Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 842 PM EDT Sun Apr 30 2017/ High pressure at the surface and aloft will continue to push east overnight as a cold front approaches from the NW. The cold front will slowly move through the area tomorrow into Tuesday with scattered showers and a few thunderstorms possible. High pressure will shift east overnight as a cold front approaches the area.
307 AM CDT Mon May 1 2017 Strong mid level low pressure is currently over northwest MO and will continue to lift northeastward today. Mid level moisture has managed to warp completely around the low pressure. The low level temperature profile in this region is supporting a mixture of rain and snow.
617 AM EDT Mon May 1 2017 An approaching cold front today will move through the forecast area this evening.
122 AM EDT Mon May 1 2017 VFR conditions currently across the terminals as a cold front approaches from the west.
A weak upper level trough will cross Western Washington for a little light rain this morning and this afternoon before scattering out in advance of an upper level ridge.
314 AM CDT Mon May 1 2017 An unseasonably strong low pressure system, centered over northwestern Missouri early this morning, will lift northeastward to the Upper Mississippi Valley and western Great Lakes Region by early this evening. Regional mosaic radars early this morning show bands of light to moderate precipitation circulating southward on the backside of the upper low into portions of north-central/northeast Kansas.
343 AM EDT Mon May 1 2017 A warm front will lift north into the region today and will stall over the area. A cold front will approach from the west overnight and will push east through the region on Tuesday.
247 AM CDT Mon May 1 2017 The departing upper level low currently over northwestern Missouri will give way to rising heights and thicknesses today. An upper level trough and associated jet will strengthen on Tuesday as it crosses over the Rockies.
206 AM EDT Mon May 1 2017 A strong cold front crosses today.
428 AM EDT Mon May 1 2017 A cold front will move east of the area today. Cooler and drier air will filter in behind the front on Tuesday.
402 AM CDT Mon May 1 2017 Our May 1st snowstorm continues this morning, with an impressive presentation on water vapor this morning showing moisture from the trowal rotation entirely around the upper low. Trowal axis will continue to pivot to a north to south orientation through the daybreak hours, and it may not be until late morning for precipitation to gradually wind down as the upper low pivots into eastern Iowa and dry air undercuts the system. This could leave temperatures west of the James River valley significantly warmer than areas east.
1141 PM MDT Sun Apr 30 2017 Region will remain in cool northwesterly flow the next couple of days as troughiness encompasses the eastern 2/3rds of the US and weak ridging builds over the eastern Pacific Ocean. Many locations as of 3pm are showing temps about 10 degrees warmer than yesterday, with forecast guidance for low temps tonight indicating temps 10 degrees warmer in many spots than last night thanks to the expected cloud cover. Since we are in early May, expect rain and a rain/snow mix if traveling in the mountain terrain, with a lightning threat as well on the high peaks.
Monday into Tuesday will turn windy and cooler behind this system with a few light showers possible each day. Deep/tropical moisture transport within LLJ core on the eastern flank of a maturing Central US cyclone will provide additional rain chances near a frontal zone later this afternoon into tonight. Subtle vorticity filaments rotating through the Lower Great Lakes on southern fringe, combined with just enough moisture and steepening moisture, may be enough to generate a few additional light showers across mainly northern portions of the forecast area.
239 AM CDT Mon May 1 2017 A cold front is very slowly moving through Central AL.
304 AM MST Mon May 1 2017 Dry conditions, mostly clear skies, and generally light winds will prevail throughout the week as high pressure builds over the Southwest.
Then Tuesday night a ridge of high pressure begins to build over the Northern Rockies causing the showers to dissipate.
Otherwise, dry and much warmer weather lies ahead for Nevada this week as a Pacific ridge of high pressure builds into the Great Basin.
409 AM EST Wed Jan 17 2018 High pressure centered over the Plains this morning will build into the Tennessee Valley. Southwest flow around this high will result in a gradual warming trend.
/issued 336 PM EST Tue Jan 16 2018/ High pressure along the mid-Atlantic coast has been responsible for breezy northeast winds. On Wednesday, a deep trough of low pressure will begin to push eastward over the Appalachians. This will drive a cold front through South Florida on Wednesday. Maximum temperatures Wednesday afternoon are forecast to be in the low to mid 70s, except near 70 in the northwest portion of the area, as the front will reach that location sooner. The latest NWS forecast is about 2 degrees colder for the low temperature on Thursday morning compared with our previous forecast.
