Aikyam-Lab/Synoptic-Bench huggingface dataset:
1039 PM CST Fri Feb 7 2020 GOES water vapor/RAP 500mb analysis this afternoon showing a large long wave upper trough carved out across most of the CONUS. Meanwhile, a weak embedded short wave trough was progressing southeast across IA. Plan on lingering clouds/scattered flurries to continue tonight as the mid-level trough works through the area. High pressure builds in Saturday for increasingly sunny skies but highs will be a bit on the chilly side with readings only topping off in the teens and 20s.
/issued 212 PM CST Fri Feb 7 2020/ After today's weak cold front a few patches of fog will be possible Sat AM around sunrise.
1143 PM CST Fri Feb 7 2020 Water vapor imagery this afternoon shows a broad trough dominating the Nation, keeping a northwest flow in place locally across our section of the Lower Missouri River Basin.
1050 PM PST Fri Feb 7 2020 Slightly cooler temperatures this weekend.
258 AM CST Sat Feb 8 2020 Message of the Day: Sunny day today with slightly warmer temperatures than yesterday.
321 AM EST Sat Feb 8 2020 Weak low pressure will support light snow chances through tonight.
The lower troposphere is definitely dry, although the scattered to numerous sprinkles across the Straits reveal the effectiveness of this thin layer (860-780 mb) of warm air advection. A small region of 15 to 20 knot winds has developed across the Lower Keys, including Smith Shoal and Sand Key. From synopsis, a cold front has stalled to the south of the coastal waters of the Florida Keys, lending to gentle to moderate northerly breezes overnight.
This will bring breezy conditions, much cooler temperatures, and more rain/snow to the area tomorrow.
Another dusting (1/2 inch) of snow is still possible especially across the higher elevations. Still expect most of the accumulations to be on grassy and elevated surface but the higher terrain could experience some travel issues. SR Chattanooga Airport, TN 47 30 59 47 60 / 70 10 0 40 100 Knoxville McGhee Tyson Airport, TN 42 29 55 44 57 / 60 10 0 30 90 Oak Ridge, TN 45 28 56 44 57 / 60 10 0 40 90 Tri Cities Airport, TN 41 27 53 39 55 / 50 30 0 20 90 NC.
/Issued 635 PM EST Fri Feb 7 2020/ Mostly cloudy skies expected to break up this evening allowing temps to fall to the low- to mid-30s tonight and tomorrow morning. With temps just above the surface below freezing this means winter precip will be involved, and even though QPF is expected to be low, it will be enough with an approximate 7. Embedded in colder temps, areas of NW Georgia could see 1-2 inches, with higher elevations along the spine and mountaintops of the GA Blue Ridge mountains could see up to 4 inches in some isolated locations.
A weak cold front along the southern periphery of a Southern Plains high has worked its way into the northern third of the CWA. Isentropic flow of upper level warmer, more moist air overrunning lower layer cooler easterly air will provide enough gentle lift to produce thickening clouds.
Transition period today as the deep trough over the eastern parts of the country continues to move into the Atlantic meanwhile a ridge over the Rockies will turn the upper level flow more zonal throughout the day today. Tonight should remain mild ahead of a cold front which will pass through by sunrise.
950 PM CST Fri Feb 7 2020 Late evening sfc analysis shows an area of low pressure just nw of the forecast area at this time, with a cool front trailing swwd across sern/s-cntl TX. /issued 318 PM CST Fri Feb 7 2020/ Wx map shows weak high pressure over the NE Gulf of Mexico, with a weak cool front over NE TX and the ArkLaTex, moving southeast towards the region. Still a little cooler over Central and Southern Louisiana with temperatures in the lower to mid 60s where this area remains closer to the cooler air mass.
1048 PM CST Fri Feb 7 2020 As an upper level ridge builds across the Rockies tonight, temperatures aloft will rise across the area. This will also push a stationary front northeast as a warm front overnight. Highs from the lower 50s southwest, and upper 40s western Sandhills to near 40 northeast. Northern Nebraska will primarily be affected as a cold front sweeps southeast overnight.
A cold upper level trough will move southeast from the Pacific Northwest early Saturday, then settle into The Great Basin during the latter half of the weekend. The persistent, moist deep layer northwest flow aloft across northern Utah is beginning to dry as it backs around to the west ahead of the upper trough settling into the Pacific Northwest.
