Aikyam-Lab/Synoptic-Bench huggingface dataset:
1232 AM CST Mon Nov 14 2016 The theme of cloudless cold fronts this November continues today, with a front at 3pm from southwest MN into the Arrowhead that is so starved from moisture, it isn't even able to produce cloud cover. Though this first cold front lacks much cold air or cloud cover, there is a second one dropping south across Canada this afternoon that bears a slightly different story.
Mid level ridging will strengthen overhead through early week maintaining unseasonably warm/dry conditions locally. A progressive trough will bring a marked change to the area for the latter half of the week. With the GFS showing this high RH band moving east of most of the CWA other then the northeast quadrant of CWA have gone with less clouds over much of the southern and western portions of the CWA for overnight.
127 AM EST Mon Nov 14 2016 An upper level low will cross the Carolinas overnight and Monday, while an area of low pressure moves up the Carolina coast.
Temps to quickly rise into the lower to mid 70s this aftn with commenced south winds at sfc and limited cloud cover aside from aftn cumulus.
242 AM CST Mon Nov 14 2016 (Today and Tonight) A weak cold front will move south into the northern Big Country early this morning, reaching the I-20 corridor around noon. By late afternoon the cold front will be through the I-10 corridor. Despite the cold frontal passage, afternoon highs will still warm above seasonal norms with lower 70s for the Big Country and mid to upper 70s for the remainder of the forecast area.
227 AM MST Mon Nov 14 2016 Flat upper ridge expected across the nrn plains early this week with a series of trofs tracking along the US/Cndn border. Today will likely be the warmest day with downslope flow ahead of a sfc trof pushing temps well into the 60s most areas, possibly near 70 south/east of the Blkhls.
1216 AM EST Mon Nov 14 2016 High pressure will remain to our south overnight and Monday then move away to the east Monday night.
318 AM CST Mon Nov 14 2016 At H5 strong gulf of Alaska closed low that will be weather maker for northern and central plains late week. There is a ridge over the west dampened by the gulf of Alaska low. There is a trough exiting the northern plains moving towards the Great Lakes and another trough through the Mississippi Valley into the southeast CONUS. Cold front that moved through western Nebraska yesterday is south into the Texas panhandle. Cooler air will filter south into western Nebraska through the day. The upper ridge will push east with western Nebraska in fast northwest flow.
246 AM EST Mon Nov 14 2016 High pressure weakens today.
320 AM CST Mon Nov 14 2016 Will start the day with an upper ridge over CA with a trough over the Southeast. This ridge will build eastward across the area resulting in warm and dry conditions this week.
/issued 245 PM CST Sun Nov 13 2016/ WV imagery shows the exiting upper trough now over NE OK/SE KS, leaving West Texas and Southeast New Mexico under dry, NW flow aloft. Subsidence on the back side of the trough has allowed skies to finally clear out, allowing afternoon temps to climb to above- normal in SW sfc flow. NW flow aloft will transition to meridional over the next couple of days, w/a weak trough/front moving thru the area late tonight and Monday.
Elongated surface ridging centered from Texas to Virginia this AM is expected to continue today but weaken as we head into tonight ahead of an approaching surface front.
Pressure gradient will meanwhile relax as the low settles in, allowing for lighter winds today. These are slightly cooler than yesterday with cooler air filtering in below 850mb and more limited mixing expected. An increase in clouds and lower-level moisture tonight should hold min temps in the upper 30s to low 40s, slightly warmer than this morning.
336 AM CST Mon Nov 14 2016 Trough axis both at the sfc and aloft traversing the Midwest today.
Areas of fog still possible ahead of a cold front that will pass over region late tonight and early Monday morning. Fog expected ahead of a cold front that will pass over region late tonight/early Monday morning. Guidance indicates the highest probability for IFR/LIFR fog will be over southwest Oklahoma in the 10-13Z time frame.
950 PM MST Sun Nov 13 2016 Weak transitional ridging sets up over the area for the short term period, keeping our weather warm and dry with mostly sunny to partly cloudy skies.
418 AM EST Mon Nov 14 2016 An upper level low will lift northeast across the Carolinas today, while an area of low pressure moves up the Carolina coast.
