Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 414 PM CDT Wed Jun 28 2017/ A weak upper low just off the Texas coast has provided some enhanced vertical ascent that has resulted in widespread showers and thunderstorms over the Gulf of Mexico. Showers and thunderstorms should spread farther north across the area Thursday as the upper trough moves east along the Gulf coast and a weak front near the coast moves northward.
The regional weather for the rest of the work week will focus on an upper level low over western Canada forecast to move into the Northern Plains.
Upper trough moving east tonight and out of our area Thursday as next upper ridge comes in from the eastern Pacific.
902 PM CDT Wed Jun 28 2017 Water vapor imagery is showing drier air moving into the region (eventually), with upper trough axis just off the coast.
505 PM MDT Wed Jun 28 2017 Current surface analysis shows low pressure over southeast WY, with frontal boundary hanging across southern WY and into the Central Plains. Upper level analysis shows near zonal flow across the region, with upper low across central Canada. Regional radars show showers and thunderstorms have developed across the higher terrain of southern MT and WY, now pushing onto the Plains.
1036 PM MDT Wed Jun 28 2017 Current surface analysis shows low pressure over southeast WY, with frontal boundary hanging across southern WY and into the Central Plains. Upper level analysis shows near zonal flow across the region, with upper low across central Canada. Regional radars show showers and thunderstorms have developed across the higher terrain of southern MT and WY, now pushing onto the Plains.
This change is occurring as high pressure to our east gets pushed from the west by a slow-moving cold front. Temperatures Thursday should be a little warmer than today, but again more noticeable will be the increased humidity. Lows each night will be warmer, closer to normal for the end of June tonight and then a little above Thursday night.
Thursday should be a bit cooler than what we saw today.
Dry conditions overnight will be short lived as a warm front approaches from the southwest bringing rain chances back to the forecast thursday.
A high pressure ridge axis to the north was providing a light easterly gradient wind, hence boundaries pushed into west central Florida early.
Chattanooga Airport, TN 67 82 70 83 / 10 60 30 70 Knoxville McGhee Tyson Airport, TN 64 86 68 82 / 10 20 20 50 Oak Ridge, TN 63 86 68 83 / 10 20 20 50 Tri Cities Airport, TN 55 87 64 81 / 0 10 10 40.
Temperatures will be a few degrees cooler Thursday after weak northerly flow at low levels prevails overnight.
This has caused a nice moistening of the lower atmosphere over northern Missouri and southern Iowa, and primed the area for robust convective development later this evening, likely in the next hour or two. Deep layer shear values approaching 40 kts across the area will combine with the high instability to bring an environment conducive to supercellular development.
Broader valleys and ridgetops will only cool off to the low to mid 60s, which the current forecast has well handled. High pressure remained in control for the day as it continues to shift eastward away from the region. This will allow for warmer temperatures and higher humidity values to start advecting into the region after this point. For tomorrow, temperatures will rise to at or above seasonable normals, in the mid and upper 80s, but higher humidities will make it feel warmer. An upper level low is expected to become closed off along the Gulf of Mexico coast overnight as it slowly shifts northeast through the day Thursday. Mild conditions return for Thursday night, with lows in the mid and upper 60s, with cooler temps expected for the deeper valleys.
With sfc ridging influences shifting ewd and upper level ridging dynamics weakening also, sct shwrs/tstms with bkn ceilings around 5kft in at least vcnty of terminals by 29/18Z-30/02Z, greatest potential CSV. Shifting sfc ridging dynamics ewd and developing frontal system across cntrl plains will result in sfc pressure gradient with sustained sly sfc winds around 10kt and gusts to 20kts at times 29/15Z-30/02Z.
High pressure north of the coastal waters will settle south into the area by this weekend, with light winds and seas continuing.
With sfc ridging influences shifting eastward and upper level ridging dynamics weakening also, sct shwrs/tstms with bkn ceilings around 5kft in at least vcnty of terminals by 29/12Z. Shifting sfc ridging dynamics eastward and developing frontal system across cntrl plains will result in strengthening sfc pressure gradient across mid state with sly sfc winds around 10kt and gusts to 20kts at times 29/15Z-29/24Z.
