Aikyam-Lab/Synoptic-Bench huggingface dataset:
200 PM EST Wed Jan 17 2018 Cold dry high pressure over the southern MS valley will drift east along the gulf coast states through Thursday night.
GUSTY WINDS AND BLOWING SNOW TODAY IS THE PRIMARY HAZARD IN THE Winds will gust to 35-45mph across the Keweenaw today, strongest over the higher terrain and the NW side.
148 PM EST Wed Jan 17 2018 High pressure will build into the region through Thursday, bringing fair skies but cold temperatures.
338 PM CST Wed Jan 17 2018 Tonights forecast challenge will be the chance for freezing rain/drizzle changing over to light snow between midnight and 6am along and north of highway 2. Roads may be slippery in spots tomorrow morning as a result of the freezing precipitation.
/Issued 959 AM CST Wed Jan 17 2018/ This should be the last day of subzero overnight lows, with highs climbing to the lower 30s across much of the area. There is still some snow cover across far northeast Oklahoma and far northwest Arkansas, as seen in visible satellite imagery this morning, and these areas will likely stay a few degrees below freezing.
VFR conditions expected through the TAF period as fairly light winds are in place with high pressure over the area. High pressure will shift east tomorrow and will bring a switch to southwesterly winds. Today Through Thursday Night Arctic high pressure will build over Arkansas from the northwest today. The high will be over the region this afternoon and tonight, and will drift toward the central Gulf Coast on Thursday. Under the high, very cold/dry air will be in place. By rebound, it is meant that most of the region will finally climb above freezing.
152 PM MST Wed Jan 17 2018 Upper ridge will continue to dominate the short term period, resulting in dry conditions and warming temperatures.
Then again, the lower levels of the atmosphere are so dry, think not much will make it to the ground over the Van Horn area, Marfa Plateau, Davis Mountains, Presidio Valley and Big Bend region. Will go ahead and insert some flurries/light rain this evening in these areas, then flurries/light freezing rain late tonight a bit further east.
239 PM EST Wed Jan 17 2018 Weakening high pressure will move from Arkansas to Alabama during the short term. Took temperatures cooler still in sheltered valley locations. With a lot of sunshine tomorrow and a southwest breeze the mercury should rise to around the freezing mark. Return flow behind the high and zonal heights aloft will result in warmer temperatures for us.
153 PM CST Wed Jan 17 2018 With high pressure drifting into the lower Mississippi Valley, winds have started to turn southwest across central Illinois. The warming trend should begin in earnest on Thursday, as temperatures reach above freezing over the CWA. Upper ridging will build eastward through the end of the week, with the warming trend continuing.
223 PM EST Wed Jan 17 2018 High pressure passes south of the area through Thursday.
Weak northwesterly flow aloft will prevail over the central High Plains today, in between an upper low over the eastern CONUS and an upper ridge extending from the northern Rockies into southern California. The exception will be around Elkhart where weak westerly winds at night tend to hold temperatures up several degrees warmer than surrounding locations.
319 PM CST Wed Jan 17 2018 Clear skies, and thankfully, warmer temperatures have characterized this afternoon as winds turned to the SSW and thicknesses slowly increased. A weak trough over NM was evident on WV imagery this afternoon, and this feature will pass to our south with little fanfare on Thursday.
943 PM EDT Fri Apr 28 2017 Unsettled but warm weather is expected for the weekend with a crossing warm front. Most models push the warm front north toward the New York and Pennsylvania border where it stalls late day Saturday.
An upper level ridge will bring a dry period tonight through Saturday morning as it crosses Western Washington. A weak cold front will bring a little light rain to the coast and north part Saturday morning before spreading light rain across the rest of the area Saturday afternoon and evening.
Gives a couple of deg cooler overnight lows but continues to keep w central min in the 30s.
Also, temperatures have been trending slightly cooler, so used near-term guidance and knocked lows down a bit. Temperatures will continue to warm a bit and a slight downslope component in the low-level wind will help this along.
