Aikyam-Lab/Synoptic-Bench huggingface dataset:
404 AM CDT Mon Apr 13 2020 Today and Tonight: Cooler and dry through the period. The limited insolation and caa in the wake of the cold front will result in a cooler than normal day with afternoon highs only in the 50s over our delta region and in the 60s over much of the area. Our southeast zones should climb into the lower 70s before the fropa though. Under mostly clear skies and a light north wind, temperatures will bottom out in the low to mid 40s for much of our CWA. /22/ Tuesday through Monday: The forecast period will start off tomorrow with a large mean longwave trough draped across the entire CONUS. Temperatures will be seasonably cool with highs in the low 60s to low 70s and overnight lows dipping into the upper 30s to mid 40s.
Areas in the northwest will be in the 60s while southeastern areas will still top out in the low 80s.
743 AM EDT Mon Apr 13 2020 Crossing low pressure will generate showers and a few thunderstorms, as well as windy conditions today. Meanwhile across the foothills, especially near LBE, downslope wind is assisting in a sfc temperature uptick to near 70 degrees given a strong llvl jet overhead and southeasterly wind across the ridges. As such, counties north of Pittsburgh were added to the High Wind Warning overnight given the latest trends of pressure rise (~10mb/3hr) and especially the magnitude of the low level jet stream which any convective element may mix to the surface through this morning. The secondary threat is potential for severe weather with the aforementioned convection ahead of the front given extremely high deep layer shear (primarily linear) on the flank of the low crossing Ohio.
An upper level ridge is located offshore with a longwave trough to the east. In the valleys for Jackson and Josephine Counties, expect temperatures in the mid 30s with brief freezing conditions possible in the southern Illinois Valley. Of note, at the coast, a surface thermal trough will bring continued mostly clear skies and breezy to gusty north winds in the afternoons/evenings.
403 AM MDT Mon Apr 13 2020 Strong Omega block over the EPac and downstream ridging off the E. Temperatures in the Unco/Lower Gunny Basin and Grand Valley have touched freezing or below in many areas. The gap wind and higher elevation areas are staying a bit warmer as is much of east- central Utah. The leading edge of a colder trough is dropping through Wyoming early this morning and will rotate through our CWA today. Lows looks to drop into the lower half of the 20s over much of the fruit bearing areas of W. The cold vortex in the Upper Great Lakes region will begin to lift into the higher latitudes by mid week but we remain in northerly flow thanks to the upstream block.
503 AM MDT Mon Apr 13 2020 Anonymously deep/cold upper level trough will continue to bring unseasonably cold, unsettled, and breezy conds to the region the next few days. The best chance for snow showers will be over the higher terrain of NE WY and the Black Hills with isolated activity across other locations. Slightly warmer temps expected.
/issued 333 AM CDT Mon Apr 13 2020/ Prefrontal trough with all inclement weather has moved east and the cold front is now moving through the area denoted by a thin line of clouds and temps dropping from the mid 70s to the mid 60s.
Below normal temperatures will continue through much of the week as the central half of the country remains under the influence of broad upper trough and reinforcing shots of cold air. Several disturbances will rotate around the low with the first of these digging into the intermountain west and Great Basin on Tuesday. Any precipitation would be dependent on the lower levels being able to saturate down to the surface and given a dry surface airmass, it may take some time for the boundary layer to saturate.
The strong pressure gradient that produced the gusty winds is subsiding as high pressure increases from the west today.
An upper trough axis moves across the CWA this evening with more west-northwesterly flow aloft by 12Z Tuesday morning. The low level winds are progged to remain northeasterly across the plains and foothills through this evening. Temperatures remain well below seasonal normals today, with highs even a tad cooler than yesterday's. Snow should be out of the area Tuesday morning, except for some lingering flurries on the ridges.
The Canadian cold front is currently pushing through South Texas, having made it to Corpus Christi as of writing. Moisture will gradually return to the lower levels as H925-H85 winds turn more out of the south-southeast tonight. Not too much of a change in temperatures for Tuesday, with maybe 1 to 3 degrees warmer in some spots. A weak cold front will push through the area Tuesday night with a following reinforcing high pressure.