Brief periods of elevated fire weather conditions are anticipated over and east of the mountains ridges each afternoon and evening. At 130 PM, Low amplitude ridging remained in place over the Southwest US. As expected temperatures are noticeable cooler than this time yesterday, with some locations over the valleys running 10-15 degrees F cooler than this time yesterday. The low stratus currently hovering off the coast should make a push inland after sunset, bringing increasing low cloud cover to the coast and western valleys through early Thursday morning. Patchy dense fog is possible over the higher valley terrain.
/Issued 326 PM CDT Wed Jun 28 2017/ Warm and humid conditions continue through tomorrow with convection focused on the slow moving cold front which will sag further south across the Central Plains on Thursday.
With the upper level ridge axis shifting east and over the area as well as a low to mid level low pressure area over the coast of Texas, lifting and moisture are lacking for much convection this afternoon. The upper ridge continues to plant itself over the region with temperatures warming into the mid 90s and heat indices creeping into the triple digits.
One more mild day for Thursday with widespread highs in the low/mid 50s.
Forecast highlights in the short term period will be a round of snow tonight/Thursday AM followed by cooler temperatures and breezy conditions for Thursday daytime. Following the wave a sfc cold front will push southeast through the area Thu morning/aft, bringing a period of breezy northwest winds and a reinforced shot of cold air.
715 PM MDT Wed Apr 4 2018 Quick update to cancel the High Wind Warnings for I-80 Summit, Arlington and South Laramie Range Foothills early this evening. One more mild day for Thursday with widespread highs in the low/mid 50s.
A warm front continues to slowly lift northward through Washington. Meanwhile, a cold front is approaching the Pacific Northwest and will move inland Thursday afternoon. Ahead of the cold front there is a weak disturbance that will pass over the forecast area late tonight and early Thursday that will produce some light precipitation. There is not much cold air associated with the cold front so snow levels will remain high and there will not be much wind associated with it.
As the high continues to slide off to the east this evening, expect a couple disturbances to bring small rain/snow chances to the area tonight into Thursday. Large area of high pressure /ridge/ builds in for first part of the weekend so lowered minimum temperatures in favored cold spots where winds could decouple and snow pack will allow big drops.
Lows tonight will be much warmer than recent days as a strong low- level jet develops in response to a weak upper wave to the northeast and some cirrus streams overhead. Warm air advection through the morning Thursday brings much warmer temps, though a weak cold front settles in during the day.
The deep layer mean ridge has "flattened", with a deep prevailing westerly flow evident across the Gulf basin from evening upper-air data. A weakening cold front has entered the northern and western Gulf of Mexico, with a continental high pressure cell over the central United States. /Chesser March 2018 was cooler than average across the Florida Keys. Total rainfall for March 2018 was near average in the lower Keys and below average for the middle and upper Keys.
810 PM EDT Wed Apr 4 2018 High pressure will build from the Northwest Tonight, with skies clearing from Northwest to Southeast. With the flow becoming more Northerly overnight, the relatively warmer Atlantic air will advect over Coastal Northeast Florida, helping hold readings up into the 50s.
The cold front will continue to move southeast of our area throughout the night, with much drier and cooler air being advected southeastward.
/Issued 318 PM EDT Wed Apr 4 2018/ Overall a quiet few days on tap with mostly clear skies and freezing or near freezing temperatures expect tomorrow morning.
May see some wind gusts over 20 mph the next couple of hours near the coast, but this will diminish by sunset as the center of the high moves closer to the region. Winds will continue to diminish this evening, but not expected to become completely calm areawide, since the high is expected to move east of the region.
1147 PM CDT Wed Apr 4 2018 Widespread frost/freezing still anticipated later tonight as chilly high pressure settles into the lower OH Valley.
Dry and cool north flow continues through tonight in the wake of today's cold front.
Fairly uneventful next 24 to 36 hours with midlevel clouds filtering through the area and perhaps a few flurries to the north of the highway 14 corridor this afternoon and over northwest Iowa this evening. With some spread in temperature guidance (the EC ensemble mean remains above the envelope max of the GFS ensemble) will hedge toward the lower end given the snowcover in place.
as high pressure pushes away from the region. temperatures look to be warmer tonight compared to last night as clouds push into the CWA and also dewpoints begin to climb back into the mid 20s/30s with the return of southerly low level winds. Lows tonight look to be around freezing within the normal cold locations to near 40 degrees in parts of Eastern Oklahoma. Within the higher terrain locations of far Northwest Arkansas. With the expected isolated/patchy of any frost/freezing conditions will continue to hold off on any frost/freeze headlines.
