Aikyam-Lab/Synoptic-Bench huggingface dataset:
1045 AM EST Wed Jan 17 2018 Currently - A strong high pressure system, centered over the south central United States is driving a reinforcing dry cold front southwards towards the Keys. Short Term Update - High pressure spreading southwards across the Gulf of Mexico will gradually strengthen and back winds more northerly. Winds are expected to surge this evening as a reinforcing dry cold front speeds across Keys waters. Expect winds to surge this evening out of the north as a dry cold front blasts through the area.
943 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 through the work week.
The lowest temperatures for this area coincided with this highlighted region of colder IR values. A weak trough moves through Thursday but will have very little impact on the warming trend. An upper level ridge will elongate over the Plains heading into the weekend.
Expect an additional tenth to a quarter of an inch will be possible across the Northern Valley with an additional half an inch in the foothills and approaching an inch in the highers elevations of E TN and SW VA. Chattanooga Airport, TN 23 12 41 20 / 10 0 0 0 Knoxville McGhee Tyson Airport, TN 20 9 37 17 / 10 0 0 0 Oak Ridge, TN 22 8 39 17 / 20 0 0 0 Tri Cities Airport, TN 19 8 37 13 / 30 0 0 0 TN.
503 AM CST Wed Jan 17 2018 Hard Freeze conditions set up overnight with lows mainly in into the lower teens, and some single digit readings across AR/OK portions of area. Near perfect radiation cooling conditions with clear skies and calm winds will send temps back into the lower to middle teens areawide, as dewpoints in single digits could even mix down a few more degrees this aftn. As the high pressure begins to migrate east later this week, temperatures will begin to rebound in warm air advection.
Weak high pressure aloft will keep the region dry today into tonight, as increasing westerly winds help warm temperatures above normal through Thursday.
High pressure will rebuild over the southwest part of the country into Thursday with continued above normal temperatures. This ridge will shift to the east as a trough digs toward the California coast.
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.
332 AM MST Wed Jan 17 2018 Overnight water vapor imagery showed a upper trough axis from the eastern Great Lakes to the lower MS Valley. A upper ridge dominated much of the western CONUS. Skies were clear with temperatures 15 to 25 degrees warmer compared to 24 hours ago. There is good model/ensemble consensus progging the upper ridge to gradually translate east across the Rockies into the Great Plains.
826 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. Recent satellite imagery reveals an expansive cloud deck persisting over the area under the upper-level trough swinging through. Modest clearing is expected west to east overnight, but clouds and potential for light snow will last longest over the highest elevations. Despite high pressure nosing in at the surface and modest warming in the mid-levels, the pressure gradient aloft will lend itself to maintaining wind, especially over the Ridges tonight. We may need a Wind Chill Advisory for at least the higher terrain tonight.
1122 PM CST Wed Nov 8 2017 The warmer weather we've experienced today will be replaced by much cooler weather tomorrow. The next strong cold front racing southward through the Dakotas will reach northeast NE this evening and just north of I80 through midnight, then into KS and the IA/MO border by Thursday morning. Still breezy in the morning, but winds gradually relax in the afternoon as high pressure builds in from the north.
It'll be a chilly start with several locations below freezing.
Will see warm advection return to the area for tonight through most of the daytime hours on Thu, at least for the southern half of KS, with low temperatures a little warmer overnight. This will probably lead to slightly cooler temps for central KS on Thu, but some compressional heating south of the boundary will lead to max temps similar to today for most of southern KS. The warm advection will also increase the low/mid level moisture, which will increase cloud cover on Sat, which will temper the warmup somewhat. These clouds would occur just behind the surface cold front.
303 AM CST Thu Nov 9 2017 At 2 AM CDT, a vigorous cold front bringing the coldest air of this fall is poised to arrive in northwest sections the next 3 hours with brisk winds of 15 to 25 mph.
1056 PM CST Wed Nov 8 2017 Warmer, slightly more seasonable conditions this afternoon will be replaced by a fast-moving cold front Thursday morning, and while sunshine will allow for a few degrees of diurnal rise tomorrow afternoon, cold-air advection will hold highs in the lower to mid 40s.
