Aikyam-Lab/Synoptic-Bench huggingface dataset:
Rain over the area will continue to dwindle and move eastward out of the area this evening as the parent low pressure system moves east across the Gulf states. Highs should top out in the lower 70s and lows Sat night should be in the lower 50s.
Very quiet weather expected in the short term, as an area of high pressure edges southeast into the mid-Mississippi Valley. Another cooler night on tap with lows a couple degrees either side of 50, coolest over eastern Illinois. As a ridge of high pressure aloft builds eastward, temperatures aloft will build into the upper teens Celsius at 850 mb, resulting in highs in the 80s beginning Sunday and continuing much of the week.
325 AM CDT Sat May 13 2017 West Texas and southeast New Mexico will be under upper ridging today between an upper trough over the Pacific Northwest and an upper trough over the east coast. There is a slight chance of thunderstorms across the higher terrain today with possible disturbances moving over the area under westerly flow aloft. There is a slight chance of thunderstorms across the CWA with the most likely area being the higher terrain.
1251 AM CDT Sat May 13 2017 Upper ridging will keep VFR levels intact with southerly winds generally under 15 knots. /issued 320 PM CDT Fri May 12 2017/ Tonight will be fairly quiet as upper ridging moves overhead. We will warm back into the 80s and 90s over the weekend as southerly winds at the surface return and a thickness ridge settles overhead by Sunday.
The main upper low is centered near Astoria, and another wave will rotate along the bottom of the trough and across eastern Oregon tonight and Saturday morning.
Upper level ridge over the central High Plains this morning will move into eastern Kansas and Missouri by later today with increasing southwesterly flow aloft developing over the region.
122 AM EDT Sat May 13 2017 A ridge of high pressure will slowly build into the Ohio Valley this weekend as it moves in from the Upper Midwest.
302 AM MDT Sat May 13 2017 Mid/upper-level ridge axis has shifted east into the plains with southwest flow ensuing in its wake. At the surface, 994mb low pressure area was centered just east of Billings at 07Z, with a well-defined cold front extending south/southwest thru western WY. As a result, expect the aforementioned cold front to make very little progress towards the CWFA during much of the day. The late arrival of the cold front will be problematic when it comes to convection, likely delaying any development until early/mid afternoon ovr the Laramie Range and late afternoon/evening ovr E-central WY and the N Nebraska Panhandle. Temperatures will be a few degrees cooler Sunday behind Saturday nights weak fropa.
331 AM CDT Sat May 13 2017 Nice weather expected today across central and southeast IL with a fair amount of sunshine and warmer highs in the upper 70s to around 80F and low humidities. Models have trended a few degrees warmer today from 76-81F with westerly winds 7-14 mph, ample sunshine and dry airmass.
Drier air aloft is expected to filter in behind the upper low and cause clouds to scatter out overnight. Tonight through Sunday Upper low was centered ovr SWRN AR this aftn. Temps wl begin to moderate by Sun as south winds return and high pressure aloft blds into the region.
/issued 230 PM CST Thu Jan 4 2018/ (Tonight and Friday) Mid and upper high cloudiness was spreading across West Central Texas this afternoon, as an upper level trough approached the region. It should be slightly warmer in the lower/mid 30s tonight with increased cloud cover and south winds less than 10 mph.
Wind chill warnings and advisories remain in effect through Friday as arctic advection continues into the base of the Ern CONUS trough. Mid level low pressure will drop swd across the Great Lakes region and reinforce the ERN CONUS trough, and resultant cold into the weekend. Considering both the temperature and the fact that even marginal wind will bring wind chill values below headline thresholds, have upgraded the Wind Chill Watch to a warning for the higher terrain, and issued a wind chill advisory for the rest of the area.
/issued 318 PM CST Thu Jan 4 2018/ After a brief break above freezing yesterday, temperatures today are struggling to get into the 30s across the Midsouth with Arctic high pressure building into the region.
As the upper level disturbance moves across the area for the evening and overnight period, light precipitation is expected to develop aloft, but it is so dry at the lower levels that any precipitation will evaporate before reaching the ground. As the lift associated with the trough moves through the area this evening and overnight, should see an increase in returns on radar.
