Aikyam-Lab/Synoptic-Bench huggingface dataset:
523 PM MDT MON SEP 26 2016 The upper ridge in place over the northern and central Rockies will move east over the high plains on Tuesday. The cool area of high pressure at the surface moves into the southern high plains overnight with a weak westerly near surface flow across the forecast area. As a result of clear skies and weak west surface winds, expect temperatures to rise into the lower to mid 80s by Tuesday afternoon.
632 PM CDT Mon Sep 26 2016 High pressure will continue to build over the forecast area tonight. Currently we are still near our max highs for the day, and it remains breezy along and east of the Highway 83 corridor. Undercut the 12 UTC guidance consensus for lows tonight given the observed temperature pattern from this morning which came in cooler than than forecast. Thus, in a similar setup with good radiational cooling tonight, widespread lows in the lower to mid 30s are expected for the aforementioned areas.
Have updated the forecast to include patchy advection fog overnight near lakes and rivers, to account for much cooler air moving in over the warm water that has seen little cool down for the past several weeks. Highs will top out in the lower 70s Tues afternoon with lows Tues night in the upper 40s/lower 50s.
Dry high pressure is moving in, but residual ground moisture and light wind will make areas of fog a concern through 13Z at all sites, especially for CSV and CKV.
Outside of the lower cloud decks to the south. /ISSUED 311 PM CDT MON SEP 26 2016/ The Nation's weather is currently being dominated by a large upper low, which can be seen on water vapor imagery spiraling across the Great Lakes region. A tailing upper trough extends southwestward into Central Texas, and currently represents the back edge of our precipitation this afternoon. The slow movement of the 850 front may be at least partially attributed to the presence of a second upper low over Baja California. Meanwhile, the surface cold front which pushed through last night has cleared all counties of the forecast area and will continue to make its way to the upper TX coast tonight. The warmer conditions were either immediately along the Red River where sunshine was occurring or across the southern-most counties closest to the front.
A large closed upper low currently over southwest Ontario will maintain its influence over our weather as it gradually slips south-southeast through the Great Lakes and into the OH Valley. A back-door cold front will then slip southward as the upper low begins its southward journey and another injection of cool/dry air overspreads the region for mid-week. In addition upper level ridging builds northward through the plains. Eventually an upper level trough moving through the west coast will force the upper ridge east of us and allow warm air advection and southwesterly flow aloft to bring a small chance for rain.
1036 PM EDT MON SEP 26 2016 The cold front has pushed east of our forecast area and most showers have exited the area. As a result of more cloud cover, overnight lows will be a few degrees warmer than previously forecasted, and have adjusted accordingly. Clouds will eventually begin to clear late tomorrow morning as the upper trough pushes through the region, ushering colder and drier air into the area. Chattanooga Airport, TN 65 80 53 80 / 40 10 10 10 Knoxville McGhee Tyson Airport, TN 62 76 52 77 / 50 10 10 20 Oak Ridge, TN 62 78 51 77 / 40 10 10 20 Tri Cities Airport, TN 61 74 47 76 / 70 10 10 30.
High pressure that is control this afternoon will move across the forecast district by tonight. These downslope winds will keep lows a bit warmer than compared to last night. With the downsloping, warmer highs are expected - mainly mid 80s.
There is quite a bit of high cloudiness streaming over the region associated with southwestern US upper low. Surface cold front which moved through the area yesterday is now pushing into the mid-Atlantic states/TN valley.
Overnight, lows will dip into the lower 50s. Tuesday through the midweek, boundary layer flow will remain weak, with the increasing narrow 500mb ridge continuing to build across the Plains.
949 PM MST MON SEP 26 2016 A developing low pressure system over northwest Mexico and the Baja Peninsula will slowly move north toward southwest Arizona tonight. Variable cloudiness, cooler temperatures, and a threat of showers and afternoon thunderstorms are forecast.
/issued 617 PM CDT MON SEP 26 2016/ /00Z TAFS/ Precipitation is ending over West Central Texas early this evening in the wake of a cold front that has passed south through the area.
