Aikyam-Lab/Synoptic-Bench huggingface dataset:
SSTs across these Atlantic waters are in the mid to upper 70s, with the cooler southeastern gulf waters in the low 70s (according to sampling of the NASA Sport). Current temps are in the low 70s, and dew points are in the mid to upper 60s. Ridging in the western Atlantic will gradually give way to a frontal boundary that will slide down the Florida Peninsula this afternoon and overnight.
Temperatures will be slightly warmer on Saturday as southeast to south flow occurs under a dry northwest flow aloft. Canceled the high risk for rip currents. Seas will remain elevated and winds will increase to SCEC levels as high pressure pushes into the Gulf waters.
Lows this morning are in the low to mid 20s. By this afternoon, the lee trough will be deepening allowing for breezy return flow. Winds by afternoon will be breezy and may persist into the early overnight hours ahead of the cold front. The cold front will drop through the area overnight, currently looking to impact Ord and Lexington around 3-4am, and to Beloit/Hebron by 7-8am.
With the richest moisture having been pushed well offshore by this week's cold fronts, dew points will only climb into the 50s.
A weak cold front will sag south through western Washington late tonight and Fri bringing a chance for light precipitation to the northern part of the forecast area.
RGB imagery indicates that the cirrus in the lower MO valley appears to be dissipating as it drops southeast, so still going with a clear sky overnight.
Went slightly cooler than previous forecast in the low to mid 40s.
811 PM EDT Wed Sep 6 2017 Water vapor satellite imagery is showing a weak frontal boundary moving into the Florida Peninsula ahead of an amplified upper level trough. This boundary is on track to bring in slightly drier and cooler conditions to the Nature Coast over the next couple of days. Otherwise, winds will slowly increase Thursday as high pressure builds in behind the front.
1139 PM CDT Wed Sep 6 2017 255 PM CDT Large upper level trough still situated across the region this afternoon and in this pattern, cloud shield has really expanded.
Expect mostly clear skies and cool temperatures overnight with lows mainly in the lower 50s. /27/ Prior discussion below: Today has been quite pleasant with temps so far only reaching into the upper 70s and low 80s as drier and cooler air continues to filter into the ArkLaMiss behind the cold frontal passage. This anomalously cool and dry airmass combined with clear skies and calm winds tonight will allow for exceptional radiational cooling with low temps dropping into the low 50s over much of the area and a few spots possibly reaching the upper 40s in the Hwy 82 corridor.
640 PM CDT Wed Sep 6 2017 Deep mid-level trough along the IL/IN border this afternoon will continue to move slowly east across the Great Lakes through Thursday. With the trough over the upper Ohio Valley by Thursday afternoon, temps should be a bit warmer Thursday and cumulus will likely be a little less plentiful.
At the surface, high pressure currently over the area will move off to the east on Thursday, allowing winds to become light southeasterly during the day. Clear skies, a dry airmass and light winds tonight will result in ideal radiational cooling, with overnight lows mainly in the mid and upper 50s, although a few readings in the lower 50s will be possible in some of the river valleys over southeast sections. Thursday will be sunny and slightly warmer, with afternoon highs mainly in the upper 80s.
723 PM EDT Wed Sep 6 2017 A cold front will remain stalled near the New England coast through early Thursday morning with occasional heavy rain and a few thunderstorms occurring, especially this evening and overnight.
Today was a beautiful and noticeably cooler day as temperatures topped out in the low to mid 70s under partly cloudy skies. Temperatures will warm into the low to mid 70s by the afternoon.
1007 PM EDT Wed Sep 6 2017 A deep upper-level trough will dominate our weather as it slowly lifts to the north.
Lingering cooler air across western WI support another afternoon with cumulus development and scattered showers, much like today. Temperatures in western WI will only be in the low 60s, but warmer air aloft and ample sunshine will lead to mid and upper 70s across western WI. The amplified upper trough will continue progressing east with an expansive high pressure area taking over for late this week and through the weekend. Upper level ridging and southerly flow will lead to warming temperatures.
It will remain cool with lows in the 40s tonight and highs in the lower to middle 60s on Thursday. Main trough axis to continue moving east tonight into Thursday but several short waves on back side will drop southeast.