Weak upslope flow may continue to generate a few flurries over favored areas of the higher elevations but terminals should remain dry and VFR through the next 24 hours.
Dry weather will prevail through Friday as a ridge of high pressure over northern Baja builds northward into central California.
Most sites had highs in the low to mid 50s, which is between 15 and 20 degrees below the 30-year average for early January. The pressure gradient is more relaxed tonight resulting in lighter winds but still enough of a breeze to see wind chill readings drop into the low to mid 20s. NNW flow at or below 15 knots veers more northerly during the day as high pressure shifts well north of the region.
Strong NNW gradient flow remains across southeast Michigan with an arctic high pressure drifting through south Ontario and a strong Nor'easter riding up the east coast. Weak cold air advection today through 12Z tomorrow morning can be characterized by 850 mb and 925 mb temperatures decreasing a few more degrees into the low to mid -20C range. Winds are expected to remain elevated between 5 to 15 mph with the highest winds residing in the Thumb and eastern edges of the CWA.
A ridge will persist across the region through tomorrow.
Lows tonight will remain below normal, but a few degrees warmer than minimum temperatures last night. Expect further saturation in the low levels to occur, with light snow reaching the surface by this evening.
312 PM MST Thu Jan 4 2018 An upper ridge over the Great Basin is helping to bring continued dry weather and mostly clear skies to the region. Highs on the plains will range from the lower 40s over the far NE plains to the mid to upper 50s along the base of the foothills. The upper level trough developing off the northern California and Oregon coasts is forecast to hold itself together and bring down heights over the western U.
The trough over the eastern US will begin to push eastward and an area of high pressure will move into the upper Mississippi River Valley during the day.
Otherwise, variable winds tonight become south to southeast midday Friday as surface ridging slides east with speeds at or below 7 knots through the TAF period.
345 PM MST Thu Jan 4 2018 Upper level ridging parked over the Great Basin will remain in place tonight with patchy high clouds drifting through the region. The ridge starts to flatten out a bit on Friday with a general increase in mid and high level moisture. Ridge continues to level out Friday night as Pacific energy rides into the Great Basin. Will also see winds shifting from the NW to W, especially over our higher ridges.
This leaves temperatures ranging from the mid to upper 30s this afternoon in central and north central Kansas, dropping to the lower 20s in very northeastern Kansas. With surface winds from the northeast, temperatures will reach into the low 30s and upper teens.
1040 PM EST Thu Jan 4 2018 Cold high pressure will dominate through the weekend.
As the nor'easter lifts up the Atlantic seaboard, high pressure will continue to build into the area with a dry reinforcing boundary moving through on Friday. Lows are expected to fall into the lower 20s across northern Levy county, and in the mid to upper 20s across the rest of the warning area. Coastal portions of the rest of the counties should remain above freezing, with isolated normally colder locations possibly seeing an hour or two of freezing conditions.
704 PM CST Thu Jan 4 2018 High pressure in eastern Manitoba pushing dry and cold air southward into NW MN. The initial question is how cold will it get Fri night and early Sat morning ? 20 below or more is certainly possible from Baudette down to Park Rapids with considerably warmer readings to the west under the influence of the warm air advection. The next few days should be quiet and mild with an approaching cold front providing an increased risk for snow mid week along with colder temps.
537 PM CST Thu Jan 4 2018 Surface analysis this afternoon shows a large area of arctic high pressure extending south into the mid-Mississippi Valley on the backside of a powerful nor'easter storm bringing significant snow and strong winds to the East Coast. Aloft, a highly amplified pattern resides over North America with a deep trough east and a strong ridge west, keeping the path open for cold air to reside over the north-central region with northwest flow.
951 PM CST Thu Jan 4 2018 Webcam and GOES-East observed trends trough 0347 UTC depict fog developing across Bowman county, and perhaps to a lesser extent across portions of Slope and Golden Valley counties. Expect a band of very light snow to continue through the night central and far northwest in association with the low level baroclinic zone. To the west towards the warmer side of the thermal gradient an opportunity for freezing drizzle exists tonight, mostly in a thin zone from Williams and McKenzie counties down southeast through Grant County. Further west and south, enhanced low level moisture and upper level ridging bring a possibility of fog and reduced visibilities.
