Aikyam-Lab/Synoptic-Bench huggingface dataset:
It still appears that some light freezing drizzle may develop mainly during the overnight hours, as a strong front pushes southward. Any freezing drizzle or perhaps snow will not last long at any given location. In addition, some freezing fog/dz/br and -sn will be possible. Any precipitation should be short lived, but confidence is fairly high that temperatures should remain at or below freezing from OUN northward. A cold front will result in a brisk wind shift from the north from 09-12Z for all terminals.
High pressure will continue to bring dry weather through tonight. Mid and high clouds continue to flow over the northern periphery of the high pressure system just off the West Coast.
High pressure builds into the region later tonight and especially on Sunday. The dry weather will be short lived as a low pressure system moves into the region and snow overspreads the region early Christmas morning and continues through much of Christmas Day. Expect cooler air to continue to filter in this evening with lows in the teens to lower 20s. Dry weather is expected on Sunday as high pressure builds into the region with highs in the 20s.
742 PM EST Sat Dec 23 2017 A cold front will cross the region tonight bringing scattered showers to the area through Sunday morning.
We have extended the inherited Winter Storm Warning eastward thru TOR/BFF and Bridgeport. Breezy to windy around the mtns as well as falling pressures over the high plains sharpen the gradient.
The cold front stretching south has blasted through the CWA and is already east of Dekalb county. Temps as of 2pm are down into the lower to middle 40s, near 50 in a few spots east. The next upper trough, with the strongest lift to the north, will be digging into MO Sunday morning. As the front and trough pass through, guidance is showing some very light and isolated precip. Temps will be cooler thanks to the front today, in the upper 40s. Clouds will also start to clear out so the two of those things combined will drop lows Sunday night into the lower 20s.
1029 PM EST Sat Dec 23 2017 A cold front will cross the region tonight bringing scattered showers to the area through Sunday morning.
A weak cold front slides south across northern Minnesota today bringing another round of clouds and light snow today into this evening for parts of northern Minnesota. Mostly cloudy overnight as the cold front slows down, though as it crosses the international border from the north tonight there may be clearing skies for parts of far northern Minnesota. High pressure builds in from the northern Plains east into the Upper Midwest on Sunday leading to partly sunny skies.
Lows in the low to mid 60s across the area. High pressure will continue across the eastern Gulf of Mexico through Sunday afternoon ahead of an approaching cold front.
1008 PM EST Sat Dec 23 2017 Low pressure will cross the region tonight. High pressure will build across the region Sunday.
Temperatures are in the lower to mid 70s. In the low to mid levels of the atmosphere, an Atlantic ridge of high pressure will extend across Central Florida overnight. In the upper levels of the atmosphere, a ridge of high pressure will be located over the Bahamas tonight.
915 PM PDT Sun Aug 27 2017 The work week will start out exceptionally hot as strong high pressure intensifies over the Great Basin.
723 PM EDT Sun Aug 27 2017 Canadian high pressure will continue to prevail through Monday providing dry weather and below normal temperatures. High pressure and riding aloft will remain over the region through Monday night and will keep dry weather in place. Temps are expected to rise into the low/mid 70s today, then fall into the uppr 40s/low 50s tonight. Temps will be similar to Sun, but slightly warmer over the Finger Lakes (reaching the mid 70s).
648 PM CDT Sun Aug 27 2017 As of mid afternoon, a cold front extended from northern Missouri to central Kansas. An upper trough was over the Upper Mississippi Valley, with a trailing pv anomaly axis southwestward to north-central Kansas.
621 PM CDT Sun Aug 27 2017 Widespread thunderstorms associated with an upper level wave that developed just ahead of a slow-moving cold front are beginning to exit the forecast area. The cold front will push through the majority of the CWA by Monday morning, ushering in drier air. Areas of fog are expected after midnight across much of MO with the lowest visibilities in a line from Clark county to Vernon county in MO, where winds will be the most calm. The rest of the period should be VFR as high pressure settles south, dominating our weather.