High pressure will remain over the Great Basin through midweek, before giving way to a warm southwest flow on Thursday.
404 AM EST Wed Jan 17 2018 Well below normal temperatures and dry conditions can be expected today with warmer temperatures later this week and into the weekend as high pressure remains in control.
/Issued 939 PM CST Tue Jan 16 2018/ Arctic high pressure centered over eastern Oklahoma this evening setting the stage for near optimal radiational cooling conditions tonight. Arctic high pressure resides over the Plains today, the center of which was over Kansas this afternoon. The high center will drift southeast over our area tonight. The persistent La Nina ridge in the west, trough in the east pattern this winter will be flipped.
Winds begin to dwindle through the day as high pressure begins to build into the area. With the high over the area Wed night/Thurs morning, light winds and clear skies would support a good radiational cooling night.
High pressure will prevail across the region most of the week with above normal temperatures and dry conditions.
Some upper level energy continues to rotate through the Ohio Valley trough generating some clouds along with some snow flurries. Highs well below freezing today in the arctic air mass ranging from the mid teens to the mid 20s over the light snow cover.
401 AM EST Wed Jan 17 2018 Low pressure near Hudson Bay will slide southeast into Quebec by tonight. Meanwhile high pressure over the Ohio Valley will sink south towards the Gulf Coast. A prolonged period of southwest flow along with an upper level ridge building across the eastern United States will lead to a gradual warming trend into this weekend. Winds are generally light (3-8 mph) with high pressure over the Ohio Valley and may drop off a little more as we head towards dawn. After a cool start to the day, went with a blend of MAV/MET guidance for highs today, generally in the lower 20s west to upper teens east. Fortunately southwest winds will increase this evening and lows will only drop back into the lower teens.
High pressure will continue to build overhead on Wednesday night and another cold night is expected. Good news is that ridging continues to build overhead with warm air advection and temperatures should climb above freezing by Thursday afternoon for a large portion of the region.
That high pressure area will shift to the southeast and allow for winds to shift to the southwest. Depending on how quickly the couple inches of snow across the area melts, Thursday's temperatures could range from the upper 30s to the lower 40s.
Winds will continue to bring warm air advection overnight with rising temps and readings approaching the freezing mark tomorrow afternoon. Wednesday will be sunny and significantly warmer, with high temperatures in the upper 20s across northwest Minnesota and lower 30s into North Dakota. Also, with the warmer temperatures expected, there will be the chance of precipitation being freezing rain or sleet. Upper level ridging continues over the area late this week continuing warmer than normal temperatures. An upper level wave moves through this ridge in Canada dragging a cold front over the Northern Plains.
The area's Hard Freeze Warning and Wind Chill Advisory will remain in effect until 10 AM, and will extend the Winter Weather Advisory until 10 AM due to the numerous reports of ice still on lots of area roadways (mainly bridges/overpasses) and associated road closures.
Temperatures have been falling slowly this evening with south winds staying up along with bringing in slightly warmer air. May see a bit of a downslope wind event over the Coteau tonight into tomorrow morning as well, but with very little snow on the ground, expect the main effect to just be the potential for some patchy blowing snow along the higher elevation areas. Will see temperatures fall into the single digits above and below zero tonight, then the warmer air begins to take over, with highs in the upper 20s east to the lower 40s west on Wednesday afternoon. This will be followed by weak ridging aloft.
Gusty easterly winds and cooler temperatures will continue on Wednesday.
Some of the more urban areas, such as the bigger cities along the I-20 corridor, may experience slightly warmer temperatures compared to outlying locations.
202 AM CST Wed Jan 17 2018 An upper trough continues to rotate east of the forecast area per the 08Z water vapor imagery. This has allowed an upper ridge to move into the plains while a closed upper low remained well off the west coast. This is because the high has pushed all the way into northern Mexico and should keep the gulf closed off. Forecast soundings show little if any mixing today and as a result tend to keep highs in the lower and mid 20s. However think sunny skies and a southwesterly wind will help bump highs a little warmer than this into the upper 20s and lower 30s.