Dewpoints remain rather low in the low to mid 40s with highs in the low to mid 70s. Should be enough of this wind component to keep low temps a bit warmer in the west. Have boosted temps a bit in step with most guidance for highs in the low to mid 80s with little if any cloud.
953 PM CDT Wed Sep 6 2017 The vast majority of the high-based diurnal cu from this afternoon has dissipated and only patches remain within the cyclonic flow across the region. Glass High pressure continues to build into the region as trough currently over the eastern Great Lakes pushes toward the northeast US. Weak CAA behind the exiting trough and slightly drier air will lead toward trending just below guidance for tonight.
A deep mid/upper trough will continue to progress across the eastern half of the country the next few day, driving cool Canadian high pressure east of the region.
535 PM MDT Wed Sep 6 2017 Latest upper analysis shows a high amplitude ridge over the western half of the CONUS and a trough over the east. At the surface, high pressure is shifting eastward over the great plains states and broad area of weak low pressure is developing over the western states. Tonight and on Thursday, the upper ridge will remain in place over the western CONUS with the upper trough shifting slowly eastward.
831 PM EDT Wed Sep 6 2017 A deep upper trough will keep shower chances in the forecast this evening and during the day on Thursday. Dry conditions are then expected through the weekend as an upper ridge builds into the region. An upper trough digging into the area coupled with enhancement with winds off of the lake has led to scattered shower activity across northern and western portions of the region. With deep trough cannot rule out an isolated cold air funnel this evening. Upper trough will begin to move out of the area however expect it to linger across northeastern portions of the forecast area.
Chattanooga Airport, TN 52 76 52 78 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 50 72 50 76 / 0 0 0 0 Oak Ridge, TN 50 73 50 76 / 0 0 0 0 Tri Cities Airport, TN 47 70 47 73 / 0 0 0 0.
High pressure aloft will weaken by Thursday as a low strengthens to our west. Enhanced moisture will gradually expand northward later in the week into the weekend, allowing for increasing chances of thunderstorms and cooler temperatures this weekend. A high amplitude mid level ridge remains centered across the region this evening, with a pair of high centers located across the northern Rockies and Desert Southwest respectively. This is also resulting in a weak deformation axis across southern Utah with the larger ridge axis, which has helped to maintain scattered showers and thunderstorms this evening.
921 PM EDT Wed Sep 6 2017 A cold front will push offshore tonight.
735 PM EDT Wed Sep 6 2017 High pressure with drier and cooler weather for the remainder of the week. These are a being driven by combination of the upper level trough and daytime heating, so think now that the sun is beginning to set the showers should gradually die off. There are a few minuscule complications in the short term forecast with the upper level trough axis taking its time traversing the northeastern CONUS, allowing sheared out vorticity maxima to track through the northern CWA boundary. Also adding to the lift is a weak reinforcing cold front.
1016 PM EDT Wed Sep 6 2017 High pressure with drier and cooler weather for the remainder of the week. There are a few minuscule complications in the short term forecast with the upper level trough axis taking its time traversing the northeastern CONUS, allowing sheared out vorticity maxima to track through the northern CWA boundary. Also adding to the lift is a weak reinforcing cold front.
On Thursday, winds stay on the light side as a warmer air mass moves into the region. The models show a sharp 50h ridge over the western U. with a large low pressure trough over the eastern U.
1156 PM CDT Wed Sep 6 2017 For the ArkLaTex, SKC and a beautiful fall like night with winds decoupled under the influence of cool high pressure in a sea of tropical cyclones. /issued 922 PM CDT Wed Sep 6 2017/ Straightforward forecast for this evening with surface and upper- level ridge prevailing areawide. Aside from thin cirrus possibly affecting SE OK by daybreak, mostly clear skies to prevail areawide overnight with low temperatures forecast to fall into the upper 40s across SE OK and the lower to mid 50s elsewhere.
Weak low pressure will linger from Indiana to eastern Canada into Thursday night. High pressure should then move in from the west and control of Hoosier weather through the weekend.
