb 19 2018 Aviation A low pressure system developing in eastern Colorado will track northeast through the western Great Lakes Region through Tuesday.
Latest radar and satellite imagery indicates the next wave of energy coming down on the backside of an upper level trough. Another inch or two is possible over the higher elevations. Most Valley locations are near or below freezing under clear skies, a cold airmass and light winds.
Isolated to scattered snow showers associated with upper trough will continue today. The showers will decrease tonight and Tuesday in most areas as the trough axis shifts east. However, the snow showers may continue in south central Idaho tonight near the trough axis before exiting to the east on Tuesday.
827 AM EST Mon Feb 19 2018 An anomalous upper level ridge will remain parked off the southeast coast through the upcoming week. At the surface, a warm front will approach Pennsylvania from the southwest today, then push north of the area Tuesday.
905 AM CST Mon Feb 19 2018 Observations and calls around the area indicate that the freezing drizzle is mainly done. There could be some patchy freezing drizzle for a few location along Highway 81, but that should come to an end soon.
Light onshore flow will keep the beaches a good 5 to 10 degrees cooler today. The cooler shelf waters will also allow areas of dense fog to linger near the shoreline into this afternoon. Also of note, isolated showers have developed offshore along an inverted coastal trough. An isolated shower was also over the Ocala National Forest drifting northward along a pseudo-warm front. Backdoor front that slipped down the coast of southeast Georgia may take well into the afternoon hours before lifting back to the north, thus this could keep temps quite a bit cooler with lingering low level cloud cover there through much of the day.
The resultant continental wide (spanning coast to coast) long wave trough of low pressure will place the Northern Rockies under northerly to northwesterly flow most of the time.
/issued 343 AM EST Mon Feb 19 2018/ TODAY AND TONIGHT: Upper level ridge axis currently stretches across the FL peninsula early this morning, with a strengthening low level ridge as the main center moves off the New England coast. Upper level ridge center is expected to become more north-south oriented today. This will allow two disturbances, one located over the NW Bahamas/FL Straits, and another located just to the north of Hispaniola, to rotate into the region today and tonight as they round the base of the ridge. Otherwise, high temps remain 5-10 degrees above normal in the low to mid 80s, with a few upper 80s for interior Collier County.
A trough is over the western half of the country. Through Tuesday the ridge will erode somewhat with the upper trough shifting slightly east.
Ceilings may fall back to persistent MVFR categories this evening as the lower levels saturate back up.
Areas impacted by rain will be a few degrees cooler should the activity start up sooner than expected.
Temperatures will continue to run well above normal with highs in the low to mid 80s, and could even top out in the upper 80s in some interior locations. As for fog, the low level moisture layer is a bit weaker and more shallow than it has been in previous days. Additionally, subsidence will be weaker over the Florida Peninsula since the low level ridge is displaced farther north than it previously was.
Lows will be mainly in the lower 60s. The unusual warmth will develop as a very strong 5900-5950 meter 500 MB ridge develops off the southeast coast while a broad trough forms out west. The strengthening southerly flow between these systems will lift a warm front through the area this morning.
1042 AM EST Mon Feb 19 2018 Mid to upper level ridging over the eastern United States supports an impressive anticyclone centered over the extreme western North Atlantic.
1131 AM EDT Mon Sep 25 2017 High pressure will bring dry and warm weather through mid-week before the passage of a cold front heralds a return to seasonably-cool conditions. Otherwise, the region will remain in a generally-subsident ridging pattern, with strong insolation leading to afternoon temp maxima approaching 90F (given the pre-existing warm airmass evident in the 12Z PIT RAOB).
550 AM MDT Mon Sep 25 2017 Main forecast issues will be how long to keep the rain chances going and temperatures, especially the lows. Slow moving cold front looks like it has finally cleared the forecast area.
1059 AM EDT Mon Sep 25 2017 This morning we find ourselves a rare upper flow from the southeast, between a weak upper low over the lower Miss Valley and a weak ridge over the northeastern US, with Hurricane Maria off the southeastern US coast. Chattanooga Airport, TN 88 64 88 67 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 87 62 88 65 / 0 0 0 0 Oak Ridge, TN 88 63 88 65 / 0 0 0 0 Tri Cities Airport, TN 88 59 88 59 / 0 0 0 0.
A subtle low level trough will swing southward into central sections this afternoon along with the east coast sea breeze developing and moving inland by mid to late afternoon. Made slight adjustments to the weather grids but overall little change to the low convective chances today.
1027 AM EDT Mon Sep 25 2017 An upper level ridge will remain over the region through mid week. Much cooler air will settle into the region by the end of the week. Tonight into Tuesday the 500 mb ridge will finally be squeezed east as Hurricane Maria nudges north.
