Aikyam-Lab/Synoptic-Bench huggingface dataset:
Axis of weakening high pressure ridge continues to extend from the western Atlantic into the SE seaboard. The continued southward migration of the ridge axis toward Florida will result in calm to light S-SW winds late tonight. Highs will be warmer from 80-83 degrees.
This could bring a resurgence of some higher gusts later this evening through early Wednesday morning, especially in the elevated areas from Brookings county over to the Buffalo Ridge. Can't discount the potential for an isolated lightning strike this afternoon, nor the risk for very small graupel or even a big burst of snow pellets given depth of develop above the freezing layer, sub-freezing wet-bulb, and potential for rime. Will not make any changes to ongoing headlines, with expectations that we should be able to drop the advisory at 00z for most of the area, but the highest winds continue over the Buffalo Ridge well into the evening. Wednesday: A weak trough will move through the area during the day, bringing a reprieve from the strong winds of the past two days.
/issued 315 PM CST Tue Mar 7 2017/ Zonal flow will persist across the FA through Wednesday with dry conditions prevailing at the lower levels through the overnight hours.
Showers continue across mainly the SE half of the mid state as the cold front passes through the region.
321 PM MST Tue Mar 7 2017 High pressure building into the western states will send the storm track (jet stream) northward and out of our forecast area for the next several days.
Presently, the cold front still lies to the west of the area approaching the Plateau counties. Chattanooga Airport, TN 42 69 39 71 / 60 0 0 0 Knoxville McGhee Tyson Airport, TN 41 65 36 68 / 50 0 0 0 Oak Ridge, TN 40 64 36 69 / 50 0 0 0 Tri Cities Airport, TN 39 62 30 66 / 80 0 0 0.
956 PM CST Tue Mar 7 2017 The main band of showers and thunderstorms, focused on the outflow boundary, continued to outrun the cold front and was pushing mostly offshore.
420 PM MST Tue Mar 7 2017 Northwest flow is in place3 over our CWA on the western side of large scale upper low (centered over southeastern Canada). Temps aloft moderate with lee trough redevelops and bias corrections indicate potential of lower 70s across much of our CWA.
Wednesday will be warmer, with highs in the 40s and 50s across much of the state.
1021 PM EST Tue Mar 7 2017 A weak cold front will move through the area early Wednesday bringing scattered to numerous showers overnight.
949 PM EST Tue Mar 7 2017 Aviation section updated The cold front that pushed through central Indiana last night has pushed farther into the Ohio Valley. So, rain showers have ended across the forecast area, and drier air continues to filter into northwest Indiana with strengthening high pressure.
949 PM EST Tue Mar 7 2017 Showers will end this evening as a cold front travels east. High pressure will move in behind the departing front, bringing dry weather late tonight through Wednesday.
Needless to say, this has been an impressive storm as the center of the low is now way up in northwest Ontario. Currently, cold air advection on the backside of the large low pressure system to our northeast coupled with unidirectional winds and the mixed layer increasing in height has resulting in very strong winds aloft reaching the surface across much of western and central ND today. All counties within the blizzard warning have verified as of this writing, along with the majority of the high wind warned areas.
There could be a few showers tomorrow along the East Coast as a weak cold front approaches the area from the north. High pressure will continue to dominate the weather across South Florida through most of the week. A weak cold front will move into North and Central Florida on Wednesday and it will stall out in Central Florida Wednesday afternoon.
A rapid warmup can be expected over the next couple of days with high temperatures in the lower deserts climbing well into the 80s by Wednesday.
710 PM CST Tue Mar 7 2017 Deep low pressure located well north in northern Ontario along with continued cold air advection has led to strong winds across the Northland into this evening. The upper level low will continue to move off to the north and east Wednesday night, but the upper level flow will continue out of the northwest for the end of the week and into the weekend.
Highs will primarily be in the 50s, except a bit cooler near Lake Michigan.
The cold front is currently located just west of the Cumberland Plateau and should complete its trek across our CWA by 02Z.