Dry warmer weather is expected to prevail through mid week. An upper trough may generate isolated showers over the mountains toward the end of the week. Interior valleys will warm into the 70s to lower 80s, while coastal areas stay much cooler in the mid 50a to mid 60s.
For Florida, we have an upper-level ridge to our south, and this well help stall the frontal boundary over northern Florida. High pressure will remain across southern Florida for the first half of the week as a cold front moves into northern Florida.
549 AM MDT Mon Apr 13 2020 Strong Omega block over the EPac and downstream ridging off the E. Temperatures in the Unco/Lower Gunny Basin and Grand Valley have touched freezing or below in many areas. The gap wind and higher elevation areas are staying a bit warmer as is much of east- central Utah. The leading edge of a colder trough is dropping through Wyoming early this morning and will rotate through our CWA today. Lows looks to drop into the lower half of the 20s over much of the fruit bearing areas of W. The cold vortex in the Upper Great Lakes region will begin to lift into the higher latitudes by mid week but we remain in northerly flow thanks to the upstream block.
640 AM CDT Mon Apr 13 2020 In the wake of yesterday's winter storm system, breezy northwest winds will continue to usher in chilly Canadian air as a Canadian high pressure slides southward down the Plains.
/issued 345 AM CDT Mon Apr 13 2020/ WV imagery shows zonal flow aloft over West Texas and Southeast New Mexico, in the wake of yesterday's upper trough that wreaked havoc across the southeastern CONUS. Mesoanalysis has the cold front that moved in behind the trough banked up against the higher terrain, w/a temp of 33F at KTAT. Borden and Scurry look to stay above freezing, but we'll leave them in the warning, as they were in the previous one, and it'll be a close call. Forecast soundings over the higher elevations of the Guadalupes mix to around 625mb or better this afternoon, and elevations abv 7Kft could see marginal high winds into the early evening. Temps will rebound to near-normal Thu afternoon, but, unfortunately, another cold front is on tap Thu night, setting back temps Fri afternoon.
Low temperatures drop into the low teens to low 20s. It will be warmer with high temperatures ranging from the low 40s in far eastern Colorado to the mid 40s to around 50 elsewhere. Low temperatures are expected to be in the low to mid 20s.
A much cooler airmass will remain in place through much of the week, leading to below normal temperatures. The clouds will also make temps a little tricky tonight but in continued low level CAA, think they will at least make it down into the low to mid 30s. Will go ahead and issue a freeze warning across about the northern half of the area, where temperatures should have the best shot at dropping to or a little below freezing overnight. With lighter winds, areas of frost/freezing conditions will be possible.
1245 PM CDT Mon Apr 13 2020 In the wake of yesterday's winter storm system, breezy northwest winds will continue to usher in chilly Canadian air as a Canadian high pressure slides southward down the Plains.
This has kept temperatures south of I-70 a degree or 2 cooler in comparison to areas further north. As surface ridging settles into the area tonight, expect winds to decrease to below 10 MPH by 8 PM. Even with increasing cloud cover, a very dry low-level atmosphere should allow for rapid cooling after sunset with overnight lows ranging from the low 20s near the NE border to near 30 along I-35. Quiet weather should continue into Tuesday as the main midlevel trough axis associated with the midlevel low across the Great Lakes swings through the area. Forecast soundings depict increasing midlevel saturation as the trough axis swings through. Afternoon highs should reach the lower 50s.
236 PM MDT Mon Apr 13 2020 With the upper short wave trough exiting the region and colder air persisting at the surface, a little light snow may continue through the overnight hours across far east central Colorado into extreme west central Kansas from late this afternoon into the overnight hours.
Models remain consistent in re-enhancing snow/snow showers across northern New Mexico and the Texas Panhandle heading into the evening hours as a short wave trough exiting the Great Basin early this afternoon moves southeastward this evening and then eastward late tonight through Tuesday. Set up, especially with winds expected to veer slightly toward east/southeast for the most of the area, combined with increasing cloud cover point to warmer end of guidance, but potential for cooling with precipitation will offset mainly across the north. Temps aloft favor snow, so once surface and near surface temperatures approach freezing, snow should be the main phase.
