Aikyam-Lab/Synoptic-Bench huggingface dataset:
Expect these light showers to continue to move across the area through the afternoon hours and evening before the cold front moves into the delta overnight. Updated the forecast to account for these showers and also updated temps to better reflect the slightly cooler conditions. Breezy south-southeast winds today in advance of an approaching cold front. There will be a slight chance for showers or an isolated thunderstorm through midnight tonight, and then rain chances will quickly increase for the northwestern half of the forecast area as the approaching cold front moves in.
A strong cold front can be seen moving south through Texas Panhandle region as of 230pm this afternoon. 20 (Tuesday night through Monday) Mid levels of the atmosphere will begin to saturate from north to south Tuesday night as an upper trough develops over Southwest United States.
150 PM EST Mon Dec 4 2017 It will remain relatively warm ahead of an approaching strong cold front through Tuesday.
248 PM EST Mon Dec 4 2017 Strong cold front Tuesday.
There should be a late afternoon into early Tuesday morning break from the convection but ceilings should still lower into MVFR to IFR and there could be pockets of MVFR-cat fog development from this evening through the cold frontal passage Tuesday morning. This cold front may produce a broken line of storms just ahead of it as it crosses the local air fields between sunrise and noon tomorrow.
325 PM CST Mon Dec 4 2017 A strong cold front is still on track to push into the region later tonight. A prefrontal trough currently pushing across the central TX Panhandle will move through the FA during the late afternoon and evening. A wind shift to the north with winds around 15 mph are expected with the trough. The actual cold front is currently situated across southeastern CO into southern KS. Cooler temperatures along with an increase of winds to 20- 25 mph are expected once the surface front pushes through. Models (mainly the GFS) are skeptical in the moistening of the lower levels, but if the duration of precipitation that is forecasted goes on a planned there should be enough time to saturate the lower levels to allow precip to make it to the surface.
254 PM CST Mon Dec 4 2017 A cold front and band of showers/isolated storms will track across the forecast area this evening. Once the band of precip shifts east of our area, along with the cold front, late this evening, winds will shift into the west which should start the downward trend in temperatures for the rest of this week. A rather large temperature gradient across the region tonight with lows forecast to dip to the upper 20s north to the lower 40s far southeast counties. Highs on Tuesday will rise into the upper 30s far north to the low to mid 40s far south, but the gusty winds will make it feel much colder than that.
119 PM MST Mon Dec 4 2017 Cold front has pushed well south and east of the Cheyenne CWFA this afternoon with winds and snow easing. All wind and winter headlines have been dropped this afternoon as high pressure builds into the area. Warmer temperatures Tuesday as we transition back to a more westerly downsloping weather pattern.
High pressure aloft will bring dry and stable weather to Western Washington through this weekend, at least. Areas of fog are likely at times in the lowlands, but the mountains will have clear and relatively warm weather. Northerly flow aloft continues over Western Washington this morning ahead of the upper ridge centered offshore near 130W. The air mass is dry aloft but moist in the lower levels with areas of fog, especially over the interior lowlands from the Puget Sound region southward.
303 PM EST Mon Dec 4 2017 First in a series of cold fronts approaches the forecast area tonight.
A dry cold front has moved through northern Arizona this morning.
Issued by National Weather Service MIAMI FL 250 PM EST Mon Dec 4 2017 REST OF TODAY AND TONIGHT: High pressure continues to dominate the weather pattern with sunny skies and east-northeast winds.
and Saturday A ridge of high pressure drifting southward over the region this morning. Isolated to scattered showers will be on the increase from the north as a short wave trough northeast of Lake Superior early this morning, drops south over the state as a LFQ region of an upper jet pours southward over the state. However some decent dynamics to consider such as the deep layer shear with the upper jet, total totals climbing to the lower 50s late afternoon and evening, inverted V sounding, and the potential of available moisture pooling with the surface frontal boundary associated with short wave. Sunshine will return Saturday along with a cooler and drier airmass on gusty north to northeast winds.