Transition period today as the deep trough over the eastern parts of the country continues to move into the Atlantic meanwhile a ridge over the Rockies will turn the upper level flow more zonal throughout the day today. Tonight should remain mild ahead of a cold front which will pass through by sunrise. The northern stream wave will force another cold front south through western Kansas late Saturday night.
Earlier, and northwest of our area in the higher terrain of the western Oklahoma panhandle into the front range, this narrow band produced noteworthy snow accumulation.
/issued 950 PM CST Fri Feb 7 2020/ Late evening sfc analysis shows an area of low pressure just nw of the forecast area at this time, with a cool front trailing swwd across sern/s-cntl TX. /issued 318 PM CST Fri Feb 7 2020/ Wx map shows weak high pressure over the NE Gulf of Mexico, with a weak cool front over NE TX and the ArkLaTex, moving southeast towards the region. Still a little cooler over Central and Southern Louisiana with temperatures in the lower to mid 60s where this area remains closer to the cooler air mass.
535 AM CST Sat Feb 8 2020 Low pressure will move across the southern part of the state later today bringing some banded snow with it. While the thinking is the precip will likely shut off at that point, there could be periods of freezing drizzle. North to northwest winds immediately behind the low will gust as high as 35 mph Sunday morning.
With that disturbance, a cold front will move through tonight. Ahead of the cold front, nearly zonal flow will help to deepen the lee trough causing southerly winds to increase throughout the day. The front will traverse the region tonight, bringing with it cooler air and breezy northerly winds. Temps for Sunday will struggle in the 30s across the area, but those temperatures will feel even cooler with northerly winds gusting to 30 to 40 mph during the day. Winds through the first part of the week look to be light and westerly to northwesterly, which will help temps be slightly warmer.
Water vapor loop also indicated another upper trough over the Pacific Northwest. Upper trough will move into southern CA by 00Z Mon. Upper level jet on the south and east side of upper trough will nose into SD later this morning and into NE Sat night. Another upper trough extended from northern BC to southern Northwest Territories. This trough will sweep across the forecast area for Sun. Little if any precipitation is expected with upper trough.
255 AM MST Sat Feb 8 2020 Broad upper trough continues to translate across the eastern US with brisk northwest flow over the northwestern US. Frontogenesis along the northern and northwestern periphery of the low will provide favorable lift for heavier bands of snow across portions of NE WY, NW SD, and the western SD plains. Winds will become breezy following the passage of a cold front overnight into Sunday, which could lead to patchy areas of blowing and drifting snow across portions of NE WY and northern SD.
Southerly winds will increase through the day in response to a deepening lee trough; wind gusts in north central KS could reach up to 20-25 mph. A cold front will push through the area, shifting winds to the northwest.
Upper ridge to the west slow to break down, providing a NW gradient aloft, keeping the moisture(clouds) moving thru the area. Lower levels towards the surface are seeing a shift to more WSW and this will only increase thru the day as a lee-side trough digs south along the Front Range. With this, and high pressure to the east, the CWA will lie between the two systems and will see a strong SSW gradient thru the afternoon, with gusts reaching the 30- 40 mph range. These above normal temps will be short lived as a cold front will begin to work SE thru the area overnight tonight, clearing the SE portion of the forecast area during the morning hrs Sunday.
A weak cold front will bring a slight chance of rain near I-95 this afternoon, with dry and seasonably cool weather for Sunday.
353 AM MST Sat Feb 8 2020 Broad upper trough continues to translate across the eastern US with brisk northwest flow over the northwestern US. Frontogenesis along the northern and northwestern periphery of the low will provide favorable lift for heavier bands of snow across portions of NE WY, NW SD, and the western SD plains. Winds will become breezy following the passage of a cold front overnight into Sunday, which could lead to patchy areas of blowing and drifting snow across portions of NE WY and northern SD.
/issued 212 PM CST Fri Feb 7 2020/ After today's weak cold front a few patches of fog will be possible Sat AM around sunrise. Sunday afternoon highs could be 5-10 degrees above normal and Sunday still looks to be the warmest day ahead of our next cold front. Thereafter a closed upper low is advertised to move INVOF far W TX-SW NM as a secondary surge of cold surface air arrives Tue. The upper low is expected to have moved e by Thur leaving cool dry conditions in its wake, except warmer along the far swrn reaches of the Trans Pecos.
