Aikyam-Lab/Synoptic-Bench huggingface dataset:
352 PM EST Sat Jan 14 2017 A ridge of high pressure will move off the New England coast overnight. An upper trough will move southeast from Canada overnight and will bring a slight chance of snow showers to the Adirondacks and Green Mountains after midnight and early Sunday morning.
257 PM CST Sat Jan 14 2017 A strong temperature gradient is across the mid state this afternoon thanks to the cold front that stalled just south of the area a few days ago, and warm air now forcing the boundary back to the north.
An upper ridge and light winds will keep a cold dry air mass over Western Washington today and Sunday, for sunny days with highs in the upper 30s to mid 40s. It will be below freezing again tonight.
312 PM CST Sat Jan 14 2017 Earlier update had removed the Ice Storm Warning for a few counties in northeast OK and replaced with a Freezing Rain advisory as 32F line has held steady from north of Pryor to Tulsa to northern Creek county. with surface temperatures expected to rise just a hair above freezing by this evening. A large area of freezing rain has blossomed across much of western and northwestern OK. Surface temperatures will warm above freezing by Sunday morning. in advance of a strong upper cyclone moving into west TX.
/Tonight through Sunday/ Mid-level clouds moved across southern Iowa this morning and afternoon as high pressure and drier air moved into the northern part of the state. This drier air will remain overnight as the trough of low pressure over Baja California begins to lift to the northeast. Low temperatures tonight will range from the single digits over northern Iowa where skies will be mainly clear to the low 20s over southern Iowa as clouds spread northward.
1210 PM CST Sat Jan 14 2017 Given reluctance of surface temps to warm above 32 degrees primarily in our E-NE zones, have opted to extend the freezing rain advisory through 6 PM in these areas as additional light glazing is likely on unpaved surfaces. Lift in this area is receiving enhancement via a N-S baroclinic zone sampled by 12Z RAOBs, but this Fn layer is progged to migrate westward this evening and overnight in response to height falls bulls-eyeing to our west ahead of tomorrow's vigorous upper cyclone. Continued LIFR through Sunday with occasional freezing drizzle and freezing rain and CDS, less so at PVW and only rain with some TS at LBB. Freezing Rain Advisory until noon CST today for TXZ029-035-036- 041>043. Freezing Rain Advisory until 6 PM CST this evening for TXZ023>026-030>032-037-038.
A developing lee side trough will help weaken the influence of a lingering arctic airmass today, resulting in warming temps. Gilchrist Previous short term discussion: Split flow pattern continues with closed low over Baja California moving inland through the weekend. To the north a series of shallow ridges and trofs will be moving across the Canadian Rockies. Poor mixing anticipated through the weekend with ridge sliding east across the region but should continue to see some moderation of temperatures.
Combination of a subtle little surface trof and a brief jet couplet has generated a small area of moderate snow in NEPA this afternoon.
344 PM CST Sat Jan 14 2017 (Tonight and Tomorrow) A warm front along the Interstate 10 corridor this afternoon will lift to the north overnight and should be in the vicinity of Interstate 20 by sunrise tomorrow and over the northern Big Country by noon. An upper low over the central Baja this evening will move eastward overnight and should be moving over far West Texas by noon tomorrow. Highs tomorrow will range from the lower 60s over the Big Country to the upper 60s over the southern half of the forecast area. Following the exit of the upper level trough tomorrow night, a cutoff low will develop southwest of the area in western Mexico.
827 AM PST Sat Jan 14 2017 Northeast winds will bring drier and warmer weather today, with more sun. Slightly cooler on Sunday with more cloud development, followed by a high pressure ridge aloft for fair, dry and warmer weather into midweek. Some patchy fog was reported in some areas, including the high desert. A few isolated showers still not out of the question far eastern portions of the forecast area into this evening as some moisture wraps westward around the low to the south, but pops are below 15 percent. It will be warmer today with the added sun and the drying associated with offshore flow, then a bit cooler tomorrow with more clouds expected.