Possible shift to swly CSV after 08/02Z per above sfc ridging influences slowly shifting slightly eastward.
1137 PM CDT Wed Sep 6 2017 High pressure both aloft and at the surface means that VFR conditions and overall good aviation weather are expected. Outlying areas are already falling to around 60 while the urban locations remain in the lower 70s. The current forecast looks good with lows ranging from the lower 50s in rural areas and lower 60s in the more urban locales. This ridge will move east tonight. The exception will be in the warmer spots of the Metroplex where some lower 60s are expected.
1152 PM CDT Wed Sep 6 2017 Early afternoon temperatures were in the upper 60s to mid 70s with dewpoints in the low to mid 40s. Canadian high pressure was centered across the plains early this afternoon with a deep upper level trough from the great lakes into the deep south region. Temperatures in the mid to upper 40s are once again expected with the cooler readings in the eastern Ozarks. The upper trough will drift eastward as we head through the end of the week into the weekend, with rising upper heights and a gradual return of some moisture.
605 PM CDT Wed Sep 6 2017 Early afternoon temperatures were in the upper 60s to mid 70s with dewpoints in the low to mid 40s. Canadian high pressure was centered across the plains early this afternoon with a deep upper level trough from the great lakes into the deep south region. Temperatures in the mid to upper 40s are once again expected with the cooler readings in the eastern Ozarks. The upper trough will drift eastward as we head through the end of the week into the weekend, with rising upper heights and a gradual return of some moisture.
1207 AM EDT Thu Sep 7 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. Little overall change was needed for todays forecast as cold temperature and more convection chances will plague the region as the longwave trough axis slides eastward.
High pressure is expected to continue to move southeast over Arkansas overnight causing light northerly winds to become light and variable. Mostly sunny skies are expected throughout the day tomorrow under the influence of high pressure. The upper low pressure trough was over the eastern US, with a strong upper northwest flow into AR. This has allowed the Canadian high pressure to filter this far south. The upper low pressure trough will move to the eastern US and is expected to steer Hur.
General upper flow will remain northwesterly with ridge over the western CONUS and trough over the Great Lakes. /Issued 247 PM CDT Wed Sep 6 2017/ One more night of atypically cool temperatures across the region as high pressure remains over the central and southern plains. Large scale upper ridging will remain centered to the west.
623 PM CDT Wed Sep 6 2017 An upper level ridge will continue to nose its way in from the west as an upper trough lifts northeast across the Great Lakes. This ridge will move east tonight. The exception will be in the warmer spots of the Metroplex where some lower 60s are expected.
Mid- to upper-level clouds will begin to move later in the period from convection off the High Plains.
1003 PM EDT Wed Sep 6 2017 A cold front will move offshore this evening. High pressure will build into the region from the NW tonight and Thursday.
SKC and a beautiful fall like evening with winds about to decouple from the N as only high pressure could in a sea of tropical cyclones.
Deep mid-level trough along the IL/IN border this afternoon will continue to move slowly east across the Great Lakes through Thursday. With the trough over the upper Ohio Valley by Thursday afternoon, temps should be a bit warmer Thursday and cumulus will likely be a little less plentiful.
719 PM EDT Wed Sep 6 2017 A deepening upper level trough will swing slowly SE across the Great Lakes and northeast for the next several days. The deep trough is still over our area and the axis of the deeper part of the trough wants to move over us Thursday.
929 PM EDT Wed Sep 6 2017 A cold front will remain stalled near the New England coast through early Thursday morning with occasional heavy rain and a few thunderstorms occurring, especially this evening and overnight.
A drier and cooler airmass is settling over the area in the wake of a weak cold front that has now drifted south out over the Gulf of Mexico. PWAT's will drop below 1 inch over the entire area by 12Z Thursday, with dewpoints ranging from the low to mid 50s over far interior northwestern zones to lower 60s along the coast by daybreak Thursday morning. Even with the sun on Thursday, moderate and somewhat deep northeasterly flow will maintain cooler temperatures, with highs expected to be in the lower 80s for most locations. Lows tonight ranging from the low to mid 50s over the interior and low to mid 60s along the I-10 corridor and down to the coast.
