Aikyam-Lab/Synoptic-Bench huggingface dataset:
A broad area of high pressure extended from Oklahoma, through the Missouri Ozarks and into the Ohio Valley. This high will continue to slide east tonight, with southerly low level flow becoming more pronounced across the local area and will continue into Tuesday. With the southerly winds, temperatures will be on the upswing as lows tonight will only drop into the teens, while highs Tuesday top off in the lower to middle 40s.
A frontal boundary across the northern Gulf waters and north FL drifts down to the Nature Coast during the day as Atlantic high pressure ridging into central FL shifts south and east. There will be enough moisture along with energy from the approaching front for afternoon showers with the higher odds in the north closer to the front. East and southwest winds turn to the northwest or north later today as the front moves in and high pressure shifts to the south and east.
211 PM EST Mon Dec 19 2016 High pressure will crest over the area early this evening.
Low level northeasterly flow continues to filter that cooler air into Central Alabama. So, if you went outside, you'd actually see clouds moving in two opposite directions if you had enough breaks in the lower stratus like we do along the I-65 corridor. So what does this mean for the weather today? With the huge inversion in place, the low stratus isn't expected to mix much across eastern Alabama. Believe there will be enough dry air eventually working into the west that TCL/BHM/EET lose the lower ceilings around 00z.
1133 AM CST Mon Dec 19 2016 The mean, longwave upper trough across the central/southwest CONUS is in the process of breaking down, with a northern branch of upper level westerlies off of the Pacific taking over from tonight through midweek.
Southwest low level winds will continue to bring warmer air into the area this afternoon. Subjective 00Z upper-air analysis indicates deep upper-level trough over the eastern half of the CONUS, with a southwestern US trough also in place. Coldest air at 850mb was centered over ONT, with the central Plains on the western edge of the thermal trough.
333 PM CST Mon Dec 19 2016 After just about 42 hours below freezing in the Metroplex, we've "warmed" nicely into the upper 30s and lower 40s this afternoon across the region. Surface analysis reveals our sprawling arctic high pressure system has become elongated, and stretches from Texas, to the Ohio River Valley, and into New England. The ridge axis is almost directly overhead, nicely demarcated by northerly winds from Waco south, and veering southerly winds just north of the Red River. Southerly winds will return to the region on Tuesday, and will help usher in warmer air.
As the center of the Arctic surface pressure ridge settles along and north of the I-40 corridor, nearly ideal radiational cooling conditions will develop tonight. /issued 309 AM CST Mon Dec 19 2016/ Arctic high pressure continues to build into the Mid-South this morning. Current temperatures range from the lower teens to the lower 20s. The high will settle over the area tonight. A gradual warming trend will begin on Tuesday as the high shifts east.
Forecast focus on warmer temperatures this week followed by the potential for another significant storm system arriving just in time for Christmas weekend. Tuesday and Tuesday night: Zonal flow aloft so warmer temperatures. However, readings will still remain below freezing where several inches of snow depth should exist. Highs will range from the upper 20s north to the lower to mid 30s south.
1031 AM MST Mon Dec 19 2016 Northwest flow aloft continues this morning ahead of a weak ridging across the Pac NW. A strong 1045mb high pressure sits across the central plains into the Midwest. A weak but fast moving cold front will cross the region Tue night associated with a strong wave near the ND/Canadian border.
Have already extended the high wind warning to include Wheatland County thru this evening, and will make no changes to Livingston, Nye, Big Timber. It should become fairly windy across the lower elevations late this afternoon and evening despite the stabilizing influence of snow cover, have adjusted winds up accordingly, and have already extended the winter wx advisory for blowing snow thru midnight for the west half of our cwa. Temperature at Big Timber has risen to the lower 30s, and sure enough we are not seeing a visibility reduction at 6S0 despite a recent gust in excess of 70 mph. These issues should continue to improve as temps rise further above freezing, especially by tomorrow.
Tuesday night a mid level trough dips into the Texas panhandle region with a weak surface feature developing over LA.