Temperatures will continue to hover near or below freezing, so rain and freezing rain will present an aviation icing threat as well throughout the entire TAF period. Will update all forecasts to reflect the threat of thunder as well as freezing rain. Temperatures across southern Texas Panhandle will likely remain at or below freezing until just after noon. Latest radar trends indicate increasing coverage of rain or freezing rain, which is expected to impact the terminals around 14/14Z. LIFR conditions will occur as freezing rain or rain (dependent on temperature) moves over the terminals AFT 14/14Z.
421 PM EST Sat Jan 14 2017 System will exit the area this evening and high pressure will briefly build into the region.
1210 PM EST Sat Jan 14 2017 High pressure over the central Great Lakes will move east today and allow a weak trough of low pressure to move through the lower Ohio valley.
The persistent Upper Mississippi Valley high pressure is rebuilding across Iowa this afternoon and will expand over the forecast area late tonight. Broad lift will be on the increase across the middle of the country Sunday in response to upper diffluence and increased flow ahead of a closed upper low in the far southwest states. Have forecast highs a couple degrees warmer than today.
High pressure over the region overnight will keep the weather dry and mild.
High pressure will build over the area again through Sunday night.
Looking at the latest surface observations, where warm advection is the strongest, temperatures have warmed to above freezing with dewpoints nearly saturated. This encompasses the counties south of PA including the ridges, with the exception being Garrett county. Thus, have opted to cancel the freezing rain advisory for these counties. Further north, dry air remains, with a period of wetbulbing likely to bring above freezing temperatures down a degree or two. Thus, the freezing rain and wintry mix threat remains. Some icing may still be possible in a few spots where temperatures hove near freezing, but overall concerns for further impact is low. A deeper trough is progged to develop over the plains for the start of the new week.
459 PM EST Sat Jan 14 2017 A backdoor cold front will move just south of the area and become diffuse. The front will then move back north on Sunday, bringing a return to some warmer temperatures. An upper ridge over the southeastern part of the country will favor above normal temperatures through mid week.
1226 PM EST Sat Jan 14 2017 Relatively cooler high pressure will extend into the Carolinas through the weekend.
Upper ridging in a dry northwest flow aloft is currently making for quiet weather across northeast Montana. A lee side trough setting up along the front range is helping scour out some of the lingering arctic airmass over central and eastern Montana.
1235 PM EST Sat Jan 14 2017 Cool high pressure will briefly build in from the northeast today, followed by a secondary cold front on Sunday, and then another reinforcing high pressure Sunday night. This colder air mass coupled with extensive cloudiness will yield afternoon temperatures in the mid-upper 40s north to the lower 50s south. Some thinning of the low clouds may occur this evening as the flow just above the surface becomes westerly in the wake of the exiting perturbation.
Upper ridge will remain in place over the southeastern states today with a continuation of the recent warm and dry weather. Low levels of the 12Z sounding are a bit cooler than 24 hours ago, so expect high temperatures to be one or two degrees cooler as well.
343 PM CST Sat Jan 14 2017 The surface freezing line has made little progress to the north today, and with additional precipitation expected now thru overnight, the freezing rain advisory has been extended through 6 AM tomorrow along the I40 corridor. Additional accumulation is expected later tonight across this region, and temperatures now appear they will remain at or below freezing for most locations in the ice storm warning through late tomorrow morning. Far northwestern OK could remain below freezing through Sunday night so another extension for Harper and Ellis Counties may be needed.
This could be a hint of what's to come regarding warmer temperatures in the next few days. Warmer conditions will be the main forecast highlight in the short term period. an upper level cutoff low was off the coast of Baja California, with a ridge over the Canadian Rockies.
300 PM EST Sat Jan 14 2017 Cool high pressure at the surface will drift offshore tonight.
High pressure drifts across the region today, providing very light winds. High pressure moves eastward and moisture return begins as winds turn to the south. Overnight lows with the increase in southerly flow after midnight and cloud cover may warmer. It will be warmer in an increasing southerly low level flow as surface ridging moves eastward. Still seeing model differences with regard to thermal profiles aloft, with the ECMWF still trending warmer than other models. The GFS continues to be much cooler with a stronger influence from Northern Stream energy diving into the Northern Plains. Discounting the cooler GFS, at this point it appears that most precipitation on Sunday night would be in the form of freezing rain with a possible brief period of sleet.