West of Springfield, temperatures should remain above freezing, however, some frost is possible. Much warmer temperatures are expected for Thursday with highs in the upper 50s to lower 60s. Canadian high pressure shifting east will allow for southerly breezes to commence later tonight and continue through Thursday and Thursday night.
A big ol' dry high pressure system settles in across the area tonight and this, along with clear skies, near calm wind and dew points in the 20s, will allow for excellent radiational cooling. A generally cool weather pattern is expected to persist through most of the next seven days, as an active upper level Hudson Bay vortex keeps troughing over the eastern United States and a ridge out west.
The flow aloft on the backside of this trough will become quasi-zonal over the next 24 hours. The surface anticyclone will shift eastward across the Ohio Valley tonight, resulting in light winds. Many areas are expected to experience temperatures at or slightly below freezing tonight with slightly warmer temperatures in the Memphis metro area and counties south of I-40 and west of I-55.
An H85 thermal ridge was pushing into western Nebraska today, allowing a downslope flow regime to set up and temperatures to rise well into the 50s. Temperatures will be a bit milder compared to this morning as the thermal ridge sits on top of southern Neb and a deck of mid/high clouds continues to overspread the region. Went with the warmer end of guidance to take into account those factors, resulting in mid 20s north and upper 20s/near 30F south. Upslope flow at H85 will help with increased cloudiness and moisture advection, while a weak warm front lies across the NE/KS border. Nebraska remains primarily in northwest flow aloft with the rotating upper lows around Hudson Bay and a strengthening ridge over the Western U.
744 PM EDT Wed Apr 4 2018 A cold front will cross the region this evening bringing strong winds, especially across the higher terrain.
Chattanooga Airport, TN 33 64 44 66 / 0 0 10 40 Knoxville McGhee Tyson Airport, TN 32 62 42 66 / 0 0 10 30 Oak Ridge, TN 31 63 43 65 / 0 0 10 30 Tri Cities Airport, TN 29 58 36 65 / 0 0 10 30 TN.
The high pressure area that's moving through the region currently will push east of the area tonight, shifting winds to the south and southwest. This will allow for a nice warmup for Thursday with highs in the low to mid 60s across eastern KS and western MO.
1031 PM EDT Wed Apr 4 2018 A cold front off the coast will continue moving out to sea overnight.
Warmer conditions will occur tomorrow as southeasterly winds prevail.
744 PM EDT Wed Apr 4 2018 Cool and dry conditions will persist through tomorrow with lows tonight in the low to mid 20s and highs tomorrow in the low to mid 40s. Weakening gradient over the area along with development of surface based inversion after midnight will have winds diminishing and allow temps to drop into the low 20s tonight.
For the next several days Indiana will have rapidly changing conditions as high pressure and low pressure alternately control our weather.
Temps early this afternoon range from the lower 30s across northwest SD to near 50 across far southwest SD.
A strong cold front will swing through late Wednesday night and into Thursday morning with colder temperatures, and widespread snow expected through late week. Temperatures will be well above freezing for most locations ahead a surge of cold air from Canada beginning late tonight. Compared to earlier model runs, the low-level arctic air is anticipated to arrive a bit later during the overnight tonight.
There a few meager showers of snow occur presently over the high mountains. Temperatures across the area will continue slightly warmer than normal.
850 PM EDT Wed Apr 4 2018 A cold front will cross the region this evening bringing strong winds, especially across the higher terrain.
Frost is still on tap for late tonight with lows at or just below freezing for the area.
However, the next weather system will start to bring in some mid level cloud cover overnight with models suggesting the better lift and moisture will be north of I-74 on Thursday, thus the higher chance POPs are located mainly across the north half of the forecast area. Temperatures tonight will drop into the lower 20s over our northern counties with mid to upper 20s common over the remainder of the forecast area. A cool and active weather pattern will hold over our area through this period with several low amplitude waves progressing east- southeast and then amplifying as they are forced southeast into the mean longwave trof position over Hudson Bay.
