Aikyam-Lab/Synoptic-Bench huggingface dataset:
945 AM CDT Thu Apr 20 2017 There continues to be rain along the I-94 corridor, and that will slowly pivot off to the northeast as the low pressure system pulls away from the area. Water vapor loop indicated an upper level trough over west central MN. Also an upper level trough was located over central SASK. Another band of rain was located over central and western ND with SASK trough. A cold front will move out Canada Sat and bring the next batch of rain.
502 AM MDT Thu Apr 20 2017 Current surface analysis shows low pressure over eastern Iowa, with weakening area of low pressure also over southern Manitoba. Upper level analysis shows trough over eastern ND and northern MN, with showers now northeast of the CWA.
This is due to a weak pressure pattern under low pressure moving across southern Wisconsin. Once the low moves east later this morning, increasing westerly wind will improve conditions to MVFR levels by early afternoon. Low pressure will track across southern Wisconsin this morning, exiting to the east by noon. Cooler and drier air will filter into the area in the wake of the exiting low. The southeast won't see this cooler air as quickly and should still be able to achieve highs in the mid 60s. High pressure building in tonight brings us clearing skies and lows in the mid to upper 30s.
1020 AM EDT Thu Apr 20 2017 An approaching cold front will bring showers and thunderstorms through tonight, followed by cooler temperatures into the weekend. This will help increase low level instability, and with increasing shear with the approach of a mid level closed low over the Great Lakes will help fire showers and thunderstorms with an approaching front. Cold front crosses region toward sunrise Friday morning as cooler and drier air works southeast behind the front.
Chattanooga Airport, TN 83 62 83 62 / 30 20 60 50 Knoxville McGhee Tyson Airport, TN 83 62 80 61 / 30 20 60 50 Oak Ridge, TN 84 61 79 61 / 30 30 60 60 Tri Cities Airport, TN 79 58 77 57 / 50 30 70 60.
625 AM CDT Thu Apr 20 2017 08z/2am surface map shows 1008mb low over northeast Iowa with a cold front trailing southwestward to Oklahoma. Lows will range from the lower 40s far north. to the lower 50s far SE. Models have been consistently shifting the low track further south and the 00z Apr 20 suite is no exception.
858 AM EDT Thu Apr 20 2017 An approaching cold front will bring showers and thunderstorms through tonight, followed by cooler temperatures into the weekend. This will help increase low level instability, and with increasing shear with the approach of a mid level closed low over the Great Lakes will help fire showers and thunderstorms with an approaching front. Cold front crosses region toward sunrise Friday morning as cooler and drier air works southeast behind the front.
608 AM CDT Thu Apr 20 2017 The cold front is sloooowly working it's way through the forecast area this morning. Cooler temperatures can be expected today with northerly winds as a high pressure area passes through.
An upper level trough will give showers and a slight chance of thunderstorms today. An upper level ridge will build offshore tonight and move over Western Washington on Friday bringing sunny and warmer weather.
Showers will diminish this morning as high pressure builds over the region. Building high pressure will bring a prompt, albeit brief, pattern change to northwest California through the remainder of the work week. Showers, however, will continue to dissipate this morning as 500mb heights rise with the ridge of high pressure shifting over the region.
High pressure will then bring lighter winds and warmer days through the weekend. Water vapor loop is showing a trough of low pressure moving into northwestern Arizona and Utah this morning. These winds will be stronger due to a passing trough that will coincide with peak mixing due to daytime convection. A weak cold front will move across the area in association with this trough, however temperatures with the new airmass will be so similar to current conditions that the wind shift may be the only indication of frontal passage without instrumentation. As the trough moves eastward a ridge of high pressure will build in over the weekend allowing for warm temperatures and clear skies, along with light winds for the weekend.
622 AM CDT Thu Apr 20 2017 88D mosaic this morning showing thunderstorm activity still on going along a cold front in eastern KS. cool through the weekend with highs generally in the mid 60s and lows in the low 40s.