Temperatures cool and wind speeds increase Sunday as a low pressure system deepens near southern California. Expect much cooler temperatures with a chance for valley rain and mountain snow. Sunday, temperatures will dip a couple of degrees cooler with clouds increasing through the day and gusty southwest winds by the afternoon.
A cold front will sweep through the region lowering snow levels and snow is expected to accumulate along the east slopes of the wa cascades and also in the blue mountains. The low pressure system and its cold front are forecast to push east tonight with lingering snow showers over the eastern mountains expected.
A low pressure system is pushing NW to SE across the region. A cold front will sweep through the region lowering snow levels and snow is expected to accumulate along the east slopes of the wa cascades and also in the blue mountains. The low pressure system and its cold front are forecast to push east tonight with lingering snow showers over the eastern mountains expected.
An upper-level trough will bring a chance of showers this afternoon, but it should be dry behind this feature tonight and Sunday.
542 AM EST Sat Feb 8 2020 Weak low pressure will support light snow chances through tonight.
Colder air will once again spread across the Great Basin region this weekend as low pressure moves in from the north.
A cold front currently sagging south near the Coastal Plains will stall in that area during the day as southerly lower level flow begins to strengthen. This is in response to a closed upper level low currently over the Pacific Northwest that opens up into a trough while dropping south over the Great Basin causing surface pressure falls over the Plains.
Main concern for this period will be the low level wind shear anticipated tonight for all three terminals as a cold begins to edge in from the north. Cold front could reach KGUY as early as 3 am tonight. Northwest flow aloft will gradually become more zonal as a transient low amplitude ridge dampens ahead of the next upper trough. This trough can be seen on water vapor imagery digging southeast into the Pac Northwest.
532 AM CST Sat Feb 8 2020 High pressure was located over northern Lake Superior early this morning with a trough of low pressure extending from central Wisconsin back into central Minnesota. Additionally, a warm front was draped across the Dakotas extending from an area of low pressure along the Saskatchewan/Manitoba border. Price, Iron and Ashland Counties may trend a few degrees cooler tonight depending on the timing of the incoming clouds.
949 AM EST Sat Feb 8 2020 Weak low pressure will support light snow chances through tonight.
426 AM CST Sat Feb 8 2020 Dry and milder weather is in store the Midsouth today, as a broad longwave trof axis over the Ohio and Tennessee River valleys lifts to the east. Tonight and Sunday will see a transition from northwest to southwest flow aloft, downstream of a closed low over the desert southwest.
352 AM CST Sat Feb 8 2020 An upper trough is over the Mississippi River and another trough is over the Pacific Northwest. Temperatures today across West Texas and southeast New Mexico are expected to warm up from yesterday with highs ranging from the upper 50s across Scurry County to the lower 80s along the Big Bend. The upper trough over the Pacific Northwest digs southward Sunday over southern California. A trough moving over the Upper Midwest will send a cold front south toward the area on Sunday.
424 AM CST Sat Feb 8 2020 Dry and milder weather is in store the Midsouth today, as a broad longwave trof axis over the Ohio and Tennessee River valleys lifts to the east. Tonight and Sunday will see a transition from northwest to southwest flow aloft, downstream of a closed low over the desert southwest.
653 AM CST Sat Feb 8 2020 Warmer air continues to move into the area this morning. Water vapor loop also indicated another upper trough over the Pacific Northwest. Upper trough will move into southern CA by 00Z Mon. Upper level jet on the south and east side of upper trough will nose into SD later this morning and into NE Sat night. Another upper trough extended from northern BC to southern Northwest Territories. This trough will sweep across the forecast area for Sun. Little if any precipitation is expected with upper trough.
739 AM EST Sat Feb 8 2020 Weak low pressure will support light snow chances through tonight.
Broad area of upper troughing extends from the Mid Mississippi Valley into the Northeast CONUS. At the surface, high pressure is centered over eastern KS with Lee troughing starting to strengthen over eastern CO. This will allow lee troughing to continue deepening and provide decent return flow across the Southern and Central Plains. The northern stream wave will push a cold front through the area during the day Sun. Also expecting some gusty north/nw winds behind the cold front Sun with gusts over 30 mph.