/Issued 705 PM EDT Wed Apr 4 2018/ Overall a quiet few days on tap with mostly clear skies and freezing or near freezing temperatures expect tomorrow morning.
Although there has been an increase in clouds with this system, very dry air in the low levels of the atmosphere has kept any stations from recording any snow.
A strong cold front will swing through late tonight into Thursday morning with colder temperatures and produce widespread snow expected through late week. Temperatures will be well above freezing for most locations ahead a surge of cold air from Canada beginning late tonight. Compared to earlier model runs, the low-level arctic air is anticipated to arrive a bit later during the overnight tonight.
748 PM EDT Wed Apr 4 2018 Aviation One area of low pressure will track away from the region tonight taking the snow showers and wind with it. A weak area of high pressure will track through on Thursday resulting in mainly a dry and less windy day. The snow showers will continue to diminish this evening as the storm system pulls away and the low level convergence weakens. Above freezing highs are forecasted on Thursday as the next storm nears from the west northwest.
Otherwise, building high pressure will gradually depress the snow showers and remaining gust potential through the evening and into the overnight.
913 PM CDT Wed Apr 4 2018 High pressure over the Mississippi River valley should keep conditions quiet tonight with decreasing winds. We might see a few showers tomorrow evening going into Thurdsay night as moisture return increases and possible warm front moves north.
807 PM EDT Wed Apr 4 2018 A cold front will push off the coast tonight.
757 PM EDT Wed Apr 4 2018 High pressure will be in place across the region tonight. A weak area of low pressure will bring the chance for some light precipitation mainly along and north of Interstate 70 Thursday evening into Thursday night.
replaced by dry high pressure. May see some wind gusts over 20 mph the next couple of hours near the coast, but this will diminish by sunset as the center of the high moves closer to the region. Winds will continue to diminish this evening, but not expected to become completely calm areawide, since the high is expected to move east of the region.
649 PM MDT Wed Apr 4 2018 Northwest flow aloft will continue over the central plains downstream of a ridge axis centered over the Great Basin. A weak cold front will slide into the local area during the day on Thursday. However, it will have minimal impact, with only slightly cooler temperatures north and east of the front.
Sfc ridging in place over the region will quickly shift E into the TN Valley this evening, with a SSE low level flow returning over the area after 12Z Thursday. Cloud cover will be increasing from the west around sunrise, so this may hold temperatures just a few degrees warmer across portions of East Texas.
A low pressure system crossing southwestern South Dakota may generate some flurries tonight, but little to no accumulation is expected. Nevertheless, even with reduced snow cover, an associated cold front with the second low will inhibit temperatures from recovering significantly.
Weak cold front currently north of the area will push southward across central Florida into tonight. Isolated showers that developed ahead of a prefrontal trough have pushed offshore this evening, and a band of light rain that was nearing Lake and Volusia counties has weakened. May also see an additional storm or two develop over the warmer waters of the Gulf Stream overnight as the front moves through. Northerly wind surge will occur across the waters tonight behind a passing weak cold front, with wind speeds nearing 20 knots.
Snow showers should continue to diminish as high pressure builds in overnight.
Clear skies and falling dew points on E winds at a few sites and high pressure centered in central AR. Sfc ridging in place over the region will quickly shift E into the TN Valley this evening, with a SSE low level flow returning over the area after 12Z Thursday. Cloud cover will be increasing from the west around sunrise, so this may hold temperatures just a few degrees warmer across portions of East Texas.
Tomorrow will be a warmer day, but winds look to relax in the west where the lowest humidity and warmest temperatures are expected.
626 PM CDT Wed Apr 4 2018 Widespread frost/freezing still anticipated later tonight as chilly high pressure settles into the lower OH Valley.