347 AM CST Wed Nov 8 2017 Yesterday's cold front has cleared the coast (Galveston's winds shifted from the southwest to the west northwest at 12:45 AM), and 3 AM temperatures are all now under 70 degrees. The area will continue to cool down during the remaining overnight hours with sunrise temperatures ranging from the 50s inland to the lower/mid 60s at the coast. Overall, the second week of the month will be much cooler than the first week of the month. 42 Cold front will continue pushing southward thru the coastal waters this morning. 47 Cold front has pushed off the coast.
/issued 1002 PM CST Tue Nov 7 2017/ The cold front has finally cleared the region to the S into far SE TX and Cntrl LA this evening, with the post-frontal cooler air slowly beginning to deepen in its wake across the area. However, our focus will shift to our W late tonight as areas of SHRA develops over Wrn and N TX, ahead of an upper trough now entering the Four Corners Region. As for min temps, did make some minor downward tweaks per the 03Z obs, which were 1-2 degrees cooler than the gridded temps.
Until then look for lingering showers across the higher elevations of eastern Arizona, mainly near the White Mountains.
500 AM EST Wed Nov 8 2017 Under mostly clear skies and light northeast to east winds, temperatures are holding in the lower to mid 70s along most of the island chain. Surface wise, a broad, elongated area of high pressure is holding across the northern portion of the Florida peninsula with a trough of low pressure lingering from the Bahamian chain southward into the Caribbean Sea.
218 AM EST Wed Nov 8 2017 Low pressure tracks across southern areas this morning. Cooler air moves in for the end of the work week.
Model indications are that clearing may be delayed until passage of a mid level trof axis. On visible satellite, starting to see a few breaks in the low clouds in our far northern counties, with mainly broken mid level clouds north of our region. This area of high pressure will slowly slide southeast with time. As this occurs, much drier air will filter down into the area along with cooler temperatures. Therefore, we should see clouds continue to decrease from north to south across the region as northeast winds keep temperatures in the lower 50s. The aforementioned high pressure system will briefly situate itself overhead early on Thursday before a dry frontal boundary moves through late in the day. This reinforcing high will bring even cooler air and highs will likely stay in the upper 40s for good part of the region.
Meanwhile, winds at the surface will be from 8 to 15 mph from the north with the highest winds likely confined to to GLH/GWO where some surface gusts through the period could reach up to 20 mph at times. /BB/ Main focus tonight continues on the cold front slowly trudging southward through our area. Cooler air has begun to filter in behind the front, with temps in the northern counties already in the low to mid 50s.
The cooler air mass will remain over the central plains on Wednesday with another reinforcing push of cooler air arriving on Thursday, as an upper level wave moves into the Great Lakes region. It will be more of glancing blow for Northeast Kansas with respect to the cooler air.
High pressure skirts by to the east Wednesday night. The next system approaches from the west Thursday, with a warm front pushing a warm, moist air mass aloft over top of the cold air in place near the surface. Thermal profiles suggest a greater chance of ice pellets (sleet) than freezing rain across parts of the plains given the warm nose stays well aloft. However, it would only take a small change to result in a more widespread light freezing rain event, so this will bear watching.
A cold front will slowly move into the area Wednesday morning from north to south with winds going from generally calm to northwest. The highest PoPs will lie along and northwest of a line from Valdosta through Panama City. Highs are expected to remain in the lower 80s on Wednesday, but will be much cooler behind the front with highs in the middle 60s and a cool rain expected. Overnight lows will be in the lower 60s on Wednesday night, falling about 10 degrees across the region on Thursday night.
453 AM EST Wed Nov 8 2017 An extensive ridge of high pressure extending from the Mid mississippi Valley to the Mid Atlantic Region and New England States will provide fair and chilly weather today and Thursday.
The low CIGs will remain over the area into Wednesday morning but should see some improvement during the afternoon. a frontal boundary to our south is expected to lift a bit northward and associated shower activity and the low clouds and potentially effect TAF sites.
238 AM CST Wed Nov 8 2017 Upper trough axis along north edge of strong upper jet was sinking southeast into central portions of the CONUS overnight. The next longwave trough rotates southeast around the Hudson's Bay upper low and pushes another Canadian cold front into the area late tonight. With west to southwest flow remaining in place off the surface and some high cloud increase, a somewhat warmer night is anticipated with lows in the mid 20s to around 30.