622 AM CDT Mon Sep 25 2017 The upper level high pressure ridge is slowly losing control of our weather locally.
649 AM CDT Mon Sep 25 2017 A cool and wet day in store for much of the area today, persisting into tonight, as remain situated between slow-moving upper trough over the Rockies, and strong upper ridge east of the Mississippi. Although a bit slower than previous runs, still seeing a good punch of mid-upper level drying move into the forecast area as the upper trough shifts east late tonight. This along with broad downglide on the isentropic surfaces and weak cold advection in the lower levels, should bring a gradual decrease in precipitation through the late night hours. The broad upper trough slides eastward through the Great Lakes through the mid-late week period, while a ridge builds over the western CONUS.
908 AM MDT Mon Sep 25 2017 Temperatures have risen above freezing in the San Luis Valley. Upper level trough continues its slow drift through the Rockies today, with next wave of showers and thunderstorms lifting northward through the eastern plains early this morning. Overall, basically below seasonal temperatures in combination with unsettled meteorological conditions at times expected this week with warmer temperatures then anticipated by this weekend.
Above normal temperatures and dry conditions will persist through the week into the weekend as high pressure continues to persist over the East Pacific Ocean. Overnight temperatures were much warmer than the previous nights. With the upper level ridge axis pushing east towards the West Coast, do expect another sunny and warm day across NW California.
Upper low continues to fill as it moves northeast into central portions of Wyoming. Associated cold front was from southwest Kansas to northeast Nebraska early this morning with temps ranging from 55 at NRN to 73 at SLN. Precipition should generally increase in coverage from northwest to southeast through tonight as the cold front pushes on through, but should see at least isolated activity ahead of it in weak but deep mid-level isentropic upglide.
An upper level ridge, currently along 135 west longitude, will continue to build during the next 24 hours. This ridge will also begin to slowly shift east late tonight. This ridge will keep the Pacific Northwest under a northwesterly upper level into this evening. Conditions will also be dry except for a few showers over the Washington Cascade east slopes and the higher elevations of the Blue and Wallowa mountains.
1105 AM EDT Mon Sep 25 2017 High pressure continues its dominance through mid week.
Scattered showers and storms are still expected this afternoon with the highest coverage along the i-10 corridor. This is providing a east to east- southeast flow in the low levels that is allowing for elevated seasonal temperatures and moisture.
756 AM EDT Mon Sep 25 2017 High pressure will bring dry and warm weather all week. This seems to be upper level moisture feeding off of Maria that is being sandwiched between the ridge dominating just to our northeast and a weak upper low along the Gulf of Mexico coast.
1012 AM CDT Mon Sep 25 2017 Temps warming rather quickly this morning and 12z soundings support high temps in the upper 80's NE to the lower 90's SW. 12z soundings show a convective temp around 87 degrees but considering showers are already developing, it's probably a few degrees cooler. Aloft 500mb heights have dropped a few decameters with the weak upper low over the northern Gulf coast.
957 AM EDT Mon Sep 25 2017 An upper low over the MS/AL coastline is producing just enough instability to produce some low/mid cloudiness over the west coast of Florida this morning. Light east to northeast flow will become more northerly as high pressure lifts northwest of the region.
/issued 410 AM CDT Mon Sep 25 2017/ A Large upper level low pressure system is currently spinning across the western half of the nation and is centered across western Wyoming this morning. Diffluent flow aloft ahead of this low and the right rear quadrant of an upper jet across New Mexico will combine with a moist and unstable atmosphere to produce scattered to numerous showers and thunderstorms today and tonight across west Texas and southeast New Mexico. Beyond today unsettled weather is expected to continue through the work week due to a couple of large and deep upper level low pressure systems residing across the western states.
Huston The low over Wyoming continues to weaken and move away from us. The Frost Advisory remains in place for the Upper Plain as temperatures are dropping into the low/mid 30s in many areas. Clouds will keep increasing from the northwest as moisture spills over the top of a ridge building in from the west. Very light snow is possible on higher peaks and ridges tonight across the central mountains. Temperatures remain 10-15 degrees BELOW normal with highs approaching 60 across the Lower Plain, Magic Valley and around Challis.
Isolated to scattered SHRA/TSRA are expected this afternoon, with the highest chances across south MS, including HBG/PIB. This disturbance was associated with a pesky upper low, which will finally begin to shift southeast of the area over the next day or two.
The lifted condensation and freezing levels are also little changed from the 06z special sounding indicating that the overall thermodynamic nature of the atmosphere has changed little.
Weakening upper low currently located near Riverton, Wyoming and moving slowly to the northeast this morning. Upper level low over southwest Wyoming will drift northeastward today, crossing into the Dakotas by Tuesday. Upper trof axis shifts east tonight with warming and drying trend expected into Tuesday.