1009 PM EDT Mon Sep 26 2016 Nearly stationary upper level low pressure just north of Lake Superior this afternoon will push and occluded front through the North Country tonight, accompanied by some light rain showers.
Cooler drier air was settling in quickly behind the boundary. Scattered SHRA and isolated TSRA are diminishing in intensity along/ahead of the cold front currently approaching the HBG area.
745 PM EDT MON SEP 26 2016 A cold front is crossing the area tonight though showers and thunderstorms have largely moved east of the area.
1059 PM EDT Mon Sep 26 2016 A cold front with a line of showers will sweep through the region overnight.
This high pressure will track south allowing for generally west winds through tomorrow. With clear skies and diurnal heating, highs today are expected to reach into the lower 70s. Warmer 925mb temps nose in from the west tomorrow providing more of a east/west gradient for temperatures across the area.
High pressure will build into the area for tonight into Tuesday. An upper level low may affect the area later this week. Cloud cover should continue to thin out during the rest of the afternoon as drier air moves into the area, leaving skies mainly clear by tonight as surface ridging noses into the Ohio Valley.
936 PM EDT Mon Sep 26 2016 A weak area of low pressure off the southeast coast will lift northeast tonight and Tuesday. A cold front will pass through from the west Tuesday night.
Will place incoming cold front across central Louisiana, and extending west through east Texas. Will not be seeing a sharp downturn in temperatures/dewpoints with passage of the front, but a more gradual lowering over the next few days as Great Lakes cyclone digs south over the eastern conus while plains ridge amplifies. Winds will trend offshore through the week in the wake of a cold front advancing across the northwest gulf.
510 PM MDT Mon Sep 26 2016 Closed low will remain in place over the great lakes with nw conus troughing ongoing. This will support local ridging with associated waa over the northern plains under dry nw flow. Otherwise, warmer conds expected tue with highs in the 70s and a few 80s. Northerly upper flow will continue through mid week as high pressure remains entrenched over the western CONUS. As the upper ridge shifts east, an upper low off the Pacific Northwest Coast will deepen, transitioning the flow over to the southwest.
With the cold front and associated precipitation southeast of the region, the primary story for the short term portion of the forecast will be an upper-level storm system that will wobble its way southward from the Great Lakes into the Ohio Valley.
A weak cold front will bring clouds and a chance of light rain tonight and Tuesday morning, mostly in the northern areas.
911 PM CDT MON SEP 26 2016 Cooler and drier air continues to filter into the Mid-South this evening. The first significant cold front of the season has finally pushed across the area.
1048 PM EDT MON SEP 26 2016 A cold front is crossing the area tonight though showers and thunderstorms have largely moved east of the area.
/Issued 229 PM CDT MON SEP 26 2016/ Much more pleasant conditions have been seen today across eastern Oklahoma and western Arkansas in the wake of yesterday's cold front, with this trend likely to continue through much of this week.
A little drier air should begin to filter into the lower levels in the northwest though as we already have a dew point of 64 at Haleyville.
758 PM MDT Mon Sep 26 2016 Strong high pressure aloft will bring dry and mild conditions tonight and Tuesday. Developing lee side surface trof will bring a little wind and warmer temps especially near the foothills tonight.
A large upper level low currently centered over Lake Superior will build southward into the eastern United States.
High pressure aloft will provide another day of dry and stable conditions. High pressure aloft will continue to provide dry and stable conditions.
740 PM EDT MON SEP 26 2016 A cold front currently stretches from the eastern Great Lakes back through NW Georgia to the Mississippi coast. The models have slowed down the southward progression of the cold front with successive runs. Cooler and slightly drier air is expected on the back side of the front tomorrow. Temps along the Interstate 20 corridor have the potential to be warmer than forecast for tomorrow, especially if the front stalls to the north. Still enough lift generated by perturbations in the overall upper trough to warrant continued low pops for the extreme southern tier. Front clears the entire area by Wed afternoon as East Coast upper trough continues to deepen.