1228 AM EST Mon Nov 14 2016 High pressure will maintain dry weather ahead of a mid week front.
1116 PM CST Sun Nov 13 2016 Our amazing streak of late fall weather continues out the window currently, with nearly full sunshine beneath upper level ridging and temperatures responding nicely thanks to decent mixing to around 900mb up into the 50s and lower 60s.
212 AM CST Mon Nov 14 2016 A subtle cold front continues to slowly progress southward across the OK panhandle early this morning. Ahead of it, dewpoints in the low 50s across the SW quarter of OK could result in some patchy fog by sunrise. Rapid warming is still anticipated Tue-Thu as thicknesses increase with the mid to upper ridge sliding eastward. This ridge axis will shift directly over Southern Plains by Wed and SSW low level flow will begin to increase as a lee low deepens over E CO. Breezy to windy conditions will also develop as the mid to upper low approaches Wed-Thu. This could change especially if the GFS is closer with regards to its slower progression of the upper low.
1250 AM EST Mon Nov 14 2016 High pressure will result in another night with clear skies and cool temperatures by morning.
229 AM EST Mon Nov 14 2016 Low pressure will lift northeast of the area today.
106 AM EST Mon Nov 14 2016 High pressure weakens today.
There are very large differences between the NAM guidance (drier and colder) and the GFS (wetter and warmer). For temperatures, have gone with a bias-corrected consensus, which does put the highs and lows mostly in-between the two solutions. At this time, only expecting light snow in the central Idaho mountains, from near zero to around 6 inches in the highest elevations.
925 PM PDT Tue Mar 21 2017 Low pressure will move through the region through Wednesday night and bring precipitation at times.
1153 PM EDT Tue Mar 21 2017 Cold front will sweep through tonight, bringing much colder temperatures on Wednesday. Increased winds and cold air advection overnight as a cold front dives south across the forecast area. Continued strong cold advection will result in temperatures 10-15 degrees below normal today as high pressure builds overhead.
A weak cold front will turn winds at KABI which are currently southerly to the northeast for a few hours after 12Z. /issued 356 PM CDT Tue Mar 21 2017/ (Tonight and Wednesday) A cold front will move into the Big Country late this afternoon or early this evening, while a dry line approaches our western counties. Heating this afternoon may be enough to break the cap, allowing for the development of isolated showers and thunderstorms along the dryline and cold front.
An upper level trough currently located off the California coast will dive southward and emerge from the 4-corners region as a tightly wound upper level low. A slow moving low pressure system will track eastward with this wave, and widespread showers and thunderstorms will develop along the warm front and in the warm sector. Looking ahead, another trough will follow quickly on its heels, but this is in a split flow regime so continued with the blended guidance for pops and temperatures. Few concerns this TAF period as high pressure slides from near Winnipeg down into the Great Lakes.
923 PM MST Tue Mar 21 2017 A strong low pressure system moving through late Wednesday into Wednesday night will bring a good chance for mainly light rainfall as well as significantly cooler temperatures. Isolated thunderstorms are possible mainly west of Phoenix Wednesday afternoon as a cold front moves across the area. A very broad upper level trough is slowly making its way onshore this evening and is apparent on satellite imagery. This trough which brought rain and thunderstorms to Northern California today will slowly move into our CWA tomorrow. However, at this point, it is only bringing a few high clouds to our area and some slightly cooler temperatures which were observed this afternoon/evening. A slightly stronger SW surface flow is evident this evening and is associated with an increased surface pressure gradient due to the incoming trough.
Weakening southerlies should allow the lower levels to saturate back up.
933 PM PDT Tue Mar 21 2017 A series of weather systems will bring cooler and more unsettled weather to the region this week. The trough of low pressure remains off the west coast but will move closer to coast overnight. Another line of moderate precipitation looks to move through early Wednesday morning as upper level trough moves overhead.
1245 AM EDT Wed Mar 22 2017 High pressure to the northwest continues to nudge in with dry weather expected into tonight. Temperatures will feel cooler tonight as they drop towards 20 degrees.