Cold front is slowly making its way across Middle Tennessee, and is creating some gusty winds as they shift to the northwest.
Expect this drier air to begin to win out by this evening, and help to break up some of this lower cloud cover. High pressure at the surface will shift northeast of the region over the upper Ohio Valley, with a prevailing NNE flow helping to maintain a very cool air mass.
As yesterdays potent system impacts portions of the eastern seaboard this afternoon, large-scale long wave upper troughing now dominates the CONUS, with an omega-blocking-like ridge off the west coast in the northeast Pacific. After lows tonight in the 40-52 degree range, another day of highs in the low 60s north to potentially low 70s south is expected.
Temps will get up into the 60s across North GA and into the lower 80s across central portions of the state Tuesday.
Slight Chc of RA/SN mix will be possible over the higher elevations of the Ozarks by early morning. At the surface, high pressure will approach the region, serving to inhibit appreciable precipitation development. rates will be on the lower side. However, a light dusting of snow will be possible where low temperatures dip to or below the freezing mark, mainly in the highest elevations of AR. In addition to some light wintry weather, a freeze warning is in effect overnight across north central AR where temperatures may dip to or slightly below freezing. Shortly after sunrise, temperatures will quickly warm above freezing and any lingering precipitation will transition over to light rain. High pressure will settle into the region on Tuesday and Tuesday night with dry conditions expected.
243 PM CDT Mon Apr 13 2020 We remain in a cold Spring weather pattern under the influence of an upper trough encompassing the interior CONUS, while at the surface, high pressure was building south along the high plains. On Tuesday the upper trough will edge eastward allowing the airmass to moderate several degrees. While still well below normal for this time of year, high temps should be roughly 5-10 degrees warmer than today. Near critical fire weather conditions are possible for several hours Tuesday aftn for locations in north central KS and areas along and south of Highway 6 in Nebraska where low relative humidity values are forecast in the low 20th percentile.
1225 PM CDT Mon Apr 13 2020 With high pressure in control, VFR conditions are expected to prevail through the period. A Canadian cold front that moved through overnight will keep winds gusty through the late morning with the pressure gradient relaxing in the afternoon. This is due to a secondary surge of surface ridging brought about by a sharpening northerly flow pattern aloft.
112 PM EDT Mon Apr 13 2020 Showers will end with crossing low pressure, with windy conditions likely through this evening. Regional radar mosaic suggests widespread showers quickly trekking east across the forecast area in association with a crossing cold front. Cold, dry advection in the wake of the front should end widespread precipitation chances later today, with steep low- level lapse rates maintaining a stratocu deck through the period under upper troughing. In the wake of the cold front passage, a tightening sfc pressure gradient, 50-60kt low level stream, increased mixing, and 3 hour pressure rises of 10mb are all anticpated.
Despite the return of afternoon sun, temperatures continue to struggle to reach the freezing mark thanks to the fresh snow cover. Despite the light winds, temperatures should drop down into the lower and middle teens. Temperatures will struggle once again to climb above the freezing mark.
317 PM EDT Mon Apr 13 2020 An upper trough, centered over the Plains, covers the CONUS. At the surface, the CWA sits behind two cold front with the closest located over eastern Kentucky. To the west, high pressure is centered on the Kansas/Oklahoma state line. Tight pressure gradients between this high and a low over eastern Canada were the force behind the gusty winds this morning. Skies will continue to scatter as the high moves east building over the Ohio Valley.
Temperatures remain well below normal overnight into Tuesday as well with nearby thermal trof staying in place.
356 PM CDT Mon Apr 13 2020 A much different day was in store for southeast Texas and southern Louisiana behind the cold fronts that moved across the region late yesterday and this morning. Tonight temperatures are going to be running about 20 degrees cooler with lows in the 40s for cntrl La and near 50s down along the I-10 corridor.
233 PM EDT Mon Apr 13 2020 Much cooler air on gusty winds will move in this evening and stay in our area through the week.