A frontal trough will drop through the nrn peninsula into the late night hours and weaken into Thu.
1046 PM CDT Wed Sep 6 2017 Another quiet and cool night ahead as high pressure shifts south.
The low pressure area(remnants of Lidia) are beginning to move inland this evening. The low will move north of the forecast area by early afternoon along with most of the activity. Pattern remains relatively unchanged from yesterday with closed low off the coast. Lightning continues offshore around the base of the low with plenty of moisture and elevated instability streaming into the area. Some of these storms may slide down into the lower elevations portions of the northern & central Sac Valley later tonight into Thursday, though expecting less coverage of lightning in these areas.
705 PM EDT Wed Sep 6 2017 A deepening upper level trough will swing slowly SE across the Great Lakes and northeast for the next several days. The deep 500 hpa trough and cold air will make for a good amount of clouds and areas of misty/fog. The deep trough is still over our area and the axis of the deeper part of the trough wants to move over us Thursday.
Outlying areas are already falling to around 60 while the urban locations remain in the lower 70s. The current forecast looks good with lows ranging from the lower 50s in rural areas and lower 60s in the more urban locales. /Issued 623 PM CDT Wed Sep 6 2017/ An upper level ridge will continue to nose its way in from the west as an upper trough lifts northeast across the Great Lakes. This ridge will move east tonight. The exception will be in the warmer spots of the Metroplex where some lower 60s are expected.
Thursday looks a little warmer than today, especially along and west of the Red River Valley. Winds look to stay on the lower end as well.
An upper level low moving towards the San Francisco Bay Area brought cooler temperatures to the area today. Highs were generally 3 to 6 degrees cooler than yesterday and only a few degrees above normal values. This low will bring increasing low clouds to the area overnight as the marine layer deepens. The upper low moves into the SFO Bay Area late tonight then lifts NE into northern California on Thursday. Another upper trough from the west is forecast to form into a cutoff low just off the SFO Bay Area coast.
934 PM MDT Wed Sep 6 2017 Latest upper analysis shows a high amplitude ridge over the western half of the CONUS and a trough over the east. At the surface, high pressure is shifting eastward over the great plains states and broad area of weak low pressure is developing over the western states. Tonight and on Thursday, the upper ridge will remain in place over the western CONUS with the upper trough shifting slowly eastward.
Continuing influence from a strong upper level ridge over the western U. Synoptic Setup: A large ridge resides over the western half of the CONUS and Canada with a large trough over the eastern halves. This has placed south central Montana under the warmer side of northern to northwestern flow.
840 PM EDT Wed Sep 6 2017 A cold front will move offshore this evening. High pressure will build into the region from the NW tonight and Thursday.
An upper-level trough will continue to very slowly shift off to the east tonight through the day Thursday. Lows tonight will range from the lower to middle 40s across the area. By Thursday afternoon, the mid-level trough should make its way off to the east, so chances of showers will diminish accordingly, eventually coming to an end by Thursday evening.
Lows will be in the lower 50s across most of the CWA, but some low-lying areas, especially those in west TN and north MS, may dip into the 40s by sunrise.
836 PM EDT Wed Sep 6 2017 A deep upper-level trough will dominate our weather as it slowly lifts to the north.
Upper level ridge over the western portions of the US will continue to build eastward over the state. High will max out around the low 80s with mid to upper 80s expected for Thursday. Models continue to show the strong upper level ridge remaining over the western United States through the weekend.
1147 PM CDT Wed Sep 6 2017 At 2 PM, a short wave trough was located over northeast Wisconsin. For tonight, the short wave trough over northeast Wisconsin will move southeast into Lower Michigan. On Thursday and Thursday evening, a short wave trough and cold front will move south through the Upper Mississippi River Valley. Since there is still some convergence along the departing cold front, introduced a small rain chance for this time period.
710 PM EDT Wed Sep 6 2017 A cold front will move offshore this evening. High pressure will build into the region from the NW tonight and Thursday.