/issued 352 AM CST Sat Feb 8 2020/ An upper trough is over the Mississippi River and another trough is over the Pacific Northwest. Temperatures today across West Texas and southeast New Mexico are expected to warm up from yesterday with highs ranging from the upper 50s across Scurry County to the lower 80s along the Big Bend. The upper trough over the Pacific Northwest digs southward Sunday over southern California. A trough moving over the Upper Midwest will send a cold front south toward the area on Sunday.
This moisture is falling just ahead of an approaching cold front. Little impacts are expected in the valleys as road temperatures are around to slightly above freezing and not to mention that actual temperatures will rise into the mid 30s by mid morning.
414 AM MST Sat Feb 8 2020 Short wave ridging will quickly track across Colorado this morning as flow aloft backs to the west. Across the Urban Corridor and eastern plains, a cold front will drop south tonight. Snowfall for the mountains through tonight is expected to be 2 to 6 inches with up to an inch across the lower elevations. A cold front will push through eastern Colorado Saturday night and will shift low level winds to the northeast during the day Sunday. Roughly 4 to 10 inches of snow are expected with higher amounts along the mountains ridges and passes.
432 AM CST Sat Feb 8 2020 Low pressure will move across the southern part of the state later today bringing some banded snow with it. While the thinking is the precip will likely shut off at that point, there could be periods of freezing drizzle. North to northwest winds immediately behind the low will gust as high as 35 mph Sunday morning.
Today through Sunday An upper level ridge will move into the Central Plains this morning, drawing southerly low level flow into the region.
400 AM PST Sat Feb 8 2020 Cooler this weekend with windy conditions.
Northwest flow aloft will gradually become more zonal as a transient low amplitude ridge dampens ahead of the next upper trough. This trough can be seen on water vapor imagery digging southeast into the Pac Northwest.
Warm and dry trend through Saturday as high pressure shifts westward over Central California.
Models rmn consistent keeping the highest PoPs/QPF focused ovr the NW half of the FA durg the day, then bcmg widespread area wide Sun ngt as the fntl bndry moves into the FA.
With the main portion of the trough remaining to the west, areas east of the divide will likely not see precipitation from this system as it passes. The trough will be able to bring a weak cold front across the state tonight and tomorrow, with gusty west winds across the Wind Corridor from RKS to CPR today, and gusty northwest winds across the Big Horn Basin tonight, with moderate north winds for the central and southern lower elevations on Sunday.
Temperatures will then trend slightly cooler through mid week with unsettled conditions persisting. Light lake effect snow showers continue to weaken through the morning hours as the low level flow begins to turn west and southwest ahead of another approaching system. Generally fair weather and diminishing winds are expected this morning as surface ridging builds in from the Ohio Valley. A weak cold front slipping southward from upstate NY will result in clouds being the dominant feature today over the northern half of the state with some clearing south. Highs will range from the upper 20s north to the low 40s across the Lower Susq Valley. A weak system of low pressure may kick off a few light snow showers during the day on Sunday, especially along the spine of the Laurels and into northeast PA.
This boundary will be the focal point for heavier rain through the week, as upper low across the desert southwest opens and takes several days to move into the southeast US. Another upper trough will pass on Sat.
/issued 426 AM CST Sat Feb 8 2020/ Dry and milder weather is in store the Midsouth today, as a broad longwave trof axis over the Ohio and Tennessee River valleys lifts to the east. Tonight and Sunday will see a transition from northwest to southwest flow aloft, downstream of a closed low over the desert southwest.
First part of the work week looks quiet, as high pressure drifts across the Midwest.
359 AM CST Sat Feb 8 2020 High pressure was located over northern Lake Superior early this morning with a trough of low pressure extending from central Wisconsin back into central Minnesota. Additionally, a warm front was draped across the Dakotas extending from an area of low pressure along the Saskatchewan/Manitoba border. Price, Iron and Ashland Counties may trend a few degrees cooler tonight depending on the timing of the incoming clouds.
