Aikyam-Lab/Synoptic-Bench huggingface dataset:
Steepening lapse rates ahead of an approaching upper trough will result in a weakly unstable environment by this afternoon. Prefrontal trough/dry line will move from northeast Colorado to northwest Kansas and serve as a weak forcing mechanism between 18-21z. Precipitation chances will diminish overnight with partly cloudy skies and lows ranging from the lower 40s in northeast Colorado to the upper 50s in Norton and Graham counties in northwest Kansas. Cold front will be making its way through western areas Friday morning and eastern areas Friday afternoon. However, light precipitation will gradually expand west to east through Friday afternoon in the cooler air behind the front with the approach of the upper trough axis. High temperatures will range from the lower 50s in northeast Colorado to the upper 70s in Norton and Graham counties with the later frontal passage.
413 AM PDT Thu Apr 13 2023 A low pressure system moving inland through the western states and a coastal eddy have brought rapid deepening of the marine layer to around 6000 feet with light rain and areas of drizzle from the coast inland to the coastal slopes of the mountains. High temperatures will be much cooler for inland areas today, then a warming trend for Friday through the weekend.
803 AM EDT Thu Apr 13 2023 Cutoff upper level low over the Lower Mississippi Valley will lift northeast and move across the eastern U. For Friday high pressure will ridge west from well out in the Atlantic Ocean across the Florida peninsula with the south to southwest flow persisting.
- Widespread rain and snow chances from Friday through the weekend with much cooler temperatures.
603 AM CDT Thu Apr 13 2023 (Today and tonight) Little is happening across the region this morning as minor ridging has developed across the region. Otherwise, it looks like the slightly warmer temperatures are the only other thing worth a mention. We will be in the low to middle 80s this afternoon, which will bring our temperatures back to right around normal for this time of year.
559 AM CDT Thu Apr 13 2023 The Rex Block is beginning to weaken and the closed low will slide to the northeast towards the Ohio Valley over the next 24 to 36 hours. Lows will be quite mild, in the low to mid 50s, around 10 to 15 degrees above normal. On Friday temperatures will be a tad cooler due to increasing mid and high clouds from the system sliding into the Ohio Valley, thus highs will be in the mid 70s to around 80 degrees. Byrd A pattern change is still in store for the weekend as a western CONUS trough deepens and slides east.
555 AM CDT Thu Apr 13 2023 (Today) Clouds have begun to increase across the area early this morning as a slow moving low pressure system begins to lift northeast and will soon center over the Mobile area.
(Today and tonight) Little is happening across the region this morning as minor ridging has developed across the region. Otherwise, it looks like the slightly warmer temperatures are the only other thing worth a mention. We will be in the low to middle 80s this afternoon, which will bring our temperatures back to right around normal for this time of year.
630 AM CDT Thu Apr 13 2023 A warm front and southerly sfc flow ahead of an area of low pressure will draw continued hotter than normal air into the southern cwa today. The northern side of the system will be much cooler, especially over snow covered areas, with highs still about 10 degrees below mid April averages. Under the clouds and rain on Friday, with upper troughing moving in, temperatures will be much cooler with highs only in the 40s across the forecast area. Departing upper trough will leave us early enough, however for the first 24-hour of the long range we will still have some stratus (up to 10kft) all warmer than the dendritic growth zone (so likely rain and less probable for snow) along with just enough lift for light QPF.
While we should see an improvement during low tide tonight, expect water levels to be elevated once again during the day tomorrow with minor coastal flooding probably beginning by late morning and continuing through the high tide period in the early afternoon. High temperatures will range from the lower 80s in the Coastal Bend/Victoria Crossroads to the lower 90s along the Rio Grande. With moisture increasing even further, some locations will only fall into the lower 70s Friday night.
Any lingering cloud cover across the region to gradually diminish as the low shifts northeast and upper-level ridging builds across the ArkLaTex. Overnight low temperatures are forecast to fall into the low to mid 50s. High temperatures on Friday to climb into the low to mid 80s. Instability to increase on Friday night as the upper-level ridge shifts east and southwest flow increases aloft ahead of an approaching trough.
