Aikyam-Lab/Synoptic-Bench huggingface dataset:
there is a flat ridge situated over the southern tier of states with an upper level trough near Lake Winnipeg in southern Canada. As this upper level trough makes its way into Quebec on Monday. it will begin to suppress the ridge forcing it to retrograde to the west. The combination of the breakdown of the upper level ridge. As the upper ridge continues to retrograde to the west. As the low level jet sets up during the overnight hours. temperatures should remain near seasonal levels with highs in the upper 80s to lower 90s and overnight lows in the low to mid 70s.
1211 AM EDT MON JUL 25 2016 High pressure will cross the region tonight then move east Monday.
A cold front in name only passes Monday afternoon bringing the chance of a downpour.
1006 PM EDT SUN JUL 24 2016 A weakening cold front will move southeast across the area tonight into monday.
931 PM EDT SUN JUL 24 2016 High pressure continues to ridge across the state from the Atlantic at the surface. Will update to remove evening storms and adjust any zones that the lowered temps may cross categories. High pressure ridging across the waters from the Atlantic will keep a generally light SE flow across the waters for the next several days.
A ridge is crossing the Divide this evening and satellite and radar imagery show clear skies over Northeast. Templer Previous Discussion: Synoptic Setup: A large heat dome exists over the southwestern quadrant of the CONUS while weakly ridged flow exists across the Pacific Northwest, Montana, and southwest Canada. Today through Monday: Developing synoptic ridge to the west will amplify and slowly move east.
956 PM EDT SUN JUL 24 2016 High pressure will cross the region tonight then move east Monday.
The higher DCAPE values earlier in the day did lead to downburst signatures being observed on radar velocity. Northern portions of the area have seen a little less in the way of convection, so temperatures there made it in to the lower 90s.
Otherwise, no changes were made to the low temperature forecast with another muggy night expected.
1256 AM EDT MON JUL 25 2016 A weakening cold front will move southeast across the area tonight into monday.
1100 PM EDT SUN JUL 24 2016 A ridge of high pressure will expand across the Carolinas bringing uncomfortable levels of heat and humidity this week. Expect quiet conditions to continue overnight as ridge of high pressure remains in place. Temperatures have already lowered into the lower 80's tonight, and they will continue to lower into the mid 70's inland and mid to upper 70's along the coast overnight.
High pressure will bring dry and mild weather tonight and Monday.
As the subtropical ridge retrogrades over the Central Great Basin area toward the middle of the week, northwest mid/upper flow will develop downstream across the central Conus. Uncertainty grows as we move into the weekend as the GFS is more aggressive building the mid/upper ridge back into the central Conus. The main synoptic cold front looks to extend from south of KMCI-north of KHUT-north of KDDC.
955 PM EDT SUN JUL 24 2016 A cold front will approach from the west on Monday and will cross the region Monday night, providing another round of showers and thunderstorms.
Could see some moist convection develop later this evening across this region with the onset of LLJ and a mid to upper trough axis moving through the plains. Temperatures will slowly begin to cool over the next several days with our region becoming influenced by northerly flow as the ridge continues to shift westward.
A cold front will move through the area today resulting in a weak and brief wind shift to the northeast. /issued 343 AM CST Tue Dec 13 2016/ Current observations show a cold front in the Texas Panhandle which is moving south towards the Permian Basin early this morning. Another cold front will follow Wednesday night and with deeper cold air behind it will have more of an impact.
A quick upper disturbance and associated cold front are impacting central Indiana currently with snow across the area.
The continuous influx of arctic air will generally keep highs in the low 30s south of I-70 and mid to upper 20s north of I- 70 and lows in the teens.
643 AM EST Tue Dec 13 2016 Aviation An arctic cold front will move through today with frigid temperatures through the end of the week, along with some lake effect snow. Low pressure arrives for the weekend with several inches of snow possible and some mixed precipitation across southeast Lower Michigan.
Temperatures will remain well above normal, with high temperatures today in the low to mid 70s across southeast Georgia and the Suwannee Valley, and the upper 70s to lower 80s across northeast Florida. A cold front will then push through the waters Wednesday and Wednesday night. High pressure will then build to the north of the region through the end of the week.
Later tonight, temperatures will drop into the low to mid 20s as northwest breezes persist.