1131 PM CDT MON SEP 26 2016 High pressure in control both at the surface and aloft will keep the weather quiet the next 24 HRS. Good drainage wind expected in favored areas such as the Platte River valley and have gone with the lower guidance for lows in most areas. A surge of warmer air will move east off the Rockies Tuesday. This warmer air will be aided by a downslope flow component, and have highs reaching the upper 70s to mid 80s across the region.
Building high pressure will bring dry conditions with a warming trend into the middle portion of the week. High pressure remains centered over northern Utah and southern Idaho this evening keeping dry and stable conditions in place through the night. However, a closed low over Baja California will slowly lift north, and clouds along the northern periphery will approach southern Utah by morning.
Dry high pressure will be moving into Mid TN during the next 24 hours.
Surface analysis this evening shows the location of the cold front pushing through NE AL at the moment and should clear the region very shortly. Otherwise, forecast is on track and we'll continue to welcome cooler temps.
00Z TAF Surface analysis has cold front basically through KLFK/KCXO/K11R with low CIGS and north winds behind it. Cold front is expected to push to the coast through the night and early morning hours. A cold front will push through SE Texas overnight tonight, bringing much more pleasant temperatures and lower humidity into the forecast for the rest of the period.
900 PM PDT MON SEP 26 2016 An upper level ridge will remain in place through Tuesday, which will keep above normal temperatures across the region. A cool down is expected as an upper level trough moves into northern California for the rest of the week and into the weekend.
Latest sfc analysis showing that the cold front is just west of the Plateau. At any rate, its much cooler today with current temps in the upper 60s northwest to 70s elsewhere. Sfc ridging will take over on Tuesday and we will see a mostly sunny day with lower humidity levels.
530 PM MDT MON SEP 26 2016 A warming trend will continue over the next few days as upper-level ridging continues to build into the region.
/Issued 740 PM EDT MON SEP 26 2016/ A cold front currently stretches from the eastern Great Lakes back through NW Georgia to the Mississippi coast. The models have slowed down the southward progression of the cold front with successive runs. Cooler and slightly drier air is expected on the back side of the front tomorrow. Temps along the Interstate 20 corridor have the potential to be warmer than forecast for tomorrow, especially if the front stalls to the north. Still enough lift generated by perturbations in the overall upper trough to warrant continued low pops for the extreme southern tier. Front clears the entire area by Wed afternoon as East Coast upper trough continues to deepen.
(Issued 313 PM CDT Mon Sep 26 2016) Latest water vapor imagery shows a upper level low over the northern Great Lakes region, with upper level ridging over much of the western CONUS. At the surface, a cold front extended from the parent low over the Great Lakes, southwestward into the lower MS Valley. The main cold front has reach through the western half of the CWA, though lingering post frontal showers were noted with the main trough axis over portions of western TN and northern MS.
Looking for a mostly quiet rest of the evening and overnight with lowest rain chances (very very low) north and highest rain chances (low) closer to the coast and offshore as a cold front works its way southward across the area (College Station's 9 PM dew point at 67 degrees!). 00Z TAF Surface analysis has cold front basically through KLFK/KCXO/K11R with low CIGS and north winds behind it. Cold front is expected to push to the coast through the night and early morning hours. A cold front will push through SE Texas overnight tonight, bringing much more pleasant temperatures and lower humidity into the forecast for the rest of the period.
/issued 911 PM CDT MON SEP 26 2016/ Cooler and drier air continues to filter into the Mid-South this evening. The first significant cold front of the season has finally pushed across the area.
A push of cooler and drier air is expected to filter into S TX through the evening hours resulting in a slightly stronger N wind and CIGs lowering to around 1500FT. Water vapor imagery shows the upper level low near central Baja California nearly stationary while a weak mid level short wave trough was moving into the western Hill Country. Scattered showers and isolated thunderstorms will persist into the evening hours as the secondary cold front, near a LaGrange to Pleasanton to Eagle Pass line this afternoon, moves through the area later tonight. Weak upper level ridge will be over the region on Tuesday.
714 PM EDT MON SEP 26 2016 The cold front and accompanying showers/thunderstorms have pushed east of all TAF sites. Low clouds will mix out later tomorrow morning as the base of the upper level trough moves through the forecast area and VFR conditions will return for tomorrow afternoon.