921 PM CDT Sun Aug 27 2017 Widespread thunderstorms associated with an upper level wave that developed just ahead of a slow-moving cold front are beginning to exit the forecast area. The cold front will push through the majority of the CWA by Monday morning, ushering in drier air.
Breezy north winds across the eastern CWA this afternoon will diminish after sunset as high pressure moves over the region. Looking at mostly clear skies and light winds overnight, so undercut SuperBlend a bit and sided more towards cooler MOS guidance. With high pressure remaining in place on Monday, look for quiet conditions with mostly sunny skies and light winds. With 850mb temps nudging up to around +20C to +22C from the James River and points west, looking for highs to be warmer than Sunday, with readings in the mid to upper 80s.
Strong high pressure centered just north of the state today led to afternoon high temperatures well above average for late August. High pressure across the Great Basin will continue over the next few days.
Otherwise, cold front will progress through SW KS this evening with winds trending NE and briefly gusty. Somewhat cooler air will filter southward into western Kansas behind the boundary tonight dropping lows well down into the 60s(F) across the area. A generally dry pattern is expected across much of western Kansas through the middle part of the week as medium range models show upper level ridging building across the Great Basin and the Four Corners Region during the period.
627 PM CDT Sun Aug 27 2017 With high pressure settling in over the forecast area this afternoon through Monday, we will be looking at no precipitation and light winds through the early periods of the forecast. Could once again see some shallow ground fog Monday morning with clear skies and light winds, but it should be less widespread than we saw this morning due to a little drier air mass over the area with dewpoints dropping into the lower 50s vs.
527 PM MDT Sun Aug 27 2017 The strong upper level ridge is expected to persist over the region during the next couple of days.
732 PM EDT Sun Aug 27 2017 WV imagery and RAP analysis indicated a mid/upper level low near KDLH, resulting in cyclonic srly flow through the cwa. Southeast winds to near 30 knots late today will diminish to 15 to 25 knots tonight as low pressure weakens and sags to the south.
A trough remains to our north stretching across the Florida Peninsula from the central Gulf of Mexico to well east of New England. The evening sounding had a very dry layer in the low levels. The trough will linger through Monday, slowly lifting northward through Monday night. Low level ridging will continue to wedge in drying out the lowest levels. The ridging and the trough lifting northward will keep winds light through the next several days.
High pressure aloft will remain across the Great Basin early this week, allowing for very warm and generally dry conditions. High pressure remains centered over west-central Utah this evening. The high will gradually shift overhead the next couple of days.
1144 PM CDT Sun Aug 27 2017 With high pressure settling in over the forecast area this afternoon through Monday, we will be looking at no precipitation and light winds through the early periods of the forecast. Could once again see some shallow ground fog Monday morning with clear skies and light winds, but it should be less widespread than we saw this morning due to a little drier air mass over the area with dewpoints dropping into the lower 50s vs.
Upstream, a deepening upper trough will slowly push through the western Great Lakes. Mid level cyclone continues to slowly churn eastward from the western Great Lakes.
1139 PM CDT Sun Aug 27 2017 As of mid afternoon, a cold front extended from northern Missouri to central Kansas. An upper trough was over the Upper Mississippi Valley, with a trailing pv anomaly axis southwestward to north-central Kansas.
Drought stricken southern CWA getting some much needed rainfall, as showers have evolved into fairly widespread rain with embedded thunder south of I-80 aided by upper divergence in right entrance region of jet streak undercutting closed low over northern WI. The closed low over WI will shift south into the region on Monday and keep some chance of showers through the early portion of the week. With sunset then looking at a diminishing trend to any precip, although can't rule out a few showers especially north in closer proximity to digging closed low and weak impulse rotating down in the NW flow. Monday, the closed low will shift southward into N IL during the afternoon.
The higher coverage of storms will be over the Panhandles this evening where a semi-organized cluster has formed near Liberal Kansas. /issued 254 PM CDT Sun Aug 27 2017/ Models aggressive with convective development along weak cold front late this afternoon through this evening, primarily affecting northwest parts of Oklahoma.
