Aikyam-Lab/Synoptic-Bench huggingface dataset:
Upper low pressure over the Pacific Ocean will move northeast into Baja California overnight. This upper low then moves into western Arizona Thursday night. The upper low pressure in the southwest U. A dry cold front will move through Arkansas tonight. bringing cooler temperatures for Thursday.
513 AM CST Wed Dec 21 2016 After some patchy morning fog today, temperatures will rise some but remain near normal for this time of year ahead of a cold front. This cold front does not have much if any moisture with it so no precipitation is expected. While this cold front will bring temperature down it will not be anywhere near as powerful as the arctic blast that came through this past weekend. Weak ridging will come in behind this front which will keep the skies clear for the most part and keep temperatures near normal.
1027 AM EST Wed Dec 21 2016 Low pressure will pass well north of the area today. Low pressure will move across Southern Canada today passing well to the north of the region. A cold front will move across the state tonight with more snow showers in the west and north. Weak low pressure will approach from the west late tonight.
410 AM CST Wed Dec 21 2016 A cold front will move south across Oklahoma and north Texas later today and tonight, blunting the warming trend.
Freezing Fog Advisory until 9 AM CST this morning FOR Bedford- Cannon-Cheatham-Clay-Coffee-Cumberland-Davidson-De Kalb-Dickson- Fentress-Giles-Grundy-Hickman-Houston-Humphreys-Jackson-Lawrence- Lewis-Macon-Marshall-Maury-Montgomery-Overton-Perry-Pickett- Putnam-Robertson-Rutherford-Smith-Stewart-Sumner-Trousdale-Van Buren-Warren-Wayne-White-Williamson-Wilson.
Tonight, the approach of a weak cold front will produce light and variable winds, which should allow for the development of fog. /issued 346 AM CST Wed Dec 21 2016/ SHORT TERM (Today through Thursday): The main event in the short term portion of the forecast will be the gradual passage of a weak cold front through Deep South Texas and the Rio Grande Valley Thursday. No temperature extremes are anticipated during the short term forecast period, aided by significant cloud cover and the passage of the cold front.
955 AM EST Wed Dec 21 2016 High pressure will be centered near the forecast area today and tonight. A weak and dry cold front will move through the area late Thursday.
648 AM EST Wed Dec 21 2016 High pressure will extend across the Southeastern U. ahead of a moisture-starved cold front that will cross our region Thursday afternoon and evening. An upper level disturbance now moving away from the Middle Atlantic coast has finally kicked Ewd the low level frontal zone that had been stalled in the vicinity of the Southeast U. Lows generally in the lower to middle 30s, shy of optimal radiational cooling values, given both the potential uptick in clouds, and occasional stirring. The models have slowed by a few hours with the moisture-starved cold frontal passage Thu afternoon, and evening in the SE. On the heels of the dry cold front on Thursday, high pressure with pacific origins will settle over the area, resulting in near normal highs.
545 AM EST Wed Dec 21 2016 High pressure over the central Appalachians will move offshore today and tonight, making way for a cold frontal passage on Thursday.
Clear and cool today behind yesterday's cold front, with high temperatures about 10-15 degrees below normal.
Mid level ridge weakens across the region allowing this front to move across S Fl. As the front moves closer to S FL, ne winds will prevail Thursday bringing cooler air advection into the region.
Gilchrist Previous discussion: Low pressure has moved into North Dakota early this morning. Tight surface gradient behind the low has brought strong west winds to Northeast Montana with gust as high as 68 mph overnight. The low will continue to move to the east this morning and surface gradient will relax allowing the winds to diminish. Upper level ridge moves into the forecast area tonight and remains over the area on Thursday with mostly clear skies. Although, the atmosphere warms aloft, light winds, low level inversions, and snow cover will limit how much of the warmer air that mixes to the surface.
VFR conditions will continue at all sites with a weak cold front bringing a wind shift across terminals today. /Issued 411 AM CST Wed Dec 21 2016/ A dry cold front is making its way across western Nebraska and eastern Colorado early this morning.
A closed low pres system was spinning west of the Baja CA coast, with Pac moisture streaming around this feature and into the area resulting in some sctd to bkn cirrus over the region.