A warm front is lifting north across the region. Will continue to monitor closely as warm front lifts north, and we warm sector.
922 PM CDT Fri Apr 28 2017 Latest observations show winds continue subsiding in the Guadalupes, and the High Wind Warning has been allowed to expire. Meanwhile, sfc analysis shows the cold front already into Lea County, but not generating much in the way of convection, and hi- res models are too quick to develop it. We'll do a quick update to pare back POPs a bit, remove the High Wind Warning, and adjust other parameters as necessary. A cold front will begin to move into the area late this evening, resulting in a NW wind shift at CNM/HOB. /issued 144 PM CDT Fri Apr 28 2017/ Closed upper low will move down across the 4 Corners region later today and swing across NM Saturday.
631 PM CDT Fri Apr 28 2017 High pressure extending from central Manitoba south into North Dakota will keep skies mainly clear and the weather quiet tonight. Mostly sunny and a bit warmer on Saturday with highs from the mid 50s to lower 60s. and seeing a bit warmer conditions today with the same airmass in place tomorrow.
High pressure extending from central Manitoba south into North Dakota will keep skies mainly clear and the weather quiet tonight. Mostly sunny and a bit warmer on Saturday with highs from the mid 50s to lower 60s. and seeing a bit warmer conditions today with the same airmass in place tomorrow.
The low level jet will strengthen to 40-50kt by sunrise and anticipate some wind gusts to start showing up in the obs as this occurs.
855 PM EDT Fri Apr 28 2017 A warm moist southerly flow will continue through the weekend, as a strong high pressure ridge reigns off the Southeast coast. And the orientation of the mid level anticyclone will shunt any isolated mountain convection well to our NW.
610 PM CDT Fri Apr 28 2017 A warm front remains across the state early this Fri evening.
Chattanooga Airport, TN 66 90 67 86 / 0 20 10 20 Knoxville McGhee Tyson Airport, TN 65 90 67 85 / 10 20 10 10 Oak Ridge, TN 65 90 67 85 / 10 20 10 20 Tri Cities Airport, TN 59 90 62 85 / 10 20 10 20.
The ridge of dry high pressure stretching from far northern Canada through ND and much of SD will remain across western and northern SD through much of the day Saturday.
The clear skies and light winds will support sub-freezing temperatures in the mountains and near freezing temperatures at lower elevations Saturday morning.
732 PM EDT Fri Apr 28 2017 A warm moist southerly flow will continue through the weekend, as a deep high pressure ridge strengthens off the Southeast coast. The mid level anticyclone will continue to build over and just off the Carolina and Southeast coast, ensuring net subsidence aloft, with steady warming through 850-700 mb, keeping the column capped. And the orientation of the mid level anticyclone will shunt any isolated mountain convection well to our NW.
952 PM EDT Fri Apr 28 2017 Showers and thunderstorms are expected tonight into Saturday as a warm front lifts north across the Ohio Valley. A much warmer airmass will be in place across the area through the weekend.
Winds will increase around mid morning Saturday for a few hours, but should weak some in the afternoon as low pressure form near the Mexican Plateau ahead of a cold front that will come through just beyond this period. Ridging will remain parked over the Southern U. Persistent low pressure over the Southern Plains, ahead of the mid level low, will keep the local pressure gradient tight and the switch to the wind machine on.
Surface wise, a strengthening western Atlantic ridge extend across the northern half of the Sunshine State. With our region lying on the southern half of a deep tropospheric western Atlantic ridge, large scale mid and upper level subsidence will predominate.
A cold front will begin to move into the area late this evening, resulting in a NW wind shift at CNM/HOB. /issued 144 PM CDT Fri Apr 28 2017/ Closed upper low will move down across the 4 Corners region later today and swing across NM Saturday.
