Aikyam-Lab/Synoptic-Bench huggingface dataset:
437 AM EST Wed Jan 24 2018 Currently - Winds across most of the forecast area are light as an Atlantic ridge has retreated eastward, leaving a weak pressure field across the area. With that said, another large high pressure system is spreading southeastwards into the southeastern United States and Gulf of Mexico. The weaker north to northeast breezes across nearby waters, Soggy dew points near 70 and gulf side waters in the mid 60s has resulted in patchy fog and widespread low ceilings, with the greatest concentrations over portions of the Lower and Middle Keys. Forecast - High pressure will continue to spread southeastwards today and tonight. This is due to a swath of low level moisture, associated with a dying cold front, sagging southward to stall near the Keys as lower level flow gradually veers more easterly.
South central South Dakota is only retaining high clouds this afternoon, associated with a quick-moving, weak upper level trough. Despite brief clearing, many can expect partly to mostly cloudy skies through the evening and overnight hours, since lingering low-level moisture should allow low clouds and areas of fog to re-form, primarily between the James River Valley in the west and the Buffalo Ridge in the east. Temperature-wise, seasonal readings today give way to warmer than average conditions tomorrow (Wednesday), as an upper-level ridge builds over the Plains.
Upper troughing will keep temperatures near normal and some chances for a light wintry mix or flurries in the forecast through Wednesday.
1218 AM EST Wed Jan 24 2018 It should be a rather quiet TAF period with an upper low moving through to our north.
The low pressure system that brought all of the wind and snow will shift to the New England states by Wednesday afternoon. Otherwise, most areas will see dry conditions tonight with low dropping into the low teens to single digits. High temperatures will mainly be in the low to mid 20s. Mid/upper level ridging will advance through the cntrl CONUS to the Great Lakes from Wed into Fri as a trough moves through the wrn CONUS.
123 AM EST Wed Jan 24 2018 An upper level disturbance and accompanying weak, moisture-starved cold front will cross the southern middle Atlantic states early tonight. High pressure will otherwise build east across our region through the end of the week. A secondary cold front, which marks the true density airmass change and easiest discernible by dewpoints falling into the 20s, has just recently pushed through the Triangle, and will continue to progress SE through the remainder of the forecast area over the next 3 to 4 hours. Wednesday and Wednesday night, high pressure at the surface over the southern Plains will build east across the Deep South and into the Carolinas. Warming the low level atmosphere dry adiabatically to 900-875mb layer achieves afternoon temperatures in the low-mid 50s.
The result will be warmer temperatures with highs in the upper 50s to lower 60s.
It's uncertain that the patchy clearing of the low clouds will make it into the CWA and overall have trended more pessimistic with sky trends today. It appears the best chance for the low clouds to scatter to just mid clouds during daylight hours would be in the western and northwest CWA. Rodriguez 126 AM CST Fairly tranquil weather on the lake the next couple days as a ridge of high pressure gradually moves across the region.
Otherwise lee trof redevelops overnight with westerly winds increasing across the central and southeast mountains and lower eastern slopes towards morning. This should keep temperatures slightly warmer for these areas though expect a quick drop in temperatures this evening before winds kick up towards morning. For Wednesday, temperatures will rebound as upper ridging aloft translates across the area. Winds will increase across the high country in the afternoon.
Despite the cirrus shield, should see a light freeze over much of the area as sfc ridging over the Srn Plains begins to expand E into the region.
Full sun and light west and southwest winds are expected and the temperature forecast uses a blend of guidance plus bias correction for highs in the lower to mid 40s. The HRRR and RAP models appeared to be too cool keeping highs mostly in the 30s which is actually a cooler forecast than yesterday.
A warm front continues to lift north across Washington with a cold front moving onto the west coast. The warm front will bring a steady precipitation to the northern portion of the forecast area early tonight and then precipitation will decrease. However, the cold front will begin bushing another bad of precipitation eastward across the forecast area on Wednesday that will exit late that night. Will also see increasing southerly winds overnight and Wednesday ahead of the cold front for portions of the forecast area.