Models are pessimistic for the overnight period despite a cold front pushing through the area.
As mixing and surface heating gets underway the fog over the land area should burn off by late morning with improving visibilities expected, however the warm moist air mass overriding the cooler Gulf waters will likely maintain the dense sea fog through the remainder of the day and mariners are urged to exercise extreme caution.
630 AM EST Tue Dec 13 2016 A nearly stationary front across Georgia and coastal South Carolina will move back north as a warm front today. Rain chances will increase through Wednesday as weak low pressure moves through the area along the front. A cooler and drier air mass will return late in the week. A weak cold front will be stalled just south of the forecast area this morning. Morning lows tonight will range from the lower 40s north to the lower 50s south. For tonight, a stronger cold front will approach from the west.
445 AM CST Tue Dec 13 2016 (Today and Tonight) A cold front will move into the Big Country early this morning, then through the rest of the forecast area by late morning, resulting in north winds of 10 to 15 mph, with higher gusts. High temperatures this afternoon will range from the low to mid 50s across the Big Country to near 70s across the Interstate 10 corridor. Overnight low temperatures will generally be in the low to mid 30s, although a few lower 40s are possible across the southern counties where low cloud development is forecast.
A weak weather disturbance will bring cloudy skies today with areas of precipitation confined mainly to the higher terrain.
Otw, high pressure over western Canada will build quickly southeast and bring increasingly colder air to the area.
843 AM EST Tue Dec 13 2016 Rapidly moving low pressure will spread snow across the much of the region today and will usher in an arctic airmass for the late week. Another system will move in for the start of the weekend, bringing a wintry mix and some warmer air. Further south, temperatures should warm enough to allow for a mixture of rain/snow and light accumulations are expected over the southeast ridges after the the frontal passage for a short duration within upslope flow.
420 AM MST Tue Dec 13 2016 Flat ridging over the western U.
An upper low out in the Pacific continues to feed moisture into the area on a westerly flow. On Wednesday a strong and wet storm will arrive out of the Pacific with circulation around the upper low helping to pull a moisture plume along to feed it.
A warm front pushes up from the south Wednesday afternoon and through the overnight hours. Snow levels will be steadily increasing during the passage of the warm front, to the point that portions of Lemhi county and maybe even southwest Montana could experience a rain/snow mix. Pockets of freezing rain could be possible Wednesday night, but will be dependent on the strength of valley inversions. The latest model runs have decreased the amount of precipitation associated with this event, but the higher terrain could receive another round of significant snow accumulations.
A cold front will move through the area this morning, resulting in north winds of 8 to 15 knots, with higher gusts. /issued 445 AM CST Tue Dec 13 2016/ (Today and Tonight) A cold front will move into the Big Country early this morning, then through the rest of the forecast area by late morning, resulting in north winds of 10 to 15 mph, with higher gusts. High temperatures this afternoon will range from the low to mid 50s across the Big Country to near 70s across the Interstate 10 corridor. Overnight low temperatures will generally be in the low to mid 30s, although a few lower 40s are possible across the southern counties where low cloud development is forecast.
Expect the FG and very low cigs to persist through much of the morning until a cold front begins to shift S into the area by midday through the afternoon. Further north, expected more patchy dense fog to soon develop, although less extensive as in the higher dewpoint airmass south of a weak boundary, ranging from the upper 50s to lower 60s south of the interstate. This front will push into northern gulf on Wed, and a large high pressure region movg into central plains Wed night. Another cold front movg into southern plains early in wknd will result in scattered convection across the area, with saturated low layers and stg low lvl unidirectional shear above boundary layer.
A deep upper level low pressure center will be located just south of Hudson Bay Canada with a large area of bitter cold temperatures across North Dakota and Minnesota into the Great Lakes Region. Far southwestern areas will moderate the most into the lower 30s, while much of north central Nebraska will be held in the lower to mid 20s. A reinforcing cold front will drop south through the area overnight.
For today expect a little drier conditions as high pressure builds across the region, keeping chances of rain on the low end this afternoon with only a few showers expected at times. A weakening cold front will enter northern Florida Wednesday and approach the region Wednesday night.
650 AM EST Tue Dec 13 2016 A cold front will move through the area late this afternoon and early this evening bringing snow showers and colder air.