624 PM CDT Wed Sep 6 2017 Another quiet and cool night ahead as high pressure shifts south.
/ISSUED 345 PM CDT Wed Sep 6 2017/ A cold front moved through the area this morning and has pushed well offshore. This dry airmass will let temperatures fall into the lower 60s in the southern CWA and upper 50s in the northern counties tonight for a refreshing preview of fall. ridge and eastern U. trough. At the surface, a stationary ridge axis just to our north will provide a light northeast wind through the forecast period. 42 Katia has now strengthened into a hurricane, however a cold front that moved offshore earlier today will keep the storm in the southern Gulf of Mexico giving the upper Texas coast little, if any, direct impact.
630 PM CDT Wed Sep 6 2017 255 PM CDT Large upper level trough still situated across the region this afternoon and in this pattern, cloud shield has really expanded.
922 PM CDT Wed Sep 6 2017 Straightforward forecast for this evening with surface and upper- level ridge prevailing areawide. Aside from thin cirrus possibly affecting SE OK by daybreak, mostly clear skies to prevail areawide overnight with low temperatures forecast to fall into the upper 40s across SE OK and the lower to mid 50s elsewhere. SKC and a beautiful fall like evening with winds about to decouple from the N as only high pressure could amidst the number of active tropical cyclones in the Atlantic basin.
Our current high amplitude flow and long wave trough across the eastern CONUS will give way to rising heights and weaker flow toward the weekend.
623 PM MDT Wed Sep 6 2017 The negatively tilted upper ridge currently situated over the intermountain west will slowly shift east the next couple of days. As the ridge builds, may also see a return of wildfire smoke from west to east although latest HRRR model guidance projects the smoke to be of relatively low concentration near the surface.
935 PM EDT Wed Sep 6 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. With colder air aloft, and the low topped convection, its possible that small hail could be created in the updrafts. with a deep longwave trough being the dominant feature. Thursday will see better chances for precipitation as the trough axis crosses the forecast area.
The CWA will again see a nice sunny day with highs reaching warmer into the mid and upper 80s. upper level ridging will meander over central and western portions of the country will allow for warming trend to persist. along with overnight lows into the mid 50s to the lower 60s.
The cold front currently extends across Georgia into the Florida Panhandle, with high pressure centered over the Plains building into the area. At upper- levels, Central Alabama is near the base of a deep longwave trough over the eastern CONUS, between high amplitude ridges over the western CONUS and Atlantic. Winds will begin to weaken after sunset as well, eventually going calm across the north overnight as a ridge axis builds eastward across northern MS/AL and TN, while further south a few kts of wind will remain. Combination of cold air advection and radiational cooling with a very dry air mass will allow lows to reach the low to mid 50s, with some 40s expected in the typically cooler locations.
742 PM EDT Wed Sep 6 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. with a deep longwave trough being the dominant feature. Thursday will see better chances for precipitation as the trough axis crosses the forecast area.
623 PM CDT Wed Sep 6 2017 No aviation restrictions in this TAF period as the cold front has dried out the atmosphere and mostly clear skies are expected through the period. A cool front shifted through the region overnight and this morning with its current position now in deep south Texas while a deeper longwave trough shifts across the MS Valley. This front has ushered in dewpoints in the low 40s this afternoon. Some locations could over-achieve on their lows in drainage locations into the low 50s early tomorrow morning.
1042 PM MDT Wed Sep 6 2017 High pressure centered over the eastern Great Basin has begun its slow retreat this Wednesday afternoon.
744 PM EDT Wed Sep 6 2017 Cool weather with periodic shower chances can be expected until high pressure builds this weekend. Evening update will include an expansion of chance PoPs, as showers continue to develop ahead of trough axis. with a deep longwave trough being the dominant feature. Thursday will see better chances for precipitation as the trough axis crosses the forecast area.
Clear to partly cloudy skies and ll dry air should allow for another chilly night, particularly in the low lying areas. On Thursday, winds stay on the light side as a warmer air mass moves into the region. The models show a sharp 50h ridge over the western U. with a large low pressure trough over the eastern U.
Through the remainder of the short term period, upper level troughing will remain in place over the lower Ohio Valley. Lows tomorrow night will be just a couple of degrees warmer than tonight.