/29 (Now through Friday) An upper low centered over southwestern Mississippi weakens while moving slowly off to near eastern Tennessee through the period.
(Tonight through Friday night) The strong low pressure system across the northern Gulf works further into the Southeast into tonight as a weak 500mb ridge builds across Texas. Southeasterly winds persist into tonight and Friday, as low pressure develops across the Plains.
1227 PM CDT Thu Apr 13 2023 (Today and tonight) Little is happening across the region this morning as minor ridging has developed across the region. Otherwise, it looks like the slightly warmer temperatures are the only other thing worth a mention. We will be in the low to middle 80s this afternoon, which will bring our temperatures back to right around normal for this time of year.
256 PM MDT Thu Apr 13 2023 Broad upper level trough over the western states will slowly shift eastward over the next 24 hours. This wave will dive southeast over the next 24 hours and help deepen the broad trough over the western states. A cold front pushes south across the area tonight. Meanwhile the ECMWF and Canadian models are warmer and would keep precipitation rain through most of Friday. Leaned towards the warmer solution, but still have a mention of rain/snow for Friday across the Urban Corridor. Any accumulation across the lower elevations Friday should be limited to elevated and grassy surfaces. Guidance continues to trend a bit wetter/cooler overnight, and a slushy inch or two is possible across the Denver metro depending on how quickly temperatures cool.
1207 PM CDT Thu Apr 13 2023 (Rest of Today) An area of low pressure along the Alabama Gulf Coast will move northward today into west central Alabama by this afternoon. As southeasterly flow increases ahead of the parent low, moisture will increase across the region -- coinciding with the forcing from the low we expect additional bands of scattered convection to fire late in the day and especially into the evening hours.
Issued by National Weather Service Lincoln IL 1239 PM CDT Thu Apr 13 2023 The Rex Block is beginning to weaken and the closed low will slide to the northeast towards the Ohio Valley over the next 24 to 36 hours. Lows will be quite mild, in the low to mid 50s, around 10 to 15 degrees above normal. On Friday temperatures will be a tad cooler due to increasing mid and high clouds from the system sliding into the Ohio Valley, thus highs will be in the mid 70s to around 80 degrees. Byrd A pattern change is still in store for the weekend as a western CONUS trough deepens and slides east.
Temperatures this afternoon featured variety from the lower to upper 80s dependent on areas soaked with recent rainful on natural grounds to dry concrete. Over the next 12-24 hours, the influence of the surface reflection from the mid/upper low over the Gulf of Coast states is expected to lift suffiently northward to allow weak ridging in the north Atlantic to impart a more southeast wind flow from this evenig's chaotic, mesoscale-circulation driven sea/bay breezes. With steering flow becoming light out of the southeast while a vorticity lobe from the upper low lifts the 700-500 mb moisture northeast. Drying may be short-lived in its wake, as high pressure moves to the U.
- A cold front passage Friday afternoon will lead to well below normal temperatures for the weekend It has been another hot, windy, red flag day. That cold front does bring cooler temperatures, such that areas behind the front Friday should only reach the lower to mid 60s, but areas ahead of the front should still be in the lower 80s.
Surface warm front is currently draped across the Florida Panhandle and down through Volusia County, and will continue to lift northward through the remainder of this afternoon. A warm front will continue to lift northward this morning and into the afternoon, with scattered to numerous showers and isolated to scattered storms across the local Atlantic waters. (12Z TAFS) MVFR ceilings across ECFL this morning will improve to VFR as a warm front moves northward and sky coverage decreases slightly behind it, close to 15Z.
All good things must come to an end, as this blocking pattern is currently starting to break down.
Cooler temperatures and gusty southwest winds will continue through Friday, strongest winds will be today, especially east of Flagstaff. There is a chance for showers and thunderstorms over portions of northern Arizona today and Friday, then dry heading into the weekend, with warmer temperatures and lighter winds. A cooler day is in store as clouds stream over northern Arizona. Beautifully, lenticular clouds have been a persistent sight near the highest elevations, including the San Francisco Peaks. A slow moving trough moving through the Great Basin will continue to lower heights over Arizona, with a s/wv trough axis passage both today and Friday.
