Aikyam-Lab/Synoptic-Bench huggingface dataset:
Strong offshore flow at the ridge top level is in place this morning with the strongest winds in the southern coastal ranges. This post frontal gradient will weaken as the upper low that pushed the mostly dry front through yesterday continues to slowly move east. The thermal trough will deepen slightly into Monday morning, but the pressure gradient will have a net decrease with the high pressure east of the Cascades weakening, and the easterly winds will decrease with the decreasing gradient.
A deep upper trough will dig over the region today and Monday bringing unseasonably cold temperatures. With Canadian high pressure building in at the sfc, drier conditions are expected, as well. Not much change in the extended which features a semi-permanent longwave trough overhead with two surges of arctic air featuring 850mb temperatures around 2-3 standard deviations below climo. Additionally, the high pressure centers travel over the Rockies, and being on the periphery means we will occasionally see some light mixing winds overnight.
The upper trough stretches across the northwestern CONUS, with a 110 kt jet streak moving over SD. Similar, possibly slightly warmer temperatures are expected for Monday ahead of the next system. Main energy with this system will be to the south of our area as flow splits and the upper low closes off over UT.
Upper level trough takes shape across the Western states causing surface pressures to fall across the Plains allowing for southerly winds to strengthen leading to warmer temperatures today. The warming trend continues Monday, however temperatures may be a cooler across northern parts of our area if the front moves in there.
The cold front has completed its passage across the CWA, with mostly cloudy/overcast conditions reestablished in the cold advection behind the boundary.
A cold front will move across the area today causing winds to shift to the north. /issued 321 AM CDT Sun Oct 27 2019/ Cold fronts and potential for wintry precip main concerns this week. Another nice day anticipated across much of Oklahoma and western north Texas today, exception being northwest Oklahoma, which will be to the north of the advancing cold front for much of the day. Could see a light wintry mix on the north edge of the precip across northern Oklahoma, where sfc temps cool to just below freezing. Quickly on the heels of this system, a larger longwave trough begins to influence the area.
655 AM CDT Sun Oct 27 2019 A cold front will push southward across central Kansas this morning and looks to stall out near the Kansas Turnpike corridor, then resume its march southward across southeast Kansas tonight. Could be some dry air to overcome in the low levels therefore only expecting light snow accumulations (less than an inch).
Slippery roads are likely for the passes and higher valleys along the Divide but even the lower valleys of western Montana may see a period of snow covered roads.
Unsettled conditions will return mid week as another low pressure system moves through the area. Cold front has pushed east through the forecast area and continues to push east through the Coastal Plain. Upper ridge offshore southeast U. Drier air across central SC and east central Ga, so expect a dry day and strong insolation resulting in above normal temperatures again with highs in the low 80s. Expect cloudiness to increase and a few light showers after midnight with lows mainly in the low to mid 60s.
320 PM CDT Sun Oct 27 2019 (Tonight and Monday) As of 2 PM, a cold front was located just south of a Lubbock to Childress line.
/issued 1050 AM CDT Sun Oct 27 2019/ High pressure has settled over the Mid-South this morning. Today's forecast highs are on the low end of model-blended guidance. Upper level energy will dive south from western Canada, helping to carve out a broad longwave trof over Rockies early this week. Southwesterly flow will prevail downstream of this trof, across the Midsouth on Monday.
Tonight - Monday: A cold front moved through earlier in the day but the colder air is lagging behind the surface front.
339 PM CDT Sun Oct 27 2019 The cold front has moved through all but the far southeast counties this afternoon. Air temps should remain well above freezing so no concern about wintry precip at least tonight. By Monday the upper low now across the Great Basin will quickly eject east into the region. A brief period of patchy light drizzle or freezing drizzle may persist as we lose the deeper moisture but most areas should see dry conditions by sunrise Tues.
A gusty west to southwest wind will develop behind the front bringing drier and cooler air into the region. High pressure will build in early in the upcoming workweek. A new area of low pressure is likely to track just west of Pennsylvania late in the week. Min temps early Monday will range from the upper 30s in the west, to mid and upper 40s in the Lower Susq Valley. * May be a stormy Halloween followed by colder weather with the first mix of snow across the higher elevations Nov.
