Aikyam-Lab/Synoptic-Bench huggingface dataset:
1148 PM CDT Wed Jun 26 2024 (This afternoon through Thursday night) WV imagery shows the upper ridge centered over New Mexico/northern Chihuahua this afternoon, resulting in a warm afternoon of triple- digit highs most locations. Convection that developed overnight has mostly diminished, but the HRRR redevelops convection early this afternoon over the higher terrain west of the Pecos, where it's needed most. Overnight, an upper trough is forecast to make landfall in the PacNW, and will begin flattening the ridge Thursday. This portends good news for those who don't like the heat, as thicknesses will come down a notch, and highs will be a degree or so cooler than today's. East-southeasterly upslope flow will once again develop convection over the higher terrain, and this will continue into the evening hours.
(Today through Friday) Upper ridging centered near El Paso this morning, with a trough extending from eastern Kentucky to near Lake Charles. A stronger trough was over the Pacific Northwest. The greatest areal coverage was over the lower portions of the Louisiana coastal parishes. The troughing that is moving into the area this morning is expected to become strung out near or just off the coast over the next 36 hours.
1231 AM CDT Thu Jun 27 2024 (This evening through Friday) A cold front was pushing thru the state this afternoon, and ahead of this a line of thunderstorms was making its way thru south Arkansas. Looking at the big picture, an upper level ridge was centered over the swrn US and will shift eastward over the central US by Friday. The cold front will bring a slight and temporary relief to the heat tomorrow, but it will begin to build back in earnest on Friday.
Cool, dry northwest flow will develop as high pressure builds in from the northwest with increasing subsidence diminishing lingering stratocu through the morning, which should eventually turn into scattered afternoon cumulus. Positioning of the high will support weak warm, moist advection amid mostly clear skies to raise area temperature about 5 degrees above the daily average. Broad ascent may increase mid to high level clouds and even low probability showers Friday night as weak perturbations ahead of the main upper level trough axis.
139 AM MDT Thu Jun 27 2024 -Strong upper trough will support showers and thunderstorm chances today and this evening, with some storms possibly severe.
155 AM EDT Thu Jun 27 2024 Shower and thunderstorm activity will come to an end tonight with the passage of a cold front.
and Friday Cool weather will continue across northeast Wisconsin today as high pressure drifts off to the east. Later in the day clouds will increase from the west as a low pressure system develops across the northern Plains. Clouds will continue to thicken and lower tonight as the aforementioned low pressure system tracks east towards the upper Mississippi Valley tonight. Lows tonight will be a bit warmer given the abundant cloud cover; with temperatures mainly in the 50s.
- Storm chances return for Fri afternoon into Fri night as a cold front moves through with some severe storms possible. At the surface, high pressure is centered over the Upper Mississippi Valley with a stationary front down near the Arklatex region. Still looking like central KS to have the higher storm chances this evening/overnight but still may see at least see some iso/sct activity to the south. By late afternoon Fri, cold front should stretch from eastern Nebraska into north central KS and will continue tracking south into the evening hours.
Areas across the eastern half of the area will be less hot given a slight southwest shift of the low-level thermal ridge. With the nose of the low-level jet farther north, storms would be more likely to maintain their intensity across Kansas with a gradual weakening trend expected in Oklahoma.
Additionally, a deep layer ridging pattern will begin to take place across the Lower Mississippi Valley. Temperatures are expected to be a few degrees lower than previous days, with highs in the lower 90s and overnight lows in the middle 70s.
Upper ridging will flatten across the Southern Plains today in response to an upper trough moving across the Northern Rockies. High temperatures will still climb into the 100s for most locations outside of the higher terrain. Friday looks like another hot one as the low level thermal ridge amplifies across the region.
(Today) An upper level trough axis was dropping south through the mid South and TN Valley this morning. The trough will continue to shift southeast, while the surface boundary sags into north AL and southern middle TN by this afternoon.
A passing upper level trough will keep widespread showers and isolated thunderstorms in the forecast into Thursday.
1233 AM CDT Thu Jun 27 2024 Water vapor imagery this evening shows an upper-level trough overhead with drier air beginning to move into west TN. Otherwise, please be sure to enjoy this cooler weather tomorrow before we're hot again this weekend. Otherwise, heights will be on the increase with an upper high developing across TX. Westerlies will shift north leaving a large zone of ridging across the mid and deep south.
A bit of a pattern change today with an upper trough over the lower Mississippi Valley digging southward early this morning. Storms weaken tonight with lows in the low to mid 70s.
(Today through Friday) A weakness in the 500mb ridge may afford the Hill Country, portions of the I-35 Corridor, and Coastal Plains a quick round of showers or storms Thursday afternoon/evening.
(Today through Friday) South Florida remains nestled within a quiescent synoptic regime, with a longwave trough extending into the Gulf of Mexico and quasi-zonal flow predominantly encompassing the southern peninsula. This will maintain a westerly flow regime through much of the low to mid troposphere, which will maintain a fairly persistent and predictable convective regime. To round out the week, an elongated ridge of high pressure will gradually expand over South Florida, causing a further weakening in the synoptic flow regime. Overnight low temperatures will span the low to upper 70s.
The low stratus clouds will be mostly confined close to the shoreline, eventually clearing out and making for another sunny pleasant afternoon and evening, similar to yesterday.