The upper ridge will remain over Idaho through Friday. Moisture associated with an upper low near the Pacific Northwest coast will bring a chance of light precipitation to mainly northern portions of the forecast area (which includes far northern Harney County, Baker County, and the West Central Idaho Mountains) late tonight through Friday. There is also a slight chance of freezing rain in the valleys as the inversion will hold at least through Friday morning. Freezing rain is possible around KBNO and KBKE as well as KONO.
Expect a band of very light snow to continue through the night central and far northwest in association with the low level baroclinic zone. To the west towards the warmer side of the thermal gradient an opportunity for freezing drizzle exists tonight, mostly in a thin zone from Williams and McKenzie counties down southeast through Grant County. Further west and south, enhanced low level moisture and upper level ridging bring a possibility of fog and reduced visibilities.
While the low cloud deck across northern sections will gradually be decreasing, midlevel clouds associated with a jet streak will be building in later tonight from the northwest.
As the low moves toward the Pacific northwest it will push the front through the region tonight into Friday. Freezing levels are fairly high so snow will be confined to the higher elevations. For the mid and lower elevations the precipitation will likely be rain or freezing rain. As the airmass warms Friday many locations will change from freezing rain to rain.
02 UTC surface analysis shows an area of high pressure across the Mid South near Memphis, TN. With time tonight, the high pressure area to the NW will drift NE and settle over Central Alabama. At present, 02 UTC observations are running a little warmer than the current forecast.
As monster nor'easter moves further away and high pressure builds southward toward Gulf Coast region.
/issued 255 PM CST Thu Jan 4 2018/ Water vapor imagery shows a broad trough of low pressure over the eastern half of the United States this afternoon, with a weak disturbance moving through the northwest flow aloft just to our north. However, gone slightly warmer though than the previous forecast, as there is some thicker cirrus to our west that will likely move into the region later tonight and act as a bit of a blanket.
However, as the lower levels remain dry, not expecting much out of the rain as most should evaporate before reaching the ground, with a few sprinkles possible reaching the ground. But for Friday, with the center of the higher farther east, winds will be able to take on a more easterly shift. Temperatures for Friday are also expected to be warmer with temperatures rising into the lower 60s, possibly mid 60s across the southern Coastal Bend toward Kingsville.
647 PM EST Thu Jan 4 2018 Cold high pressure will dominate through the weekend.
With overnight lows dropping into the mid- teens, there is also the chance for some freezing fog. High pressure builds back into the region on Friday with quiet weather continuing for the rest of the day. As a result, high temperatures will be slightly cooler than Thursday. The large scale pattern is characterized by a mid-level ridge extending from Sonora through the Northern Rockies, northwest flow overhead, and an mid-level trough over the eastern CONUS.
835 PM CST Thu Jan 4 2018 Thin cirrus continues to overspread the region from the west late this evening in response to a weak upper level trough located across the Tx Hill Country into Northern Mexico. For our region, the high thin cloud cover will become more and more opaque, especially along and south of the I-20 Corridor as we move towards sunrise. With surface ridging across our region overnight, winds should remain light to near calm across all but our extreme western counties with our northern and northeastern most zones less under the influence of the increasing high clouds.
Low teens and single digits should settle in for everyone in the morning, with the lowest temperatures over the northern Cumberland Plateau. Needless to say, the cold air is also keeping the low levels dry, so look for VFR wx the next 24 hrs. As the ridge approaches the mid state, expect surface winds to diminish overnight, with lesser speeds tomorrow than today.
A weak cold front will then slide south through the area on Friday.
Freezing rain and some snow is expected in the Cascade passes through Friday. The trough will move east across the Cascades by early Friday evening with any mixed precipitation becoming rain in the passes.
Some freezing fog is possible along the boundary of that cloud deck and the clear skies to the west, but difficult to say how widespread this will be. This was from overrunning of a warmer and more humid airmass over a shallow colder thin layer of air over the valleys. An upper ridge over the northern Rockies this afternoon is the main culprit.