The 20z MSAS surface analysis indicated a large area of high pressure that extended from TX northeast through the Ohio Valley into the northeast CONUS. A strong area of low pressure was situated over northern Alberta. This system, compromised of the aforementioned area of low pressure, a cold front and a mid-level trough, is forecast to brush northern sections of WI mainly during the late morning/early afternoon hours. Probably the worst thing will be the gusty southwest winds that will veer west behind the cold front.
352 PM CST Mon Dec 19 2016 Cold front that came through the area continues to push further south across the Gulf of Mexico. Cold air advection will continue tonight which will bring sub freezing temperatures to the northern half of the CWA. A reinforcing upper level trough will rotate across the Great Lakes Tuesday. Moving into the middle of this week, flow across the area will become zonal as an upper ridge builds across the Bay of Campeche and weaker trough tracks across the upper Mississippi River Valley.
Arctic high pressure is currently centered over Illinois. Otw, high pressure will be slowly building our way from the northwest through the taf period.
Highs for Tuesday look to be similar to Monday (approaching 30) with more sun counteracting the breezy and cooler northwest flow.
/issued 1127 AM CST Mon Dec 19 2016/ Bitter cold morning with temperatures just now climbing above the freezing mark along and south of I-20 and areas farther north soon to follow. Did make a few adjustments to max temperatures for this afternoon, mainly to lower highs over our northern sections which should remain in the upper 30s to right at 40 degrees while points farther south will reach the lower to mid 40s with a few exceptions.
Upper ridge axis will move overhead tonight/Saturday with 700 mb temps rising to 6-8C by Saturday aftn.
Latest 12z model runs show an upper ridge building across the western U. The ridge axis will push across the CWA on Saturday with warm and dry weather conditions.
Main cold front is still off to our west and is moving through eastern Iowa and northwest Missouri late this morning. 08z/3am surface analysis shows 1009mb low over western Iowa with warm front extending southeastward into central Illinois. Have therefore carried likely PoPs during the morning hours, with the higher PoPs quickly shifting into the far east and southeast by early afternoon as a cold front pushes into the area. Once the front passes, a cooler/drier airmass will arrive tonight with lows dropping into the lower to middle 30s. High pressure will provide quiet weather across central Illinois this weekend.
MVFR conditions will continue through much of the period as a cold front moves through the state overnight. For much of the state, after the cold front moves across the terminals, ceilings will lift before completely clearing out soon-after. Meanwhile, a cold front is still fcst to sloly apch NRN AR late today. Will cont to mention small rain chcs today, with the highest POPS noted ovr the NRN counties.
1116 AM MDT Fri Mar 17 2017 Current observations across Wyoming and western Nebraska show a weak cold front located near Riverton in central Wyoming, stretching southeast past Laramie and along the Colorado/Wyoming/Nebraska border early this morning. Today will be slightly cooler into the afternoon, but temperatures will still be pleasant with relatively light winds. Pleasant warm weather is expected this weekend as temperatures rebound on Saturday as another ridge axis quickly moves eastward and amplifies across the central Rockies. Afternoon temperatures in the 70's to low 80's are expected across the high plains with slightly lower readings in the upper 60's west of I-25 including Rawlins and Laramie.
Stacked but progressive low pressure is working its way from northern Minnesota into the Great Lakes, currently trailing a cold front through the mid-Mississippi Valley. Showers and a few thunderstorms associated with a pre-frontal trof have been moving through the Ohio Valley, and are now laying out east to west across south-central Kentucky.
123 PM EDT Fri Mar 17 2017 High pressure will prevail across the area through tonight.
630 PM EDT Fri Mar 17 2017 A ridge of high pressure will build into the region with clearing skies and cool temperatures expected today and tonight.
Upper level ridge axis has shifted east into the Great Basin as an atmospheric river approaches the West Coast. These high temperatures are around 10 degrees warmer than normal for this time of year.
102 PM CDT Fri Mar 17 2017 /18Z TAFS/ Similar to yesterday at this time, the low cloud field has eroded across all except some of our southern and eastern counties. Numerical guidance during the past couple of days has been too low with some of the low cloud ceilings, but considerable moistening of the boundary layer is indicated late tonight. Similar to the past couple of overnight low cloud intrusions, KABI will be near the northern edge of the low cloud field. Also, a trough of low pressure, to the west, will produce gusty winds from the south and southwest today. /issued 353 AM CDT Fri Mar 17 2017/ (Today and Tonight) Look for dry conditions and warmer than normal temperatures for the next 24 hours.
and Saturday A band of snow and freezing rain continues to slowly track east through the cwa early this morning.