725 PM EDT Tue Mar 21 2017 A strong cold front will sweep through tonight, bringing much colder temperatures on Wednesday. Temperatures in the highest elevations are already in the upper 30's so a changeover to snow may be possible a bit faster than forecast, but should generally not amount to much as subsidence really limits time for any efficient snowfall. Strong cold advection should support temperatures about 10-15 degrees below seasonal averages Wednesday as high pressure builds overhead.
723 PM EDT Tue Mar 21 2017 A cold front approaching from the north will slowly cross the forecast area overnight. Very warm temperatures this afternoon will be followed by cooler temperatures behind the front. The high-resolution models have trended slower with the timing. The cold front will be moving south of the area Wednesday morning with high pressure centered over the western Great Lakes region building in behind it.
A cold front will edge into HOB/MAF this evening with only an easterly wind less than 10kts. /issued 231 PM CDT Tue Mar 21 2017/ An upper level ridge is over the southcentral part of the country with northeast flow over the area. An upper level trough is beginning to move over the West Coast with an upper trough impacting the Great Lakes area. Temperatures today will be well above normal with highs expected to be a little warmer than yesterday. There is a chance of afternoon thunderstorms across the higher terrain and surrounding area. A cold front will push into the northern areas of the CWA this evening. Upper ridging will continue over the region on Wednesday but temperatures are expected to be a little cooler, especially across the northern CWA.
The 8 pm regional surface analysis showed a surface cold front, which has probably merged with a large outflow boundary from a MCS over northern GA and eastern TN, extending from near Atlanta through eastern OK.
/issued 1012 PM CDT Tue Mar 21 2017/ A cold front has pushed through the Mid-South this evening. Tomorrow we will be situated on the far eastern edge of a broad ridge centered over the plains and on the Southern edge of high pressure centered over the Great Lakes.
747 PM EDT Tue Mar 21 2017 An arctic cold front will drop south across the area this evening and overnight. High pressure will move southeast from the Canadian Plains across the area Wednesday night.
Showers will remain across the area through Wednesday evening, with a lull in activity expected during the overnight hours of the lower elevations.
Surface wise, an elongated, east-west oriented ridge axis is draped across south central Florida and the adjacent Atlantic and Gulf waters. Deep layered ridging expanding eastward and across the Florida peninsula will limit moisture and preclude any shower activity.
958 PM EDT Tue Mar 21 2017 A cold front crosses tonight.
VFR expected through the next 24 hours as showers and storms with a cold front move south of the area.
1236 AM EDT Wed Mar 22 2017 Cold front will sweep through tonight, bringing much colder temperatures on Wednesday. Increased winds and cold air advection overnight as a cold front dives south across the forecast area. Continued strong cold advection will result in temperatures 10-15 degrees below normal today as high pressure builds overhead.
Chattanooga Airport, TN 52 64 43 58 / 80 10 10 20 Knoxville McGhee Tyson Airport, TN 46 59 39 57 / 70 0 10 10 Oak Ridge, TN 45 59 40 60 / 70 0 10 10 Tri Cities Airport, TN 41 56 30 58 / 30 0 10 10.
722 PM EDT Tue Mar 21 2017 High pressure to the northwest continues to nudge in with dry weather expected into tonight. Temperatures will feel cooler tonight as they drop towards 20 degrees.
745 PM EDT Tue Mar 21 2017 A cold front crosses tonight.
918 PM CDT Tue Mar 21 2017 Temperatures are falling a bit more slowly than previously though behind the slowly-moving cold front.
908 PM CDT Tue Mar 21 2017 Showers and thunderstorms have cleared the area with temps quickly falling into the upper 50s to lower 60s in response to the passing cold front. This seems to be a reinforcing cold front as dew points are dropping 10-15 degrees behind it as well as a wind shift from the NW to the NE.
/issued 356 PM CDT Tue Mar 21 2017/ (Tonight and Wednesday) A cold front will move into the Big Country late this afternoon or early this evening, while a dry line approaches our western counties. Heating this afternoon may be enough to break the cap, allowing for the development of isolated showers and thunderstorms along the dryline and cold front.