926 AM EST Wed Dec 21 2016 High pressure over the southern Appalachians will move offshore today and tonight, making way for a cold frontal passage on Thursday.
A cold front is now crossing the CWA with northwest winds behind it generally gusting to 30-40mph across the northeast WY and western SD plains. Short range models and forecast soundings continue to show strong NW winds continuing this morning with the strong pressure gradient on the backside of the low. The previous shift noted the cold front moving in quicker than progged. Skies will clear out today and remain clear through Thursday as high pressure settles in across the region.
Otherwise, south winds around 5 to 10 knots today to become light and variable followed by north at 5 knots after 22/06Z as high pressure rebuilds across the region.
621 AM EST Wed Dec 21 2016 High pressure will remain in place across the area today allowing for seasonable temperatures. A mid- level trough will move through the Great Lakes Wednesday night and Thursday, with a weak cold front moving through the Ohio Valley Thursday afternoon.
Wind will slowly veer to w by late in the day ahead of a cold front. /issued 323 AM CST Wed Dec 21 2016/ Looking at a quiet morning and day ahead as a few high clouds drift overhead associated with a cut-off upper low over the Pacific. This system will affect us later this week, but first we will deal with a very warm day today followed by a cold front tonight. Low pressure developing at the surface over the TX Panhandle will lead to westerly downslope flow across our region this afternoon. Weak isentropic lift will also develop behind the front tonight and may lead some drizzle or even freezing drizzle across SE NM if temperatures are cold enough. Temperatures will be much cooler Thursday behind the front with highs mostly in the 40's and 50's across the area.
629 AM EST Wed Dec 21 2016 High pressure will be centered near the forecast area today and tonight. A weak and dry cold front will move through the area late Thursday.
Some freezing fog is occurring early this morning but is confined to mainly areas near the Tennessee River. Will keep Freezing Fog Advisory going for much of the forecast area but will consider canceling portions of it later this morning if more fog does not develop. High pressure continues to cover much of the southeast U. As a result, temperatures will be warmer today with highs expected to be in the low to mid 50s. A weak cold front will move through the region tonight and early Thursday. Behind the cold front, somewhat cooler air will move into the forecast area on Thursday so temperatures will be few degrees lower with highs in the mid 40s to mid 50s. High pressure will remain over the region Thursday night bringing more dry weather with seasonal temperatures.
A cold front moving south across northern Utah will stall across central Utah today.
P-type is a wide range from rain, freezing rain, and snow. Made significant changes to the high temperatures on Thursday. Nearly all the models are suggesting colder temperatures with highs in the upper 20s, to the lower 30s.
Skies are clearing out nicely from west to east as the last bit of an upper trough moves off. Weak high pressure aloft will keep skies aloft clear today, and light offshore flow should erode the low cloud, and once it burns off, today should be pretty nice.
Patchy freezing fog is also possible in valleys given recent moisture and partly clear skies.
Southwest winds will continue through this afternoon, before a cold front shifts winds around to the north this evening. Another warm day in store for West Central Texas, with afternoon highs climbing into the low to mid 70s. A cold front will arrive across the Big Country late this afternoon, just after max heating, and move through the remainder of West Central Texas tonight. Cooler and drier air mass behind the front, with overnight lows dropping into the 30s.
950 AM EST Wed Dec 21 2016 High pressure will build over the area today.
414 AM CST Wed Dec 21 2016 Persistent stratocu clouds south of Interstate 30 have kept temperatures warmer than expected so far tonight. The clouds should persist mainly over Southern Arkansas and North Central Louisiana, so daytime temperatures should be cooler there. A cold front will move across the region overnight tonight/early Thursday morning. A cutoff upper trough over the Pacific west of the Baja Peninsula will open and merge with the Westerlies on Thursday.
The high temperature forecast was increased a couple degrees, so expect readings near, or a couple degrees above the seasonal averages on the strength of warm advection in advance of that system. At this time, the highest PoPs, albeit still chance/scattered numbers, will remain relegated to the I 80 corridor where some lake enhancement may better support snow showers behind the frontal passage.