This will push a cold front through our region mainly this evening.
While the stratus is no more than 1000 feet thick, will keep low slightly warmer in the east. Saturday night, low pressure will nudge into the western plains with high pressure situated over the MS Valley. In effect, this will create a warm front which will move eastward across the forecast area. With the increasing southerly winds, blended in some warmer bias corrected ECMWF and GEM Global lows for Saturday night in with the super blend readings.
649 PM EDT Fri Mar 17 2017 High pressure will prevail through tonight.
325 PM CDT Fri Mar 17 2017 Surface observations at 2 PM placed a weak cold front from near Seminole northeast to Guthrie. As surface ridging nudges south from the Panhandles on Saturday, cool and moist upslope winds will persist for much of the day and delay the erosion of stratus.
Slight northwest H5 flow is ongoing over the region per latest RAP and water vapor analysis as a weak mid-level ridge develops over northwest Mexico. Despite the moisture, weak to moderate convective inhibition and H5 ridge suppression will keep showers at bay. There will be a few showers and thunderstorms over the higher terrain of Mexico off the Serrnias del Burros mountains. This activity is not expected to make it into the lower terrain of the Rio Grande Plains today nor tomorrow.
352 PM EDT Fri Mar 17 2017 Showers will continue to affect much of the area through the remainder of the afternoon and into the evening hours as a cold front bears down on the region. Even then, the cold air advection is not that strong behind the front and temperatures by dawn on Saturday should only fall off into the low to mid 40s for most locations. The 850 mb trough axis passes by midday and our flow veers more northwesterly with time. Temps should stay at or slightly above freezing Saturday night with the increased cloud cover and decent mixing ongoing through the night.
301 PM CDT Fri Mar 17 2017 18Z surface data has a cold front running from central Wisconsin into southwest Missouri. Dew points were in the 40s and 50s ahead of the cold front with 30s behind the front across the Plains. Some of the extratropical cyclones that develop across the CONUS will have the potential to be strong.
Ongoing MVFR to low VFR ceilings will persist ahead of a slow moving cold front.
Breezy northwest winds behind a cool front today, with slightly cooler temps than yesterday, but still very mild with highs in the 60s. Winds diminish tonight with high pressure overhead. High pressure gradually shifts eastward on Saturday with southerly winds returning. With somewhat poor mixing expected, highs will be cooler with readings in the upper 50s to lower 60s.
Despite the cloud cover, southerly winds have pushed temperatures into the lower and middle 60s across the southwestern two-thirds of our area, with middle 50s to lower 60s elsewhere. Quoting their Day 1 Discussion, issued at 1933z: "Recent upstream observations and high-res guidance still indicate the potential for isolated instances of marginally severe hail late this evening into the overnight, as updrafts, aided by 30-40 kts of effective shear, organize near the low level front.
129 PM MDT Fri Mar 17 2017 Latest upper air analysis continues to show the ridge over the Great Basin. A short wave trough was dropping south over the Great Lakes, serving to turn the flow more to the northwest. Water vapor showed very little moisture under the ridge. Most of the moisture was rounding the ridge over the Pacific Northwest and Northern Plains where the sky cover is located. However East Central CO will be west of the higher dew points and in the warmer air.
Cold front expected to push through the area overnight with primary impacts a wind shift and increased clouds. Looks like a brief opportunity too for some low stratus and some fog to sneak in over the srn zones due to low level flow coming off the warmer/more moist Gulf of Mexico.
High pressure will slide to the east, allowing for broad southwesterly flow aloft to return.
A vigorous upper level low is exiting Nova Scotia north into Newfoundland and dragging a strong mid-March cold front behind it across the Northeast. In between, we find West Texas with a building ridge. In fact, depending on your location, highs today will actually turn out to be warmer than yesterday.
141 PM EDT Fri Mar 17 2017 A ridge of high pressure will build into the region with clearing skies and cool temperatures expected today and tonight.