A cold front will push through the region, switching winds from southerly to northwest Tuesday afternoon into the evening. There is a weakening cold front approaching the area, but it stays west of the MS river this afternoon. We still have a lot of ridging aloft and the soundings show the potential for enhanced low level drying due to mixing this afternoon. Look for another warm day today, though a few degrees cooler than yesterday, still in the hot category for late September. Medium One last day of abnormal warmth/dew points as approaching cold front likely to generate some shra/tsra.
Other than a brief period of tempo MVFR fog this morning at CHA, VFR conditions expected at all terminals through the period as high pressure remains in control.
618 AM CDT Mon Sep 25 2017 The cold front has now progressed into northwest Wisconsin this morning, having moved slowly across northern Minnesota in the last 24 hours. This is going to bring much more fall like weather to the area, and high temperatures today will be significantly cooler than what we had over the weekend, in some cases by as much as 20 degrees cooler.
622 AM CDT Mon Sep 25 2017 The upper level high pressure ridge is slowly losing control of out weather locally.
744 AM EDT Mon Sep 25 2017 A strong high pressure area will remain over the Mid-Atlantic region through midweek, then diminish and shift eastward. A mainly dry cold front will finally move into the region by the end of week bringing much cooler temperatures. Continued unseasonably warm, dry weather across the forecast area through midweek as a 590+ dm ridge slowly drifts eastward across the northern Mid-Atlantic region.
Upper low continues to spin over the 4 corners this afternoon. Mid level ridge builds over eastern Kansas tonight through Friday while the upper low moves northeast into Wyoming. Lows tonight will drop into the lower 50s. Highs Friday will be a few degrees warmer than today with highs in the mid and upper 70s with the cooler readings in north central Kansas.
900 PM EDT Thu Sep 28 2017 A cold front will move through from the northwest this evening, then stall to the south.
between the upper low spinning over Utah and a mid-upper level ridge centered over east Texas.
Well, what more can you say than "Big bubble, no trouble" for the entire short term as a large dome of high pressure works its way southeast out of southern Canada into the Great Lakes and upper Ohio Valley regions. Overnight lows will generally fall off into the upper 40s to the lower half of the 50s.
Tonight and Friday Scattered showers and isolated thunderstorms are expected as an upper trough and surface cold front moves across the region during the evening hours. Colder air will arrive as the front exists later tonight and will produce lake effect clouds as it moves over the warmer water of Lake Superior. Locations along and east of the Fox Valley should bottom out in the lower half of the 40s.
Mountains will see isolated thunderstorms for the next few hours, as they are closest to the upper low spinning over Utah. On Friday, the upper low currently over Utah is forecast to be moving across northern Colorado and Wyoming. Temperatures will be a few degrees warmer than today's highs.
Upper level ridge will remain in place through Friday afternoon for warm and dry conditions. Satellite showing the next upper level trough with a cold front approaching the Pacific Northwest Coast this evening.
In addition, isentropic lift circulating around Oklahoma will continue to provide cloudiness and rain chances (mostly within the lower range of the VFR category) to the edges of Oklahoma and adjacent parts of Texas through tomorrow.
1052 PM MDT Thu Sep 28 2017 Latest upper analysis shows a Rex block over the western Conus with a low pressure system over the four corners region and a ridge to the north. At the surface, high pressure was located over most of the Canadian and US plains states. The upper low will gradually move northward tonight and then will swing northeastward across the forecast area on Friday night as it become embedded in the next upper trough approaching from the west. The sfc pressure gradient will tighten on Friday aftn as a lee trough develops supporting breezy areas.
1030 PM EDT Thu Sep 28 2017 High pressure builds in from the west through Friday.
828 PM EDT Thu Sep 28 2017 High pressure builds in from the west through Friday.
726 PM EDT Thu Sep 28 2017 High pressure builds in from the west through Friday.
Temperatures are currently sitting in the upper 70s to low 80s with dew points in the low 50s in the north and near 60 further south. Lows tonight will dip into the low to mid 50s.
751 PM EDT Thu Sep 28 2017 A weak cold front moved through the region today.
Water temperatures are in the low to mid 70s across the region, and that 20-degree difference may lead to some steam fog. The cooler, less humid air is here with temperatures ranging through the 70s this afternoon across central KY and southern IN. A dry cold front will move through Friday afternoon and evening bringing a reinforcing shot of cool air.
Wave continues east taking with it the limited cloud cover and replaced by high pressure nosing out of Canada. This high will continue east/southeast into the Western Lakes region for Friday. We begin to see return flow around the high with southeast winds and a breeze setting up due to an increasing pressure gradient (up to 10mb across the state by 00Z). Temperatures will be cooler with less favorable mixing for Friday as well.