617 PM CDT MON SEP 26 2016 /00Z TAFS/ Precipitation is ending over West Central Texas early this evening in the wake of a cold front that has passed south through the area.
Dry high pressure will maintain VFR at all terminals. Today will be a carbon copy of yesterday with aftn temps back into the lower 80s.
Low temperatures tonight will be in the 60s at most locations, expect for the low 70s near the coast.
The majority of the short term period will be dry as the region will be situated between high pressure to the east and low pressure to the west.
1101 AM EDT Sat Oct 1 2016 Little change over the weekend with high pressure to the northeast and low pressure over the Ohio Valley.
Highs today will be about 5 degrees warmer than yesterday, and with increased sunshine. Synoptically, an upper trough will remain across the Pacific Northwest today, as a closed low rotates slowly northward toward the southern Great Lakes. An upper ridge extends north across central into eastern Canada. A transitory upper level ridge will extend across the Central Conus. A upper level ridge will be entering the final breakdown phase across the Central Plains as a trough digs into the Pac Northwest. Temperatures will respond by warming into the upper 70s to the lower to mid 80s across the cwa. As the trough draws near. the sfc lee trough will further deepen and strengthen the pressure gradient.
1034 AM MDT SAT OCT 1 2016 Blocky pattern setting up with upper lows along the west coast and across the eastern U. Building ridge in between with axis setting up east of our forecast area. Still enough moisture lingering to kick off a few showers and thunderstorms, with activity favoring the higher elevations. With light steering winds, potential for valley convection will be diminished as storms will likely dissipate as they try to come off the higher terrain.
331 PM EDT Sat Oct 1 2016 Another beautiful day across the CWA! WV loop showing the persistent closed upper trough centered across northern IN/southern MI and migrating slowly north while a more potent trough is developing in the Pacific northwest and creating a downstream ridge across the Rockies. weak sfc ridging. Low temps will be slightly warmer than last night as CAA has finally subsided in the wake of last sfc frontal system. Temps will continue to rebound with highs in the lower 80s N to upper 80s S.
and that probably helped keep min temps a few degrees warmer. Cut off upper low near IN/OH border continues to spin and move little. upper storm system off the WA coast will eventually move onshore by Sunday which will amplify the upper ridge that is currently over our area.
Weak pressure gradient across the region with high pressure overhead has allowed for decent radiational cooling conditions to occur. The only fly in the ointment is the amount of thick cirrus spilling over the top of the ridge across much of Texas helping to keep a blanket on us and slowing down the nocturnal cooling. With the lighter winds dewpoints are couple degrees warmer than 24 hours ago, but still below where we have been so still a win.
All model guidance still indicates this push will run out of steam a little west of Interstate 29, further away from the large upper low to the southeast. However, the low clouds look to hold their own much of the day with some breaks. Guidance very slowly but steadily decreases the low cloud deck tonight, and this makes sense given the upper low starts to slowly weaken and recede, with the flow of deep moisture also slowly decreasing.
259 PM CDT SAT OCT 1 2016 Upper low continues to churn over the upper Midwest region, which continues to keep our upper flow pattern nwly. Upper ridge to our sw has brought us a good deal of mid and high lvl clouds today, but drier air over W TX will work its way ewd overnight leaving us under partly cloudy skies. One more weak reinforcing shot of cooler air looks to come early Sunday, which will allow for one more night in the 50s before we warm up ahead of our late-week cold front. Low level flow will increase by midweek, as the upper trof currently over the Pac NW moves into the plains. Ewd progression of the trof looks to be slow through the work week, as models have trended slower with each run.
After Sunday, the Low moves to Lake Eerie and beyond, so the ridging in the Plains starts to work into the mid Mississippi valley with a bit more strength, as the low pressure trof is drug on across the Commonwealth.