Current radar imagery shows a line of showers and storms draped across much of central Kentucky ahead of an advancing cold front. Given that gusty winds and clouds will be in place for a good portion of the day, expect afternoon highs to feel a bit cool, as they only rise into the low to mid 50s. Overnight lows will also be noticeably cooler, as temperatures fall into the mid 30s. Broad trough rotating around Hudson Bay will keep our weather cool this week, with some subtle impulses moving across the Ohio Valley. A strong cold front continues to push across the Ohio Valley. Otherwise, expect gusty winds to lessen and ceilings to return to VFR levels at all TAF sites this afternoon as the pressure gradient relaxes and the cold front departs the region.
Lows tonight will range from the upper 30s far north to the low 50s far southeast.
329 PM EDT Mon Apr 13 2020 Synopsis/Discussion/Marine - Wind decreasing tonight - Cold with a chances of light snow/mix this week -Wind decreasing this evening Peak wind gusts of 45 to 50 mph occurring this afternoon and expect a few more hours before mixing height lowers this evening and tight surface pressure gradient relaxes as the low pulls off to the northeast.
303 PM EDT Mon Apr 13 2020 A residual front lingers across the Florida Panhandle with high pressure to the east over the western North Atlantic.
The snow will be moving out of the forecast area around or after sunrise on Tuesday with decreasing clouds during the day as the axis of the upper trough moves through the region. High temperatures will range from the lower 40s in the southwest to the lower 50s over central Kansas, where more sunshine will be noted during the day.
Tonight and Tuesday Surface analysis at 19Z showed the low was in southwest Quebec and continued to move east. Cooler air will remain in place with highs well below normal, in the lower to middle 30s.
For Florida, we have an upper-level ridge to our south, and this well help stall the frontal boundary over northern Florida.
Current radar imagery shows a line of showers and storms draped across much of central Kentucky ahead of an advancing cold front. Given that gusty winds and clouds will be in place for a good portion of the day, expect afternoon highs to feel a bit cool, as they only rise into the low to mid 50s. Overnight lows will also be noticeably cooler, as temperatures fall into the mid 30s. Broad trough rotating around Hudson Bay will keep our weather cool this week, with some subtle impulses moving across the Ohio Valley.
Some guidance is producing some very light precip (flurries/sprinkles) over parts of southern MO tonight into Tuesday morning, but with so much dry air to overcome in the lower levels, it will be tough to see much measurable precip and impacts. The cloud cover will keep temperatures from really bottoming out tonight, but even with just the air mass alone with cloud cover we will see temperatures near or just below freezing. Clearing Tuesday night will allow temperatures to fall aob freezing in many areas again and frost/freeze headlines will likely be needed.
1150 AM MDT Mon Apr 13 2020 Strong Omega block over the EPac and downstream ridging off the E. Temperatures in the Unco/Lower Gunny Basin and Grand Valley have touched freezing or below in many areas. The gap wind and higher elevation areas are staying a bit warmer as is much of east- central Utah. The leading edge of a colder trough is dropping through Wyoming early this morning and will rotate through our CWA today. Lows looks to drop into the lower half of the 20s over much of the fruit bearing areas of W. The cold vortex in the Upper Great Lakes region will begin to lift into the higher latitudes by mid week but we remain in northerly flow thanks to the upstream block.
The large broad scale troughing currently engulfing much of the country will gradually relax this week as the upper level low near Lake Winnipeg moves east/northeast. However, the upper level will still generally out of the northwest with some short wave troughs expected to move across the region later in the week.
Temperatures will fall into the 30s again over region, possibly flirting with the freezing mark in the Big Country and northern Concho Valley. Temperatures, however, for the most part, should remain a couple degrees above freezing, as skies become cloudy. The cloudy skies, developing from overriding low to mid level moisture over cooler air at the surface, should limit nighttime radiational cooling. Still, a few areas in Sterling County northward to Sweetwater may briefly hit the freezing mark.
Mixing will not be as strong on Tuesday with somewhat warmer air advecting in from the southwest.
148 PM EDT Mon Apr 13 2020 A cold front will move through today.
336 PM CDT Mon Apr 13 2020 Tonight & Tuesday: Tonight: As cold core low swings east-northeast into Canada, expect the strong low pressure system to swing northeast into eastern Canada. This will keep continued surface ridging & continued cold advection around into the overnight hours. Due to dry air, expect a much cooler night with some lingering northeasterly winds. Lows will predominately stay near 5-10 degrees below normal in the low 40s to the north to mid-upper 40s elsewhere. /DC/ The region remains under the influence of a high pressure ridge through midweek. The CONUS is dominated by a broad trough aloft, with weakly southwesterly flow in place at 500 mb over much of the south.