/issued 341 PM EST Wed Nov 8 2017/ A slightly drier day as South Florida remains under the influence of deep layered high pressure.
109 AM EST Thu Nov 9 2017 Strong cold front tonight.
238 AM MST Thu Nov 9 2017 Late night GOES-R water vapor loop depicted a deep upper trough over the Upper Midwest, an upstream ridge axis from the Four Corners to western MT, and an intense upper low spinning west of the Pacific Northwest coast. A cold front was located along the leading edge of low/mid level clouds from northeast WY to northeast NE. The cold front to the north of the CWA will move southeast across the plains this morning. Will see an increase in clouds, a wind shift to the northeast, and cooler temperatures behind the front. High temperatures east of I-25 this afternoon will be 5-10 degrees cooler.
As a result this area may see more lows in the lower 30s with the coldest spots even reaching upper 20s. The rest of south central and east central KY still look to bottom out in the low-mid 30s. Mid-afternoon satellite imagery showed a mix of sun and clouds across southern Indiana and central Kentucky while regional observations had northeasterly winds and readings in the lower to middle 50s. Through tonight, high pressure will slowly nose into the lower Ohio Valley and skies should go mostly clear to clear overnight. This will setup a chilly night with overnight temperatures falling into the lower to middle 30s. Look for mostly sunny skies and slightly warmer temperatures Thursday ahead of an approaching cold front. With a brisk and chilly wind, lows Thursday night will range from the middle 20s to around the freezing mark.
/22/ Prior discussion below: Tonight through Thursday: Latest Rap and Satellite imagery showed flat ridging through the atmosphere.
238 AM MST Thu Nov 9 2017 Late night GOES-R water vapor loop depicted a deep upper trough over the Upper Midwest, an upstream ridge axis from the Four Corners to western MT, and an intense upper low spinning west of the Pacific Northwest coast. A cold front was located along the leading edge of low clouds from central WY to southern NE. The cold front will move southeast across the plains and stall along the Laramie Range this morning. Will see an increase in clouds, a wind shift to the northeast, and cooler temperatures behind the front. High temperatures east of the Laramie Range this afternoon will be 5-10 degrees cooler.
Upstream from this trough a fairly weak ridge exists across the Rockies while another potent closed circulation is sitting off the coast of the Pacific Northwest states. However, latest objective surface analysis depicts a cold front pushing southward across Nebraska into northeast Colorado with reasonable pressure rises seen behind it.
Weak upper trough axis expected to work across the mid-state overnight and that will push current light precip well east.
451 AM EST Thu Nov 9 2017 A weak area of low pressure will pass by harmlessly to the south of Pennsylvania today.
For 06z Aviation discussion below A strong cold front will move through the region tonight and bring the coldest air of the season to Minnesota and Wisconsin. Early afternoon satellite imagery showed a broad upper level trough over central Canada with subsidence and northwest flow over the high Canadian prairies.
/issued 953 PM CST Wed Nov 8 2017/ Areas of RA that continues this evening over portions of lower E TX/N LA/Scntrl AR ahead of a well-defined upper trough noted on the water vapor imagery over NW AR/SE OK/Wcntrl TX, continues to gradually shift ESE, as dry slotting noted in the Channels 9 and 10 water vapor imagery has begun to entrain SE. Still seeing sporadic reports of -DZ which has resulted in reduced vsbys associated with the low stratus shield over extreme NE TX/SW AR where the RA has ended, and thus have maintained slight chance pops this evening for these areas before the cigs begin to lift/scatter out late. This diminishing cloud cover should result in cooler temps tonight over SE OK/SW AR, where min temps should fall to near 40 degrees by daybreak.
Cold front will continue drifting southward this morning with the supporting upper low swinging through south central Alabama midday and central Georgia later this afternoon. Already an increase in showers developing across AL/MS and trend will continue ahead of the upper low. High temperatures will be cooler with northern extent through SE AL/SW GA with expected cloud cover and higher chance for rain. Across the Big Bend, dewpoints will remain in the 60s today with highs in the low to mid 70s.