401 AM EST Wed Nov 8 2017 A cold front crossing the Central Midlands early this morning will push south of the CSRA just after sunrise. Cooler temperatures will overspread the region behind the front.
1107 PM CST Tue Nov 7 2017 140 PM CST Bitterly cold temperatures tonight will be the main forecast challenge in the near term with otherwise quiet weather in place under the influence of high pressure. Northwest winds are in place across northern Illinois and northwest Indiana, but winds will diminish this evening and overnight as the ridge axis shifts south across the local area.
1055 PM MST Tue Nov 7 2017 06Z TAF CYCLE Two upper level troughs sliding east/southeast through NM tonight. Bands of precipitation associated with each upper trough located across eastern NM. Both troughs shift east or southeast of the state Wednesday. Around 2 to 4 inches of snow with locally higher amounts are expected across the high peaks of the Sangre de Cristos, with lesser accumulations across the northeast plains.
The high resolution models shows this continuing for the overnight hours.
1051 PM CST Tue Nov 7 2017 The cold front has not pushed all the way through South central Texas and is currently from an Eagle Pass (K5T9) to Cotulla (KCOT) to just south of Victoria (KVCT) line. Latest CONSshort advertised about 1-2 degrees cooler across the board than forecast for the low T and decided to go with it based off trends. At 2 PM the cold front was located near a Austin to Fredericksburg line. As the main trough axis and forcing swings through the region Wednesday evening a band of elevated convection is indicated by models to move east out of the Hill Country, through the I-35 corridor, and into eastern counties.
339 AM CST Wed Nov 8 2017 A surface cold front currently draped across southern Manitoba and Saskatchewan will sag into and across North Dakota and northern Minnesota through the late forenoon and afternoon hours producing cloudy skies and widespread light snow. From one to two inches of snow is expected today mainly along and north of the Highway 200 corridor, with Trace to one inch snowfall amounts south of the Highway 200 corridor.
1229 AM EST Wed Nov 8 2017 Aviation A high pressure ridge will continue in control of the weather tonight through Wednesday evening and bring fair and seasonably cool weather. A strong cold front will bring rain showers Thursday that will become mixed with and then change over to light snow showers and flurries as colder air quickly moves in behind the front.
1030 PM MST Tue Nov 7 2017 High pressure will be over Wyoming tonight through Thursday morning.
1002 PM CST Tue Nov 7 2017 The cold front has finally cleared the region to the S into far SE TX and Cntrl LA this evening, with the post-frontal cooler air slowly beginning to deepen in its wake across the area. However, our focus will shift to our W late tonight as areas of SHRA develops over Wrn and N TX, ahead of an upper trough now entering the Four Corners Region. As for min temps, did make some minor downward tweaks per the 03Z obs, which were 1-2 degrees cooler than the gridded temps.
1225 AM EST Wed Nov 8 2017 A cold front near the north part of the forecast area will sink southward and through the area tonight.
With ample insolation today, have trended temps toward the warmer guidance, despite the CAA across the region. Areas that will have light/calm winds tonight, have trended aob the cooler guidance. Northern portions of the CWA will see winds pick up from the SW late tonight with some high clouds associated with an approaching upper trof. However, have still trended twd the cooler guidance and expect temps to drop slowly or level late tonight.
A weak upper level ridge over our area this morning will shift east this afternoon and tonight, to be replaced by warmer and increasingly moist southwest flow aloft associated with an upper level trough centered off the Washington/Oregon coast.
Rather impressive 3 hour pressure falls were noted over the higher terrain with values in the 5-6/mb 3hr pressure falls noted. \/Hodanish Upper ridge will control southern Colorado weather through the period. By Thursday the ridge will flattened, providing moderate west to east upper air flow, while relatively weak pressure gradient at the surface yields light to moderate winds during the days and light winds during the nights.
Minor changes made to overnight lows, mainly across northern Beltrami and souther Lake of the Woods counties where temps will likely be the coldest with the higher snow depths. Light snow will spread into areas north of highway 2 by later Wednesday morning, dropping into the highway 200 corridor during the afternoon. Still looking like an inch or so of snow along the highway 2 corridor, tapering down to almost nothing over the southern Red River Valley. A broad upper level trof slides south out of Canada to start the period with chances for light precipitation and cooler temperatures. The pattern becomes a little more progressive by Thursday as the upper trof quickly shifts east into the Great Lakes region. and a digging trof off the Pacific coast will help enhance broad ridge amplification over the area.
