Aikyam-Lab/Synoptic-Bench huggingface dataset:
425 PM MST Fri Nov 25 2016 A ridge of high pressure over the Rockies will hold on for another 24 hours then exit to the east late Saturday and not return for the foreseeable future. Southwest flow aloft increases Saturday night in advance of a sharp upper level trough moving from Southern California to the Four Corners.
Have adjusted min temps a bit warmer in our eastern valleys on this account.
745 PM EDT FRI MAY 27 2016 A warm front will lift north of the area this evening. A weak cold front will cross the region on Saturday.
Chattanooga Airport, TN 65 89 65 89 / 10 20 10 20 Knoxville McGhee Tyson Airport, TN 61 86 65 85 / 10 20 10 20 Oak Ridge, TN 62 86 65 86 / 10 20 10 30 Tri Cities Airport, TN 59 84 60 83 / 10 20 10 40.
643 PM CDT FRI MAY 27 2016 Scattered rain showers and isolated thunderstorms pivoting around an upper level low pressure system are expected through the remainder of the afternoon and into early evening. For Saturday, the upper level low will push eastward, and with it any chances for rain showers will move out of the area. Temperatures reach up into the low to mid 70s across the entire CWA, making for a fairly pleasant start to the holiday weekend.
750 PM EDT FRI MAY 27 2016 High pressure will remain over the forecast area through tonight.
A cold front continues to slowly progress ENE across the area at this time.
Scattered rain showers and isolated thunderstorms pivoting around an upper level low pressure system are expected through the remainder of the afternoon and into early evening. For Saturday, the upper level low will push eastward, and with it any chances for rain showers will move out of the area. Temperatures reach up into the low to mid 70s across the entire CWA, making for a fairly pleasant start to the holiday weekend.
Dry weather is expected tonight under east coast ridging. The ridge is expected to persist today, with the local area on the nw periphery of the ridge.
/issued 407 PM CDT FRI MAY 27 2016/ Water vapor imagery shows an upper level low over the central plains with a trough extending into central Texas. The next disturbance rotating around the trough is interacting with daytime heating, rich gulf moisture, and high instability from residual cold pool and strong outflow boundary, from last night's and this morning's convection, to develop another mesoscale convective system. Upper level trough will begin to move off to the north on Saturday, however enough moisture and instability hanging around for scattered afternoon showers and thunderstorms.
Surface dew points are on the low side, near 70. On this date in Keys Weather History, 1894, the low temperature in Key West fell to 70 degrees.
activity over the ridges has dissipated as the low level flow weakened and the sun is setting. Overnight lows will be relatively warm in the mid to upper 60s and based on maximum dewpoints observed today after the lower levels were given plenty of time to mix, potential for any patchy fog looks minimal. Even warmer temperatures are forecast tomorrow as ridging pumps up further over the forecast area. Highs will range from the mid to upper 80s with dewpoints in the low to mid 60s.
Narrow ribbon of moisture/850-700 mb theta-e lifting north through southeast Michigan between 21-3Z but within the backdrop of rising 500 mb temps/upper level ridging. Tomorrow, the squeeze play will be on with the ridge to our east, as strong southerly upper level flow setting up over the Ohio valley extending to Gulf Coast States. and planning on carrying high scattered activity into the evening hours as height falls also begin to take place with the Southern Plains wave/trough moving into the Western Great Lakes Saturday Night.
1039 PM EDT FRI MAY 27 2016 High pressure will remain over the forecast area through tonight.
Storms near this boundary have showers some very weak rotation in the lower levels of the storm. This is in association with lift ahead of a weak mid-level trough rotating northeastward out of the Central Plains. General convergent/cyclonic flow with cooler air aloft is expected to continue likelihood of showers/isolated thunderstorms through the night.
VFR to persist through the TAF period as a weak upper level ridge passes across West Texas Saturday. /issued 644 PM CDT FRI MAY 27 2016/ Winds have begun to ease as a weak upper level ridge begins its pass across West Texas keeping us in VFR through the forecast period. /issued 353 PM CDT FRI MAY 27 2016/ Current WV imagery shows the axis of the upper low currently positioned overhead. The moisture won't be in place early enough to take advantage of a few possible disturbances moving around the upper ridge tomorrow so the forecast will continue to be free of mentionable PoPs. Aldrich Gulf moisture begins to come back into the area Saturday night as flow backs in response to the trough digging into the desert southwest.
as a ridge to the north begins to slide east and TD Number Two continues to move WNW.