A sharp cold front and its associated clouds can be seen extending across/bisecting Iowa, and it'll make rapid passage later today/this afternoon.
348 AM CST Thu Nov 9 2017 The cold front is just about through the forecast area reaching into north central Kansas as of 3am. There could be a chance for patchy freezing drizzle late tonight over southwest portions of the area with lift across the area.
353 AM CST Thu Nov 9 2017 High pressure ridge axis over the region this morning, with little in the way of cloud cover for most of the night. Temperatures have dropped below freezing across Central IL, providing a chilly start to the day. A dry cold front moving through the region today will bring down a shot of cP air into the Midwest and result in a very cold night.
Narrow high pressure ridge continues to stretch from the western Atlantic across the Florida peninsula and GOMEX this morning. Fast-moving positive tilt short wave trough will move rapidly through the SE CONUS today and into the western Atlantic tonight.
Disturbances rotating around an upper low about 250 miles offshore will give showers to the area through Thursday evening.
256 AM MST Thu Nov 9 2017 A ridge will continue moving over the area today with dry conditions and high temperatures warming 5 to 10 degrees. A weak upper vort max is riding through the ridge providing some uplift for higher level clouds and drawing moisture into the area.
1238 AM EST Thu Nov 9 2017 High pressure will extend across the region into Thursday. A cold front will sweep across the area Thursday night. Canadian high pressure will build in for the end of the week.
The high pressure moves east overnight, with breezy south to southeast winds developing. The eastern CWA will be under the influence of the high the longest, which will keep winds light until later at night, so still plenty of time for temps to drop. Dropped tonight's lows into the single digits over the eastern CWA, with warmer teens over western areas where breezy winds are expected all night.
Clouds will continue to invade from the northwest, behind a cold front that is sinking across southern portions of SD. Cooler air is beginning to sink in from the northwest.
This will send the remaining depth of the cold front through the area causing skies to slowly clear through today.
230 AM CST Thu Nov 9 2017 Surface cold front associated with the upper trof moving across the Upper Midwest/Great Lakes today will drop south across central and southern Kansas.
249 AM CST Thu Nov 9 2017 Northwest flow aloft was the rule over central portions of the CONUS early this morning behind the old broad trough axis. VAD wind data from nearby radars indicating westerly flow over the lower several thousand feet of the troposphere ahead of the front, helping keep temps in the upper 20s and 30s despite fairly clear skies. The cold front passes through during the morning and early afternoon, with a dry low to mid troposphere keeping any precipitation from forming and cloud cover largely limited to the upper levels. Overnight warm-air advection on the aforementioned west winds keeps highs close to Wednesday's levels in the south, with temps struggling to break the lower 40s in the north.
A strong 150 knot 250 mb jet max is rounding the base of the northern stream trough axis that is moving across the western great Lakes this morning, reaching the eastern great lakes this evening. 850-700 mb saturation early this morning, quickly dries behind the exiting cold front. Only a brief period of low level moisture just behind the cold front. Wind will be an issue behind the cold front today, with northwest wind gusts to 25 to 35 mph.
1028 PM PST Wed Nov 8 2017 A cold front will bring possible precipitation from Lompoc and northward into Thursday.
-KT Low clouds and some fog were still hanging tough over the lower elevations of southern El Paso county and northern Pueblo county. The cool front will bring another shot of slightly cooler air to the the far eastern plains, and max temperatures this region will only reach into the 45-50F range. Farther west along the I-25 corridor it will be a bit warmer than today with reading in the mid 40s to mid 50s.
441 AM EST Thu Nov 9 2017 Clouds will continue to increase this morning as an upper level system and strong cold front approach.
1042 PM MST Wed Nov 8 2017 Weak ridging continues to build in as temperatures are running about 5 degrees cooler than yesterday. Expect morning lows to be warmer than we've seen recently due in large part to those clouds. Flow becomes more zonal on Thursday as a broad area of high pressure sets up to our south and the next low pressure system approaches the northwest.