331 AM CST Wed Jan 24 2018 Water vapor imagery this morning was showing an amplified ridge over the Rockies stretching into wrn Canada with hefty moisture riding up and over into the nrn Plains.
Short term forecast soundings do still indicate some residual moisture in the lowest 5kft from Craig eastward, and some upslope cloud cover will linger through the evening in the northern mountains. Overnight, ridging will move in and with clear skies and light winds, another night with below average temperatures is expected. On Wednesday, the ridge axis passes through eastern Utah and western Colorado and a mostly sunny and dry day is expected.
Overall the impacts will be minimal from these snow showers, as temperatures are just beginning to hit the freezing mark for most and antecedent warm ground temperatures will inhibit accumulations. Consequently, the surface temperatures will remain in the 30s for the day given the advection of cooler 850mb temperatures throughout the day and low level cloud cover. Otherwise, high pressure will build east tonight as heights begin to rise. The temperatures could be tricky if we see more clearing tonight and perhaps a larger ridge/valley split could develop.
1014 PM MST Tue Jan 23 2018 06Z TAF CYCLE General northwest flow aloft next 18 hrs with a weak upper low circulation southwest to south of the NM bootheel. Surface lee trough to develop by 24/15Z.
A run to the low teens is not out of the question in the Thumb, but remained conservative given uncertainties and lack of snowcover. Thermal trough directly overhead to start Wednesday will ensure a low ceiling on temps. Subsidence beneath incoming upper ridge will reinforce existing inversion, supporting a more pessimistic cloud forecast overall for Wednesday, especially considering mid/high clouds streaming associated with the trough over the northern Great Plains will be streaming overhead.
321 AM EST Wed Jan 24 2018 Broad trofiness over the Great Lakes has kept a pretty solid cloud shield in the Ohio Valley overnight, with patchy light drizzle and flurries. With temps near freezing and a few snow showers around, there remains the potential for a few slick spots due to light ice glaze or a dusting of snow, but so far impacts have been minimal. Plenty of cloud cover and continued cold advection will limit temp recovery, and we are toward the cooler end of guidance with max temps in the mid/upper 30s.
Weak warm air advection will allow temperatures this afternoon to reach the middle 40s to lower 50s, with slightly cooler readings in the stratus zone. Lows tonight will be several degrees warmer thanks in part to southerly winds and continued moisture transport.
This fast moving upper disturbance is expected to stay north of the CWA as a moisture deficient airmass and associated high pressure at the surface spread across the southwestern U.
Skies are clear across Central Alabama, but a 3-5k ft deck of clouds can been seen on visible satellite just to our north in association with a passing upper trough. Expect clear skies with overnight lows generally in the low 30s, but some upper 20s are possible across the north.
High pressure will expand over the region today as the center slides from the Four Corners, south and east toward the area tonight.
355 AM EST Wed Jan 24 2018 A weak trough will swing across the Eastern Great Lakes today kicking off a few snow showers in the snowbelt. High pressure will move across the Upper Ohio Valley tonight.
Cold front approaches from the north late in the cycle and is expected to push through KVCT shifting winds around to the north. Some "better" relief is on the way though as a cold front moves through the region early Tuesday morning. Behind the front, gusty northerly winds are expected which will help to draw in lower dewpoints by Tuesday afternoon and cooler temperatures. Increase in winds expected behind the cold front later on Tuesday.
Fall weather is on the way as a cold front roughly positioned from a Wichita Falls to San Angelo line will be pushing across southeastern Texas tomorrow morning. Scattered overnight showers/isolated thunder ahead of or along the front with the highest chance for patchy fog leading to more persistent showers and isolated thunder focusing across the southern third of the CWA tomorrow morning at this time. The relatively (but not overly) drier post-frontal air mass is forecast to lower dew points from today's middle 70s to the lower 50s (north) to middle 60s (coast) by the close of business tomorrow.