400 AM EST Wed Nov 8 2017 High pressure will extend across the region into Thursday. A cold front will sweep across the area Thursday night. Canadian high pressure will build in for the end of the week. Ridge of high pressure will extend across the area until Thursday afternoon when it gets shunted off to the southeast as a cold front approaches from the northwest. A cold front will move through Thursday night. Although there will be no precipitation with this system, there will be a noticeable change in temperatures with much cooler air working into the region.
Clearing skies and cold advection will allow lower temperatures to fall around 5 degrees cooler than expected earlier. The cold front we've been talking about over the last several days has finally reached northern Colorado and will continue to drop southward through the evening hours. Some heavier precipitation is expected as the front moves through with rain for the low elevations and snow for the high. Once the front and upper level trough push through, accumulating snowfall will end which is expected to occur around midnight. Northwesterly flow will keep pumping in cooler air from the north which should keep temperatures at or below normals for a few days. Thanks to the ridge, expect clear and sunny skies.
It'll be "clear sailing" the rest of the week, as broad mid-upper deck ridge spreads east from the Northern & Central Rockies across the Northern Plains. Although temps will still be below normal, there will be somewhat warmer weather for all areas during these periods. /Canadian border will push the lower-deck trof axis east that should cross KS Sat afternoon & evening. The warming trend continues Sat & Sun before the next "cold front" arrives. Aviation concerns are expected to be on the low side through the next 24 hours.
Cold front continues to push southward around 15 mph along a line from Port Lavaca to Cotulla at 05Z.
1257 AM EST Wed Nov 8 2017 Issued 1254 AM EST Tue Nov 7 2017 High pressure will build across the region today providing mainly sunny skies and cooler than normal afternoon highs in the mid to upper 40s. Clouds will begin to increase later tonight into Thursday as a strong cold front approaches.
1037 PM MST Tue Nov 7 2017 Deep westerly flow is in place in the mid and upper levels across the Central High Plains, with a positively tilted trough extending from the Great Lakes to the Great Basin. This afternoon-Tonight: The mid/upper level trough over the Great Basin is expected to move southeast overnight (some timing differences in models). A cold front looks to move though the area overnight Wednesday and into early Thursday morning. No precipitation is expected with this front; however, this will result in slightly cooler high temperatures on Thursday.
1129 PM CST Tue Nov 7 2017 The cold front was approaching KLBX and KGLS at 0530Z. The high resolution models show the rain chances increasing at KCXO by 14Z and then the Houston metro sites after 17Z. /ISSUED 925 PM CST Tue Nov 7 2017/ A cold front extends from about Edna to Houston Hobby to Jasper. Colder air will filter into the region overnight and low temperatures tonight will be 15 to 20 degrees cooler than the past couple of nights.
435 AM EST Wed Nov 8 2017 Issued 1254 AM EST Tue Nov 7 2017 High pressure will build across the region today providing mainly sunny skies and cooler than normal afternoon highs in the mid to upper 40s. Clouds will begin to increase later tonight into Thursday as a strong cold front approaches.
141 AM EST Wed Nov 8 2017 Low pressure tracks across southern areas this morning. Cooler air moves in for the end of the work week. Southeast OH, northeast KY, and northern WV lowlands should be a bit warmer than southern WV, where clouds hang on. This will create a good temperature gradient across the area with the aforementioned areas getting at or below freezing while east of the Ohio River stays a bit warmer. Strong high pressure builds and shifts across the Upper Great Lakes which, combined with northwesterly flow aloft, brings in the coldest temperatures yet this year.