This low will develop northeast into northwest MO by 00z/Tue, in tandem with the parent upper-air system. Strengthening southerly low-level winds ahead of the migratory cyclone will advect a seasonably moist air mass present over the southern Plains this morning north into the region, atop a shallow, sub-freeing air mass. Forecast soundings indicate that the predominant precipitation type will be freezing rain, possibly mixed initially with some sleet. The precipitation shield will subsequently spread north across the remainder of eastern NE and southwest IA Sunday into Sunday night ahead of the approaching deep-layer cyclone.
freezing precip will then prevail at KBVO thru early Sunday. Freezing line continues to slowly migrate back to the northwest. so the latest additions to the warnings and advisories will continue through 2 pm with the thinking that those locations will warm above freezing. Rest of the weekend essentially unchanged as warmer air overtakes the entire cwa Sunday.
An upper level low pressure system crossing northern Mexico this weekend will continue to spread moisture northward into southern Utah. High pressure aloft will settle over the Great Basin for the first half of the week, followed by a return to an active weather pattern late in the week. An upper low spinning along the Baja coast will pivot and slowly translate eastward across northwest Mexico through tonight. Moisture associated with this low continues to spread northward across the Desert Southwest, and into portions of southern Utah this morning, and this will remain the case through the duration of the weekend. Will monitor trends through the day, but may need to increase valley cloud cover over the next 2 days, while the higher elevations remain sunny/clear.
Currently, west-northwesterly flow aloft with a subtle mid level trough over the region. Mid-level WAA with 850mb temps near to above 0C but doubtful any of this warmer air will reach the surface. For the overnight low tonight I basically copied the low from this morning and weighted it with a blend of the CONSRAW/Superblend (2 of the models verifying well on average for MinT the past month). Upper level low ejecting through the Central Plains merges with a northern stream S/WV trough moving southeast out of Canada.
319 PM CST Sat Jan 14 2017 Rather distinct warm frontal boundary draped near the LA/AR state line.
We therefore cancelled the dense fog advisory for the Upper Treasure Valley but will let it continue in the Lower Treasure Valley. The shallowing should continue into Sunday at which time the fog should be mainly in the Lower Treasure Valley. A weak embedded trough in the northwest flow aloft will spread clouds over our CWA today, clearing tonight.
Upper level trough over Ontario will move east today and keep the area in northwest flow aloft through Sun morning. Flat upper level ridge will move over the area Sun. Water vapor indicated an upper trough off the west coast of BC will move in from the west Mon afternoon on the northern stream. The trough will interact with a trough moving northeast out of the desert southwest. Upper level trough off the Baja coast will move into southern WI by 12Z Tue.
417 PM EST Sat Jan 14 2017 High pressure will build over the area again through Sunday night.
With dry air holding firm between an area of low pressure to the north and developing low pressure well to the south, we should see clear skies tonight and sunny skies on Sunday. The main concern in the extended is an area of low pressure moving into the Upper Midwest from the Central Plains, which will bring a wintry mix of precipitation early this week.
A wave of freezing rain was moving across the area early this morning. The surface temperatures over parts of southeast MO and southwest IL may have risen above freezing by the time the overnight rain arrives, and for those locations the freezing rain threat will have ended. Depending on the location of the surface freezing line, future shifts may be able to end the Ice Storm Warning early for some areas. Temperatures are expected to rise above freezing across the southern half of the CWA on Sunday. The combination of rising temperatures and a northward shift of the precipitation axis will end the threat of widespread freezing rain from south to north on Sunday/Sunday night.
Dry air and high pressure over southern Wisconsin will lead to another cold night with clear skies and light winds. Low temperatures are tricky tonight because models seem to be reacting to the weak 925mb warm air advection on the west side of the ridge. Temps Thu are expected in the mid to upper 30s with return southerly flow around the high.
301 PM CDT Wed Mar 15 2017 Conditions expected to remain dry overnight as we stay under a slow- moving high pressure ridge, associated with very strong 1033 mb high pressure system progged to be situated over the lower Mississippi River Valley by 00z tonight.