932 PM EDT Sun Aug 27 2017 A ridge of high pressure will remain over Pennsylvania into Monday. Weakening low pressure in the upper atmosphere over the Midwest will lift through the region by the middle of the week, followed by a strong cold front crossing the area late in the week. High pressure retreats ENE of the region on Monday, allowing return flow of moisture to approach from the south and west. Highs on Monday afternoon will range from the low to mid 70s in most areas. Large high pressure over New England, along with a complex upper level low to the west, and a developing low across the southeast states will result in a cool northeast to southeast flow of air across the region Monday into Wed.
Clear skies continue tonight as high pressure builds across teh region. Synoptically, a middle- and upper-level ridge is in the process of building into the area and will be in firm control overnight and Monday. We followed suit with the previous shift and weighted the forecast toward the warmer and drier edge of model guidance, with minimum humidities Monday afternoon in the teens over western ND.
Freezing level was at 14,900 feet, the wet bulb zero was just below that at 14,600 feet, and the -20C level was at 27,800 feet. During this time, models show a trough dipping out of the Canada and moving across the Great Lakes. Its not until late this week that a secondary and stronger trough to the north pickups up Harvey, or whats left of it, a takes it northeast.
1047 PM MDT Sun Aug 27 2017 Current surface analysis shows weak high pressure over the area, with mostly sunny skies and light winds. Upper level analysis shows ridge building over the western states, with northwest flow over the Northern Plains. As ridge builds slightly east early this week, temps will rise to above average levels.
654 PM CDT Sun Aug 27 2017 A cold front extending from nw WI into eastern IA and nw MO will weaken as it pushes into central IL tonight, bringing increasing chances of showers and a few thunderstorms. Currently more widespread showers and isolated thunderstorms were nw of the IL river at mid afternoon ahead of the cold front and pushing slowly eastward toward the IL river. Lows tonight in the lower 60s.
643 PM CDT Sun Aug 27 2017 Clear skies continue tonight as high pressure builds across teh region. Synoptically, a middle- and upper-level ridge is in the process of building into the area and will be in firm control overnight and Monday. We followed suit with the previous shift and weighted the forecast toward the warmer and drier edge of model guidance, with minimum humidities Monday afternoon in the teens over western ND.
1002 PM EDT Sun Aug 27 2017 A ridge of high pressure will remain over Pennsylvania into Monday. Weakening low pressure in the upper atmosphere over the Midwest will lift through the region by the middle of the week, followed by a strong cold front crossing the area late in the week. High pressure retreats ENE of the region on Monday, allowing return flow of moisture to approach from the south and west. Highs on Monday afternoon will range from the low to mid 70s in most areas. Large high pressure over New England, along with a complex upper level low to the west, and a developing low across the southeast states will result in a cool northeast to southeast flow of air across the region Monday into Wed.
A westerly flow aloft along with high pressure will continue to produce warm to hot and very dry conditions across the region into the beginning of the workweek. Large ridge of high pressure will bring continued warming temperatures, dry conditions, and high fire danger through at least Monday. The ridge flattens somewhat on Monday, perhaps bringing some increased westerly breezes at times along with some of the driest air of the season to the area, resulting in localized critical fire weather conditions.
856 PM EDT Sun Aug 27 2017 Canadian high pressure will continue to prevail through Monday providing dry weather and below normal temperatures. High pressure and riding aloft will remain over the region through Monday night and will keep dry weather in place. Temps are expected to rise into the low/mid 70s today, then fall into the uppr 40s/low 50s tonight. Temps will be similar to Sun, but slightly warmer over the Finger Lakes (reaching the mid 70s).
Temperatures are in the low 70s to low 80s, but on track to overnight lows in the upper 60s to lower 70s. Surface analysis this afternoon places Tropical Storm Harvey near Victoria, Texas while a weak cold front is located over portions of Iowa and Kansas.
Meso models show low moving into ne Fl tonight before lifting back to the ne and over water on Monday potentially becoming a Tropical Cyclone along the Carolina coast. Winds and seas increased today due to tight pressure gradient on north side of low with strong high pressure to the north.
some slight decreases are possible early tonight, but should remain in the lower teens, with some gusts still developing.