Ample sunshine, continued snow melting, and decent mixing of warmer air aloft on forecast soundings should result in highs reaching the lower to middle 40s this afternoon.
At this time, the highest PoPs, albeit still chance/scattered numbers, will remain relegated to the I 80 corridor where some lake enhancement may better support snow showers behind the frontal passage.
A building mid- level cloud deck from northwest to southeast is helping to limit fog development for northern portions of the forecast area, as well as to keep temperatures several degrees warmer than expected for our parishes and counties along and west of the Mississippi River. Most of the area should see highs climb into the low 60s or upper 50s today. Looking at the 295K isentropic surface (approx 925-850mb) during that time shows enough isentropic ascent and moisture convergence in the low levels to generate a few light rain showers as the front moves through. Have kept POPs at 20 percent along and south of the Highway 84 corridor, where chances for measurable precip are best.
High pressure will then build into the area for Thursday which will lead to slightly cooler temperatures with highs in the mid 30s to near 40.
This drier air will slowly erode the low clouds and fog, first across northern areas by later this morning into the early afternoon, then across central and southern zones during the mid and late afternoon hours. Temperatures today will be cooler compared to previous days due to the cool air advection with highs only reaching the upper 60s to around 70 across the Nature Coast, lower to mid 70s central zones, and upper 70s far south.
850 AM EST Wed Dec 21 2016 High pressure will be centered near the forecast area today and tonight. A weak and dry cold front will move through the area late Thursday.
With temps in the mid to upper 20s, the fog is freezing and causing slick spots on area roadways.
548 AM EST Wed Dec 21 2016 Low pressure will pass well north of the area today. Low pressure will move across Southern Canada today passing well to the north of the region. A cold front will move across the state tonight with more snow showers in the west and north. Weak low pressure will approach from the west late tonight.
938 AM EST Wed Dec 21 2016 High pressure will be centered near the forecast area today and tonight. A weak and dry cold front will move through the area late Thursday.
908 AM EST Wed Dec 21 2016 Forecast generally on track as High Pressure builds just NW of the region over the SE U. , still expect a very slow breakup of the low clouds, drizzle and fog during the early afternoon hours.
A cold front will move into the region bringing north winds. Skies continue to clear over the coastal plains as mid and upper- level ridging and drier air move into the area. A cold front will move through the area between 06-09Z Thursday, bringing a switch back to northerly winds and CAA.
Warmer temperatures are in the forecast Wednesday as the airmass over the region gradually warms up.
A pocket of stratus clouds looks to trail behind the trough impacting the area tonight.
Temps slightly warmer closer to the frontal boundary, but still topping out in the M70s. Numerical guidance shows clouds breaking up by late aftn, but given the lowest sun angle of the year is in play, any "warming" impact will be minimal.
1028 AM EST Wed Dec 21 2016 High pressure will remain in place across the area today allowing for seasonable temperatures. A mid- level trough will move through the Great Lakes Wednesday night and Thursday, with a weak cold front moving through the Ohio Valley Thursday afternoon.
POST FRONTAL WINDS HIT 50 TO 60 MPH FOR A COUPLE OF HOURS OVERNIGHT, BUT HAVE BACKED OFF ENOUGH TO CANCEL THE HIGH WIND WARNINGS IN THE NW SECTION OF OUR CWA. LOOK FOR BRISK WINDS ACROSS THE CWA, AND HIGHS A LITTLE COOLER THAN YESTERDAY.
/Issued 339 AM EST Wed Dec 21 2016/ Unique and potentially dangerous setup this morning as subfreezing surface temperatures and ample lingering low level moisture has resulted in fairly widespread freezing fog with some locations down as low as a quarter mile visibility. There will likely be some slick bridges and overpasses in north GA and north central GA this morning. Have expanded the Freezing Fog Advisory now to include an area along and north of a LaGrange to Macon to Louisville line including all of north GA and the Atlanta metro.
411 AM CST Wed Dec 21 2016 A dry cold front is making its way across western Nebraska and eastern Colorado early this morning.