1040 PM CST Tue Jan 16 2018 WV imagery this afternoon showing a well amplified upstream ridge over the Rockies gradually approaching the central CONUS. large area of high pressure was in control over the Plains.
238 AM CST Wed Jan 17 2018 Data analysis early this morning has a ridge of high pressure moving slowly east across the region while low pressure tracks across southern Canada. A few altocumulus/patches of cirrus associated with the low were passing across areas north of I-94, otherwise it was mostly clear and very cold across the area.
247 AM MST Wed Jan 17 2018 Current surface map shows warm front moving into eastern Montana/eastern Wyoming. Warm front continues to move east today, allowing temperatures to climb into the upper 30s to mid 40s for much of the forecast area.
A northwest upper flow with an upper ridge moving across Wisconsin this evening. Low pressure to our north and high pressure to the south, puts us squarely in a tight pressure gradient. Temperatures will be in the lower to 20s, but with the winds, wind chills will keep values in the single digits this afternoon.
Weak and flattening ridge aloft moves overhead providing mostly clear skies. Warmer day with 700 mb temperatures near -1 Celsius yielding maximum temperatures in the 40s at lower elevations. Flow aloft turns westerly, inducing an even more significant surface lee trough, which will produce an even warmer day with 700 mb temperatures near 4 Celsius, yielding maximum temperatures in the upper 40s to near 60 degrees at lower elevations. Even warmer than Wednesday night as the airmass moderates further and downslope west winds aid in the mild temperature trend.
Winds to begin to back around to the southwest late tonight into Wednesday which will set up return flow and begin to usher in warmer air. Temps will drop fairly quickly this evening with the mostly clear skies, but should then level off or even warm some into early Wednesday as the winds back around and warmer air moves into the state. Highs Wednesday will return to somewhat more seasonal values into the low to mid 20s across the forecast area.
1101 PM CST Tue Jan 16 2018 Cold front has now pushed off shore over southeast TX with a very cold airmass situated over the Plains. In the upper levels, a positive tilted trough extends from the eastern Great Lakes into the Ozark region. Upper trough is expected to continue tracking east and will move across the Eastern Seaboard on Wed. Lows tonight will likely be colder than temps early this morning, but winds will be much lighter resulting in warmer wind chills. Weak upper ridging is forecast to track over the Rockies and into the northern Plains by Thu. They both track it across the desert southwest Sat, into the high Plains Sat night and across central KS on Sun.
426 AM EST Wed Jan 17 2018 High pressure passes south of the area later today through Thursday.
1020 PM MST Tue Jan 16 2018 20z surface analysis had low pressure over central AB with warm front into western NE. 12z KUNR sounding showed warm air ready to invade and it is clearly doing so, most pronounced over the higher elevations. Warm front will rush through the CWA with sustained warm air advection leading to widespread readings crossing the 40F threshold Wednesday afternoon.
245 AM MST Wed Jan 17 2018 Upper ridge will continue to dominate the short term period, resulting in dry conditions and warming temperatures.
429 AM EST Wed Jan 17 2018 Latest water vapor loop shows a deep trough centered over the Tennessee Valley with mid and upper level moisture streaming northeastward, out ahead of the feature. WPC surface analysis depicts a well defined cold front draped southward from the apparent low, moving swiftly across the eastern Gulf of Mexico. Maximum temperatures will be a few degrees cooler than yesterday, mainly in the low 70s. This flow pattern will advect much cooler and drier air in to our region. Areas west of Lake Okeechobee will be subject to the lowest minimum temperatures, down into the low to mid 30s. Along the east coast metro, minimum temperatures should be more moderate with forecast mins in the upper 40s and wind chill values in the low to mid 40s.
400 AM CST Wed Jan 17 2018 Warmer today with warmer air moving in aloft. Water vapor loop indicated a short wave trough over southern ALTA. Trough will move across southern MAN and will produce light snow/freezing rain mainly over northern MN for tonight.