406 PM EDT Wed Mar 15 2017 An area of high pressure will continue to dominate the weather across the region through the end of the work week.
High pressure then builds in tonight into Thursday with dry conditions. Lows tonight will drop into the teens, with highs on Thursday warmer into the mid to upper 30s.
226 PM PDT Wed Mar 15 2017 Rain showers continue into the afternoon and evening across the region as warm moist air surges up ahead of a cold front. The cold front should be fully through the region by 4am Thursday morning as cold air pushes in behind of the front briefly.
240 PM CDT Wed Mar 15 2017 High Impact Weather Potential: A risk for nuisance wintry precipitation remains on Thursday night, especially near and north of I-94 where a messy mix of snow, sleet, and freezing rain may be possible for a time. Quiet and bright/sunny afternoon across the area, and that leads us into a quiet night as high pressure slides just east of the area while some thicker cirrus invades from the west.
253 PM MDT Wed Mar 15 2017 High pressure aloft will continue to bring us afternoon temperatures running some 15 to 20 degrees above normal for most of this week. Upper level high pressure is controlling our Borderland weather most of this week. An upper level short wave trough over Baja California is being ingested into the ridge making it fairly dirty resulting in variable high cloudiness for our area.
It will warmer across the area tomorrow, especially in the west as lingering clouds will provide a limit to the warming available in the east.
318 PM EDT Wed Mar 15 2017 Low pressure will slowly lift northeast out of the region through Thursday.
1127 AM MDT Wed Mar 15 2017 Early morning WV imagery and RAP upper level analysis show steep NW flow over our CWA between building ridge in the western US and large scale trough across the eastern US.
236 PM CDT Wed Mar 15 2017 Quiet weather expected overnight, as a ridge of high pressure drifts eastward across the state. However, as the ridge axis shifts east, some mid and high clouds associated with the warm air advection will move eastward toward the region. Moisture channel satellite imagery depicts a deep trof over the eastern US with north to northwest upper flow over IL. High pressure at surface to gradually track over state through Thursday.
306 PM CDT Wed Mar 15 2017 Cloud cover around Galveston Bay has been persistent and has kept temps a bit cooler than fcst today.
312 PM CDT Wed Mar 15 2017 Early afternoon visible satellite imagery together with RAP13 surface analysis showed high pressure and clear skies across most of Minnesota and Wisconsin. Despite the light winds, temperatures warmed above freezing at most locations along and north of I-94, with cooler temperatures near I-90 where there was more snow cover. Over the next 24 hours the ridge of high pressure will shift eastward and warm air advection will move from the Dakotas into western MN and lead to isentropic ascent, mid level clouds, and some light precipitation on Thursday.
1231 PM CDT Wed Mar 15 2017 Northwest flow aloft initially with upper ridge axis just to the west; ridge axis will shift east and flatten with modest westerly flow aloft on Thursday. /issued 349 AM CDT Wed Mar 15 2017/ Northwest flow aloft is expected to persist today and tonight as a flattening ridge edges closer to the CWFA. Thanks to the cold front, forecast highs should hang around the 60s with cooler temps off to the east where the cooler air is more pronounced. Mean ridging pattern gradually amplifies and shifts east for the end of this week and through the weekend.
230 PM CDT Wed Mar 15 2017 The Ozarks Region was within the inflection of a departing trough and an approaching ridge to the west.
227 PM MDT Wed Mar 15 2017 A ridge of high pressure will remain over the region through Thursday. A cold front associated with an upper level trough moving across the northern part of the country will drop south across eastern Colorado Thursday night.
306 PM CDT Wed Mar 15 2017 H5 analysis from earlier this morning has a longwave trough of low pressure over the eastern half of the CONUS with a ridge of high pressure located from the four corners, north into southern portions of Alberta and southern Saskatchewan. Closed low pressure was located over northern New York state with high pressure located over northern Mexico. At the surface, high pressure was anchored across the Ozarks and mid Mississippi valley. Elsewhere, temperatures were in the 40s with 50s along the highway 83 corridor.