1248 PM CDT Thu Apr 13 2023 Radar this morning indicates showers continue to rotate into our southern counties around an upper level low located near Mobile, Alabama. This will keep temperatures cooler in the south today with highs only in the 60s, with much warmer temps in the north in the 70s to near 80. Low pressure system currently in the Gulf will drift northeastward throughout the day, allowing some moisture to return to the area today.
Warm and humid conditions are in place as much of the Florida peninsula is in the warm sector of an occluded low pressure system that is centered across central MS/AL. The low level flow has transitioned to more southwesterly since earlier and this will allow the west coast sea breeze to continue to push well inland later today. The low pressure system will weaken tonight as it pulls northward across the TN valley with a dry slot then getting introduced across the area on Friday.
(This evening through Friday) A longwave mid-level trough, centered from the Desert Southwest to the Pacific Northwest, will continue to move upstream of the Southern Plains overnight and into tomorrow. The surface response will be lee troughing along the Rockies, and an increase in southerly winds over the entire forecast area throughout the day. Warm air advection in the low levels will strong throughout the day.
1206 PM CDT Thu Apr 13 2023 (Today through Friday afternoon) A large upper low spins along the Gulf Coast this morning while back to the west a trough extends from ID to Srn CA. As the trough moves east today and tonight the Gulf low will roll east too. Friday this trough axis will extend down across CO and NM.
415 PM EDT Thu Apr 13 2023 Ridging present at all levels was just to our northeast at mid afternoon, and departing in that direction. As this was occurring, a largely stacked low pressure system was centered over Mississippi. The northeastward shift of the regime will continue, with what's left of the low passing over the central Appalachians Friday night. Ridge/valley differences should become less pronounced. Weak high pressure will slowly nudge in from the west with WAA taking over through the day ahead of an approaching cold front.
346 PM EDT Thu Apr 13 2023 (This evening through Friday) Busy short term on tap with a Tornado Watch ongoing across south central Georgia as banding from the low pressure system over MS/AL swaps over the area. Main severe weather potential should remain mostly confined to central Georgia as a cells deepen along a warm front boundary over the area, with SPC highlighting a corridor of Enhanced Risk (level 3 out of 5) along and between I-75 and I-16. Overall, expect rain to continue on and off through tomorrow as the low pressure system meanders NE into N AL, eventually making its way into NW GA by Friday evening.
152 PM PDT Thu Apr 13 2023 Cool, windy, and gloomy weather will persist today as a low pressure system pushes through the West. High pressure will build in behind the exiting low pressure system, with a warming trend in store Friday through the weekend.
227 PM CDT Thu Apr 13 2023 A ridge of high pressure will prevail through the remainder of today allowing for dry conditions across the FA. The dewpoint depression is now 30-40 degrees across many locations! For Friday, a H5 closed low will move across the southeast CONUS and will weaken into an open wave.
Showers have remained in the solid snow state through much of the day, as temperatures have struggled to climb much above freezing in those western valleys and the Cody Foothills.
353 PM EDT Thu Apr 13 2023 High pressure continues to control the weather pattern across the forecast area through Friday.
(Tonight) Warmer temperatures are expected across eastern Oklahoma and western Arkansas tonight as a southerly breeze persists through the night.
A warm front and southerly sfc flow ahead of an area of low pressure will draw continued hotter than normal air into the southern cwa today. The northern side of the system will be much cooler, especially over snow covered areas, with highs still about 10 degrees below mid April averages. Under the clouds and rain on Friday, with upper troughing moving in, temperatures will be much cooler with highs only in the 40s across the forecast area. Departing upper trough will leave us early enough, however for the first 24-hour of the long range we will still have some stratus (up to 10kft) all warmer than the dendritic growth zone (so likely rain and less probable for snow) along with just enough lift for light QPF.
The low pressure system that brought significant snow to southwest Montana is moving off to the northeast this afternoon. A ridge of high pressure will build over the Northern Rockies for a short respite from the cool and showery conditions that have been experienced for the past several days.
1237 PM CDT Thu Apr 13 2023 (Today and tonight) Some clouds from the closed low off to our southeast could continue to spread westward into the CWA today.