346 PM EDT Sun Oct 27 2019 High pressure will move across the area tonight and continue off to the east on Monday.
As the low level cold air advection wanes, expect the gusts to drop off. The cool temperatures will be the story through much of the week with large upper level trough across the northern half of the country.
Low temperatures tonight should range from the lower 40s behind that front to the upper 40s across south- central Missouri. The lowest confidence area will extend roughly along a Neosho to Springfield to Rolla line. A few models indicate potential for a brief transition to freezing drizzle across portions of extreme southeastern Kansas and west- central Missouri as temperatures fall to the freezing mark.
This line is slightly ahead of the actual cold front, which at 18Z stretched roughly from Waycross, GA southwest to Keaton Beach, FL as seen in the tight dewpoint gradient in the surface obs. The coolest air won't make it quite into the area however, with temperatures only dipping to the low-mid 60s in SE GA and low 70s in NE FL.
High pressure and offshore flow will result in dry weather with mostly clear skies and cool temperatures this week.
/Issued 738 AM EDT Sun Oct 27 2019/ A drier/cooler airmass moves in behind this front but it will only stay over the area for 24 to 36 hours before next system moves in.
337 PM CDT Sun Oct 27 2019 A cold front continues to advance across Oklahoma and western north Texas this afternoon, although more slowly than earlier today. It will get a boost tomorrow, as another surge of cooler air arrives in the southern Plains.
1254 PM CDT Sun Oct 27 2019 At 08Z, a cold front had advanced to near Liberal, Great Bend KS and St. These snow chances will continue as a positively tilted trough extending from eastern MT into Nevada advances into North Dakota through Utah tonight. On Monday, the upper trough axis will cross western Nebraska. Behind the trough axis, clearing skies should return from west to east in the afternoon. A strong upper trough, currently across the eastern half of Northwest territory, Canada, will drop through Montana into Idaho and Wyoming Monday night.
High temperatures remain on track to only reach the lower 30s for the Devils Lake basin with mid to upper 30s elsewhere. For that reason, will remove the low precipitation chances across west central Minnesota early this morning. The cold front has passed east of the FA, with steady northwest winds in its wake. Winds should be lower on Monday, but it will be a continuation of the cold, with highs again in the low to mid 30s.
Lingering stratus across the northern and western portions of the forecast area associated with a thermal trough axis has been slower to burn off than previously expected. This has resulted in cooler temperatures, and have adjusted daytime highs down a few degrees due to the slower burn off of the cloud cover. Still expect to see the thermal trough axis shift to the east by this afternoon allowing for increased boundary layer mixing and eventual burn off of the cloud cover during the afternoon hours.
231 PM MDT Sun Oct 27 2019 An upper trough across the northern Plains through the Great Basin continues its slow eastward push.
1117 AM EDT Sun Oct 27 2019 A strong subtropical high pressure center between Hispaniola and Bermuda will expand westward through Monday, with a ridge axis now in the process of strengthening across the Florida Peninsula. 850 mb temperatures will rise slightly to between 19C and 20C on Monday, which will provide added convective inhibition in the low-level air mass.
Dry conditions and near normal temperatures will persist into tonight and Monday, followed by periodic chances for rain and cooler temperatures mid to late week as a large low pressure system moves through the region. Tranquil wx and near normal temps are expected into tonight and Monday as the area becomes situated in light southwest flow between high pressure working east through the Eastern OH Valley and a sfc cold front approaching from the west.
Gusty winds are expected to mostly subside, except at the higher elevation in the Siskiyous, where stray gusts may linger. Strong offshore flow at the ridge top level is in place this morning with the strongest winds in the southern coastal ranges. This post frontal gradient will weaken as the upper low that pushed the mostly dry front through yesterday continues to slowly move east. The thermal trough will deepen slightly into Monday morning, but the pressure gradient will have a net decrease with the high pressure east of the Cascades weakening, and the easterly winds will decrease with the decreasing gradient.