Tonight through Wednesday: Latest satellite vapor imagery showed an upper trough tracking into the Mississippi Valley. This was associated broken line of convection along a cold front that was tracking across the region from Dekalb to Mendenhall to Bude. A cooler and dryer airmass will push into the region. Lows for tonight will range from the lower 40s north to the lower 50s southeast. For Wednesday we will have a dry airmass in place with highs in the lower 70s.
/issued 247 PM CST Tue Mar 7 2017/ The cold front associated with the low pressure system sweeping across upper midwest has made it's way to the Big Bend and bringing with it some cooler temperatures. Zonal flow will take over in the wake of the passing upper trough for the next couple days. A trough off the coast of Baja will be the next driver of weather by the end of the week.
Clearing line will move in starting around 8z at TCL and through TOI by around 18z Wed as high pressure builds across Alabama. 08 A line of showers and thunderstorms will move through the area ahead of cold front today and tonight.
548 PM CST Tue Mar 7 2017 Water vapor imagery this afternoon shows the axis of a large trough sweeping east of Missouri, allowing a northwest flow to spread across the Lower Missouri River Valley, which will persist across the Plains through the end of the work week.
The High Wind Warning remains in effect until 6 PM CST. Large scale pattern features a long wave trough roughly over the Central CONUS with a closed low over the MN Arrowhead region, southern Manitoba and western Ontario at the start of the period. Elsewhere, 500 hPa flow is quasi-zonal over the West Coast and a ridge is present east of the trough over the Middle Atlantic states and Northeast US. The trough and aforementioned closed low will lift northeastward over the next 24 hours with a zonal oriented mid-level flow prevailing across the CONUS. Thereafter the ridge moves off east and a lee side trough develops near the Front Range across the Central High Plains. Westerly downsloping winds continue at low- levels tomorrow with warmer temperatures expected compared to today.
The Central California Interior is entering a dry and warming trend as a ridge of higher pressure moves across the region.
While a moist zonal flow is forecast to persist over the Pacific Northwest and far northern California through a portion of the week, building high pressure of the central California coast will maintain dry weather conditions across our region through much of the week.
Temperatures will be around 10 degrees cooler than today with mostly sunny skies.
sfc cold front was analyzed over nern AL to srn MS to srn LA with a weakening squall line over central GA to srn AL. Winds will veer as cold front approaches the area through Wed morning.
With the high winds and dry conditions, fire danger will be very high through the rest of the afternoon. With breezy conditions, have gone with a warmer model guidance for lows tonight. High pressure building into the western Dakotas will bring light winds for at least the western half of the CWA on Wednesday.
713 PM EST Tue Mar 7 2017 A weak cold front will move through the area early Wednesday bringing scattered to numerous showers overnight.
539 PM EST Tue Mar 7 2017 Showers are expected today with the approach and passage of a cold front.
807 PM MST Tue Mar 7 2017 Only cosmetic changes to the grids this evening, primarily dropping the high wind warning headline that expired at 5 pm. Still seeing wind gusts of 40 to 50 mph in the High Wind Warning area, although speeds have been stepping down incrementally for the past couple hours. Will let the High Wind Warning continue through the original expiration. This should produce less wind tomorrow at most locations along with warmer temperatures. A flattened upper level ridge will be over the state with flow out of the NW.
High pressure will continue to dominate the weather across South Florida through most of the week. A weak cold front will move into North and Central Florida on Wednesday and it will stall out in Central Florida Wednesday afternoon.
Strong upper level low pressure system spinning through Hudson Bay region continued to affect the Central Plains this afternoon, causing scattered instability showers and strong west to northwest winds. That leaves us with clear skies and light winds, and along with a dry atmosphere, expect lows to drop to or below freezing all of central Nebraska and north central Kansas overnight. Mid level flow pattern is forecast to remain west-northwest into the weekend as Hudson Bay upper low rotates east and northeast and another low remains well out in the Pacific.
Thus, let the high wind warning expire and issued/extended the wind advisory through tonight into Wednesday morning. With the high winds and dry conditions, fire danger will be very high through the rest of the afternoon. With breezy conditions, have gone with a warmer model guidance for lows tonight. High pressure building into the western Dakotas will bring light winds for at least the western half of the CWA on Wednesday.