534 AM CST Wed Dec 21 2016 Water vapor imagery/RAP 500mb analysis showing a well defined mid- level trough swinging eastward through North Dakota. There is a slight chance for some freezing drizzle in the afternoon as well across that area with loss of cloud ice. Plan on highs across the area in the lower to middle 30s. Thursday will be a quiet/mostly sunny day as high pressure slides across the region with temperatures topping off in the upper 20s to the lower 30s.
600 AM EST Wed Dec 21 2016 High pressure will build over the area today.
I generally kept what we had going for temps because of the uncertainty of the extent of clearing once the low passes to the East. If we can clear out early enough Southern sections especially will need a bump in temps while Northern locations with snow pack and closer to the lower cloud deck should be o. For tonight high pressure will nose in from the West and the wind will have a northwesterly component so I nudged temps a couple degrees cooler from last night's lows.
West and southwest winds 5 to 10 knots or so this morning will shift to the north by 14Z to 16Z today as a cold front moves through. Winds will increase to 15 to 25 knots with gusts near 30 knots behind the cold front but will diminish to around 5 to 10 knots or so by 23Z today to 01Z Thursday. /Issued 450 AM CST Wed Dec 21 2016/ Latest upper level analysis places upper level high pressure over Gulf of Mexico and a cutoff low over the Eastern Pacific Ocean. sided with the warmer guidance (RAP/HRRR/ARW) with the caveat that cloud cover could result in cooler highs. The cutoff upper low over the Pacific starts moving towards the southern Plains as a trough moves out of the Pac NW and deepens over the Great Basin.
646 AM EST Wed Dec 21 2016 High pressure will be centered near the forecast area today and tonight. A weak and dry cold front will move through the area late Thursday.
The 7 am regional surface analysis showed an area of high pressure across much of the Southeast. Vapor imagery and upper air data showed a rather flat ridge over the Southern Plains, with very dry, sinking air in northwest flow aloft over our forecast area. Visible satellite imagery showed multiple large breaks in the low overcast which have enshrouded our forecast area the past few days, and vertical mixing will rapidly erode these clouds so that we expect clear skies by noon.
Areas generally north of a Selma to Wedowee line will be at or below freezing with the fog, so the freezing fog advisory is in effect. So besides the typical issue of fog restrictions, caution needs to be advised for slick spots as well due to any potential icing, especially along and north of I-20, where temperatures are several degrees below freezing and will be affected more.
632 AM EST Wed Dec 21 2016 Freezing fog is impacting some of the terminals. Freezing fog will be possible through the first couple of hours of this TAF issuance before the sun rises and burns it off.
1015 AM EST Wed Dec 21 2016 High pressure will extend across the Southeastern U. A moisture-starved cold front will cross our region Thursday afternoon and evening. An area of high pressure at the surface will build into then settle over the Carolinas today. the weak cold air advection noted on the 850mb analysis will likely be offset by the downslope component of the low level wind. Lows generally in the lower to middle 30s, shy of optimal radiational cooling values, given both the potential uptick in clouds, and occasional stirring. ~MWS The models have slowed by a few hours with the moisture-starved cold frontal passage Thu afternoon, and evening in the SE. On the heels of the dry cold front on Thursday, high pressure with pacific origins will settle over the area, resulting in near normal highs.
912 AM EST Wed Dec 21 2016 Low pressure will pass well north of the area today. Low pressure will move across Southern Canada today passing well to the north of the region. A cold front will move across the state tonight with more snow showers in the west and north. Weak low pressure will approach from the west late tonight.
Winds will weaken this afternoon as surface ridging builds into the area. Temps will be cooler today with quite a bit of cloud cover for much of the day. Quiet weather will continue Monday and Monday Night as high pressure shifts east of the region.
Temperatures will be a bit cooler than yesterday with highs topping out in the upper 40s to lower 50s. Min temps will range from the lower 30s over the interior west to the upper 30s/lower 40s east and along the Great Lakes shores. The biggest questions related to type over mainly the higher terrain of the central and west. Low pressure sliding through the area this afternoon and evening will continue to bring a rain showers and MVFR ceilings to each of the TAF sites. A tightening gradient between a deep low pressure system moving through Quebec and a high pressure ridge building into the Plains could lead to a period of NW winds gusting to 30 knots over eastern Lake Superior tonight into Monday.