Chattanooga Airport, TN 45 30 57 45 57 / 80 10 0 60 100 Knoxville McGhee Tyson Airport, TN 39 29 55 43 55 / 70 10 0 40 100 Oak Ridge, TN 43 28 55 43 55 / 40 10 0 60 100 Tri Cities Airport, TN 41 27 52 38 52 / 40 30 0 30 100 NC.
/This Afternoon/ The morning visible satellite imagery indicates that the narrow areas of low AC cigs over portions of extreme NE TX/SE OK/SW AR/N LA continues to slowly dissipate, with this trend expected to continue this afternoon as weak elevated isentropic ridging weakens in response to a more zonal flow developing over the Srn Plains and Lower MS Valley. The 16Z temps are also trending a bit warmer than forecast, and thus did raise temps 1-2 degrees areawide to account for strong insolation with the thinning AC shield, and ahead of the advancing cu field from the SW. However, southerly winds will return across the region after 21z, and a warm front will move towards the region late in the TAF period.
High pressure builds across the Carolinas tonight and down the southeastern seaboard on Sunday. High pressure combined with an inverted coastal trough will result in strengthening northeasterly winds on Sunday.
Latest surface analysis places a cold front from Chicago south through Paducah, Kentucky, and back through Memphis. /issued 426 AM CST Sat Feb 8 2020/ Dry and milder weather is in store the Midsouth today, as a broad longwave trof axis over the Ohio and Tennessee River valleys lifts to the east. Tonight and Sunday will see a transition from northwest to southwest flow aloft, downstream of a closed low over the desert southwest.
High pressure weakening over the region allows winds and seas to slowly subside today.
Chattanooga Airport, TN 30 57 45 57 53 / 10 0 60 100 80 Knoxville McGhee Tyson Airport, TN 29 55 43 55 50 / 20 0 40 100 90 Oak Ridge, TN 28 55 43 55 49 / 10 0 60 100 80 Tri Cities Airport, TN 27 52 38 52 47 / 30 0 30 100 90 NC.
1031 AM CST Sat Feb 8 2020 As a low pressure syatem over the lower Great Lakes moves away, flurries should come to an end this afternoon. LAPS sounding suggest may be mix with freezing drizzle at times, but only Fulton County is reporting any road issues late this morning. First part of the work week looks quiet, as high pressure drifts across the Midwest.
Also expect clearing by this afternoon as a low level ridge moves into the area. Available model suite is still showing an upper trough dropping southeast out of northern Plains tonight. The precipitation will become widespread on Sunday into Sunday night when the forcing is maximized as the upper trough moves across the Midwest and the attendant cold front moves southeast across Missouri and Illinois. Based on forecast soundings, still favor the rain/snow line starting out around the Mississippi river around 6 am and then moving east of the area by late morning as warmer air continues to move into the area.
1106 AM EST Sat Feb 8 2020 Currently - Cold front has moved out of the region and settled to our south and east. Temperatures this morning bottomed out in the low to mid 60s and have remain nearly steady, especially in the Lower and Middle Keys. Meanwhile, high pressure will continue to move northeast and emerge later this afternoon over the Atlantic. At the same time, another high pressure cell over the Central Plains will move eastward and reinforce the first high pressure. High pressure will move out over the Atlantic from the southeastern US and get reinforced by another high pressure quickly moving east from the Central Plains.
Low level flow will veer northeast as high pressure becomes elongated along the Carolina coast. Northerly winds around 10-15 knots this morning will veer northeast and diminish to 10 knots or less this afternoon as broad high pressure becomes centered near the Carolinas.
High pressure is building over the region, and is gradually clearing skies. The period begins with South Florida under the influence of a zonal, low amplitude pattern aloft and a surface anticyclone centered over the western Atlantic, just off the Carolina coast. While the low-level flow will aid in advecting a warmer and more moist airmass to the area, deep layer ridging will reinforce mostly dry conditions. By the latter half of the week, a mid-level trough is forecast to swing eastward across the CONUS, inducing cyclogenesis over the South Plains/Gulf Coast states. High pressure is slowly building over the area, which is gradually clearing the cloud cover out.
Temperatures cool and wind speeds increase Sunday as a low pressure system deepens near southern California. Expect much cooler temperatures with a chance for valley rain and mountain snow.