Weak SFC/LL high pressure will largely dominate the area through late week, but bits of energy/moisture source will be scraping the area in the upper flow. By Sun night, sharp upper trough moves into the region. Probably even freezing temps Wed morning many locations.
238 PM CDT Mon Apr 13 2020 Upper pattern has a broad trough extending southward from a low in Canada down across the middle of the country. This low will wobble east but the trough will be reinforced by another lobe rotating down across CA Tuesday.
Cold front that brought the gusty winds today vacates the area and our clearer skies with dew points in the 20s with a few areas that could drop into the upper teens and cold morning temperatures that drop to freezing at 4z and continue slowing dropping thereafter. Tuesday's temperatures will stay below normal with highs only reaching the low to mid 40s with mixing up to around 700 mb where temps are expected to be around -20C. Split flow remains across the CONUS with ridging existing across the western CONUS and coupling or phasing of jets across the eastern CONUS. Negative EPO blocking exists in the Pacific with negative NAO blocking in the Atlantic trending towards a neutral NAO in couple of days.
133 PM EDT Mon Apr 13 2020 Showers will end with crossing low pressure, with windy conditions likely through this evening. Regional radar mosaic suggests widespread showers quickly trekking east across the forecast area in association with a crossing cold front. Cold, dry advection in the wake of the front should end widespread precipitation chances later today, with steep low- level lapse rates maintaining a stratocu deck through the period under upper troughing. In the wake of the cold front passage, a tightening sfc pressure gradient, 50-60kt low level stream, increased mixing, and 3 hour pressure rises of 10mb are all anticipated.
232 PM EDT Mon Apr 13 2020 Much cooler air on gusty winds will move in this evening and stay in our area through the week.
High pressure will build east in the wake of this boundary and some clearing will take place tonight. Tuesday an upper level trough axis will shift east and some weaker upper level divergence aloft will give way to some showers through the afternoon into Tuesday night. Therefore the colder ridges in the far southeast could see light snow accumulations. This trough axis will usher in much cooler air and could also clear out enough for some frost and of course freezing temperatures Tuesday night.
1224 PM CDT Mon Apr 13 2020 Surface winds will continue to diminish this morning across the Ozarks as a strong mid-latitude cyclone departs toward the Great Lakes region. With modified Canadian high pressure building into the Central Plains, we should see a period of full sunshine into this afternoon.
1101 AM EDT Mon Apr 13 2020 Currently - A low pressure system stretches from the Great Lakes region down into the Appalachians, with a trailing cold front down into the Florida Panhandle. Temperatures are in the lower to mid 80s with dew points in the mid 70s. Thereafter the ridge axis will settle over the Keys, leading to a col region with light and variable winds.
1117 AM EDT Mon Apr 13 2020 A cold front will move through today.
The broad circulation associated with the long wave trough across the Upper Midwest will likely continue the isolated late morning/afternoon cumulus clouds and potential snow/rain showers. Therefore, no signs of any strong surge of warmer air coming back over our region.
Other concern for tonight will once again be the cold, subfreezing temperatures.
Through the day tomorrow, a cold front, which is across north Florida today, will begin to sag south. An upper-level trough and a series of impulses moving SE from northern CONUS and barreling towards the eastern portion of CONUS late this week. Simultaneously, mid-level ridging will extend from the Caribbean and into FL through the end of the week. As the trough approaches FL, along with an attendant frontal boundary, the aforementioned ridge will serve to dampen the strength of the trough along with the first cold front approaching tomorrow.
334 PM EDT Mon Apr 13 2020 Strong westerly winds will occur across the area through early tonight as thunderstorms move east of the area, and much cooler air pushes in.
The deep, cold upper low centered over south- central Canada with high pressure aloft over the eastern Pacific will leave the northern Rockies/Great Basin under a rather cold north-northwest flow aloft early this week.