1201 PM CDT Fri May 5 2017 The relatively quiet pattern will continue for the next several days across the forecast area as both surface and mid/upper level ridging dominate for the next several days. With troughing over the Great Lakes region and northwest flow aloft over the eastern half of Missouri, expect slightly cooler temperatures across central and eastern Missouri than areas further west toward eastern Kansas and western Missouri.
High pressure strengthens during the weekend with a dry and mild few day.
212 PM EDT Fri May 5 2017 Low pressure will maintain rain chances and colder temperatures through the weekend. Going into tonight, the reorganizing mid-level trough axis remains generally positioned around the WV panhandle. The consensus favors elevated instability remaining ahead of the mid-level trough axis with a fair amount of convective precipitation during the overnight hours.
315 PM CDT Fri May 5 2017 An area of low pressure in northwest Ontario and northern Minnesota will continue to move a trough, followed by a cold front, will move southeast through the Northland through this evening. High pressure will then nose into the Northland tonight in the wake of the cold front. Saturday will feature high pressure, light to a bit breezy northeast flow, mostly sunny skies, and highs ranging from the upper 40s near the Lake Superior shoreline to the low 60s in central and north central Minnesota.
136 PM EDT Fri May 5 2017 Low pressure will maintain rain chances and colder temperatures through the weekend. This should bring the precipitation shield north of the low generally north of the forecast area within the next few hours. Going into tonight, the reorganizing mid-level trough axis remains generally positioned around the WV panhandle. The consensus favors elevated instability remaining ahead of the mid-level trough axis with a fair amount of convective precipitation during the overnight hours. Fries Not much change is expected over the weekend as the sharp meridional pattern remains in place and maintains the large upper trough over the forecast area through the period.
318 PM CDT Fri May 5 2017 Upper level ridging will build over the Western High Plains tonight and Saturday. Overnight lows tonight will be in the 50s, with afternoon highs on Saturday ranging from the lower 70s east to the lower 80s west.
443 PM MDT Fri May 5 2017 A straightforward forecast continues this afternoon as ridge of high pressure remains firmly in control over the central Rockies. Temperatures are running 10 to 15 degrees above average with some cumulus developing over the higher terrain as convective temperatures are breached. As the next upper-level low pressure comes ashore along the California coastline, flow will turn southwesterly aloft around noon over eastern Utah, and during the afternoon across Colorado.
107 PM CDT Fri May 5 2017 A fantastic weekend awaits as a strong ridge of high pressure builds over the region.
1230 PM CDT Fri May 5 2017 Upper level ridge of high pressure dominates the weather across the Northern Plains, a clear sky, light winds, and warm temperatures. For the short term, a weak cold front extends across the southern Prairie Provinces of Canada. Looking aloft a nearly full latitude narrow h500 ridge extends across the central US diverting any precipitation away from the northern plains in the short term. Beneath the ridge a rather modest surface pressure pattern will maintain light winds across the region. High temperatures will be impacted by the backdoor cold front late this afternoon northeast.
Moisture levels will remain low in part to an upper level ridge slowly moving closer to the central plains with two deep low-pressure systems on either side of the amplified ridge (Omega Block).
231 PM PDT Fri May 5 2017 Cooler with a threat of mainly mountain showers through the weekend.
319 PM MDT Fri May 5 2017 A straightforward forecast continues this afternoon as ridge of high pressure remains firmly in control over the central Rockies. Temperatures are running 10 to 15 degrees above average with some cumulus developing over the higher terrain as convective temperatures are breached. As the next upper-level low pressure comes ashore along the California coastline, flow will turn southwesterly aloft around noon over eastern Utah, and during the afternoon across Colorado.
154 PM EDT Fri May 5 2017 Low pressure over the lower Ohio Valley will slowly move northeast today and then continue to near Lake Ontario Saturday. Another upper level trough will slide southeast out of Canada and merge with this system over the Upper Great Lakes over the weekend. High amplitude ridge over the western half of the lower 48 states will persist through the weekend while deep digging trough will remain over the eastern half of the country.