Regardless, with winds decreasing and the lower levels of the atmosphere fairly moist due to recent rains, have decided to add mention of patchy fog across the area. Locations most prone to fog development will likely be the low lying areas and river areas. Large scale upper level trough lingers over the western US with main low center now located over CO/UT while a nearly stationary smaller scale upper low remains to to the north over SK/AB.
730 PM EDT Fri Apr 28 2017 Unsettled but warm weather is expected for the weekend with a crossing warm front. Most models push the warm front north toward the New York and Pennsylvania border where it stalls late day Saturday.
1218 AM EDT Sat Apr 29 2017 A cold front will cross the region this afternoon into the early evening. High pressure will build into the area tonight, followed by a stronger cold front later Saturday afternoon.
/issued 315 PM CDT Fri Apr 28 2017/ Southerly flow has returned to the ArkLaTex bringing much warmer temperatures areawide. Main focus of severe weather will be in the vicinity of a warm front that moved across the ArkLaTex earlier today and which is now located in central Arkansas. Storm development will occur along an eastward moving cold front, developing from the south and becoming linear through the afternoon as mid-level vort max aligns with eastward progressing storms.
/issued 406 PM CDT Fri Apr 28 2017/ A warm layer and weak ridging aloft have helped prevent the formation of thunderstorms, and this will likely continue to inhibit storms until about 8 pm or so. A very sharp cold front will move through the southeast half of Oklahoma and into north Texas tomorrow.
642 PM CDT Fri Apr 28 2017 A cold front continues to slide south across the Panhandles, winds have shifted out of the north and increased 15 to 25kts with slightly higher gusts. Ceilings will continue to lower behind the cold front but should remain VFR/MVFR until early Saturday morning. /Issued 443 PM CDT Fri Apr 28 2017/ Showers developing this afternoon across much of the Panhandles as a vigorous upper low near the Four Corners region digs south and east across central and eastern New Mexico tonight through Saturday.
605 PM MDT Fri Apr 28 2017 We sent out a quick update to include some freezing drizzle, fog and light snow in areas along I-80 between the Summit and Sidney Nebraska.
Winds should remain gusty overnight - and actually increase in speed - as the low level jet strengthens to 40-50kt by sunrise.
This evening a warm frontal boundary had entered into Southeast Oklahoma while a cold frontal boundary had pushed southeast into Northwest Oklahoma and Southeast Kansas. These two boundaries were associated with a surface boundary over Southwest Texas and an upper low moving into Northern New Mexico. the warm frontal boundary is expected to lift a little further north to perhaps near/slightly north of the Interstate 40 corridor while the cold push in Southeast Kansas moves into the northern part of Northeast Oklahoma. with the greater potential north of the warm front. any storms that can develop and be rooted with the warm front could have the potential to become more surface based. while parts of Northeast Oklahoma could fall into the lower 50s behind the cold push moving toward the region.
1021 PM EDT Fri Apr 28 2017 A warm front will develop over the lower Ohio Valley tonight.
Main forecast points for the overnight remain 1) well above normal temperatures for late April 2) possibility of dense smoke/mist combination near smoldering wildfires and 3) continued dry conditions with mid/upper level ridging keeping the local environment quite suppressed despite modest low-level available moisture. East-west oriented high pressure ridging moving north of ECFL. High pressure remains north of the local coastal waters.
516 PM MDT Fri Apr 28 2017 Current surface analysis shows low pressure now over eastern CO, with dry high pressure over ND. Upper level analysis shows broad upper trough covering the western and central US, with low pressure within it sinking south across eastern UT and western CO. Strong upper jet wraps around the low from the Pacific NW to the Southern Plains. The highest totals were in the Gillette area and across parts of southern Campbell County, where 6+ inches were reported, with around 12 inches in parts of the Gillette area. Upper level low will continue to sink south to the Four Corners area tonight, with remaining pcpn sliding south and west out of the area with it by this evening.