High pressure will build into the Tennessee Valley Wednesday into Thursday, leading to dry conditions and a gradual warming trend. Main concern overnight remains the fate of the low clouds across the region. So have followed its solution in pushing the low level moisture south through the night. This will allow for the low level flow across our area to slowly back to the northwest and then the west.
This ridge will turn winds more southwesterly over the region tonight, with winds strengthening overnight as the surface pressure gradient tightens. These southwesterly winds will also keep temperatures warmer than the last few nights. Even warmer temperatures are expected by the end of this week. Forecast soundings indicate the precipitation could be in the form of freezing drizzle, or a mix of freezing drizzle and snow. Upper level ridging should then bring dry weather for the remainder of Thursday and Thursday night.
255 AM CST Wed Jan 17 2018 High pressure ridge over the area providing clear skies and light winds. Warming trend commences as high pressure ridge shifts southeast and winds become southwest. Highs will be in the lower 20s with lows in the teens.
Surface cold front will move Southeast across the region this morning. Best moisture will follow this boundary as an upper trough pushes Southeast. With high pressure centered west of the area, cold air advection will keep high temperatures well below normal in the upper 40s to lower 50s, despite full sunshine.
Chattanooga Airport, TN 11 25 14 39 / 70 10 0 0 Knoxville McGhee Tyson Airport, TN 10 22 10 36 / 80 10 0 0 Oak Ridge, TN 9 25 9 36 / 70 10 0 0 Tri Cities Airport, TN 13 21 9 34 / 80 10 0 0 NC.
1123 PM CST Tue Jan 16 2018 Temperatures have fallen into the low teens or single digits at this hour, and will continue to fall into the low to mid single digits overnight. Low pressure to our north and high pressure to the south, puts us squarely in a tight pressure gradient. Temperatures will be in the 20s on Wednesday, warming into the lower and mid 30s on Thursday with the milder southwest flow.
218 AM CST Wed Jan 17 2018 The 08Z surface chart shows 1043 mb of high pressure centering across eastern OK/extending into southwest MO. The models grab this high and build it southeastward across the lower Mississippi river valley over the course of the short term forecast period. Currently, satellite shows a slug of moisture in association with the upper trof axis slinging across the FA. With the high will come increasing sunshine, and this should assist ice and snow melt, even though air temps will remain below freezing for another day. Clear skies tonight mean one more night of single digit cold is possible, but then we start to warm up as the high shifts ever eastward and upper heights begin to build as well.
1143 PM CST Tue Jan 16 2018 The area of sleet, snow and freezing rain is pushing off to the east rather quickly late this evening and will only impact KHUM, KMSY, KNEW, KASD and KGPT for the next hour or two.
253 AM MST Wed Jan 17 2018 Moderating temperatures today under increasing ridging and warm air aloft. Strong surface inversions overnight have caused teens along the base of the foothills with single digits over the eastern plains while the higher foothills stay more mild in the low 30s. Upper flow will turn NW by the afternoon with a branch of slightly increased moisture moving over the region creating some additional potential cloud cover over portions of the plains, but not enough to impact the highs of upper 40s expected today. Overnight lows will be more mild than in previous nights as warm air advection increases with lows in the low to mid 20s. Areas that traditionally are cooler near water sources and lower elevations may see enough radiational cooling for lows dipping into the teens and single digits at higher elevations.
Dry air will work in the backside of the departing low pressure trough which will result in the erosion of stratocumulus. The higher intensity snow showers will work south this afternoon/evening with the southward advancing trough/convergence axis. The convergence is expected to weaken during the evening as the trough pushes into metro Detroit. Mid level subsidence will take hold overnight as the elongated mid level trough axis departs to the eastern Great Lakes. Subtle surface ridging nudging in behind the departing trough may allow some breaks in the clouds, supporting min temps down into the upper single digits above zero. The low level flow will back to the west-southwest overnight into Wed morning. So a dry forecast will be maintain with the low level warming nudging daytime highs into the low 30s.
331 AM CST Wed Jan 17 2018 Highlights in the short term period include gusty westerly winds and warmer conditions. This, in conjunction with melting and refreezing, may possibly result in icy roads and hazardous travel late Wednesday afternoon through Thursday morning.