520 AM MDT Mon Oct 9 2017 Upper level analysis has a positively tilted upper trof over the central Rockies and northern Plains, with ridging building into the Pacific Northwest. At the surface, high pressure has settled across the northern Rockies and into the northern Plains. Upper level trof will continue to shift east of the area this morning, with light rain and rain mixed with snow coming to an end across south central SD. With Tripp county not seeing freezing temperatures yet this Fall, a freeze warning has been issued for tonight into Tuesday morning. Upper ridging will take place for mid week, with southwest flow aloft taking over for the latter part of the week.
High pressure returns Tuesday with mostly sunny skies and mild temperatures. Temperatures will rise into the lower and middle-70s today. Tonight and Tuesday, high pressure from the northern Great Lakes will nose down into the region. Partly sunny skies are expected on Tuesday with continued mild conditions as temperatures max out in the lower to middle 70s. Tuesday night remains dry as high pressure in the northeast moves slowly east ahead of a storm in the Plains.
A cold front dropping through the area will cause winds to become northerly by mid/late afternoon across southern Wisconsin. medium to high: A slow moving cold front will drop through southern Wisconsin today. Temps in the northwest will be cooler, but still a couple/few degrees above average values. Forcing along the front will be fairly limited, though models are showing a decent amount of lift in the lower levels. Even with the cloud cover, looks like a good enough push in cooler temps behind the departing front for lows cooler than the last couple nights.
Additionally, building upper ridging will mean a continuation of warmer than normal highs. High pressure will settle in north of the waters over the coming week, with a prevailing easterly wind flow.
622 AM CDT Mon Oct 9 2017 The cold front is on the doorstep at the time of writing and should be through all terminals by 14Z. /issued 313 AM CDT Mon Oct 9 2017/ As of 3 am the strong cold front was just entering the Panhandle. A trough will move through overnight, however, winds will stay around 15-20 mph overnight which should limit cooling some. A few areas in the extreme southwestern Panhandle may get close to freezing. Temperatures will slowly warm as the high over the southeast build west over Texas.
718 AM EDT Mon Oct 9 2017 Aviation High pressure will bring fair weather and temperatures in the 70s today.
A dry cold front will cross the area later Tuesday.
High clouds over Alberta will drop SE into the CWA this afternoon while a Lee-side trough is in place over central Montana. Sometimes temps can be warmer that what guidance suggests. An upper ridge will advance toward the region today from the west and extend into eastern Montana. Associated height rises will lead to warmer temperatures late in the day all while large scale subsidence translates to dry weather conditions. This ridging will remain in place tonight and Tuesday with warming trends continuing.
After morning lows around freezing in the Treasure Valley, the Frost Advisory was allowed to expire at 9 am MDT. We will have an upper level ridge move over today, bringing dry conditions and mostly clear skies. A Frost Advisory is in effect for the Treasure Valley where temperatures will bottom out to around freezing. A dry northerly flow will shift east this morning as an upper ridge moves in this afternoon. The ridge will shift east tonight followed by southwest flow aloft on Tuesday. The flow will bring warmer temperatures with highs near normal.
545 AM MDT Mon Oct 9 2017 Upper trough is still amplifying into northeast Utah with upper level divergence and large scale ascent producing widespread precip over the CWA. With the snow cover on the ground over portions of the area and 700 mb temps around -8C, highs will struggle to get out of the low 40s, a good 25 degrees below normal.
A ridge of high pressure will be over the region today and overnight before moving off to the east on Tuesday allowing an upper level trough to settle over the region midweek. Will see some increasing high clouds today and overnight in advance of the approaching trough. The ridge will provide a little warmer temepratures today and overnight. Winds will be light today and then some increasing southerly winds overnight ahead of the approaching trough.
Showers are primarily associated with a trof of low pressure in the mid and upper levels positioned over the western gulf. Looking for temperatures to respond quickly with temperatures into the lower 90s most locations this afternoon.