951 PM CST Thu Jan 4 2018 Surface analysis this afternoon shows a large area of arctic high pressure extending south into the mid-Mississippi Valley on the backside of a powerful nor'easter storm bringing significant snow and strong winds to the East Coast. Aloft, a highly amplified pattern resides over North America with a deep trough east and a strong ridge west, keeping the path open for cold air to reside over the north-central region with northwest flow.
356 PM MST Thu Jan 4 2018 Upper level ridging parked over the Great Basin will remain in place tonight with patchy high clouds drifting through the region. The ridge starts to flatten out a bit on Friday with a general increase in mid and high level moisture. Ridge continues to level out Friday night as Pacific energy rides into the Great Basin. Will also see winds shifting from the NW to W, especially over our higher ridges.
302 PM MST Thu Jan 4 2018 An upper level ridge will continue building into the area tonight with the ridge axis being over UT by Fri morning, where it will remain thru the day Fri. Will tend to stay on the cooler side of guidance given that high level clouds are expected and could limit the amount of warming. The upper-level ridge and dry northwest flow will remain over the southwest U.
Surface analysis showing cold front remaining north from near Chadron to Newcastle to Sheridan to south central Montana this afternoon. Attention turns to Thursday as another low pressure system tracks into the northern Rockies.
Thursday will be very quiet with weak upper ridging moving into the upper midwest.
Skies will remain clear and winds light as high pressure continues to influence the region. Prior discussion below: Strong high pressure ridging will continue to prevail over the region through the period. /15/ The period will start off with ridging across the Southeast CONUS with a respective ridge axis oriented through the Mississippi River Valley in response to a digging upstream trough over the Pacific Northwest.
648 PM CDT Wed Oct 18 2017 A cold front moved through the region today, which plummeted high temperatures back down to a mere 10 to 15 degrees above normal for this time of year. These winds will keep the airmass mixed and mild across much of sandhills, where some inversions may reform across parts of central and southern Nebraska with lows dropping into the 30's in some of the lower spots.
Expect lows ranging from the low to upper 50's, bringing temps within a few degrees of normal for most locations. The exception being the eastern coastal zones who will see temps hold in the lower 60's.
This afternoon a broad upper level trough was translating eastward across south central Canada and the northern plains. A more amplified upper level trough will begin to move onshore across the western US late Tonight as a broad downstream upper level ridge amplifies along the MS river valley. A weak southern stream upper level trough across southern CA and northwest Mexico will be kicked northeast into the four corners region.
Tonight and Thursday Dry conditions and warmer than normal temperatures will continue in the short term with low amplitude upper flow across the northern CONUS. A cold front moved into western Wisconsin during the day but there were only some middle and high clouds associated with it. Expect above normal lows tonight and plenty of sunshine on Thursday, so another much warmer than normal day is in store.
Otherwise moisture remains very limited in the low to mid levels and will be maintaining VFR at all terminals. /issued 350 PM CDT Wed Oct 18 2017/ Mid-afternoon sfc analysis shows high pressure continuing to ridge maintaining a light erly low-level flow. Sfc ridging is progged to slide ewd, allowing a light more serly low-level flow to develop.
1033 PM MDT Wed Oct 18 2017 Upper level analysis has fast moving upper trof across central Canada, with ridge rebuilding across the western CONUS. At the surface, high pressure has moved into the Northern Plains, with the weak cold front now well south and east of the area. Lee trof is quickly redeveloping across Wyoming and Montana. Upper ridge will rebuild for the latter half of the week, and strong southwesterly boundary layer flow will help temperatures climb into the 70s and 80s.
The second, and more notable, feature for our forecast is a trough seen swinging across the Gulf of Alaska into the Pacific Northwest this afternoon.
1031 PM EDT Wed Oct 18 2017 High pressure will remain in control through the end of the week before gradually shifting offshore through the weekend.