255 PM CDT Sun Oct 23 2016 Early-afternoon water vapor imagery and 12z upper-air analysis showed mid-level ridging along the spine of the U. This upper-air disturbance is associated with a cold front which moved through our area earlier this morning with 18z surface observations indicating modest cold advection occuring in the wake of the frontal passage.
High pressure will keep mostly clear skies and dry weather across the area overnight and Monday.
222 PM MDT Sun Oct 23 2016 A broad ridge just east of the forecast area will continue sliding east as a large trough spins off the Pacific Northwest coast. This flow and the trough will draw subtropical moisture north through Arizona and into Utah and by late Monday afternoon this moisture will spread into eastern Utah.
and low pressure over Atlantic Canada. High pressure will return for midweek. Low pressure will approach from the west late in the week. The autumnal cycle of cold fronts bringing temperatures down is underway.
312 PM EDT Sun Oct 23 2016 Northwest upper flow relaxes through the period but remains sufficient to push a re-enforcing cold front through by late in the day Monday.
Upper ridge in Mexico expands eastward during the second half of the work week which may contribute to 1-2 degree bump in temps. 47 With high pressure lingering to our east, we should continue to see mostly light (to occasionally moderate) E/SE winds across the upper Texas coast these next several days.
The ridge is expected to slide further to the east today to center over Alabama. The biggest thing of note for today will be the low humidity. Temperatures after a cold start are expected to get a little warmer today and not as chilly tonight as cold air advection decreases.
220 PM PDT Sun Oct 23 2016 Cooler with periods of wet weather as a couple of systems will bring chances of rain and high elevation snow this week. A trough of low pressure remains off the west coast and will continue to spread some high clouds over the area. Snow levels will be high so any new snow will mostly be over the peaks and maybe some of the higher seasonal mountain roads. Locally windy conditions are still possible over the far north end of the valley and over the ridgetops.
/This evening through Monday/ Breezy northwest winds this afternoon will weaken into this evening as mixing decreases and surface ridging across the northern Plains builds into the state.
Because of the weak warm air advection, temperatures are expected to be a few degrees warmer than yesterday, with highs in the low to mid 70s. The quiet and dry wx pattern will continue thru this period as high pressure dominates the area.
An area of low pressure along the North Dakota and Minnesota border will move quickly into southern Wisconsin this afternoon and into southeast lower Michigan by early evening. We continue to have the highest POPs over far northern Minnesota this morning shifting them into far northern Wisconsin this afternoon. Expect highs from the upper forties along the International Border to the lower to middle fifties south. High pressure will build in tonight with the region remaining dry. High pressure will keep the area dry through Monday with highs from the lower to middle forties north to lower fifties south. Monday night finds upper level and surface ridging covering the area.
The other feature of interest will be a cold front that stalls out just as it enters our forecast area this afternoon. For the extreme southwestern TX Panhandle, this means shaving a few degrees off the highs today. Upper level ridging will persist through much of the week and will continue to result in warm and dry conditions with both low and high temperatures generally running above to well above seasonal norms.
The S/W energy embedded in a strong SW flow ahead of a digging EPAC trough is also associated with a strong upper jet max that is forecast to move though the region tomorrow. unless the lower levels begin to moisten up.
256 PM CDT SUN OCT 23 2016 Temperatures have warmed up nicely this afternoon, with current temperatures 35-40 degrees warmer than morning lows in most locations. Will continue to use the coldest guidance numbers given the ongoing drought, with most locations in the lower 40s and a couple upper 30s possible. The warming trend will continue tomorrow with most areas reaching the low 80s. A weak cold front currently moving through the Midwest will move into the area late Monday but will be dry and in the process of dissipating.
/issued 1035 AM CDT Sun Oct 23 2016/ Increasing cirrus shield wrapping around topside of upper ridge over northern gulf. 10 am temps mainly in the lower 60s should warm another 15 degrees, yielding highs around the upper 70s to possibly near 80. WV imagery shows the upper ridge gaining ground on the srn CONUS this morning in the wake of the departing trof over the E Coast. Weak disturbance moving around the wrn periphery of the ridge bringing some cirrus to our region, and this will continue throughout today and into Tue.