/issued 341 PM CST Tue Mar 7 2017/ The cold front has moved east of the area this afternoon, with much drier air advecting into the CWA in its wake. Dewpoints have fallen into the lower 30s across portions of northeast AR and the MO Bootheel. Winds will become light and variable this evening as the surface anticyclone settles over the area. Saturated soils should limit temperatures from getting below freezing tonight, but we do anticipate a fair amount of low to mid 30s overnight, especially in low-lying areas and river valleys across west TN and north MS.
/00Z TAF CYCLE/ VFR and MVFR conditions prevail across the region late this afternoon with KSAT/KSSF having the lower MVFR ceilings with KAUS and KDRT VFR. The cold front is through the entire region to the south with north to northeast winds of 10 to 15 knots prevailing. The MVFR timing for KAUS will be tricky overnight and depend on saturation of return flow back over the shallow cold front.
908 PM EST Tue Mar 7 2017 Showers are expected today with the approach and passage of a cold front.
Overnight low temperatures will range from the low 40s across the northern half of the area, to the mid to upper 40s across the southern half of the area where more cloud cover is expected.
724 PM EST Tue Mar 7 2017 High pressure will continue to push east offshore of the mid-Atlantic coast tonight as a cold front approaches the area. High pressure will continue to weaken tonight as a cold front approaches the area. High pressure builds back into the area behind it through the rest of the week.
Latest satellite imagery and obs upstream do show some holes in the low stratus canopy over eastern Missouri, so we have some reason to see some holes in the clouds this afternoon. Lows should be near freezing.
The timing of the cloud clearing will subsequently impact high temperatures today, and thus have the highest values in the mid to upper 40s (closest to the blended solutions) in the SW CWA and the coolest readings around 40 in the NE. Mostly clear skies are forecast for tonight as H850 ridging becomes more established and continued WAA allows H850 temps to rise from 0C to +7C between 12Z today and 12Z Saturday.
853 AM CST Fri Nov 25 2016 At 8 am CST a warm front extended from low pressure in Alberta southeast through east central North Dakota. This lowered our overnight lows with teens and lower 20s many locations making for a frosty morning. Tonight upper level ridging remains over the forecast area with a weak pressure pattern.
405 AM MST Fri Nov 25 2016 Weak low amplitude ridging will build today over eastern Utah and western Colorado as flow becomes southerly to southwesterly.
Chattanooga Airport, TN 65 37 60 32 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 62 35 55 28 / 0 0 0 0 Oak Ridge, TN 63 35 56 28 / 0 0 0 0 Tri Cities Airport, TN 61 33 50 24 / 20 10 0 0 NC.
The main concern then turns to how long the lower clouds will stick around. The back edge of the stratus currently stretches into western MN and IA, so it's probably going to be a while until this clearing moves through as high pressure pushes in. Should eventually see VFR return as the high comes overhead tomorrow. Mariners should expect westerly winds to persist into tonight and even increase a bit as pressure gradient increases slightly ahead of approaching high pressure ridge. Patchy light rain and snow this morning will transition to light rain and drizzle as a weak atmospheric low pressure ripple moves through with precipitation expected to be over by tonight.
421 AM MST Fri Nov 25 2016 Current surface map places trof across Montana into Wyoming. Water vapor shows upper level ridge building across the northern plains. With upper level ridge across the area today and Saturday, it will be dry and warm.
Below this low to mid level moisture is some patchy dense fog. /issued 449 AM CST Fri Nov 25 2016/ Cold front associated with a weak upper trof moving across the central CONUS just to the n and w of our region this morning. Front will continue to sink swd today as the trof moves ewd. Cold front will bring a shot of cooler/drier air to the region that will keep us near seasonal normals for Saturday.
Primary difference is in the H100-H70 wind fields based on the position of a ridge axis extending from Bermuda acrs the FL Big Bend: prevailing W/SW over the panhandle, bcmg E/SE over the central/south peninsula. These largely have been dissipating as they move out of the Gulf Stream into the cooler shelf waters. Favorable boating conds as a high pres ridge extending from Bermuda to the FL Big Bend generates a light to gentle E/SE breeze acrs the lcl Atlc.