Cold front well into eastern Iowa with not much in the way of warming behind it. The latest sfc analysis was indicating a wave acrs southwestern IA, with associated warm front extending southeastward along and just south of the DVN CWA into southern IL. Passing sfc trof and wave will veer the llvl winds to the west and increase them to 10-20+ MPH with higher gusts during the same time frame, but some lag in cool advection by this flow until late in the day.
332 PM EDT Fri Mar 17 2017 Warm front this evening. Cold front late tonight into Saturday.
As the low-level jet increases later tonight, this may provide enough localized lift for a few areas of light rain to develop north of a Bowie to McKinney to Emory line. Upper level ridging will dominate the area for the next several days resulting in above normal temperatures.
This will push the cold front southward into Oklahoma/north Texas where it will stall out during the day on Saturday.
255 PM EDT Fri Mar 17 2017 Tonight will be a much warmer night than has been experienced in quite a few days as southerly flow has returned to the area ahead of an approaching cold front. Low temperatures Saturday morning will generally range from the upper 40s to the low 50s. Rainfall totals with this event will be highest across north Georgia, though even the highest totals are expected to remain around a half inch.
A cold front currently stretches from northern Illinois through southwest Missouri and into northwest Texas. The cold front will move out of north Mississippi Saturday morning with a few showers possible along and just behind the front. High pressure will start to build into the region by the afternoon hours. The air behind this cold front is not much cooler than ahead of it so temperatures will remain on the warm side with highs in the mid 60s to lower 70s. High pressure will remain in control of the weather for the remainder of the weekend.
/Issued 522 AM CDT Fri Mar 17 2017/ A cold front will move through the Panhandles this morning with winds shifting to the north and northeast 15 to 20 mph or 15 to 25 mph with higher gusts by late this morning.
WAA per downslope Rockies flow will support much warmer conds most places. Lee side trough will shift east overnight Sat, supporting very mild temps, esp in the lee of the Black Hills where downward flow transport will continue to mix down warm air aloft.
335 PM CDT Fri Mar 17 2017 Current WV imagery and H5 heights show moderate ridge over the western US with trough digging into the upper midwest. At the surface, a weak cold front is working its way into northern OK and NW AR. A few rain showers and perhaps an isolated thunderstorm or two will be possible this evening, primarily across the higher terrain of NW Arkansas, as the front moves through. Warm air advection ahead of the cold front has allowed temperatures to climb into the mid and upper 70s for much of OK and mid to upper 60s across western AR, despite a decent cloud deck all day.
High pressure over the greater region will eventually shift off to the east through the overnight.
317 PM EDT Fri Mar 17 2017 High pressure with a dry but cold air mass will become centered over northern New England tonight and Saturday and then drift to the northeast Saturday night as low pressure develops south of New England.
341 PM EDT Fri Mar 17 2017 A warm front will move north of the forecast area this evening. A low pressure system will push a cold front through the region overnight.
/Issued 335 PM CDT Fri Mar 17 2017/ Current WV imagery and H5 heights show moderate ridge over the western US with trough digging into the upper midwest. At the surface, a weak cold front is working its way into northern OK and NW AR. A few rain showers and perhaps an isolated thunderstorm or two will be possible this evening, primarily across the higher terrain of NW Arkansas, as the front moves through. Warm air advection ahead of the cold front has allowed temperatures to climb into the mid and upper 70s for much of OK and mid to upper 60s across western AR, despite a decent cloud deck all day.
252 PM EDT Fri Mar 17 2017 A cold front will bring showers on Saturday in addition to below normal temperatures over the weekend.
Chattanooga Airport, TN 51 69 38 61 / 90 50 10 0 Knoxville McGhee Tyson Airport, TN 49 66 36 55 / 90 40 10 0 Oak Ridge, TN 49 68 37 57 / 90 30 10 0 Tri Cities Airport, TN 44 62 33 52 / 90 50 20 10.
334 PM CDT Fri Mar 17 2017 An area of low pressure with a center in northwest Ontario will continue to move through the Northland tonight along with a cold front. Surface temperatures as of 20Z ranged from around 30 at KCKC to the lower to middle thirties most other areas. Precipitation types will vary from light rain/drizzle, to snow, to a period of freezing drizzle. We expect the coverage of freezing drizzle to be limited and do not plan on any headlines. Highs Saturday will range from the lower to middle thirties along the International Border, to the upper thirties to around forty from the Brainerd Lakes area east to Pine City, Hayward, and Park Falls.