314 PM MDT Wed Mar 15 2017 High clouds continuing to stream across much of the CWA but clearing from the west with the upper ridge moving slowly east into the Rocky mtn area.
Some lee troughing is contributing to windy conditions in the Livingston area with gusts to around 35 mph. Cooling aloft should help to steepen lapse rates and produce mixing of the lower levels. High temperatures on Thursday should range from the low 50s near Harlowton to the mid 60s near Broadus and Sheridan, WY.
, it is looking like a large portion of Jackson County and possibly portions of other south MS counties will see lows tonight near or just below freezing. /issued 358 AM CDT Wed Mar 15 2017/ Expect a nice day for the forecast area as high pressure moves overhead.
and a lee side trough develops, expect low level warm advection to increase with mostly easterly surface winds becoming southeasterly and then southerly. Return flow will begin in earnest on Thursday with a developing lee trough across the Central High Plains. Low clouds and patchy drizzle will overspread the area Thursday as the low levels moisten up.
1217 PM MDT Wed Mar 15 2017 Dry and benign weather is expected for the mid to late portion of the week as a low amplitude ridge axis moves eastward into the northern and central Rockies. Thursday will be even warmer across western Nebraska and the I80 corridor with highs near 80 around Scottsbluff and Sidney. Models show a weak cold front moving into Wyoming on Thursday. It will be noticeable more windy on Thursday ahead of the cold front.
211 PM MDT Wed Mar 15 2017 The axis of high pressure over the Rockies today will flatten on Thursday as a trough begins to move onshore tonight over the Pacific Northwest with an embedded disturbance to our north.
Thus, the high temperature forecast for today was lowered by a couple of degrees for many locations.
315 PM CDT Wed Mar 15 2017 (Tonight) Main focus for tonight will continue to be on the colder than normal temperatures as surface anticyclone slowly slides south and eastward into the lower Ohio Valley overnight tonight. Should be at least a few degrees warmer however in most locations as mid/high level cloudiness increases from west to east overnight tonight, with steady or even slowly rising temperatures after midnight tonight for western sections of the forecast area. Most areas will drop down into the low to mid 20s with the exception being portions of central Missouri due to the earlier onset of broken-overcast coverage of clouds. do expect a mostly cloudy to overcast day with temperatures quite a bit warmer than that of today.
1118 AM MDT Wed Mar 15 2017 Upper ridge building over the region will lead to dry weather with much warmer temperatures today and on Thursday. The upper ridge will shift off to the east late Thursday with an upper trough and surface cool front creating a chance of rain on Thursday night.
207 PM MDT Wed Mar 15 2017 Early morning WV imagery and RAP upper level analysis show steep NW flow over our CWA between building ridge in the western US and large scale trough across the eastern US.
327 PM CDT Wed Mar 15 2017 Main focus is the weak trough passing through the area this evening/overnight. With surface and ground temperatures below freezing, any moisture that reaches the surface will re-freeze. Given the high uncertainty over how much QPF and the coverage, will forgo any headlines at this time. More favorable mixing is expected Thursday evening with the passage of a trough.
527 PM EDT Wed Mar 15 2017 Weakening low pressure tracks slowly towards the Canadian Maritime Providences through Thursday.
WV imagery this morning showing upstream ridge situated over the wrn CONUS with hefty Pacific moisture riding up and over into the cntrl Plains.
Arctic high pressure building into the se U. will bring sub-freezing temperatures tonight. Winds will remain in the 5-8 mph range at the coast keeping the ne Fl beaches just above freezing but winds will make it feel sub- freezing. The high pressure center will settle over s Ga/n Fl on Thursday with slowly moderating temperatures and lighter winds.
221 PM PDT Wed Mar 15 2017 High pressure continues to hold steady across the state and will continue to do so through the forecast period.
Surface wise, a massive, north-south oriented region of high pressure covers the eastern United States, the eastern Gulf of Mexico and the Florida peninsula. Along the Florida Keys, the coolest weather since late January, will be felt Thursday morning with low temperatures expected to fall into the lower to mid 50s in the Upper Keys to near 60 degrees in Key West.