Areas of patchy fog and light rain or drizzle will also be seen ahead of a cold front as it slowly moves southeast into AR from the north.
Latest water vapor imagery shows a large cyclonic rotation with a dominate northwest flow into North Dakota around a Hudson Bay upper low. With weak warm air advection and westerly winds, it will be slightly warmer today with highs ranging from 5 above north to 12 above south. A subtle low level cold front today (best observed with slight kink in the surface isobars and the pocket of 850mb temperatures bounded in the -24C to -26C range - currently located from central Manitoba west into central Saskatchewan) will begin to shift south this afternoon and reach our northern border around midnight tonight, then into south central ND by 12z Wednesday.
422 AM MST Tue Dec 13 2016 Upper low spins over northern Manitoba, and a 150-kt jet streak is moving over the central plains. At the surface, high pressure sits over the northern plains. With cold high pressure over the region, today will be mainly dry. Low-level trough will begin approaching the region Wednesday night.
Feature will be followed by sharply drier air and will result in a dry forecast for mid-week along with cooler temperatures.
The higher mtn areas wl likely see gusts of 50+ mph. It will be a little cooler in most locations today, with mostly 40s acrs the sern plains and in the upper 30s to lower 40s in the high valleys.
Southern stream extended from OR to MO with a low amplitude ridge centered off the west coast. Water vapor loop indicated an upper level trough was over northern MAN and extended into ND. Some warm advection will occur ahead of jet streak, then cooler air will follow in tow tonight and Wed. Low amplitude ridge off the west coast will build and shift into the Northern Plains by 12Z Fri.
524 AM CST Tue Dec 13 2016 Cold front had pushed well south of the area and extended from northwest Illinois into southeast Kansas at 08Z.
At 09Z the lowest wind chills were at Sand Lake RAWs, Marshall County RAWs, and ATY with -32F.
After a period of clear skies today, more clouds may sag into at least northern Wisconsin tonight into Wednesday as the cold upper low sags into the northern Great Lakes Region.
940 AM EST Tue Dec 13 2016 A trough of low pressure will bring a wintry mix of precipitation today.
Meanwhile, an arctic cold front stretches from Davenport, Iowa to St. The arctic cold front will push into the Mid-South around sunset.
500 AM CST Tue Dec 13 2016 At 3 AM, the arctic cold front had moved south into southern Iowa. Another arctic cold front will move southeast across the area tonight.
631 AM EST Tue Dec 13 2016 Rapidly moving low pressure will spread snow over the Upper Ohio Region on today and will usher in an arctic airmass for late week. Another system will move in for the start of the weekend, bringing a wintry mix and some warmer air.
426 AM CST Tue Dec 13 2016 A cold front today will bring temps to more seasonable levels and another cold front tomorrow will drop temps even more. With moisture in short supply with upper level ridging in place, the frontal passages will remain dry. However, the upper level pattern will be changing for the end of the work week as a low pressure system makes it way across the Rockies and brings moisture with it.
Transitory ridge continuing to build over the area this morning, with clearing skies resulting in some areas of patchy fog, especially around Baker. With the current building ridge, mostly dry conditions expected through the afternoon, though a slight push of moisture may result in a few areas of snowfall across northern Valley and Adams counties this afternoon. Some areas, especially eastern Oregon may see significant snowfall with this event, with the current forecast demonstrating the potential for 4 to 8 inches with locally higher amounts over the higher terrain. With snowfall anticipated to reach into the Lower Treasure Valley during the afternoon commute, the decision was made to include the area in the Winter Storm Watch.
Further north, expected more patchy dense fog to soon develop, although less extensive as in the higher dewpoint airmass south of a weak boundary, ranging from the upper 50s to lower 60s south of the interstate. This front will push into northern gulf on Wed, and a large high pressure region movg into central plains Wed night. Another cold front movg into southern plains early in wknd will result in scattered convection across the area, with saturated low layers and stg low lvl unidirectional shear above boundary layer.
534 AM CST Tue Dec 13 2016 A modest cold front pushing southward through KLBB at this hour will be followed by mostly under 12 knot winds all areas today. /issued 342 AM CST Tue Dec 13 2016/ A weak cold front was sliding southward through the area early this morning behind the latest disturbance cruising through Missouri and heading towards the Ohio Valley later today. The next cold front is scheduled to move through the area on Wednesday during the daytime. The timing of the front will lead to little confidence in the high temperatures forecast on Wednesday.