957 AM CST Fri Nov 25 2016 The clearing has progressed to a line from Langdon ND to Fargo ND to east of Breckenridge MN. Upper level ridge over eastern MT will move over the area tonight.
426 AM CST Fri Nov 25 2016 A cold front crossed the Red River early this morning and will push into Central and East Texas by daybreak. While this will usher in cooler and drier surface air to the entire CWA, the postfrontal layer will be rather shallow. Although the sun will emerge along and north of the I-20 corridor, the low-level cold advection will shave several degrees off of high temperatures.
Dry weather will continue with warmer daytime temperatures Friday and Saturday.
went on the lower end of ceilings closer to the MAV MOS guidance. A weak cold front will drift to the south across South Central Texas today. Upper level ridging briefly builds into Texas on Saturday leading to a more stable pattern.
628 AM EST Fri Nov 25 2016 Lots of clouds with possibly very light rain or drizzle behind cold front now off to our east.
This evening, a weak cold front will pass through Deep South Texas and the Rio Grande Valley, causing a further backing of winds but increased cloudiness. Otherwise, isolated showers are forecast for today and through tomorrow as a weak cold front passes through the BRO CWFA.
925 AM EST Fri Nov 25 2016 The weak cold front was analyzed just west and north of our CWA this morning. Low amplitude ridging aloft will be replaced by troughing as a southern stream wave merges in with a northern stream trough, amplifying it over the eastern CONUS.
There will be a break in the wet weather today, with an upper trough bringing more rain and mountain snow late tonight and Saturday.
Have the highest highs today over central SD (into the lower 50s) while some existing snow on the ground over the James Valley and especially east of the Coteau will keep temperatures in the lower 40s. Continued warm air advection aloft will strengthen the low level inversion tonight and lead to another night of fog potential. Will go with temps slightly warmer than Friday, with the warmest temps in central SD.
654 AM EST Fri Nov 25 2016 Weak high pressure to the northeast, will keep a generally easterly flow across South Florida through the TAF period. This low level easterly flow pattern will persist through the rest of today, as high pressure riding slides by to the north. In general, temperatures across the region will max out in the lower 80s, around between 2-4 degrees above normal for this time of year.
There is a subtle short wave trough passing over the Mid- Coast region today and CIRA layered precipitable water image shows higher moisture just to the northeast of this area. Water vapor imagery shows an upper level jet streak moving across northern Mexico into South Texas which may provide some weak lift, and the Mid-Coast region will also be in proximity to slightly better low level moisture convergence ahead of a prefrontal trough. The cold front with the drier air arrives this evening with rain chances shifting to the western areas and diminishing overnight.
Low amplitude ridging aloft will be replaced by troughing as a southern stream wave merges in with a northern stream trough, amplifying it over the eastern CONUS.
COLD FRONT HAS PUSHED THROUGH AREA. /Issued 404 AM CST Fri Nov 25 2016/ A weak cold front is crossing the area from northwest to southeast.
Upper ridge building toward the northern plains with dry and mild weather expected over eastern Montana through the weekend. High clouds will be increasing as the ridge axis moves east and downslope mixing winds should allow for good temperature recovery.
449 AM CST Fri Nov 25 2016 Cold front associated with a weak upper trof moving across the central CONUS just to the n and w of our region this morning. Front will continue to sink swd today as the trof moves ewd. Cold front will bring a shot of cooler/drier air to the region that will keep us near seasonal normals for Saturday.
Widespread rainfall is then forecast from late tonight into Saturday morning as the cold front pushes inland. A cold upper level trough remains off of the Pacific Northwest coast this morning with a frontal boundary pushing across that region and approaching northern California. The cold front is not forecast to make much progress southward through the day with the bulk of precipitation remaining to our north. Light rain may be possible as far south as the northern portions of the North Bay through the day while locations south of the Golden Gate Bridge will remain dry. Widespread rainfall is then expected from late tonight into Saturday morning as the main trough approaches the West Coast and drives the frontal boundary southward and inland across our region.