109 PM MDT Fri May 5 2017 A large scale ridge dominated the Rockies and high plains overnight. Warmer than normal temperatures and dry conditions will prevail during the next 24 to 36 hours as the ridge slides east across the region. A deepening trough and Pacific cold front will move onshore by Saturday morning, with southerly low level flow gradually tapping into moisture late Saturday west of the Laramie Range. Warmer temperatures are forecast Saturday afternoon as 700mb temperatures peak between 10 and 13C. Could be flirting with a couple of records along the lower North Platte Valley and northern NE panhandle with highs in the mid and upper 80s.
235 PM MDT Fri May 5 2017 20z surface analysis had weak high east of the CWA with return flow starting to develop in the west ahead of developing lee trough from central MT into central WY. Large upper ridge moving into the Plains states per water vapour.
1125 AM MDT Fri May 5 2017 Upper level analysis has a long wave ridge over the Rockies creating northwest flow across the forecast area. At the surface, weak high pressure is centered over CWA, with light winds and clear skies. Upper ridge will continue to build and slide eastward, becoming centered over the forecast area by Saturday. This will bring warmer conditions with temperatures 15-20F above normal this weekend.
An anomalously deep upper low located over Tennessee will dominate our weather today. As the upper low moves eastward, a band of wrap-around rain is expected to affect the northern part of the area for the late morning into the afternoon.
Nam shows a closed 500 mb low over Lake Huron 00z Sun with a trough in the western U. and a ridge over the plains. In the extended, ECMWF and GFS show a 500 mb closed low over New England 12z Tue with a ridge over the plains and a closed low and trough over the desert sw. By 12z Thu, 500 mb troughing will be over the upper Great Lakes with a closed low over the southern plains. By 12z Fri, ridging is over the Rockies with troughing in the Pacific NW and troughing over the eastern U.
1230 PM CDT Fri May 5 2017 In the midst of this nearly "perfect" weather Friday, the only tweaks to the going forecast for this afternoon involved: - Nudged up highs 1-2 degrees most areas, aiming mainly 75-78 - Nudged down dewpoints a little, with predominantly mid-upper 30s resulting in very comfortable humidity levels Upper level flow will be from the north as a highly amplified ridge approaches. With the approach of the ridge, our 850 mb temperatures will have increased to around 11C to 14C by the time we reach peak heating, as we should get easily into the mid 70s under full sunshine. Tonight, lows will generally be in the 40s as a backdoor cold front tries to move toward the area from the northeast, but does not quite make it here by the end of Friday night.
Ridging at the surface and aloft will get underway Saturday and begin a warming trend over the area. While cooler low to middle 70s will be common in the east, the increased ridging in the west will result in lower 80s being achieved. As the upper low continues to push off to the east, the upper ridge moves into the South.
The highest chc for thunder will be across the west closer to the sunshine. The main area of low pressure will be over the Alleghenies tonight.
320 PM EDT Fri May 5 2017 Thanks to the closed upper low currently residing over the southern Appalachians, the weather today has been damp and chilly. While some light showers will linger into the evening, the overall coverage will diminish greatly overnight tonight as the low begins to pull away from the area.
1233 PM CDT Fri May 5 2017 Water vapor satellite this morning shows a short wave trough north of Lake Winnipeg. This will wave will move almost straight south through tonight as it drops into the back side of the upper level low spinning over the Ohio River Valley. This system does not look like it will bring much moisture into the region with it and the trajectories around the upper level low to the south are not favorable for moisture return into the area. For now, will keep the rain chances in the 20 to 50 percent range, with the highest values across the far eastern portions of Adams County this evening. Behind this system, Canadian high pressure will build in across the Upper Midwest.
Today will be much cooler than the past couple of days as cloudy skies settles in. An upper level trough will allow some showers to linger into Saturday, with a trend towards drier conditions late in the afternoon.
301 PM EDT Fri May 5 2017 An upper low pressure exits northeast tonight and Saturday. The upper level low pressure system currently over WV, will move slowly northeast into PA tonight and Saturday. Really not many changes from previous forecast as upper low blocking pattern looks to persist.
Cool early May weekend on tap as large upper low lifts northward into the Eastern Great lakes region by late Saturday. At the surface, cool Canadian high pressure building into the region today- tonight to filter cool and low dewpoint airmass into the region. A large closed low will linger across the northeast with a ridge building over the western and central Gulf of Mexico and north through the central part of the country.