544 PM MDT Fri Apr 28 2017 Increasing clouds late tonight will prevent subfreezing temperatures in the Grand Junction vicinity tonight, but mostly clear skies will bring widespread freezing temperatures to the central Gunnison, Uncompahgre and North Fork of the Gunnison river valleys tonight. This low will then move east and northeast to southeast CO late tonight. As this low moves east, clouds will be draw from east to west across the forecast area late tonight. These clouds will spread over northwest and central CO preventing widespread sub- freezing temperatures in the Grand Junction Vicinity. Skies will clear again Saturday night which may lead to more freezing temperatures over west-central Colorado.
Storms have held off tonight with the warm front further north, and substantial capping evident through cloud cover this afternoon as well as local 18Z/00Z soundings.
The QG forcing will trend south of our CWA during the night tonight as the low exits to the south and southeast. Light snow or flurries will end this evening in the west as general troughiness exits the area. The associated cold front has reached most of Sweetwater County with KRKS having experienced the wind shift at 20z this afternoon as colder air continues to seep in. Elsewhere across the area on Saturday, skies should gradually clear through the day over the lower elevations, with mostly cloudy skies remaining over the higher terrain. Temperatures will possibly hit the low 50s around Cowley and Greybull, but remain in the 40s for another cool day.
A cold upper low near the Four Corners region will move slowly into the southern Plains by late Saturday.
805 PM EDT Fri Apr 28 2017 A warm front will develop over the lower Ohio Valley tonight.
728 PM EDT Fri Apr 28 2017 Warm front lifts through overnight.
The warmth will continue through the weekend as high pressure ridges over the state.
914 PM MDT Fri Apr 28 2017 Freezing fog, patchy freezing drizzle and light snow will be the main theme overnight across areas mainly along the I-25 corridor. We sent out a quick update to include some freezing drizzle, fog and light snow in areas along I-80 between the Summit and Sidney Nebraska.
At 08Z the cold front was roughly between Clarksville and Nashville. The upper level low that is moving northeast has strong gradient winds associated with it. Zonal winds behind the front and it will be cooler and dry through Tuesday.
A weak upper level trough will cross Western Washington today giving a little light rain.
/Issued 1057 AM CDT Mon May 1 2017/ Wrap around cloud cover in association with the departing upper level low continues to decrease across far northeast Oklahoma and northwest Arkansas.
12 UTC JAN sounding shows 40 to 50 kt westerly winds at 2 to 4 kft above the surface in the wake of the cold front which came through last night.
1200 PM EDT Mon May 1 2017 A cold front will bring widespread showers and thunderstorms today, followed by much cooler temperatures through late week. An upper trough will pivot eastward overnight with shower chances lingering.
905 AM EDT Mon May 1 2017 Showers with embedded thunderstorms will develop this afternoon as moisture and instability increases ahead of an approaching cold front.
This feature will drop southeastward into the Central and Southern Plains late Tuesday, then proceed to deepen as it digs farther southeast into the Lower MS Valley. The attendant cold front will begin to affect our northwestern-most counties late Tuesday night, where low-end POPs are in place.
623 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.
The upper low pressure system which brought widespread precipitation to our region was centered in northwest Missouri early this morning and this will lift out/depart the plains today. Heights rise behind the departing upper low and after days of widepsread cloud cover and intermittent precipitation, we will see some sunshine and a rise in temperatures. Models have trended warmer with highs today but have not gone quite as warm as guidance suggests due to the wet ground and the new snow accumulations across our west/southwest zones. The newly fallen snow in the west will melt quickly today with highs forecast well above freezing in the 50s/60s. The surface gradient will begin to relax today as the low pressure system departs, however deep mixing will continue to produce steady/gusty winds into the afternoon.
The upper ridge pattern is transitioning to a northwest zonal flow pattern with the next weak front moving in this afternoon into this evening.
The surface and upper low pressure systems continue to move slowly off to the northeast. The drier and cooler air will keep temperatures a bit lower or around normal values. The clouds are expected to thin tonight and mostly clear skies and cooler lows from the 40s over the north, to the 50s central and south. Continued dry with sunny skies for Tuesday, with a bit warmer temperatures in the 70s to lower 80s.