248 PM MDT Sun Oct 27 2019 Upper trough over the area will continue to keep the area under a winter-feel as temperatures will remain roughly 20 degrees below normal. Another cold front will drop south into the area late tonight, bringing a round of snow showers. The upper trough then will begin to move east as the NW flow opens up, bringing in a weak upper ridge followed by another disturbance later in the week. TFJ FLIGHT CATEGORY: VFR/MVFR WINDS: NW winds diminish into this evening, then increase Monday behind a cold front.
Tonight brings continued cooling with low temperatures falling into the lower 20s to upper teens. High temperatures will reach the lower to middle 30s.
Dry conditions and near normal temperatures will persist into tonight and Monday, followed by periodic chances for rain and cooler temperatures mid to late week as a large low pressure system moves through the region. Tranquil wx and near normal temps are expected into tonight and Monday as the area becomes situated in light southwest flow between high pressure working east through the Eastern OH Valley and a sfc cold front approaching from the west. This sfc front may ease into far nw IN/sw MI on Monday with low clouds and cooler temps (highs in the 50s) compared to partly sunny and warmer low-mid 60s elsewhere. An active baroclinic zone will settle east into the Midwest and Great Lakes downstream of a deepening Western US upper trough this week.
1134 AM CDT Sun Oct 27 2019 A cold front will push southward across central Kansas this morning and looks to stall out near the Kansas Turnpike corridor, then resume its march southward across southeast Kansas tonight. Could be some dry air to overcome in the low levels therefore only expecting light snow accumulations (less than an inch).
1246 PM CDT Sun Oct 27 2019 Today and tonight will be decidedly cooler than yesterday. There are 2 main systems as two PV anomalies rotate through the base of the main trough across the middle of the country.
otherwise a delightful late October morning ongoing across the forecast area thanks to cool high pressure dominating our regional weather map.
1224 PM CDT Sun Oct 27 2019 A cold front will pass through the region with low clouds and northwest winds developing behind it. Looking ahead, Monday will be cooler as well under cloudy skies. Early morning satellite imagery with surface obs showed a strong cold front across the region.
/issued 641 AM CDT Sun Oct 27 2019/ Cold front has just moved through AMA and will continue to move south through the area this morning.
High pressure over the lower MS vly to keep winds lgt and vrbl overnight into tomorrow. otherwise a delightful late October morning ongoing across the forecast area thanks to cool high pressure dominating our regional weather map.
Unsettled conditions will return mid week as another low pressure system moves through the area. Cold front has pushed east through the forecast area and continues to push east through the Coastal Plain. Temperatures will be warmer than normal with highs in the upper 70s to low 80s. Lows will mainly be in the low to mid 60s.
350 PM CDT Sun Oct 27 2019 Mid-afternoon sfc analysis shows high pressure centered from the Ohio Valley swd through the lower Mississippi Delta with low-level flow gradually shifting to a more serly direction. Although certainly warmer than 24 hours ago, temps remain slightly below late October normals thanks to our cool start this morning when the cool high was parked nearly overhead. As we move through Monday into Monday night, an inverted trof/erly wave aloft is progged to push wwd across the ern Gulf around the wrn Atlantic ridge, combining with increasing moisture through the column to produce scattered showers mainly over the coastal waters, but possibly into lower Acadiana late Monday night.
235 PM CDT Sun Oct 27 2019 A cold front had already moved through the region this morning shifting winds to the north along with much cooler temperatures than observed yesterday. This low stratus will make a bigger push tonight as colder air moves into the region. At the same time, a short wave located in the Intermountain West will rotate around a larger upper level trough. Surface ridging will slowly move into the Central Plains on Monday.
1233 PM CDT Sun Oct 27 2019 A cold front continues to move south this afternoon.
Most locations have the chance to see some snowflakes through the end of the day, as the aforementioned trough is moving quite slowly to the east. On Monday, a clipper will move through the region, with another cold front and continued cold air advection keeping high temperatures in the upper 20s to mid 30s.
Although the stratus deck will begin to degrade some by late tomorrow morning, enough moisture will remain in the low levels to support at least some broken to scattered low level could cover through Monday afternoon. The low clouds should help temperatures remain below the 70 degree mark areawide once again. This will keep dry weather in the forecast and temperatures in the lower to mid 70s for highs.