805 AM EDT Sat Oct 1 2016 Upper level low pressure will produce a few showers across the region this afternoon, with a slightly better chance for showers Sunday. Closed low near KCVG will slowly wobble north through tonight with drier air wrapping into the system. Still expect scattered to isolated showers to develop in weak bands as spokes of energy wind around the low. The upper low will continue to migrate northeastward tonight allowing for deeper layer southwesterly flow to become established. Slow moving low will accelerate eastward Sunday, with the center of the low passing near Lake Erie.
327 PM EDT Sat Oct 1 2016 Low pressure near Cape Cod will track to the northeast tonight while high pressure remains parked over western Maine.
The upper low that brought low clouds and fog to the area yesterday morning is shift northward this morning. This has lead to less cloud cover over northern Alabama and Southern Middle Tennessee this morning and a warmer start to the day. However, there is a trough axis rotating through western Tennessee associated with the upper low. Cullman county may make it into the lower 80s.
As the upper ridge axis moves into far eastern Colorado overnight the better moisture slowly moves east bringing a decrease in silent pops from west to east. upper ridge axis over the area during the day slowly moving east overnight as low pressure and associated trough dives southeast toward Nevada putting the area in southwest flow aloft. High temperatures warm another few degrees into the low to mid 80s. Low temperatures in the low to upper 50s.
With sfc ridging remaining anchored over the region through the TAF period. We were expecting to get back above average today as the refreshing air mass has certainly modified a good bit over the last couple of days, but these increasing clouds will make for persistence with yesterday's effort in the low 80s for most of us. The water vapor is showing the upper low still over IN/OH for the overnight, but it is lifting slowly North at least over the last couple of days. A cloudy shallow ridge is sliding over Mexico and Texas this morning and will be spreading some mid and abundant high clouds East of the MS river by late today. The next big trough is digging down the BC and NW US coast this morning and will deepen over the Western US over the weekend.
258 PM CDT SAT OCT 1 2016 Upper low finally lifting out to the north northeast, in northern Indiana as of 19z. However, models showing a weak trof/cold front to slide through forecast area on backside of system.
At the surface, high pressure is in control across Central Alabama once again this AM. A little lingering wrap around stratus could be possible early on, but coverage should be less as the low pulls away. Could see some weak disturbances filter through the base of the trough tonight.
1247 PM CDT SAT OCT 1 2016 High clouds have prevented fog development across southeast Kansas for early this morning and latest satellite imagery keeps the high clouds in place. The very pleasant weather conditions will continue for this weekend across Kansas with near normal highs today and a bit warmer on Sunday.
High pressure will again build in on Sunday while low pressure digs into the western CONUS.
It has been a rather pleasant start to October this morning as temperatures continue to be in the lower to some mid 70s across the region. Temperatures are running around 2 to 5 degrees warmer than this time yesterday, which will eventually allow us to top out in the lower to mid 80s. The large upper low that has been a factor in our cooler weather pattern will begin to lift north and east out of the general vicinity today but weak troughing will linger across the region.
257 PM CDT SAT OCT 1 2016 Vertically stacked low pressure over Indiana this morning will lift northeast through the eastern Great Lakes by Sunday afternoon. The region should see a gradual decrease in moisture through the period as the low to the east moves away from the region. For for Sunday, highs should be about a category warmer than today.
A few light rain showers are possible a bit closer to the upper low across our far eastern zones, but do not anticipate much coverage or more than a few hundredths of an inch of accumulation.
1202 PM CDT Sat Oct 1 2016 Wobbling, cutoff upper level low over the ohio river valley will meander north today, finally getting a kick east late tonight/sunday as a trough drives into the west coast. Bits of upper level energy will ripple around the low, and with ample moisture to tap into, continue to trigger areas of light rain thru the day - mostly from around the Mississippi river eastward. Upper level trough slated to work from the west coast Sunday morning to across the Northern Plains Wed night, gradually showing a weakening trend as it then lifts northeast into southern Canada thu/fri. A sfc cold front will lead the system into the region Tue night/wed. Ample forcing/moisture to fire up some showers/storms along and ahead of the boundary, with the GFS/EC favoring overnight Tue/Wed night with the higher chances.
Many of the high resolution short range models have some lowered visibilities over the southeastern counties for at least a portion of the night.