Closed low rotating through the northern CWA currently, with showers and thunderstorms continuing across the NE counties, aided by diffluence aloft ahead of the incoming low. A relatively cold upper low was moving into west central Kansas this afternoon. Deep boundary layer moisture will be moving back into the high plains during the early part of the period.
Storms near this boundary have showed some very weak rotation in the lower levels. This is in association with lift ahead of a weak mid-level trough rotating northeastward out of the Central Plains. General convergent/cyclonic flow with cooler air aloft is expected to continue likelihood of showers/isolated thunderstorms through the night.
Mid/upper level closed low seen on water vapor sat pics over southwestern Manitoba/Turtle Mountains area this afternoon. Current convection in the form of scattered showers were in southern Saskatchewan/Manitoba and the northern tier of counties in North Dakota near the vicinity of the upper level low. Across our northern counties there is a potential for more vigorous showers/thunder with the cooler air aloft near the upper low. Tonight the upper level low is forecast to open and become diffuse with time as it lifts northward into northern Manitoba/Saskatchewan on Saturday. Meanwhile a large scale upper level low system over British Columbia today expands eastward tonight.
Isolated to scattered -SHRA and -TSRA are possible, but have kept out of the TAFs due to the low probability at KMSL or KHSV proper.
932 PM MDT FRI MAY 27 2016 Latest water vapor loop continues to show the upper level low continuing to shift east through the central plains. Upper low evident along the colorado/kansas border this afternoon with scattered showers and a few storms moving generally southward over much of the CWA.
644 PM CDT FRI MAY 27 2016 Winds have begun to ease as a weak upper level ridge begins its pass across West Texas keeping us in VFR through the forecast period. /issued 353 PM CDT FRI MAY 27 2016/ Current WV imagery shows the axis of the upper low currently positioned overhead. The moisture won't be in place early enough to take advantage of a few possible disturbances moving around the upper ridge tomorrow so the forecast will continue to be free of mentionable PoPs. Aldrich Gulf moisture begins to come back into the area Saturday night as flow backs in response to the trough digging into the desert southwest.
An upper trough rotating through the northern Rockies has pushed a weak cold front south through northern Utah this evening. Despite this ridging, lingering moisture coupled with daytime heating will allow for another round of afternoon and evening convection across much of the area.
919 PM PDT FRI MAY 27 2016 A deep marine layer and cool weather will continue this holiday weekend as weak low pressure over Southern California continues.
The latest RAP shows that this trough will move northeast toward Missouri and Illinois toward morning. Will keep going chance of showers and thunderstorms through the night ahead of the upper trough. GKS The threat for showers/storms will continue on Saturday and Saturday night as the negatively tilted upper level trough moves northeastward through the area.
1239 AM EDT SAT MAY 28 2016 A warm front will lift north of the area overnight. A weak cold front will cross the region on Saturday.
A low pressure system to our north was tightening pressure gradients across our area creating breezy to windy conditions which should persist into tonight.
913 PM EDT FRI MAY 27 2016 A warm front will lift north of the area this evening. A weak cold front will cross the region on Saturday.
Weak ridging aloft will move into Colorado for Saturday with weak subsidence. The upper low continues to lift east into Kansas and Nebraska, with wrap around moisture continuing the showers and thunderstorms over the area. On Saturday, slight upper ridging will allow for warm advection, allowing for max temperatures to warm into the 60s and lower 70s for the plains. Weak troughing over the plains will produce light southeasterly winds over the plains, which will help focus the showers up near the Cheyenne Ridge.
Given all the low level moisture. Some weak low level ridging will develop across southern portions of the state on Saturday.
Past midnight any precip should remain limited to the coast as low level E/NE flow between ridge to the north and newly formed TD 2 well east of the area, continues to transport isolated to scattered showers onshore. Newly formed TD 2 well east of the waters and ridge to the north will continue a E/NE flow over the waters tonight, around 10 to 15 knots.