A cold front extending from nw WI into eastern IA and nw MO will weaken as it pushes into central IL tonight, bringing increasing chances of showers and a few thunderstorms. Currently more widespread showers and isolated thunderstorms were nw of the IL river at mid afternoon ahead of the cold front and pushing slowly eastward toward the IL river. Lows tonight in the lower 60s.
KABI should be near the northern edge of the low cloud field. Expect MVFR ceilings with the low clouds. The low cloud ceilings should persist into late morning, with ceilings climbing above 3000 ft at our southern terminals by midday. KABI should be near the northern edge of the low cloud field. The low cloud ceilings should persist into late morning, with ceilings climbing above 3000 ft at our southern terminals by midday. With more sunshine, temperatures Monday will be slightly warmer, with highs in the mid 80s. They diverge somewhat by the end of the week, with the EC farther east in northern LA/southern AR, and the GFS closer to the Metroplex with the center of the low pressure center.
As Harvey weakens, and the 500 mb low tries to dig south a bit, the lows will move into Lake Michigan and spread rain showers across the region. The model (GFS, NAM, and ECMWF) soundings all show that overnight the low levels dry out for a time before moistening again Monday morning and and with the 500 mb low moving into N Lower, the chance for thunder is possible as the MLCAPEs begin to rise to around 500 J/kg. Again the low level moisture is the key here.
This will keep up precip-free Monday with dewpoints falling into the upper 50s for most locations for a good chunk of the day! Sfc ridging will also help tighten the pressure gradient as what will likely become Tropical Storm Irma intensifies over FL/GA/SC coastal waters. High pressure ridge centered over the New England states will continue to wedge itself down the eastern seaboard over he next few days. This ridge will keep the main developing low center just off the GA/FL coast moving NE. This ridge will also keep the area in stable easterly flow so mainly only expecting partly to mostly cloudy skies and maybe some light showers over southeastern portions of the state. With the easterly flow temps will also continue to cool with highs mainly in the lower to middle 80s and some 70s in the NE GA mountains.
A very hot weather pattern is expected across the Mojave Desert Region for much of the coming week as high pressure parks over southern Nevada and surrounding states. Limited moisture circulating around the area of high pressure will lead to isolated showers or thunderstorms over the mountains each afternoon. Any showers or thunderstorms that develop will be limited to the higher terrain. Any showers or thunderstorms that develop will be limited to the higher terrain.
KABI should be near the northern edge of the low cloud field. The low cloud ceilings should persist into late morning, with ceilings climbing above 3000 ft at our southern terminals by midday. With more sunshine, temperatures Monday will be slightly warmer, with highs in the mid 80s. They diverge somewhat by the end of the week, with the EC farther east in northern LA/southern AR, and the GFS closer to the Metroplex with the center of the low pressure center.
812 PM MDT Sun Aug 27 2017 Another quiet evening with a strong ridge overhead.
829 AM CST Thu Feb 22 2018 Arctic high pressure was centered over the Great Lakes with low pressure developing over Colorado. Clear and cold to begin the day as weak high pressure remains over the forecast area. Little or no snow is expected west of a line from Selfridge to Bismarck and Carrington.
Early this morning areas of freezing drizzle continue across the area. Temperatures are in the mid to upper 20s at most locations, except far southeast sections of the forecast area where temperatures were right around freezing. Google maps traffic data continued to indicate travel impacts from yesterday's sleet and freezing rain, and the ongoing freezing drizzle. Current observations and recent model performance would suggest temperatures will stay below freezing across much of the area this morning, warming above freezing first in our southeast counties, and then eventually elsewhere by evening. If more widespread/heavier precipitation were to occur, this could help mix down warmer temperatures aloft and result in a rise in temperatures above freezing more quickly.
Amounts will vary widely with 1-3 common and 2-5 possible on passes, summits and ridges.
/issued 359 AM CST Thu Feb 22 2018/ An upper level ridge is currently centered north of the Bahamas and extends into the Bay of Campeche. The main upper trough axis currently west of the Rockies will finally lift northeast and race across the midsection of the country this weekend.