Not optimal radiational cooling conditions, but will be on the chilly side with lows in the lower-mid 20s most areas. Cold upper trough remains in place across central Canada and the northern Plains through much of the upcoming week, leading to a prolonged stretch of well below normal temperatures as we head into November at the end of the week. Confidence in precipitation chances is quite a bit lower, with models lacking run-to-run or model-to-model consistency in strength, track/timing of any waves rotating through the base of the main trough.
1050 AM CDT Sun Oct 27 2019 High pressure has settled over the Mid-South this morning. Today's forecast highs are on the low end of model-blended guidance. Upper level energy will dive south from western Canada, helping to carve out a broad longwave trof over Rockies early this week. Southwesterly flow will prevail downstream of this trof, across the Midsouth on Monday.
Although the high pressure center will remain well off to the west, the pressure gradient will slacken. A trough will approach the region on Monday, switching winds to a west/west southwest direction. This dry surface flow along with warm air advection justified a Monday afternoon high temperature forecast a few degrees warmer than baseline guidance.
High pressure over the area through Monday will result in dry conditions and seasonal temps. Changes begin late Monday night as persistent upr ridge off the Florida east coast sends Gulf moisture north across the area. Min temps Monday night will be quite a bit warmer than tonight for most areas, as a result of the increased moisture and cloud cover.
The cold front and wind shift has moved through the TAF sites. /issued 337 PM CDT Sun Oct 27 2019/ A cold front continues to advance across Oklahoma and western north Texas this afternoon, although more slowly than earlier today. It will get a boost tomorrow, as another surge of cooler air arrives in the southern Plains.
/issued 235 PM CDT Sun Oct 27 2019/ A cold front had already moved through the region this morning shifting winds to the north along with much cooler temperatures than observed yesterday. This low stratus will make a bigger push tonight as colder air moves into the region. At the same time, a short wave located in the Intermountain West will rotate around a larger upper level trough. Surface ridging will slowly move into the Central Plains on Monday.
500 PM MDT Sun Oct 27 2019 An upper trough across the northern Plains through the Great Basin continues its slow eastward push.
Another cold front will make its way through the region late tonight and tomorrow morning, bringing a quick hit of snow showers and another shot of cold air. Tomorrow night should be colder than last night (where lows were generally within a few degrees of 20), as we dip into the lower 10s.
700 PM EDT Sun Oct 27 2019 High pressure over the Ohio Valley will build into Pennsylvania early in the upcoming workweek.
A weather system brushing the area will bring gusty winds this afternoon followed by cooler temperatures and a slight chance of showers in the White Mountains on Monday.
Skies are mostly clear over the region this evening due to extremely dry air that moved in behind the upper level trough and accompanying cold front yday.
The cold front associated with this deep trough continues to progress south as well, showing a stark contrast in temperatures across the forecast area.
Surface through mid level ridging remains aligned across the Florida Peninsula somewhat drier lower levels is advecting in across the Keys. Short Term Update - Gentle to moderate east to southeast breezes will continue across the Florida Keys through the overnight period due to the nearby ridge to the north and the trough off to our southwest. High pressure just north of the Keys and a trough near the Yucatan will maintain gentle to moderate east to southeast breezes across Keys waters overnight. Isolated showers may develop during the overnight hours over the Florida Straits and move northwest, likely staying south of the Lower Keys.
927 PM EDT Sun Oct 27 2019 High pressure will move across the area tonight and continue off to the east on Monday.
In large part, this is due to the strong upper level ridge that has been parked over much of the Florida peninsula for some time now. The front is expected to remain fairly stationary overnight, but will begin to lift back northward tomorrow as a warm front.
741 PM EDT Sun Oct 27 2019 High pressure will move across the area tonight and continue off to the east on Monday.
Temperatures are a bit warmer than this time last night with most of the region seeing temps anywhere from the upper 50s-low 60s.