551 PM MDT FRI MAY 27 2016 Upper low evident along the colorado/kansas border this afternoon with scattered showers and a few storms moving generally southward over much of the CWA.
606 PM CDT FRI MAY 27 2016 Upper trough is currently extending from southwest Neb to central KS, and will lift northeastward squarely across the forecast area very late tonight and Saturday. Later tonight ahead of the aforementioned upper trough, thetae advection increases again and lingers through the day Saturday as the trough moves through. On the backside of this low, thetae ridging is pretty persistent, so would not rule out pockets of heavy rainfall, especially noting light mid level winds, generally throughout the eastern half of our area east of the James River valley. That said, the warm cloud depth is relatively shallow and the low level dew points are not excessively high.
Satellite visual imagery places a low pressure center and upper level trough churning over the Northern and Canadian Rockies this evening producing a strong southwest flow aloft over Western and Central Montana. A weak low centered over Southern Manitoba is pushing a cold front into Nemont while the western trough is sending another cold front into the local area. A meso Ridge runs north from northeast Montana through western Saskatchewan while a large trough stretches north from Washington up through the British Columbian coast. This afternoon through Saturday: the remnants of a closed low from yesterday and left over moisture moving in from the northeast has allowed some showers and thunderstorms to form over the northeastern third of the CWA. To the west an upper level cold front has formed over western Montana.
623 PM CDT FRI MAY 27 2016 Convection has erupted again across the central part of the country in association with an upper level low currently crossing the Central Plains. The lowest cigs are expected in the KACT area where an IFR deck is likely after midnight, while MVFR cigs and light fog will be forecast for the Metroplex during the overnight hours. If an isolated storm were to form on the dryline it would most likely occur near the Red River, closest to the departing upper low.
643 PM EST Thu Feb 9 2017 Snow showers will continue through the afternoon before high pressure begins to move over the region and dry conditions resume overnight. Warmer temperatures and rain chances return for the weekend. However, upslope flow will continue to create accumulating snow showers in the ridges into the evening hours. Here, snow will begin to shut off around midnight as surface ridging increases.
519 PM EST Thu Feb 9 2017 Cool high pressure building into the region tonight will move off the coast Friday afternoon.
The weekend looks cooler again with temperatures dropping back closer to normal. Sensors showed winds decreasing in the Owens Valley, but would prefer to leave the High Wind Warning in place as conditions are still favorable for bursts of downslope winds through the night.
655 PM EST Thu Feb 9 2017 High pressure will push east across the region tonight into Friday.
Northerly winds around 10 mph behind the cold front will continue to drag cooler/drier air into the area overnight. Skies will remain clear, with temperatures falling into the mid to upper 40s over much of the interior, while low level flow veering to the northeast late tonight should prevent lows from dropping below the low to mid 50s along the coast.
/BB/ Tonight through Friday: Polar high pressure is making a rare appearance in the ArkLaMiss as we go through the near term. Have kept most locations above freezing but it would not be surprising if we get more decoupling of the boundary layer than anticipated. As we go through Friday, a warm- up will commence under mostly sunny skies with high pressure shifting east and southwest low-level flow developing.
High pressure will build in from the Ohio Valley late tonight and early Friday, bringing fair weather and diminishing winds. A warm front will approach from the Great Lakes later Friday, bringing increasing clouds and the chance of light snow over the northern counties. Blustery and cold conditions are in store for the region tonight, as pres gradient remains fairly tight between intense low east of New Eng and high pressure moving into the Ohio Valley. However, a warm front lifting through the eastern Grt Lks should spread increasing clouds across the region later in the day.
954 PM EST Thu Feb 9 2017 Cold high pressure will build overhead tonight, then shift offshore Friday. Expect lows will generally be in the lower to mid 20s. High pressure will move offshore during the day Friday. As such, lows Fri night will be 10F+ warmer than tonight, in the mid 30s.