Traffic slowdowns are becoming more frequent (particularly on area overpasses) per Google traffic data, so with no definitive break foreseen with freezing drizzle until later this morning, have issued a Winter Weather Advisory for the entire forecast area until noon. By later this morning, much deeper and drier SW flow will overspread the region in association with an upper trough lifting across the Colorado Plateau. In advance of another upper trough tracking even closer to the region by late Friday, low level moisture should return to most of the area on backing surface winds. NAM looks the most reasonable with its depiction of widespread stratus Friday night and some drizzle or light rain (temps are expected to remain above freezing this time around).
Issued by National Weather Service JACKSONVILLE FL 950 AM EST Thu Feb 22 2018 Ridge of high pressure extends across the region with mean low level flow from the south and southeast. Another very warm day with partly cloudy skies and highs in the lower to mid 80s inland. Latest surface analysis shows a stationary front well north and west of our area, stretching from Louisiana northeastward through Tennessee and Virginia under the eastern flank of a large upper level trough. Light southeasterly flow prevails across our area, with dry conditions persisting under the western portion of deep layer ridging.
The cold front has nudged further to the south and east and is currently located just to the north of Richmond, VA stretching to the west to near Nashville then southwestward to near Houston. The southeastern upper level ridge will hold strong today and should limit most of the precip. The lack of forcing will be the limiting factor today with the highest PoPs along the Cumberland Plateau closer to the boundary. Chattanooga Airport, TN 80 61 79 60 / 30 20 10 30 Knoxville McGhee Tyson Airport, TN 78 58 77 59 / 30 20 10 30 Oak Ridge, TN 77 59 78 59 / 60 20 10 30 Tri Cities Airport, TN 77 55 77 54 / 30 20 10 20.
551 AM CST Thu Feb 22 2018 Today: As expected most of the good lift ends around 1200 UTC, with mainly freezing drizzle during the morning. Appears area roughly along/west of the turnpike will remain cold enough for freezing rain/freezing drizzle well into the afternoon. Temperatures should finally warm above freezing areawide on Friday although there still may be fairly extensive cloud cover.
However, the line is elevated behind the cold front at this, but may become more surface based as the line pushes further east. The showers and thunderstorms should make good progress eastward through southern middle TN and far north AL, with weakening expected as the low level jet weakens during the day. The frontal boundary will be to lift northwest as a warm front today, but the NAM suggests additional showers and thunderstorms that will track across far northwest AL into middle TN.
/issued 352 AM CST Thu Feb 22 2018/ Currently band of moderate to heavy rainfall was to the south of I-40 and along and north of a stalled cold front from near Greenwood to Fulton Mississippi.
342 AM MST Thu Feb 22 2018 Current surface analysis shows high pressure east of the region, with low pressure across southern CO. Upper level analysis shows large scale trough digging southeast across the western states, with southwest flow ahead of the trough across the Rockies and Plains. A wide range of temps across the area as usual this morning, ranging from the teens below zero in the valleys of northwest SD to the teens above zero over far southern SD where there is some wind to mix out the low levels.
The area of concern looks to be along and just west of the Kansas turnpike, where surface temperatures will remain near or just below freezing. While lighter accums from mainly freezing drizzle will affect northwest portions of the area in central Kansas, plan to stay with advisory as well. KED Today: As expected most of the good lift ends around 1200 UTC, with mainly freezing drizzle during the morning. Appears area roughly along/west of the turnpike will remain cold enough for freezing rain/freezing drizzle well into the afternoon. Temperatures should finally warm above freezing areawide on Friday although there still may be fairly extensive cloud cover.
905 AM EST Thu Feb 22 2018 Low pressure passing south of the area will cause rain to move off to the east by this afternoon. For our northwest zones, temperatures are creeping above freezing. Along with road sensors above freezing, so the Winter Weather Advisory has been cancelled. Highs will range from the lower 40s north to near 50 south of the Ohio River. More widespread precipitation will move out of the area with the low level jet. As this happens, a warm front will then be able to lift across the area late tonight into Friday morning. A cold front will quickly follow in the afternoon.