624 PM CDT Tue Mar 21 2017 High pressure continues to build into the Midwest, but a persistent slow wave of light precipitation with the mid level winds. A lack of cloud cover throughout most of the night will assist in providing effective radiational cooling and temperatures will drop below the freezing mark. with clouds slowly moving into the region later in the afternoon as a quick wave rounds over the mid level ridge to the west and dives into the mid Mississippi Valley. Northeasterly winds, however, will keep the temperatures cooler tomorrow. A progressive upper level pattern will be in store for the Midwest the next few days resulting in a return to warmer temperatures.
(previous) High pressure ridge over the southern CWA will slip southward and weaken ahead of increasing westerly pre-frontal flow ahead of a weak back door frontal boundary, which the models continue to accelerate faster toward/into the northern CWA compared to previous runs.
846 PM CDT Tue Mar 21 2017 The cold front continues to move through central Arkansas this evening.
1012 PM CDT Tue Mar 21 2017 A cold front has pushed through the Mid-South this evening. Tomorrow we will be situated on the far eastern edge of a broad ridge centered over the plains and on the Southern edge of high pressure centered over the Great Lakes.
929 PM EDT Tue Mar 21 2017 Cold front will sweep through tonight, bringing much colder temperatures on Wednesday. Temperatures in the highest elevations are already in the upper 30's so a changeover to snow may be possible a bit faster than forecast, but should generally not amount to much as subsidence really limits time for any efficient snowfall. Strong cold advection should support temperatures about 10-15 degrees below seasonal averages Wednesday as high pressure builds overhead.
A cold front has now worked its way thru all of the TAF sites. /Issued 924 PM CDT Tue Mar 21 2017/ Cold front now extends near Fort Smith west to Webbers Falls/Eufaula per latest mesonet obs.
749 PM EDT Tue Mar 21 2017 Aviation A large area of high pressure over northern Minnesota will build southeast into Lower Michigan tonight and Wednesday.
MSN should be far enough west to avoid most cloud cover once the high clouds move out. Not going too crazy with low temperatures this tonight despite the strong CAA and mostly clear skies because winds will remain elevated through the night, allowing some warmer temps to mix down. High pressure builds in tomorrow, resulting in cool, sunny conditions.
924 PM CDT Tue Mar 21 2017 Cold front now extends near Fort Smith west to Webbers Falls/Eufaula per latest mesonet obs.
945 PM EDT Tue Mar 21 2017 An arctic cold front will drop south across the area this evening and overnight. High pressure will move southeast from the Canadian Plains across the area Wednesday night.
An H300 ridge axis will currently over the eastern Rockies will amply and shift into the Central Plains by Wednesday afternoon.
1233 AM EDT Wed Mar 22 2017 Showers and thunderstorms will continue through the early morning hours as a cold front moves through the area.
859 PM PDT Tue Mar 21 2017 Cooler than normal temperatures and unsettled conditions will prevail through Wednesday.
An upper level trough currently located off the California coast will dive southward and emerge from the 4-corners region as a tightly wound upper level low. A slow moving low pressure system will track eastward with this wave, and widespread showers and thunderstorms will develop along the warm front and in the warm sector. Looking ahead, another trough will follow quickly on its heels, but this is in a split flow regime so continued with the blended guidance for pops and temperatures. No changes for the 06z TAFs, with dry high pressure keeping skies clear tonight.
816 PM EDT Tue Mar 21 2017 An arctic cold front will push across the region tonight with scattered snow showers, though only minor accumulations are expected.
1010 PM MDT Tue Mar 21 2017 Widespread dense freezing fog and freezing drizzle is ending across the area and visibilities continue to increase. Therefore have cancelled the Freezing Fog Advisory that was in effect. At least through this evening, expect upslope fog mixed with drizzle or freezing drizzle (depending on ground temperatures) to continue, especially on the SD plains and eastern slopes of the Black Hills. This will cause gusty winds over northeast WY and the higher Black Hills as well as the frontal boundary to move northeast as a warm front. Wednesday, upper ridge builds into the CWA with much warmer temperatures and precipitation ending early. Wednesday night, upper low pulls into the southwest US with impulse laden southwest flow across the CWA which will support a chance of mainly rain, possibly mixed with snow over the higher elevations.
A cold front is making its way south across the region this afternoon. /Issued 313 PM CDT Tue Mar 21 2017/ The cold front snaked from far northwest AR-northeast OK-southwest OK this afternoon. Widespread clouds will keep Wednesday temps much cooler than what we've experienced the past few days.