Increasing capes, higher LLM and an approaching upper trof indicate a better chance for heavier rain Friday night from southeast SD northeast across western MN.
138 PM EDT Thu Apr 13 2023 High pressure and a dry airmass will lead to mostly sunny skies and continued warm conditions today.
to the lower 80s across western MO. Cloud cover will also keep temps a little warmer tonight across IL with cooler temps in MO. Auten A change is expected for the weekend and beyond as trough and low pressure system develops and moves across the region. Late Friday night, the system will being developing out in the plains as the trough digs in the eastern Rockies.
Winds will start to pick up from the southwest tomorrow as an upper trough moves across the northwestern CONUS, strengthening the lee cyclone over southeastern Colorado.
1028 AM CDT Thu Apr 13 2023 Radar this morning indicates showers continue to rotate into our southern counties around an upper level low located near Mobile, Alabama. This will keep temperatures cooler in the south today with highs only in the 60s, with much warmer temps in the north in the 70s to near 80. Low pressure system currently in the Gulf will drift northeastward throughout the day, allowing some moisture to return to the area today.
941 AM PDT Thu Apr 13 2023 Cool, windy, and gloomy weather will persist today as a low pressure system pushes through the West. High pressure will build in behind the exiting low pressure system, with a warming trend in store Friday through the weekend.
233 PM EDT Thu Apr 13 2023 High pressure across most of the eastern United States will maintain dry and warmer weather through Friday.
(This afternoon through Friday Night) Radar this afternoon shows scattered showers continue to spread northward across Middle Tennessee around an impressive upper level low that can be seen quite well on water vapor imagery. The low is current centered east of Jackson, Mississippi, and is forecast to move northward to the TN border today, then northeastward across the midstate tomorrow. As it does so, additional scattered showers and possibly a thunderstorm or two are anticipated to rotate across the cwa through tonight and much of tomorrow before the low moves east of our region. Rain and clouds will gradually clear out Friday night, but lows will stay mild in the low ot mid 50s.
We currently have a trough sitting to the northeast of us. However, both the GEFS and European model ensembles are in agreement that this trough will move east towards the Great Basin and the Rockies.
The snow was a result of an upper low that moved directly overhead and moisture wrapping around the low, enhanced by upsloping northwesterly flow. Surface winds: W-NW 10-20 kt with gusts to 30 kt (mainly east of KBOI), decreasing everywhere except the Lower Snake River Plain by 14/03Z.
Conditions also remain very dry with this airmass, with surface dewpoints generally holding in the low to mid 40s. Friday will be another unseasonably warm day across the area with many inland areas again likely to top out into the low 80s.
Those near the lake though will remain on the cooler side with highs briefly getting into the 60s to mid 70s before the lake breeze moves through during the afternoon.
(This evening through Friday) Elevated Fire Weather conditions expected Friday afternoon, under warmer and drier conditions. While still under some weak upper-level ridging across West Central Texas, overnight low temperatures are expected to only fall into the mid 50s to lower 60s, before rebounding into the mid 80s to lower 90s by Friday afternoon.
(This Evening and Tonight) A little bit of a tricky forecast late this afternoon into this evening as an area of low pressure pivots northward across western Alabama and eventually into portions of the Tennessee Valley. The center of the low roughly near Demopolis, AL with a pronounced dry slot evident on satellite across much of southern Alabama. Additional bands of showers with some embedded thunder will be possible overnight as the low slowly meanders northward across the area. Some localized gusty gradient winds will also be possible simply due to the tightening pressure gradient from the low.
1110 AM EDT Thu Apr 13 2023 High pressure across most of the eastern United States will maintain dry and warmer weather through Friday.
The closed low pressure system that has been impacting the Gulf Coast begins to decay and be absorbed into the larger flow.
308 PM EDT Thu Apr 13 2023 It's been a warm day across the region, with temperature obs reporting in the upper 70s and low 80s as high pressure continues to dominate the forecast. Clouds have stayed mainly to our south in association with the large upper low across the Deep South, though some harmless cirrus have quietly streamed into the region from the south. However, soundings suggest the low level dry air will be rather persistent, so may only see some virga for tonight across far south-central KY. For tomorrow, isolated to scattered showers will be possible as the upper low tracks from central Tennessee through eastern Kentucky. Best precip chances will be east of I-65, and along with dewpoints possibly reaching the low 60s over the Bluegrass, we may be able to realize some marginal instability during the afternoon.