These conditions should persist through the evening hours before a strong cold front moves through all of the TAF sites between 6-9Z to bring a brief period of MVFR ceilings to the I-35 sites and gusty northerly winds to 25 knots by 12Z. Current expectations are the cold front entering the Hill Country this evening, surging across the I-35/Highway 90 Escarpment areas overnight (Austin and San Antonio metro areas between 2 and 4 AM), then exiting to the Coastal Plains early Tuesday morning. The upper level trough will pass to the north of our area as an upper level ridge begins to build to the west along the Gulf Coast states leaving the cold front and isentropic lift as the only forcing mechanisms for convective development.
Chattanooga Airport, TN 85 73 83 70 / 20 60 70 40 Knoxville McGhee Tyson Airport, TN 83 69 81 69 / 20 50 70 50 Oak Ridge, TN 83 69 80 68 / 20 50 70 50 Tri Cities Airport, TN 81 66 79 65 / 20 40 70 50.
High pressure and weak offshore flow will provide dry and mild weather over southwest Washington and northwest Oregon today.
Northern ND experienced a brief period of near freezing temperatures early last evening, but temperatures have risen into the mid 30s. To the south of these clouds temperatures dropped well below freezing, especially across the southwest, and currently remain below freezing. Will continue the freeze warning with some areas still well below freezing. But in the north, temperatures will likely not drop below freezing, expect maybe in the far west of clearing makes it from NE MT into NW ND.
Temperatures will run near normal through Tuesday, then trend several degrees cooler through the end of the week. Temperatures will generally run near normal through Tuesday in the west to northwest flow between this exiting trough and another developing trough moving into the Pac NW.
1106 AM EDT Mon Oct 9 2017 The remnant low pressure center of Hurricane Nate will pull away to the northeast today. A low pressure system will bring another chance of rain to the region for the middle part of the week. High pressure to build across the region tonight. The 00Z models are slower in bringing pcpn back into the region along a warm front, therefore dropped PoPs on Tuesday to slight chance in the south and keep the ne dry.
1007 AM EDT Mon Oct 9 2017 The remnant low pressure center of Hurricane Nate will pull away to the northeast today. A low pressure system will bring another chance of rain to the region for the middle part of the week. High pressure to build across the region tonight. The 00Z models are slower in bringing pcpn back into the region along a warm front, therefore dropped PoPs on Tuesday to slight chance in the south and keep the ne dry.
1029 AM MDT Mon Oct 9 2017 Morning water vapor loop showed the upper low just east of the Four Corners, with a trowal signature over west-central CO. Upper trough is still amplifying into northeast Utah with upper level divergence and large scale ascent producing widespread precip over the CWA. With the snow cover on the ground over portions of the area and 700 mb temps around -8C, highs will struggle to get out of the low 40s, a good 25 degrees below normal.
During the overnight periods, interior temperatures will cool into the lower to mid 30s for much of the region, warming to the 40s along the immediate coast. This remains our primary short term concern (fire potential development/growth), as many interior locations are currently seeing relative humidity values of 10-15% with area ridgetop sustained winds of 25 to 35 mph, with gusts as high as 45 mph having been observed. The first trough looks to pass by to our north for the middle of the week, with perhaps a few showers developing across Del Norte County.
639 AM CDT Mon Oct 9 2017 Needed to up the sky grids across the area not only for the high cirrus in the south but the stratocu that continues to push to the east southeast over the DVL basin and northern valley. There remains an area between to the clouds where temps are in the low and mid 30s so will leave current frost freeze headlines as is. Keeping with that thinking expecting the lowest temps to be in the mid 20s in SE ND and NW MN with the rest of the area in the upper 20s to near 30.
The warm front pushes north before stalling somewhere between Huntsville and Nashville tonight into Tuesday. However, with a more defined warm front directly over or just north of the area, a more consistent moderate to at times heavy rainfall period is expected. By Tuesday night, models are in fairly good agreement that the main upper level energy with an approaching cold front/associated upper level energy moves quickly northeast away from the area.
Analysis of recent data reveal a weak trough extending south from the remnant low of Nate currently centered just SE of Lake Erie. This trough extends very roughly across the CWA from about Gainesville through the S ATL metro before becoming more diffuse into AL. subtle vort maxes rounding the periphery of an upper ridge into western Ga only aid in larger scale lift for the rain activity. Temperatures should remain above normal trough Tuesday.