In the middle and upper levels(700-200 mb), latest available IR imagery overlaid with model streamline analysis as of 900 am depict the continuation of low amplitude polar troughing across the entire CONUS. South Florida and the Florida Keys are beneath the far northwestern periphery of an expansive deep and warm anticyclone centered near the Mona Passage. The net result is 50 to 75 knot southwesterlies at 250 mb transporting some cirrus over the Florida Keys, At the surface and in the Lower to Middle Levels, (Surface to 700 mb), Latest IR imagery overlaid with available marine and land surface observations and surface analysis detail the center of a 1032 mb surface arctic high pressure system positioned in the Central Plains. Temperatures are already in the middle to upper 70s with dewpoints in the lower to middle 70s.
/Issued 426 AM CST Tue Dec 13 2016/ A cold front today will bring temps to more seasonable levels and another cold front tomorrow will drop temps even more. With moisture in short supply with upper level ridging in place, the frontal passages will remain dry. However, the upper level pattern will be changing for the end of the work week as a low pressure system makes it way across the Rockies and brings moisture with it.
642 AM EST Tue Dec 13 2016 A trough of low pressure will bring a wintry mix of precipitation today.
High pressure across the region will maintain tranquil boating conditions with light winds and slight seas over the Gulf waters the remainder of today. Main concern will continue to be areas of dense sea fog as warm moist air continues to override the cooler waters, and have already extended the dense fog advisory for all of the waters through 7 PM EST this evening and an additional extension to this advisory may become necessary later this afternoon if conditions warrant.
Partly cloudy skies with warmer than normal temperatures will continue the rest of today. Max temps will range in the low to mid 80s. CUT-OFF UPPER LOW WILL GRADUALLY FILL (WEAKEN) AS IT TRANSLATES SLOWLY EAST ACROSS THE CAROLINAS. TEMPERATURES WILL BE SEASONABLE REACHING THE LOWER 90S INTERIOR AND MID 80S AT THE BEACHES. EAST COAST UPPER TROUGH AND ASSOCIATED MID-ATLANTIC CLOSED LOW BROADEN/OPEN FRI TRANSITIONING SEAWARD SAT INTO SUN AS MODEST UPPER RIDGING REPLACES OVER THE SOUTHEAST. SFC PATTERN YIELDS INITIAL ONSHORE FLOW VEERING FROM SE TO S TO SSW MON-WED AS RIDGE AXIS SETTLES SOUTHWARD.
There has been some slight improvement in the visibility San Antonio metro area as the weak warm front moved north but for now will keep in the advisory and monitor trends. Some patchy light drizzle is also possible thorough the early morning hours near the warm front across the central and eastern counties. A weak cold front will move into the area midday and provide a wind shift to the west and northwest and clearing along and west of the I-35 corridor. Low clouds return tonight and slightly cooler temperatures are expected on Wednesday.
641 AM EST Tue Dec 13 2016 A cold front will move across the area today, likely accompanied by a period of snow, especially along and southeast of U. High pressure will build into the area tonight providing dry weather and very cold temperatures. Another cold front will move across the area Wednesday bringing even colder air into the area along with lake effect snow over northern portions of the area.
Chattanooga Airport, TN 51 36 52 26 / 40 20 10 0 Knoxville McGhee Tyson Airport, TN 52 34 47 23 / 40 30 10 0 Oak Ridge, TN 47 33 47 22 / 40 20 10 0 Tri Cities Airport, TN 51 33 44 20 / 40 40 10 10.
916 AM EST Tue Dec 13 2016 A nearly stationary front across Georgia and coastal South Carolina will move back north as a warm front today. Rain chances will increase through Wednesday as weak low pressure moves through the area along the front. A cooler and drier air mass will return late in the week. Afternoon highs will range from around 50 north to the lower 60s south. For tonight, a stronger cold front will approach from the west.
Gusty north winds early this morning will decrease into the 10 to 15 mph range by noon as a cold dome of high pressure begin to builds into Kansas. Another upper level disturbance will rotate around an upper low that will remain nearly stationary near Hudson Bay mid week which will keep the cold air in place across western Kansas.