710 PM CDT Wed Apr 4 2018 Updated for 00Z aviation discussion 00Z TAF discussion: VFR conditions are expected through the next 24 hours as high pressure nudges into the region tonight and then starts to exit to the east during the day tomorrow. The evolution of high pressure will result in generally light north to northeast winds, transitioning to east and southeast morning through midday tomorrow, and then to southerly by tomorrow afternoon. Latest rap and satellite imagery showed an upper flat trough over the Mississippi Valley Region. So we may not decouple completely in the low levels. Readings will be from the middle 60s to the lower 70s. With 30s and 40s dewpoints minimum humidity will dip into the lower to middle 20s across portions of the east.
This drier air in the mid-levels has also resulted in warmer temperatures.
/Issued 335 PM CDT Wed Apr 4 2018/ Well below normal min temps again tonight, though any freezing temps are expected to be isolated and confined to the coldest valleys.
Cooper Main concerns in this forecast cycle are lows tonight with spotty freezing temperatures over parts of northern AR.
A large trough will move into the Great Basin this weekend, bringing a widespread threat of precipitation with potential for significant amounts.
As a lee trough deepens ahead of this feature, gusty west/southwest surface winds have developed across parts of southern Colorado. Temperatures will be similar to today, with highs reaching the low to mid 70s across the plains, and mid 60s in the high valleys.
Northwest flow aloft will continue over the central plains downstream of a ridge axis centered over the Great Basin. A weak cold front will slide into the local area during the day on Thursday. However, it will have minimal impact, with only slightly cooler temperatures north and east of the front.
1013 PM EDT Wed Apr 4 2018 High pressure will be in place across the region tonight. A weak area of low pressure will bring the chance for some light precipitation mainly along and north of Interstate 70 Thursday evening into Thursday night.
A weak cold front will move through the forecast area tonight. Temperatures should remain on the warmer side through the night. Even with the cold front, the temperatures on Thursday will be about the same as today.
750 PM EDT Wed Apr 4 2018 A cold front will move east of the Midlands this evening.
Skies are mostly clear except for the northern Door Peninsula where the back edge of the cyclone's cloud shield is in the process of exiting. Despite the ridge axis arriving, winds may struggle to decouple in spots. Winds will shift to the southwest, which should result in warmer temps.
100 AM EDT Thu Apr 5 2018 Cool and dry conditions will persist through tomorrow with lows tonight in the low to mid 20s and highs tomorrow in the low to mid 40s. Weakening gradient over the area along with development of surface based inversion after midnight will have winds diminishing and allow temps to drop into the low 20s tonight.
The period will begin with an area of high pressure just to our east and weak trough aloft.
Water vapor imagery at 18Z shows upper level ridging over the Pacific Northwest, creating northwest flow over western Kansas this afternoon. Temperatures will reach the lower 70s, which is normal for this time of the year. With the deepening surface lee trough in eastern Colorado, southerly wind speeds will reach 15-20 mph sustained, with gusts up to 35 mph. Relative humidities in the lower 20s this afternoon will make for a low-end risk of fire danger for our central zones through about 0Z. Temperatures will dip into the lower 40s, which is again, normal for this time of the year.
A weak cold front will drift into Wrn Neb, perhaps disrupting the radiational cooling process.
336 PM CDT Mon Oct 16 2017 Upper level ridging will dominate the weather tonight and Tuesday.
356 PM CDT Mon Oct 16 2017 Elongated area of high pressure extends from the New England states south into Texas this afternoon. The cold front has stalled over the central gulf this aftn with storms contg in this area.
Increased cloud cover/rainfall will lead to slightly cooler conditions Tuesday, with highs ranging from upper 70s across Volusia to low to mid 80s farther south. High pressure situated over the DelMarVa early Wed will remain situated over the same general area through the end of the work week with continued onshore winds over the peninsula. High pressure along the NE to Mid Atlc seaboard will continue a general onshore flow pattern with eventual airmass drying indicated as higher upstream moisture over the Atlc basin undergoes subsidence related drying. Seasonal highs in the low 80s along the coast, mid 80s inland, with slightly above average mins in the low to mid 70s through the period.
16/12Z TAF CYCLE VFR conds wl prevail thru the PD as high pressure prevails over AR. Today Through Tuesday Night Cooler and drier airmass contd to advect SWD into AR overnight, following the passage of a CDFNT on Sun. Expect another chilly night tonight, with light winds/clear skies, with lows in the lower/mid 40s.