Wind will however become gusty behind passing cold front.
341 PM EST Sat Feb 11 2017 High pressure will prevail through Sunday.
246 PM EST Sat Feb 11 2017 Low pressure and a warm front will approach the region from the southwest today. For tonight, the low will track east through the region, bringing rain. As the low exits to the east on Sunday, its associated cold front will sweep through the area. Colder air will filter into the region as high pressure builds into the Ohio Valley for the beginning of the work week. As the low approaches the area this evening into Sunday morning isentropic upglide will continue with condensation pressure deficits approaching zero. Models are in fairly good agreement with pushing the cold front through the CWA by early Sunday afternoon. The 850 mb cold front will then quickly follow behind with strong CAA.
The low clouds have developed further west towards Manhattan and Abilene and have likewise pushed temps down a few degrees in these areas. Southerly flow ahead of the low pressure is causing moist air from the gulf to spread northward. The low pressure is forecasted to move eastward today across southern KS. Moisture may linger in the form of low clouds around I-70 this afternoon although cold air advection behind the departing low pressure may reinforce the stratus across the area especially in the evening. Lingering stratus into the afternoon would cause cooler temperatures in those locations therefore have tried to account for that in the forecast. Sunday starts out breezy as cooler high pressure continues to push southward over the state. High temps in the 40s are followed by a cooler overnight with lows back down into the 20s.
However, staying with the higher rain chances as we should see fairly widespread drizzle, expecially during the overnight hours.
340 PM CST Sat Feb 11 2017 At the surface, high pressure is centered off the Atlantic Coast, ridging westward into the eastern Gulf of Mexico. Low pressure is centered just south of Kansas City, with a cold front extending westward into the southern Rockies. Dew points are in the low to mid 60s across much of the area. Cold front associated with the Missouri low pressure system will move through the area Sunday night.
These numbers will likely be the highs for the day, with overnight lows similar to last night in the mid-upper 50s interior/Gulf coast and mid-upper 60s for the east coast. Conditions look a little more favorable for more widespread fog Sunday night as the ridge axis drops south and the region comes under light SW flow.
Another round of showers are expected on Sunday as a cold front approaches the region from the west. To start the period we have a cold front moving through the area, which should be east of us shortly after the period begins. Flow quickly shifts to northwest behind front and breezy winds can be expected across the higher elevations, along with cooler and much drier air moving in.
101 PM EST Sat Feb 11 2017 High pressure will build across the region through the weekend.
Temperatures will be cooler today than in the past few days owing to the passage of a cold front yesterday. Colder and drier today through Sunday under northwest flow aloft behind exiting upper trough. Temperature inversion will form in the Lower Treasure Valley with Sunday's highs about 3 degs lower than today.
Cooler but Still Relatively Mild the Next Few Days. A cold front will push across the region tonight bringing an end to the record breaking warmth. A high amplitude pattern will evolve the next few days as an upper level ridge builds over the western U. and a series of upper level troughs dig into the northeastern U. An upper low will become cutoff across the southern High Plains before eventually shearing out.
1122 AM CST Sat Feb 11 2017 Cooler air will continue to advect across the local area today with 850 mb temps dropping around 10C lower across the region than yesterday. but cooler day. As this cooler airmass then makes its way across the local area late in the day. Cooler air will then continue to infiltrate the local area late tonight into Sunday. While expecting dry conditions through the end of the weekend, that disturbance to the northeast does push a cold front south through the region, dropping highs for Sunday back into the mid 40s (still above normal for this time of year).
Upper level high pressure centered to the SW of TX is gradually shifting east and weakening, while a potent upper low approaches Baja California. An embedded short wave is progged to move across S TX around the NW periphery of the high pressure. A cold front is progged to move across South Central TX Sunday and approach the northern tier of the CWA before stalling. The bdry will bring slightly cooler temps to the northern CWA Sunday and Sunday night.
300 PM CST Sat Feb 11 2017 Early afternoon water vapor imagery indicated a progressive positively-tilted trough over eastern MT. This cold front will track southeast through the CWA overnight with winds increasing from the northwest.
Upper trof currently over Ca will advance toward west Tx.