The anomalously high amplitude mid level ridge will continue to influence the Great Lakes today. The center of the ridge axis will actually lift northward into Se Mi this afternoon. Srn Mi will remain just north of the low level anticyclone today. Although there is some concern that the mid level subsidence may keep mixing heights a touch lower than yesterday, morning temps are going to be several degrees warmer this morning. Positive PV advection into the western CONUS trough will drive a more progressive long wave pattern this weekend.
924 PM EDT Thu Apr 13 2023 A decaying low pressure system moves north into the Ohio Valley bringing increased cloud coverage and the chance for rain and a rumble of thunder on Friday. Another low pressure arrives over the weekend, bringing additional chances for rain and thunderstorms. The closed low pressure system that has been impacting the Gulf ultimately opening up into a wave as it is carried northeast.
647 PM CDT Thu Apr 13 2023 (This evening through Friday) Elevated Fire Weather conditions expected Friday afternoon, under warmer and drier conditions. While still under some weak upper-level ridging across West Central Texas, overnight low temperatures are expected to only fall into the mid 50s to lower 60s, before rebounding into the mid 80s to lower 90s by Friday afternoon.
218 PM MST Thu Apr 13 2023 A weather system will pass through the area today bringing gusty winds, passing clouds, and cooler temperatures through the end of the week.
922 PM EDT Thu Apr 13 2023 High pressure continues to control the weather pattern across the forecast area through Friday.
624 PM CDT Thu Apr 13 2023 (Tonight through Friday night) The strong low pressure system across the northern Gulf works further into the Southeast into tonight as a weak 500mb ridge builds across Texas. Southeasterly winds persist into tonight and Friday, as low pressure develops across the Plains.
658 PM EDT Thu Apr 13 2023 VFR conditions will prevail again this forecast as a ridge of high pressure shifts from the Ohio Valley into the eastern Great Lakes. With the repositioning of this ridge, the prevailing southwesterly winds of the past several days will back to the southeast and become much weaker (generally 10 knots or less).
635 PM CDT Thu Apr 13 2023 (This Evening and Tonight) A little bit of a tricky forecast late this afternoon into this evening as an area of low pressure pivots northward across western Alabama and eventually into portions of the Tennessee Valley. The center of the low roughly near Demopolis, AL with a pronounced dry slot evident on satellite across much of southern Alabama. Additional bands of showers with some embedded thunder will be possible overnight as the low slowly meanders northward across the area. Some localized gusty gradient winds will also be possible simply due to the tightening pressure gradient from the low.
605 PM CDT Thu Apr 13 2023 (Tonight) Warmer temperatures are expected across eastern Oklahoma and western Arkansas tonight as a southerly breeze persists through the night.
628 PM CDT Thu Apr 13 2023 (This evening through Friday) A longwave mid-level trough, centered from the Desert Southwest to the Pacific Northwest, will continue to move upstream of the Southern Plains overnight and into tomorrow. The surface response will be lee troughing along the Rockies, and an increase in southerly winds over the entire forecast area throughout the day. Warm air advection in the low levels will strong throughout the day.
628 PM CDT Thu Apr 13 2023 (This afternoon through Friday Night) Radar this afternoon shows scattered showers continue to spread northward across Middle Tennessee around an impressive upper level low that can be seen quite well on water vapor imagery. The low is current centered east of Jackson, Mississippi, and is forecast to move northward to the TN border today, then northeastward across the midstate tomorrow. As it does so, additional scattered showers and possibly a thunderstorm or two are anticipated to rotate across the cwa through tonight and much of tomorrow before the low moves east of our region. Rain and clouds will gradually clear out Friday night, but lows will stay mild in the low ot mid 50s.
Cooler temperatures will hold for today with a low chance of residual mountain showers Friday morning.
From synopsis, light southeast to south breezes are expected tonight as weak high pressure builds over the western Atlantic.