The high should be centered over the lower Missouri River Valley by 00Z this evening, but large scale ridging will rebuild in its wake overnight. Trended temperatures several degrees cooler for today and tonight owing to the strength of the CAA with upstream high temperatures in SD yesterday (roughly where our incoming airmass was located) only reaching the single digits.
501 PM EST Wed Mar 8 2017 Dry and windy conditions are expected today as strong high pressure moves in.
Thus will keep lows in the northern tier in the single digits below zero with the far southern counties staying in the low teens above. Temps on Thursday will be cooler than today, although wind speeds will be much lower. Thursday night will bring the coldest night in awhile with high pressure ridging parked over the area.
low level moisture with 50+ degree dewpoints and cloud cover were streaming northward within the low level flow. temperatures overnight tonight are forecast to remain warmer compared to last night.
IFR cigs with patchy FG should develop after 09Z across lower E TX/Wcntrl LA, spreading N across the remaining E TX terminals through 12Z as a warm front lifts N overnight. Isolated -SHRA may redevelop late tonight across portions of E TX/N LA in VC of the warm front, but given the isolated nature of any development, have omitted mention in the 00Z TAF's attm. /issued 415 PM CST Wed Mar 8 2017/ Southerly return flow has given way to a very warm and springlike day with high temperatures in the lower to mid 70s this afternoon.
949 PM EST Wed Mar 8 2017 A quiet night across the region with high pressure promoting a mostly clear sky. Good radiational cooling has taken place, but some light southerly winds overnight should keep the mercury above the freezing mark in most locations in the valley (despite the dry air). Chattanooga Airport, TN 40 72 54 64 / 0 0 60 40 Knoxville McGhee Tyson Airport, TN 37 68 51 59 / 0 0 50 40 Oak Ridge, TN 37 70 51 59 / 0 0 60 40 Tri Cities Airport, TN 34 67 44 55 / 0 0 50 40.
710 PM EST Wed Mar 8 2017 High pressure south of the area through Thursday.
One more mild day ahead as high pressure builds into the Deep South, opening the door for SW return flow into the Lower Ohio Valley. Temps will be a few degrees warmer than today, with most locations reaching the lower/mid 70s. Fire weather concerns are alleviated as the low-level RH will recover and the winds will remain fairly marginal. Pattern change really kicks in Thu night/Fri as a strong cold front moves through.
Temps on Thursday will be cooler than today, although wind speeds will be much lower. Thursday night will bring the coldest night in awhile with high pressure ridging parked over the area.
Greatest confidence in the low ceilings is at MAF, INK, and HOB, where fog may also develop around daybreak. Some minor disturbances will pass over the area as a weak low pressure system moves eastward from the Baja coast.
Surface winds were light, with a pressure ridge center in near proximity, over northern AL and middle TN. This pressure ridge will lift east overnight, increasing pressure gradient over the Midsouth.
856 PM CST Wed Mar 8 2017 At 800 PM, a weak coastal trough was located over the western Gulf.
A weak upper level ridge will be over the state through Thursday bringing continued NW flow. Moisture over the ridge will help to keep mid level clouds over the region with stability above mountain top that may lower enough to develop a weak mountain wave by the late morning.
433 PM MST Wed Mar 8 2017 Updated aviation section Temperatures across the region warmed quite a bit compared to yesterday with 50s across many of the higher valley locations and temps near to just a bit above 60 degrees in the lower valleys of southeast Utah and west-central and southwest Colorado. Expect a similar trend with warmer temperatures Thursday as a dry northwesterly flow remains overhead with high pressure across the western states.
Subtle ridging should build along the spine of the Rockies late this week as a high pressure center west of Baja California Sur maintains its presence.
649 PM EST Wed Mar 8 2017 High pressure south of the area through Thursday.
On Thursday, an upper level west coast ridge will creep closer to the region, bringing another weak embedded short wave in from the northwest.
711 PM EST Wed Mar 8 2017 Dry and windy conditions are expected today as strong high pressure moves in.
523 PM CST Wed Mar 8 2017 Subjective analysis of 12z upper-air data and current water vapor imagery indicate a broad mid-level trough from the vicinity of Hudson Bay south through the Great Lakes with a west-northwest flow regime present upstream across the western CONUS.