523 PM EDT Fri May 5 2017 Strong low pressure moving into the Ohio River Valley will reach the Mid-Atlantic States tonight then lift farther north on Saturday.
225 PM CDT Fri May 5 2017 Upper level low is spinning over West Virginia and moving east. The temperature hit 54 degrees at 253 am and has not gotten any warmer. It will warm nicely with highs ranging from the lower 60s along the plateau to the lower/mid 70s along the river. It looks like another upper distrubance will slide down the backside of the lower and will keep chance pops across the forecast area.
149 PM MDT Fri May 5 2017 High pressure aloft over the area will shift east as a Pacific long wave low pressure trough begins to move inland along the West Coast. Southwest winds will pick up Saturday with the leading edge of the Pacific moisture associated with the land falling trough moving into the western mountains by mid day Saturday.
656 PM EDT Fri May 5 2017 Strong low pressure moving into the Ohio River Valley will reach the Mid-Atlantic States tonight then lift farther north on Saturday.
321 PM MDT Fri May 5 2017 The dry and abnormally warm airmass beneath a strong upper level ridge of high pressure will slowly migrate eastward over Colorado during the next 24 hours. The axis of this ridge is forecast to shift east of the Front Range on Saturday, which will allow southwest flow aloft to begin advecting mid-level moisture up into the region. The return of moisture and the steep lapse rates produced by strong solar heating should have little problem producing isolated to widely scattered showers and t-storms in the high country by mid to late afternoon. Lastly, near record high temperatures are on tap for Saturday with 80s at lower elevations and very warm 60s and 70s in the high country.
256 PM EDT Fri May 5 2017 An area of upper level low pressure will slowly move northeast into the Appalachians tonight, with rain expected to come to an end over the Ohio Valley during the overnight hours.
Overall, poor flight conditions expected through the period as a large upper level low pressure system rotates through the area.
259 PM CDT Fri May 5 2017 Mid afternoon surface map shows 993 mb low pressure over northern WV while 548 dm 500 mb low was along the eastern TN/KY border. Strong NNW winds of 15-30 mph and gusts of 25 to 40 mph prevailed today, with strongest winds over eastern IL closer to low pressure system. 12Z forecast models lift strong low pressure and associated upper level low, into western PA/NY by 12Z/Sat, with pressure gradient weakening over CWA by early evening and NNW winds diminishing at sundown.
353 PM CDT Fri May 5 2017 (Tonight and Saturday) Dry northwest flow aloft in the Texas area will transition to upper level ridging by Saturday afternoon. This dry pattern will allow continued quiet weather with near normal, or slightly warmer than normal afternoon temperatures through Saturday evening. Lows tonight will be cooler than normal, but not as cold as we saw this morning, with some lows as cool as the upper 30s.
1248 PM CDT Fri May 5 2017 Benign weather pattern with a sharp upper level high pressure ridge over the southern Rockies this afternoon edging east over the southern high plains Saturday. /issued 346 AM CDT Fri May 5 2017/ Northwest flow aloft will continue today as a sharp upper ridge builds over the spine of the Rockies. Surface ridging this morning will be gradually replaced from west to east by a developing lee trough with winds turning southerly on the Caprock while light winds persist in the Rolling Plains. Temperatures will warm another increment today with highs mainly in the lower 80s. Heading into the weekend, a blocky trough-ridge-trough pattern across the lower 48 will keep synoptic features moving relatively slowly.
513 PM EDT Fri May 5 2017 Low pressure over western Maryland will track into northern Pennsylvania tonight, then linger over Ontario this weekend.
235 PM CDT Fri May 5 2017 19Z water vapor imagery shows an upper level ridge over the Rockies and into the Canadian plains with an upper trough just off the Pacific Northwest coast line. At the surface, weak ridging was noted throughout the southern and central plains with a weak low pressure system moved across northern MN. Northwest flow aloft and the weak surface ridging should maintain a relatively dry airmass with little in the way of forcing for ascent. So with favorable conditions for radiational cooling, have lows a few degrees cooler than MOS guidance especially in the river valleys.