Breezing northwest winds today should keep temperatures a few degrees cooler.
Weak cold front currently moving across the CWA this morning providing a few scattered light showers. WV imagery currently showing an interesting boundary that is likely the combination of this front and were the influence of the clipper to our north meets the high and nw flow our west.
As this system moves out into the Plains tonight a surface boundary/weak cold front will move south out of Nebraska and into Northern Kansas. Tonight will need to monitor the potential for fog development but with increasing clouds ahead of the approaching upper level trough am unsure just how dense or widespread this fog may be. In addition to this increase in cloud cover ahead of the approaching upper level trough there may be enough instability and lift in the mid levels to produce some very light precipitation.
741 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.
Strong high pressure will build over the region starting Tuesday.
Main band of convection along and just ahead of the cold front is approaching the northwest and west currently and steady progress should sweep it east across the forecast area through this afternoon. The majority of the area should see prevailing surface winds remain below advisory levels through the day today, however the strong low- level jet is still expected to impact the higher terrain of the north Georgia mountains.
621 AM CDT Mon May 1 2017 As of this morning, upper level low pressure was centered over northwest Missouri, with widespread cloudiness associated with the ample moisture around the stacked low. Scattered showers will continue to rotate around the low this morning, but with primary focus for ascent on the northern periphery of the low and the progressive nature of the system to the northeast, precipitation chances should terminate by noon. A strong pressure gradient on the backside of the low will result in breezy northwest winds today, with peak wind gusts near 30 mph occurring during the late morning and early afternoon. High pressure will briefly move into the area late tonight into Tuesday in advance of the next upper wave.
/issued 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.
A cold front is very slowly moving through Central AL.
934 AM CDT Mon May 1 2017 Surface observations show that we got just a little bit chillier than forecast overnight, but also that temperatures have rebounded very quickly after sunrise, and so the forecast of temperatures in the lower to middle 80s under sunny skies looks on track. /ISSUED 317 AM CDT Mon May 1 2017/ Weak high pressure just off the Texas coast will continue to drift slowly east today. The high will bring sunny skies today. A return of low level moisture should keep min temps tonight a bit warmer.
Longwave ridge over western North America will shift over the Dakotas by the end of the period. Longwave trough over the central Pacific remains through the period. Another upper level trough develops over the West Coast by the end of the period.
1057 AM CDT Mon May 1 2017 Mid-morning sfc analysis shows high pressure centered nearly overhead. A deep cyclone and yesterdays active weather maker for the area was positioned over northern Missouri early this morning. Sharply drier and somewhat and cooler air has settled into the area south of this feature and behind an associated cold front now stretching along the Appalachians and through the central Gulf of Mexico.
The cold front continues to work its way across the region this morning. Showers and a few thunderstorms continue this morning ahead of a cold front that will be moving into central Kentucky shortly. No flooding issues look imminent tonight across the Flash Flood Watch area, but will likely hold on to it for a few hours until the cold front moves through. Cooler air will filter in today behind the front.
630 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.
631 AM CDT Mon May 1 2017 Circulation around upper level low that is exiting northern MO into the Great Lakes to dominate forecast today. Return to more seasonable warmer conditions will then be swift on Tuesday as upper level flow returns zonal.
/ISSUED 317 AM CDT Mon May 1 2017/ Weak high pressure just off the Texas coast will continue to drift slowly east today. The high will bring sunny skies today. A return of low level moisture should keep min temps tonight a bit warmer.
At mid morning, a cold front was moving across the Plateau with scattered showers. A large low pressure system was located over the Mid Ms Valley, spinning some clouds into our northwest counties and creating gusty winds across the region. At the same time, the low pressure system will be moving northeastward, toward the Great Lakes. Clouds that are wrapping around the low pressure system will push into our area, resulting in mostly cloudy skies across the northwest quarter of Mid TN.