1050 PM CST Tue Jan 16 2018 Early afternoon surface analysis indicated broad high pressure stretching from the upper midwest through the southern plains. This trend should continue through the rest of the afternoon with the approach of the ridge axis. It will also be noticeably warmer than today with 925 hPa temperatures rising about 10 degrees Celsius. Expect afternoon highs in the lower to mid 20s. Additional warming at 925 hPa will allow afternoon highs to reach or exceed the freezing mark for many locations.
The lower mid level deck should return to the VCT area Wednesday evening. The area of light freezing drizzle has been confined to Deep South Texas and expected to stay there this evening.
240 AM MST Wed Jan 17 2018 A weak disturbance will ride through the persistent Great Basin ridge and bring widely isolated snow showers to the highest elevations of the northern mountains today. The Great Basin ridge will move east and over western CO Thursday afternoon. Following passage of the ridgeline, southwest winds will gradually increase aloft by sunset Thursday.
1050 PM MST Tue Jan 16 2018 Dry and warm weather continues as high pressure remains overhead. Some high clouds are streaming over western and central Utah at this our thanks to a very weak upper level trough. This trough will move into our area after midnight and bring some high clouds for the morning drive to work. A transitory ridge will move through on Thursday ahead of the next system bringing another day of sun and some high clouds and warm temperatures continuing. Out west, an elongated trough will be ejected from a closed low over the Gulf of Alaska and be coming ashore over the Pacific Northwest. This is the trough everyone will be keeping an eye on.
A weak trof extended west into our area. At the same time, an upper level low aided in rising motion. A weak H5 ridge will lead to quiet weather across the area for the short term as temperatures warm back into the 20s for tomorrow. Other guidance is lockstep just below freezing. Thursday Southwest return flow north of a high pressure system over the Southern U. will advect "warmer" temperatures into E Iowa/NW Illinois. This seems reasonable since we'll have a cold start in the low to mid teens, and since the southwest flow will be advecting over widespread snow cover, albeit relatively shallow, across Missouri up into E Iowa/NW Illinois.
703 AM EDT Mon Jun 5 2017 Low pressure over the eastern Great Lakes will move southeast today. pushing a slow moving cold front across the local area by tonight.
710 AM EDT Mon Jun 5 2017 Low pressure across eastern Lake Erie will take a cold front south across the area today. A trough will linger across the eastern Great Lakes though as an upper low remains nearly stationary through mid week.
/Issued 428 AM CDT Mon Jun 5 2017/ The small convective cluster in Navarro County developed underneath the core of our upper trough. This cP air will not be extraordinarily cool, but the lower humidity will make for some pleasant mornings.
1036 AM EDT Mon Jun 5 2017 A low pressure system slowly drags a cold front through Monday night.
Upper level ridging over the high plains today will discourage thunderstorm activity.
The MVFR deck is mostly hidden from satellite view by higher clouds rotating around the west side of the upper low. In the meantime, a sharp trough was still dipping to the southeast today. At the same time, highly amplified upper level ridging will build on the High Plains. Storms will likely initiate on the higher terrain of New Mexico and eastern Colorado this afternoon under broad east-southeasterly low level flow.
1107 AM EDT Mon Jun 5 2017 The air mass across the region today and tonight will be moist and unstable ahead of a slow moving cold front.
1039 AM EDT Mon Jun 5 2017 A low pressure system slowly drags a cold front through Monday night.
917 AM EDT Mon Jun 5 2017 A cold front over the area will move off to the southeast today. A trough will linger across the eastern Great Lakes through mid week.
1230 PM EDT Mon Jun 5 2017 Periodic shower and thunderstorm chances are expected for the first half of the week as upper low pressure settles over the region. As of 12pm, very faint radar echoes northwest of Pittsburgh suggest the location of the cold front. The NCAR ensemble, 4 km NMM/ARW, and HRRR all show good agreement in a lull in precipitation later in the morning followed by convection developing along the cold front early this afternoon and tracking to the southeast. The short term period will feature the further digging of a very cold upper low over the Eastern CONUS with the latest solutions indicating the cutoff center over the NY/PA border by Tuesday.
446 AM PDT Mon Jun 5 2017 Dry and warmer weather will linger through the first half of the work week, followed by more unsettled and much cooler weather by the end of the week.