The region will see areas of morning fog before high pressure aloft brings breezy, dry, and warmer conditions this afternoon and Tuesday.
Temps are quickly heating up with readings already in the mid 80s across much of the Delta with dewpoints in the low to mid 70s. Tupelo and Memphis remain in the low 70s with widespread upper 60s across the region. Southerly flow will strengthen tonight and tomorrow as a highly amplified trough and associated surface cold front approach from the West. This trough looks a bit more amplified than yesterday and attains a neutral to slightly negative tilt as it approaches the Mississippi River tomorrow afternoon.
Primary aviation concern for the prevailing period will be thunderstorms developing along a cold front and moving through eastern OK terminals. The cold front will progress east this morning with storms expected to fire by afternoon. Low level moisture is on the increase across portions of southern Oklahoma early this morning, per mesonet dew point trends, as southerly winds strengthen ahead of an approaching cold front and upper level storm system. The front should clear the area tomorrow morning, with much cooler temperatures behind it for the middle of the week.
Needed to up the sky grids across the area not only for the high cirrus in the south but the stratocu that continues to push to the east southeast over the DVL basin and northern valley. There remains an area between to the clouds where temps are in the low and mid 30s so will leave current frost freeze headlines as is. Keeping with that thinking expecting the lowest temps to be in the mid 20s in SE ND and NW MN with the rest of the area in the upper 20s to near 30.
958 AM EDT Mon Oct 9 2017 Low pressure will move to the east this afternoon.
A deep easterly flow prevailed along the southwest flank of a deep layer mean anticyclone centered over the western North Atlantic Ocean.
445 AM PDT Mon Oct 9 2017 Drier weather will linger over the area into Tuesday as a ridge of high pressure remains in place.
700 AM CDT Mon Oct 9 2017 Extensive mid level cloud cover has been persisting across the local area overnight ahead of a cold front across western Nebraska. when the main upper level low helps to push this cold front across the local area. expect the attention to turn from a blustery evening to the potential for near freezing temperatures and frost formation early Tuesday morning. opted not to issue a freeze warning and kept the watch going so the day shift can gain some more confidence on if freezing temperatures or frost will eventually be realized across the western fringes of the local forecast area.
Weak high pressure is building into Middle Tennessee from the southeast as what's left of Nate races toward the northeast and tomorrow evening's cold front remains situated north of the Ohio Valley.
High pressure brings a dry Tuesday, and then another system brings rain chances midweek. Expect moisture to quickly peel off to the east, with little more than widely scattered showers and/or drizzle the rest of the afternoon as high pressure builds eastward. Dry weather continues Tuesday as the high center tracks across northern Pennsylvania, with high temperatures fairly similar to today.
Strong cold front entering northwest Oklahoma early this morning will surge quickly south and pick up easterly speed this afternoon. /issued 358 AM CDT Mon Oct 9 2017/ Strong cold front will enter northwest Oklahoma shortly after sunrise and make much quicker southward progress than eastward. As mid-upper level jet rounds trough and progresses quickly eastward late today, surface cyclone and front will increase eastward pace and surge through central and eastern portions of Oklahoma this evening. Well behind the front, across northwest and north-central parts of Oklahoma, light showers will be scattered this evening and overnight as upper low moves overhead.
High pressure aloft will prevail over the region today for near normal temperatures. A low pressure system will move across the area on Tuesday, bringing showers and possible thunderstorms. Look for a series of low pressure systems to bring cool and unsettled conditions to the region the latter half of this week. Primarily high clouds were streaming across the area ahead of a weak upper level trof that was currently moving southeast out of the Gulf of AK. Another weak frontal system will dig southeast toward the forecast area today and tonight; the remains of the cold front will move into Western Washington Tuesday, followed by a deep 5430 meter upper low Tuesday night. The air mass will become unstable with the approach of the upper low, and there's a chance of thunderstorms mainly Tuesday evening.