340 PM MDT Sun Oct 27 2019 Snow band from west of Scottsbluff to Horse Creek and Albany that produced heavy snowfall from Rawlins to Douglas and east along the Pine Ridge earlier continued a slow drift southward. The next upper level disturbance is progged to arrive from the northwest as early as Monday night, accompanied by a closed upper level low. This indicates that this system is rapidly evolving, and common with closed low pressure systems, erratic and difficult to forecast.
Dry weather through this week with an upper level ridge offshore.
1008 PM EDT Sun Oct 27 2019 High pressure over the Ohio Valley will build into Pennsylvania early in the upcoming workweek.
Cold front making steady progress through NE OK this evening but is expected to slow tonight as it encounters the higher terrain of far NW AR and far SE OK.
A strong but dry weather system will continue to move across California through this evening bringing strong winds into the central Sierra mountains and foothills along with cooler temperatures.
Gusty east to northeast ridgetop winds will continue to slowly wind down through the rest of today, while critical fire weather conditions persist across portions of southeast Humboldt, southern Trinity, and interior Mendocino counties. Otherwise, an upper ridge centered offshore will favor mild and dry weather during the next seven days. As such, canceled the High Wind Warning and replaced it with a Wind Advisory that ends at 5 pm this afternoon. Upper-level ridging will continue to build toward the West Coast over the next day or so. Low temperatures may dip to near or below freezing in some of the colder interior valleys during the next few days.
507 PM MDT Sun Oct 27 2019 Snow band from west of Scottsbluff to Horse Creek and Albany that produced heavy snowfall from Rawlins to Douglas and east along the Pine Ridge earlier continued a slow drift southward. The next upper level disturbance is progged to arrive from the northwest as early as Monday night, accompanied by a closed upper level low. This indicates that this system is rapidly evolving, and common with closed low pressure systems, erratic and difficult to forecast.
339 PM MDT Sun Oct 27 2019 This afternoon, the upper level trough axis extended from northwest Wyoming to northeast NV, with northwest CO under the right entrance region of a 140 kt jet. A pretty strong mean upper trough continues to dig to our west.
Cold air advection behind today's cold front will result in a colder night than last night. Portions of northwest Oklahoma will reach freezing temperatures (and lower). The cold front and wind shift has moved through the TAF sites. /issued 337 PM CDT Sun Oct 27 2019/ A cold front continues to advance across Oklahoma and western north Texas this afternoon, although more slowly than earlier today. It will get a boost tomorrow, as another surge of cooler air arrives in the southern Plains.
These snow flurries will continue as a trough moves across the Northern Plains. Tonight brings continued cooling with low temperatures falling into the lower 20s to upper teens. High temperatures will reach the lower to middle 30s.
545 PM EDT Sun Oct 27 2019 High pressure over the Ohio Valley will build into Pennsylvania early in the upcoming workweek.
Early morning satellite imagery showed a positively tilted trough out to the west. Later today an area of positive vorticity will track northeast along the leading edge of this upper level trough, and 500mb height falls together with weak mid-level frontogenesis will lead to rising air, clouds, and precipitation development, generally east of I-35.
443 AM EDT Mon Oct 28 2019 Temperatures this morning are in the lower 80s across the island chain, with the usual 'cool' spot, Big Pine Key, near 80 degrees. Key West radar is detecting widely scattered showers across the Lower Keys and surrounding nearshore and offshore waters, with isolated showers across the eastern half of the region.
246 AM MDT Mon Oct 28 2019 A broad trough covers the western and central states, with its axis stretching from Manitoba through southern CA. Meanwhile, a Canadian low will dive into the northern plains, and its associated cold front will approach the region. Behind the cold front, strong CAA and pressure rises of 3-4 mb/3 hrs will support breezy northerly winds.
With a fetch region void of warmer air and mid level temps in the lower half of climatology, we'll see another chilly afternoon with highs topping out in the 30s for most. By the afternoon, a vort max, currently evident on WV imagery over the desert SW, ejects out of the base of the main upper level trough and tracks toward eastern NEB and western IA. Overnight temperatures again bottom out in the lower 20s. Dry conditions expected for Tuesday although with the region still under the influence of the broad upper level trough, well below normal temperatures continue.
A cold upper level trough will move southeast across Utah through tonight.