404 AM CST Fri Nov 25 2016 A weak cold front is crossing the area from northwest to southeast.
932 AM EST Fri Nov 25 2016 Weak high pressure will affect the area today through much of the upcoming weekend. Low pressure will deepen off the coast tonight and move towards southeast Canada Saturday.
522 AM MST Fri Nov 25 2016 Pretty quiet weather pattern through the first half of the weekend with upper level ridging across the region. Temps will warm into the low-to-mid 50s across the plains by this aftn. Soundings through Saturday show a very dry airmass in the low and midlevels, so went trended dewpoints toward the drier CONSMOS guidance.
344 AM MST Fri Nov 25 2016 Pretty quiet weather pattern through the first half of the weekend with upper level ridging across the region. Temps will warm into the low-to-mid 50s across the plains by this aftn. Soundings through Saturday show a very dry airmass in the low and midlevels, so went trended dewpoints toward the drier CONSMOS guidance.
Saturated low level profile across the lowest 4 to 5 kft continues to define conditions locally early this morning. Timing on either side of sunset suggests a narrow window does exist tonight for some wet snowflakes to emerge as freezing levels begin to creep below 1000 ft. Cool deep layer west-northwest flow locked in Saturday, the thermal advective process holding neutral immediately downstream of approaching low and mid level ridging.
609 AM EST Fri Nov 25 2016 Weak high pressure will affect the area today through much of the upcoming weekend. Low pressure will deepen off the coast tonight and move towards southeast Canada Saturday.
642 AM EST Fri Nov 25 2016 A weak frontal boundary in the forecast area will push east of the area tonight as high pressure shifts eastward.
/issued 654 AM EST Fri Nov 25 2016/ Weak high pressure to the northeast, will keep a generally easterly flow across South Florida through the TAF period. This low level easterly flow pattern will persist through the rest of today, as high pressure riding slides by to the north. In general, temperatures across the region will max out in the lower 80s, around between 2-4 degrees above normal for this time of year.
637 AM EST Fri Nov 25 2016 Aviation One area of low pressure over the Great Lake Region will weaken as it drifts east today.
There is a sfc trof about 60 to 80 miles offshore the NE FL coast this morning, which is furnishing sparse showers over offshore waters of NE FL. The upper level ridge axis over the region this morning will shift eastward over the adjacent Atlantic as a front and upper level trof begins working its way through the southeast. Some model guidance hint at sprinkles or very light isolated showers ahead of trough over parts of forecast area. Southerly winds will turn offshore and becoming north to northwest on Saturday as a cold front moves through area waters.
542 AM CST Fri Nov 25 2016 A cold front which just recently pushed through the DFW Metroplex should reach the Waco area around 14Z. /ISSUED 426 AM CST Fri Nov 25 2016/ A cold front crossed the Red River early this morning and will push into Central and East Texas by daybreak. While this will usher in cooler and drier surface air to the entire CWA, the postfrontal layer will be rather shallow. Although the sun will emerge along and north of the I-20 corridor, the low-level cold advection will shave several degrees off of high temperatures.
Winds are backed and weaker over the cooler bay side waters. Short Term Update - High pressure to our northeast will continue to provide moderate to fresh northeast to east flow across the area, with winds remaining backed and weaker over the shallow gulf and bay waters. Sufficient sunshine will get high temperatures to near 80 or the lower 80s. A high pressure system off the Carolina Coast will keep moderate to fresh breezes across Florida Keys Waters. Winds will continue to be significantly weaker on the cooler gulf and bay side waters near the Florida Peninsula.
An upper level trough shifting across the region will provide lift for precipitation tonight into Saturday morning. With nearly all moisture remaining shallow and boundary layer temperatures near freezing, microphysics won't be favorable for any efficient snow production. In fact, cloud top temperatures in the ridges may not be cold enough to allow for ice crystal development, which could result in more freezing drizzle across that area than snow. The mention of patchy freezing drizzle was continued in the forecast, as well as the continued mention in the Hazardous Weather Outlook. As high pressure begins to ease its way into the region Saturday night, the chance for snow will diminish, although a light dusting remains possible.
514 AM EST Fri Nov 25 2016 Lots of clouds with possibly very light rain or drizzle behind cold front now off to our east.