228 AM EST Thu Nov 9 2017 High pressure will retreat into New England, as a weak area of low pressure passes south of Pennsylvania tonight into Thursday.
Water vapor imagery shows a broad/elongated trough from the Great Lakes to the Arklatex. Sheared energy in the base of this trough was helping to produce a broad swath of precipitation across portions of Mississippi and Alabama. What lingering rainfall remains Sat morning will continue to quickly exit to the E, as another large dome of high pressure settles into the Great Lakes states.
901 PM PST Wed Nov 8 2017 A weak cold front will approach the area late tonight bringing cooler temperatures and increasing clouds.
First band of snow continues to sag southward through the FA, but so far has been along and north of the highway 2 corridor. With the colder air and clearing skies moving over the warmer large lakes in the FA, also expect more lake effect streamers to occur throughout the tonight and Thursday time frame.
911 PM MST Wed Nov 8 2017 Current surface analysis shows cold front stretching east to west across far southern SD and northern WY. Upper level analysis shows weak ridging over the Rockies, with west-northwest flow across the Northern Plains. Cold front will push south of the forecast area by early evening, with colder conditions expected through Thursday. Lows tonight will mostly be in the teens, with highs on Thursday ranging from the low to mid 20s across far northwest SD to the upper 30s over parts of northeast WY.
The high temperature forecast for today ranges from the low teens north, to the upper 20s south.
348 AM EST Thu Nov 9 2017 A 500mb ridge that was to the west, has weakened as a short wave is making its way across the deep south. A developing low off the Carolina coast, just ahead of the short wave, will bring a cold front into north Florida today. High pressure will build to the north, causing the pressure gradient to increase over the area, resulting in breezy conditions for the Atlantic coastal areas.
/issued 614 PM EST Wed Nov 8 2017/ Another benign weather evening over the Florida peninsula as upper ridging is still hanging on. with a weak ridge axis aligning across the central peninsula from the the Atlantic. A weak cold front will be approaching the terminals from the north during the day Thursday.
328 AM EST Thu Nov 9 2017 A cold front will move across the region late this afternoon and this evening. High pressure will build in for the end of the week.
1150 PM CST Wed Nov 8 2017 Arctic high pressure centered over the western Plains of Canada. Hudson Bay low at h5 with ridge between aforementioned low and Gulf of Alaska low. Cold front from southern plains follows coast northeastward along the east coast. Quiet conditions are expected for north central Nebraska as a strong upper level ridge builds across the western US resulting in high pressure across the central US. Expect highs to only reach into the mid 20s across the northeast forecast area (O'Neill area) to the low 40s south of I-80. low temperatures will hold in the low to mid 20s.
Tonight and Thursday A strong cold front will move through the area tonight into early Thursday, providing a short burst of light to moderate snow. Lows tonight will vary greatly given the early passage of the cold front across north-central Wisconsin with lows in the middle to upper teens across this area, with lows in the 20s across central and east-central Wisconsin. Skies will clear from west to east on Thursday behind the cold front, however despite the afternoon sunshine highs will be much cooler ranging from around 20 across north-central, with highs around 30 across east-central and the lakeshore counties.
115 AM EST Thu Nov 9 2017 Clouds will continue to increase this morning as an upper level system and strong cold front approach.
316 AM CST Thu Nov 9 2017 Latest water vapor imagery shows models have a pretty good handle on the movement/position of the upper low swinging toward the area from northwestern Mississippi. The coldest/driest air over the CONUS will remain centered over the Upper Midwest and southern Canada behind a second stronger cold front that will not push through the area until late tonight.
Skies will gradually clear and become mostly sunny by late afternoon as high pressure builds over the region. Temperatures are expected to remain below over the next few days with this area of high pressure in place.