Today will be the hottest day of the week, with temperatures 10+ degrees above normal and reaching in the lower to mid-80s. A weak trough axis is currently located from Johnson City to Garden City to Hays, making winds in Southwest Kansas light today (under 10 mph), and in some areas, calm for a few hours this afternoon. Tonight, winds will remain light, with temperatures reaching the lower to mid-40s. Southwest Kansas will have a windy end to the week as the lee troughing continues to deepen in Colorado.
923 PM EDT Wed Oct 18 2017 High pressure will drift off to the southeast tonight and Thursday as a weak cold front approaches from the west.
611 PM CDT Wed Oct 18 2017 The cool high pressure that brought the marginally breezy conditions to the area will shift into northwest IA late tonight. This will help keep lows milder, in the lower to mid 40s, in south central SD with mid 30s possible in northwest IA.
With temperatures along the Canadian and North Dakota borders a little cooler than anticipated, blended the forecast with the high-res model that looked most favorable to current conditions, keeping in mind the uncertainty whether or not any cloud cover will serve to moderate the overnight lows. Some gusty winds are possible over the higher terrain of Phillips County, where gusts could be 20 to 30 mph. Flat zonal ridge will move across the area tonight and exit into the Dakotas Thursday morning. Thursday: Flow aloft will swing from a westerly direction into a more southerly direction as a high pressure ridge moves to the east and an upper trough moves inland from the Pacific NW. A thermal ridge is forecast to build back over Montana allowing for a rapid rebound in high temperatures mainly in the 70s.
Later this evening an approaching weak cold front will traverse the state from the northwest, but will also struggle to produce anything but scant high clouds. /Thursday night through Wednesday/ West to northwest flow pattern aloft to become more southwesterly into the end of the week as a large upper trough digs into the intermountain west.
1047 PM CDT Wed Oct 18 2017 The cool high pressure that brought the marginally breezy conditions to the area will shift into northwest IA late tonight. This will help keep lows milder, in the lower to mid 40s, in south central SD with mid 30s possible in northwest IA.
/issued 300 PM CDT Wed Oct 18 2017/ High pressure has moved well east of the area, yet cloud free skies still prevail for now. Temps back into mainly the lower 80s can be expected Thu and Fri with increased upper moisture and se winds picking up close to 10 mph durg the day. Deep upper trough approaching this wknd with first good chance of rain in a long time and this system shaping up to be more of a two round warm front followed by cold front scenario.
/28/ Strong high pressure ridging will continue to prevail over the region through the period. /15/ The period will start off with ridging across the Southeast CONUS with a respective ridge axis oriented through the Mississippi River Valley in response to a digging upstream trough over the Pacific Northwest.
842 PM CDT Wed Oct 18 2017 High pressure over the area will persist overnight with light south winds.
1147 PM CDT Wed Oct 18 2017 A cold front moved through the region today, which plummeted high temperatures back down to a mere 10 to 15 degrees above normal for this time of year. These winds will keep the airmass mixed and mild across much of sandhills, where some inversions may reform across parts of central and southern Nebraska with lows dropping into the 30's in some of the lower spots.
632 PM PDT Wed Oct 18 2017 Moderate precipitation will continue to fall tonight into Thursday as a low pressure system slowly sags through the region.
714 PM EDT Wed Oct 18 2017 Showers continue to spread across the area as a cold front boundary settles over South Florida.
Light southerly winds tonight should stay up enough to keep temperatures a bit warmer than what we saw in a few locations early this morning. Another great day shaping up for Thursday with sunshine and afternoon temps a few degrees warmer than today. The upper-level flow is forecast to amplify significantly over the lower 48 states from the nearly zonal flow that exists now.
Little change in the low-level pattern/sensible weather is expected through the short term period, with fairly wide diurnal temperature ranges. Skies are crystal clear this afternoon with temperatures in the low to mid 70s. Good radiational cooling conditions will be present again tonight, allowing lows to again fall back into the 40s, with temperatures near 40 in the typically cooler sheltered locations. Tomorrow, 500 mb heights will rise as a mid-level ridge axis moves into the Lower Mississippi Valley, but continued east-northeast winds will keep highs in check with only about a 3 degree increase expected.