As onshore flow becomes established, moisture in the low levels should return, and eventually look for MVFR ceilings to develop from mid-day to late afternoon, likely arriving at coastal sites first. Otherwise, look for winds up around 10 knots and occasionally gustier in the afternoon as developing low pressure east of the Rockies will keep that pressure gradient a little tighter. /ISSUED 338 PM CST Thu Feb 9 2017/ At 3 PM, high pressure was centered over the mid Mississippi valley. Temperatures will be a few degrees warmer than today as warm air advection ensues.
A strong cold front moving through the region combined with a deep plume of moisture will continue to result in widespread rainfall through the afternoon and evening.
423 PM MST Thu Feb 9 2017 Upper level analysis has broad ridge across the western CONUS with closed low just off the Pac NW coast. Upper ridge will flatten as a weak wave moves along the southern Canadian border. Upper ridge continues to flatten and shift east. Another very mild day on tap, however it may be another tricky temperature forecast with a cold front moving in during the day. Lows Friday night will be near freezing.
High pressure will slide eastward from W KY now to W NC by daybreak. The powerful upper level trough that moved across our area yesterday will continue to push eastward through the rest of today and tonight. In the wake of the cold front that has moved well southeast of our area, we will remain under northerly/northwesterly flow, with dry and cooler air continuing to funnel into our area.
336 PM MST Thu Feb 9 2017 High pressure continues over the southwestern CONUS this evening, with another record high reached in Grand Junction as of 330pm this afternoon. A few high clouds will spill over the ridge axis and across the central and northern portions of Utah and Colorado through the afternoon and evening hours. Surface temperatures will be warm enough for rain in all but the highest mountain locations over 10,000ft.
BMickelson Previous short term discussion: A warm front continues to push across northeast Montana this afternoon with areas of freezing rain continuing in the northeast zones. Temperatures are rising above freezing and will continue to do so further east this evening. Expect clearing skies on Friday and warmer high temperatures for most places thanks to efficient boundary layer mixing.
Confidence remains high that much warmer temperatures will spread across the region on Friday as westerly downslope effects boost daytime highs.
1040 PM EST Thu Feb 9 2017 High pressure will build into the area through Friday.
927 PM CST Thu Feb 9 2017 Breezy/windy south to southeast winds will remain through the night across the east as warmer air pushes in across all of the cwa. Warmer air is pushing into the region this afternoon thanks to gusty southerly winds. WAA, along with upper level ridging will cause temperatures to become steady, or slowly rise tonight. An area of low pressure crossing southern Canada on Friday will shift the winds to a west-northwest direction.
931 PM CST Thu Feb 9 2017 Breezy/windy south to southeast winds will remain through the night across the east as warmer air pushes in across all of the cwa. Warmer air is pushing into the region this afternoon thanks to gusty southerly winds. WAA, along with upper level ridging will cause temperatures to become steady, or slowly rise tonight. An area of low pressure crossing southern Canada on Friday will shift the winds to a west-northwest direction.
Eventually later this evening, these winds should continue to diminish as the low continues to weaken. As cooler temperatures move inland, we are expecting snow along the Cascade range during Friday. As the trough to the south passes late Friday evening, high pressure will gradually begin to build into the weekend bringing rather pleasant weather.
With temperatures expected to remain above freezing all night with areas of rain and significant snowmelt occurring, we have issued a Flood Advisory for much of southwestern Montana through mid-morning Friday. and brief freezing rain or snow. A weak front may also bring a brief period of rain and freezing rain to the Helena Valley this evening.
/issued 355 PM CST Thu Feb 9 2017/ High pressure centered to the north of the area today has allowed for plenty of sunshine and pleasant conditions. Unfortunately, the progressive nature of this high means that change is in the works in relatively short order as winds will veer back to the southeast and then south overnight tonight into Friday morning bringing with it increasing moisture and cloud cover.
740 PM CST Thu Feb 9 2017 Winds are light across the Mid-South this evening and will continue to veer around to the southeast overnight as the surface anticyclone over the Ohio Valley shifts east. Temperatures will rebound tomorrow afternoon, warming into the low/mid 60s across much of the area.