636 PM EDT Fri Mar 17 2017 A warm front will move north of the forecast area this evening. A low pressure system will push a cold front through the region overnight.
320 PM MDT Fri Mar 17 2017 Record warmth continues across Utah and Colorado as high amplitude ridging remains across the region.
142 PM EDT Fri Mar 17 2017 Temperatures will continue to slowly rise above freezing and into the middle and upper 30s this afternoon. A cold front will sweep across the area tonight bringing another chance for light snow showers into Saturday.
Push of cooler air is arriving in northern Iowa this afternoon with status from South Dakota and Minnesota.
A cold front will then sweeps south into the region between 00-03z, bringing a line of strong showersto the region. cooler. drier air with northwest flow aloft will filter in behind an exiting cold front. An upper low to our north will rotate in minimal low level moisture with the upslope flow.
High pressure today has proven brief and quite underwhelming as the next weather system quickly spreads thickening cloud cover across the northwestern United States. Late Saturday afternoon a cold front will pass through the Northern Rockies, producing both wind gusts to 40 mph and perhaps even a few rumbles of thunder.
148 PM EDT Fri Mar 17 2017 Precipitation is expected today and Saturday as low pressure approaches and crosses the region. The exception to this will likely remain in some areas near/north of I-80 as well as the ridges, where snow may hang on longer. Upper low is still expected to approach the area by Saturday morning. Will maintain small chances of freezing rain near DUJ and along the ridges for now. The low is progged to drift E across the region Saturday. Snow is expected N of I 80 and in the ridges, though thicknesses/sounding profiles show boundary layer temps should warm enough S of I 80 for a changeover to mainly rain. Precip is expected to change back to snow Saturday night before tapering off as the low exits.
Chattanooga Airport, TN 51 70 39 62 / 90 50 10 0 Knoxville McGhee Tyson Airport, TN 48 65 34 56 / 90 40 10 0 Oak Ridge, TN 48 66 34 56 / 90 30 10 0 Tri Cities Airport, TN 44 61 32 50 / 90 50 10 10.
High pressure centered along the Mid Atlc cst will move over the wrn Atlc while elongating along 30N over the next 24H.
/issued 1001 AM EDT Fri Mar 17 2017/ High pressure will remain over the Southeastern United States this afternoon keeping the weather dry along with a northeast wind flow over South Florida.
A cold front will bring a chance of showers Saturday with warmer temperatures.
/issued 1012 AM CDT Fri Mar 17 2017/ High pres centered over GA is ridging west and southwest acrs the gulf coast. This is resulting in southerly winds acrs the area, bringing a warmer and more humid airmass to the region. Moisture will remain abundant in the lower levels but mid and upper levels extremely dry on a continued and dominant west to northwest flow. Minor exception will be a chance for just few showers Saturday mainly over the northern portion of the forecast area as a cold front slips into the area serving as a focus for afternoon convective development.
431 PM EDT Fri Mar 17 2017 Mixed precipitation is expected through Saturday as upper level low pressure crosses the region. Initially expect snow for the first couple hours this eve with a transition to rain, or a mix as warm advection modifies the temperature profile on the flank of digging Great Lakes low pressure. Also being monitored is the freezing rain potential, but this appears limited given the dynamic and moisture paucity as well as the warm advection magnitude. The upper low will drift across on Saturday, bringing colder 850 mb temperatures back to the region.
High pressure on the NC/SC line will ease toward the coast today with northeast winds becoming more easterly in the afternoon. High pressure north of the states eases eastward today with northeasterly winds that diminish some in the afternoon as the gradient relaxes.
313 PM EDT Fri Mar 17 2017 A ridge of high pressure will build into the region with clearing skies and cool temperatures expected today and tonight.
207 PM MDT Fri Mar 17 2017 A strong upper level ridge centered over the Great Basin will shift east over Colorado Saturday. It will be warmer under the ridge Saturday with highs climbing into the upper 70s and lower 80s.