1232 AM EST Wed Nov 8 2017 High pressure will remain over the region through tonight.
906 PM PST Tue Nov 7 2017 Tranquil and mild weather will prevail as a weak ridge builds into the area through Wednesday.
Strong lift from an upper trough moving east into New Mexico was lifting moist air over the cold air at the surface in West Texas this morning. This will not be the case later this morning, however, as the low levels of the atmosphere saturate and stronger lift develops. Highs in the lower to mid 40s, will be around 6 AM this morning, as temperatures will likely fall 3 to 4 degrees into the upper 30s and lower 40s midday, due to cold advection and cooling from rain. Rain will be ending in northwest sections this afternoon as the upper trough moves east.
1230 AM EST Wed Nov 8 2017 Low pressure will move east tonight, followed by weak high pressure for Wednesday. A moisture starved cold front is forecast to cross the area on Thursday.
Widespread rainfall associated with these troughs will spread across the TAF sites near daybreak and continue through much of the afternoon. /issued 346 PM CST Tue Nov 7 2017/ (Tonight and Wednesday) Expect a wet and much cooler pattern during the next 24 hours.
At the surface, high pressure is fostering light winds, which in concert with the clear sky has allowed temperatures to fall into the low and middle 20s with a few spots across northern Iowa and the Nishnabotna Valley in the upper teens at 3pm. This in combination with 850mb temperatures about 5C warmer than yesterday will provide for a relatively speaking mild day with highs in the 40s. Clouds will begin to increase later this afternoon, especially over northern Iowa, as a strong cold front approaches the Iowa/Minnesota border by 00z.
342 AM CST Wed Nov 8 2017 Surface ridging center over SE Nebraska and NW Missouri this morning allowing for temperatures to drop well into the 20s, perhaps upper teens in some low spots. The current ridge over the area will center just to the east of the area, and become a little more diffuse, which should get some light southerly winds going.
There are a good bit of boundary layer micro-omega(very small areas of boundary layer lift) moving through the area ahead of the slow moving cold front which will cause the visibilities to fluctuate rapidly in these areas as these features move through. Short wave that will move the cold front through the area this morning is currently moving into New Mexico. It will become the base of the upper long wave trough that will be digging into the southern conus finally clearing the area of rainfall first early Thursday then clearing the cloud cover by noon or afternoon Thursday.
Weak high pressure across the N Gulf and Nrn Fl will provide for very light winds.
By 00Z Thursday the cold front should be southwest of the forecast area, with cool high pressure building in from Alberta/Saskatchewan. The area of high pressure should be over eastern ND and extend across all of our forecast area at 18Z Thursday. The lowest temperatures and strongest winds are expected over the northeastern corner of SD and west central MN. The 500mb trough overhead at 00Z Thursday will push across the upper Great Lakes by Thursday afternoon, with a ridge sliding into our area from MT/WY. Expect the 500mb ridge to be over the Northern Plains Thursday night.
/issued 939 PM CST Tue Nov 7 2017/ Low clouds, drizzle of light fog remained entrenched over the Midsouth this evening, north of a cold front that extended from south of Jackson MS to north of Birmingham AL. /issued 307 PM CST Tue Nov 7 2017/ Cool and overcast conditions persist across the Mid-South this afternoon in the wake of the early morning cold front. The flow aloft is quasi-zonal with a strong upper-tropospheric jet core extending from the Central Plains into the lower Ohio River Valley. Skies are expected to remain mostly sunny, but persistent north winds (reinforced by a dry, late-week cold front) will maintain cold advection across the Mid-South and keeping temperatures below normal.
221 AM EST Wed Nov 8 2017 High pressure will build into the region through Thursday. A strong cold front will drop south across New England Thursday night.
Precipitation will be moving into Oklahoma and north Texas from the west and southwest, although initially will be virga due to the low low-level humidity. NAM soundings would also suggest the potential for some wet-bulbing late tonight that might result in some light freezing rain across parts of western Oklahoma. Ground temperatures still quite warm, and with ambient temperatures at or above freezing tomorrow, any snow that does accumulate will quickly melt and not expected to create any significant travel issues.
On Thursday, a noticeable change will be felt when a dry cold front sweeps into the central Plains.
A cold front is south of middle TN and north winds will prevail.
An upper low currently passing through southern California will continue to make its way east across Arizona tonight. The rain will exit the region from west to east on Wednesday as the upper low continues to push east out of our region. Beyond that, high pressure will begin to build back in on Thursday helping us return to our westerly flow.