/issued 1001 AM CDT Fri May 5 2017/ At 10 AM, the back edge of the departing upper level low is nearly bisecting the Mid-South, with the cloud edge just east of the Mississippi River. /issued 341 AM CDT Fri May 5 2017/ The occluded upper-level cyclone continues to move slowly east across the region early this morning. Rainfall amounts will remain on the low side across most of the CWA, but some areas in northwest TN could pick up another quarter inch. However, a weak cold front is progged to move south into northwest TN by Saturday afternoon, continuing south during the evening hours.
315 PM MST Fri May 5 2017 The strong high pressure system over the region weaken considerably tonight, as a new cold Pacific storm slowly approaches the region. A cold front will approach the area Saturday, developing very windy conditions region wide.
126 PM EDT Fri May 5 2017 An upper low brings unsettled and cooler weather through the weekend. Moist and cool cyclonic circulation around an upper low, centered to our northeast, will continue to affect our weather through at least Saturday night. Enough cold air aloft will even bring some wet snow to the higher elevations of the northern mountains later Saturday night.
Gusty north- northwest winds will decrease near sunset as diurnal mixing ends and high pressure encompasses the region. High pressure in place across the region resulting in mild and dry weather today.
1211 PM CDT Fri May 5 2017 A deep-layer cyclone over the TN Valley early this morning will gradually evolve into a full-latitude trough across eastern North America, while farther to the west, an amplified ridge will shift from the Interior West to the central part of the nation. The aforementioned, mid-level ridge will remain intact over the Great Plains through the weekend, yielding dry conditions and above normal high temperatures. A mid-level ridge will be maintained through the early to middle part of the upcoming week across the central and southern Plains, downstream from a subtropical-branch upper low meandering from the southwestern U.
Another cool and pleasant night in store for S TX tonight as a dry airmass and high pressure remain in place. Highs will also be a little warmer Sat.
1237 PM CDT Fri May 5 2017 Final push of the closed low is now beginning to work into the northwestern counties with clearing rapidly occurring about 2 counties west of this line. A few cooler spots, especially in the northeast may approach the upper 30s.
Winds will become westerly tomorrow and will eventually veer back around to the north Saturday night as a back door cold front moves southwest across the state. Can't completely rule out a stray rain shower along the back door cold front, but the frontal passage will likely come through dry with no upper level support to provide additional lift along the front. (ISSUED 638 AM CDT Fri May 5 2017 ) Upper level low pressure continues to exit the region at this time taking the majority of the mid to low level moisture with it.
1101 AM MDT Fri May 5 2017 Imagery shows ridge/trof pattern from west to east across the CONUS with upper high centered over nrn Mexico and the low in the trof centered over MS/AL. Upper level amplified ridging continues across the FA with weak mid lvl moisture moving through the flow with some minor mainly terrain induced cloud at times. Strong capping and moisture in this ridging case not really 'dirty' enough either for for afternoon convective POPs >= 15 percent this afternoon. with lows ranging from around 30 to the lower 40s. Otherwise, the upper ridge axis passes east of the FA by Saturday morning with a developing deep closing trof entering the wrn CONUS and increasing, but modest, mid lvl moisture beginning to stream into wrn WY Saturday afternoon/evening. SFC P will be lowering with weak trofs/boundaries around the region.
426 PM EDT Fri May 5 2017 Low pressure will track west of our area Overnight into Saturday.
208 PM EDT Fri May 5 2017 Strong low pressure moving into the Ohio River Valley will reach the Mid-Atlantic States tonight then lift farther north on Saturday.
203 PM EDT Fri May 5 2017 Aviation An area of low pressure will lift into the Eastern Great Lakes tonight with some lingering light rain for South Central and Southeast Lower Michigan today.
229 PM MDT Fri May 5 2017 Very strong upper ridge in place over the Rockies this afternoon and will continue to dominate the weather across the area through Saturday. Temperatures will be even warmer Saturday afternoon as 700 mb temps continue to warm with the ridge directly overhead. A few isolated thunderstorms may be able to develop over the higher terrain of the Snowys and Sierra Madres Saturday afternoon but would not expect much coverage due to the strength of subsidence aloft.