These gradients are expected to relax this evening as a surface pressure ridge builds temporarily over Eastern Conus. No precipitation is anticipated for tonight into Friday thanks to said ridge. As high pressure shifts to the east Friday morning, winds will shift to the east and then southeast, increasing to 5-7kts by Friday afternoon. However, with lower winds under high pressure we should not reach red flag criteria.
824 PM CST Thu Feb 9 2017 Predom clr and cooler conditions have developed across the cntrl TN Valley this Thu evening, as a strong dome of high pressure begins to work its way ewd across the TN/OH Valley regions. This flow, along with higher thickness values and plenty of sun should produce notably warmer temperatures, with highs warming into the mid 50s to around 60. The above noted upper low will weaken and become involved in polar jet during Friday, while another low to the south forms.
Thus, temps to remain just a few degrees above current dewpoints in the lower to mid 30s and overnight lows in the mid 30s over sw ar to the mid 40s over east tx appear reasonable. Combined with flat upper ridging, temperatures should continue to quickly warm into the lower 70s with dry weather prevailing. During the weekend, a southern stream upper trough will become cutoff over Northern Mexico.
534 PM CST Thu Feb 9 2017 An upper level ridge will keep the quiet weather in place this evening and overnight. At the surface, North and Central Texas will be between a high pressure ridge over the Southeast CONUS and a developing lee side trough. The lee trough will strengthen overnight and Friday as an upper level trough approaches the West Coast. The southerly flow will advect warmer air with temperatures in the 70s/low 80s.
Chattanooga Airport, TN 26 58 43 64 / 0 0 0 20 Knoxville McGhee Tyson Airport, TN 23 58 42 62 / 0 0 0 20 Oak Ridge, TN 22 56 42 60 / 0 0 0 20 Tri Cities Airport, TN 17 53 38 60 / 10 0 0 20 TN.
725 PM EST Thu Feb 9 2017 Cool high pressure building into the region tonight will move off the coast Friday afternoon.
The weekend looks cooler again with temperatures dropping back closer to normal.
428 PM MST Thu Feb 9 2017 Updated Aviation section High pressure continues over the southwestern CONUS this evening, with another record high reached in Grand Junction as of 330pm this afternoon. A few high clouds will spill over the ridge axis and across the central and northern portions of Utah and Colorado through the afternoon and evening hours. Surface temperatures will be warm enough for rain in all but the highest mountain locations over 10,000ft.
837 PM EST Thu Feb 9 2017 High pressure will end snow showers and return dry weather overnight. Warmer temperatures and rain chances return for the weekend. The lower temperatures led to advisory-level wind chills in Garrett and eastern Tucker Counties, and so issued a headline there.
448 PM MST Thu Feb 9 2017 00Z TAF CYCLE Surface lee trough with strengthening wly mt top winds through 11/00Z.
Strong high pressure will lead to unseasonably warm weather through Friday, with increasing southwest winds Friday afternoon ahead of an approaching weather system. A period of active weather is forecast for this weekend as a low pressure system brings cooler temperatures, rain and some high elevation snow to northern Arizona.
710 PM EST Thu Feb 9 2017 Cool high pressure building into the region tonight will move off the coast Friday afternoon.
Warmer air is pushing into the region this afternoon thanks to gusty southerly winds. WAA, along with upper level ridging will cause temperatures to become steady, or slowly rise tonight. An area of low pressure crossing southern Canada on Friday will shift the winds to a west-northwest direction.
625 PM EST Thu Feb 9 2017 Cold high pressure will build overhead tonight, then shift offshore Friday. Lows generally in the lower to mid 20s expected. High pressure will move offshore during the day Friday. As such, lows Fri night will be 10F+ warmer than tonight, in the mid 30s.
652 PM CST Thu Feb 9 2017 All metar reports so far reporting -sn as warmer air lagging behind current radar returns. Upper heights already starting to rise as ridging starts to build into the Western Plains. However, current timing seems to clear the western edge of the precipitation just as the warmer air moves in. Think there could be some sleet mixing in as the precip exits the area, but at this point unless warm air moves faster than expected, freezing rain is less likely. Strong southerly winds on the front side of the low pressure system will bring some blowing snow, mainly in the northern Red River Valley where there will be both a decent snowpack and falling snow.