1126 PM CST Wed Nov 8 2017 No significant changes to the forecast at this hour, with a strong cold front still on pace to sweep across the forecast area from west to east between about 4 AM and 9 AM Thursday. A strong cold front will move through the terminals early Thursday morning, with winds becoming gusty from the northwest behind the front. There are a few light snow showers upstream over northern MN along the cold front. Cold advection will then be pronounced for Thursday as front will be off to the east and northwest winds will usher in a chilly low level thermal trough.
High pressure aloft will move east away from Utah tonight.
208 AM EST Thu Nov 9 2017 Clouds are leaving the area at this time, as an upper low travels by to our south.
1211 AM EST Thu Nov 9 2017 High pressure should maintain dry weather today.
213 AM EST Thu Nov 9 2017 Strong cold front tonight.
This means that accumulating snow is going to be rather limited across the area with accumulations being left to the higher elevations like Crater Lake Rim, and Mt. With temperatures decreasing with night fall, black ice may be possible in some of the higher elevations, like Diamond Lake where it rained for most of the day.
some sunshine this afternoon will help moderate the cool air mass that has settle over the area and highs today should climb a few degrees warmer that Wendesday.
413 AM EST Thu Nov 9 2017 High pressure should maintain dry weather today.
331 AM CST Thu Nov 9 2017 Patchy fog is developing under a clear sky and light wind regime, but has not thickened up appreciably, especially along and adjacent to the higher terrain where low clouds have lingered/expanded overnight. We could still see a few locations drop to around freezing this morning, but mainly east of an Andrews to Greenwood to St Lawrence line.
334 AM CST Thu Nov 9 2017 High pressure ridge axis over the region this morning, with little in the way of cloud cover for most of the night. Temperatures have dropped below freezing across Central IL, providing a chilly start to the day. A dry cold front moving through the region today will bring down a shot of cP air into the Midwest and result in a very cold night.
Fairly dense cirrus sliding down the front side of the eastern Pacific ridge will continue to increase the rest of today and tonight and the sky grid values were bumped up a little to account for this.
1042 AM MST Fri Dec 22 2017 Southern CO will be between weather systems today and thus the weather will be dry, and temps will be warmer in most locations. Tonight, as an upper trof drops into the northern Rockies and northern plains states the gradient aloft will increase, bringing stronger winds to the higher elevations. By morning there could be a couple or three inches of snow accumulation, mainly over the higher elevations of western Lake county, with lesser amounts over the rest of Lake county and the high elevations of western Chaffee county. Winds will help keep warmer temperatures across the Plains Saturday afternoon, with highs in the 50s.
Latest IR/WV imagery shows clear skies across the forecast area with the trough axis now off to our east in New Mexico. Another night of favorable radiational cooling across the area tonight, though temperatures won't be quite as cold, so while a hard freeze is not expected for the deserts, temperatures will still bottom out around or just below freezing. Rapidly increasing height and thickness values this weekend with west to northwest flow as an upper ridge will reside off the west of the Baja peninsula.
Light snow showers will continue this evening and into tomorrow morning as the region is under northwest flow behind the a recent cold front.
/issued 558 AM CST Fri Dec 22 2017/ /12Z TAFS/ Mostly MVFR/IFR this morning behind a cold front, as showers move across the eastern half of the area. /issued 428 AM CST Fri Dec 22 2017/ (Today and Tonight) Cold front has pushed through most of the forecast area, and should clear the last row of counties in the next hour. Colder air is starting to filter in to the Big Country, with temperatures now only a few degrees above freezing. Clearing should occur after midnight tonight, with temperatures falling just below freezing for most areas by sunrise.
A cold front is located across western TN and KY extending northeastward into the Ohio River Valley. While the angle of winds and lack of strongly negative omega across the mountain foothills do not favor a mountain wave high wind event, believe that the very strong 850mb winds will still result in Wind Advisory criteria high winds across the higher elevations of the TN/NC mountains. May also have some gusty, sub-advisory winds along the plateau, southwest Virginia, and along ridgetops within the valley.
with additional rains tonight and at least early Saturday until the strong cold front arrives. will be common from now until shortly after the passage of the cold front.