624 AM CDT Thu Jun 27 2024 (Today through Friday Night) An upper level ridge is over New Mexico which is providing northwest flow over Arkansas. The upper ridge will move east tonight, will be over Arkansas by Friday morning, and will remain in place through Friday night. High pressure and subsidence will keep dry conditions over the state through Friday night. Warm conditions will continue today but warmer conditions are expected Friday as a warm front moves north through the state.
Cooler and wetter weather continue today with an upper low over the region.
Also of note, a cold frontal passage yesterday afternoon brought wind gusts of 25 to 40 mph to the east side. Weak ridging will begin to build into the coast around sunrise, and put an end to the risk of light showers shortly thereafter with a slow erosion of the stratus. The low clouds are expected to clear at the coast by noon, and will be faster to erode farther inland, generally by 10 or 11 AM PDT.
Water vapor imagery highlights lower heights across the Gulf of Mexico and Florida, while the CIMMS low-level mean layer analysis depicts a broad ridge axis extending west across the Bahamas and Cuba. The KBYX radar detects isolated showers near and west-southwest of the Lower Keys along the weak southeasterly convergence. A weak ridge axis extending from the western Atlantic over the Straits of Florida will cause light to gentle breezes across Keys waters through tonight.
Hot temperatures will still continue, but there will be a little pullback as highs for most areas will be a few degrees cooler than yesterday. That being said, high dewpoints will still lead to potential heat index values that will push the low 100s across the south and east. Given the surface winds out of the south to southeast, and pretty good turning from the surface to 700mb we could see an isolated supercell or two, and the higher dewpoints would support lower LCL's as well as higher CAPE values. Friday the high will expand a bit to the east, and while we will still mostly be in a westerly flow, there will be a slight southwest component, and warmer temperatures will return.
An upper level trof rolls across The Treasure State, today, with the attendant cold front impacting our region. Considering the timing of cold frontal passage, thunderstorms develop early and continue through the day. Cooler temperatures, follow.
559 AM CDT Thu Jun 27 2024 (Today and tonight) First, the heat will continue this afternoon with the upper level ridge almost directly across the area. Outflow boundary from yesterdays convection moved west into central Texas, along with weak northernly flow aloft along the edge of the center of upper level ridge.
549 AM EDT Thu Jun 27 2024 High pressure slowly builds across the region late today and into Friday.
303 AM PDT Thu Jun 27 2024 Drier and slightly cooler inland for Friday and Friday night.
433 AM PDT Thu Jun 27 2024 A passing cold front continues to bring showers and thunderstorms through Thursday.
Interaction between high pressure ridging westward through the Florida Strait and troughing over the southeast U. High pressure ridging west through the Florida Strait and into the central Gulf of Mexico will maintain a west-southwest onshore flow heading into the weekend. Over the weekend, wind directions may become more variable as the high pressure ridge begins to shift slightly northward.
514 AM MDT Thu Jun 27 2024 -Strong upper trough will support showers and thunderstorm chances today and this evening, with some storms possibly severe.
625 AM CDT Thu Jun 27 2024 (Today through Friday) 500 mb high pressure, initially centered over New Mexico, will ease east into northern Texas during the period while remaining the dominant feature over the BRO CWFA. However, a weak, inverted, mid-level trough slipping under the ridge, combined with precipitable water values increasing to over two inches, will result in isolated to scattered convection over portions of Deep South Texas and the Rio Grande Valley during the daylight hours, with additional convection over the adjacent coastal waters at night.
This progression will continue, while another trough drops over the Pacific Northwest bringing gusty west-northwest winds and slightly cooler and less humid air. * The ridge builds in for Friday, giving us a break in the breezy action until another trough drops in for the weekend.
West to southwest flow will persist today, albeit slightly stronger than previous days, as the ridge axis of high pressure over the west Atlantic stays south of the region today. Hot and humid conditions once again today, with afternoon highs in the low to mid 90s and heat indices of 102-107 degrees. Subtropical ridge axis remains south of the area today, which will lead to a continued W/SW flow through this morning around 10 knots.
645 AM CDT Thu Jun 27 2024 (Today through Friday) Upper ridging centered near El Paso this morning, with a trough extending from eastern Kentucky to near Lake Charles. A stronger trough was over the Pacific Northwest. The greatest areal coverage was over the lower portions of the Louisiana coastal parishes. The troughing that is moving into the area this morning is expected to become strung out near or just off the coast over the next 36 hours.
217 AM PDT Thu Jun 27 2024 A passing cold front continues to bring showers and thunderstorms through Thursday.
426 AM CDT Thu Jun 27 2024 (Today) An upper level trough axis was dropping south through the mid South and TN Valley this morning. The trough will continue to shift southeast, while the surface boundary sags into north AL and southern middle TN by this afternoon.
Highs in the low to mid 90's are still expected this afternoon. In wake of the front, we should see some slightly cooler temps and humidity, with highs in the low to mid 90s. Upper level ridging will start to build eastward back into the region late today into Friday. We will also see a return in warmer conditions, with highs climbing back into the mid to upper 90s.
742 AM EDT Thu Jun 27 2024 High pressure slowly builds across the region late today and into Friday.
723 AM EDT Thu Jun 27 2024 (Today through Friday) South Florida remains nestled within a quiescent synoptic regime, with a longwave trough extending into the Gulf of Mexico and quasi-zonal flow predominantly encompassing the southern peninsula. This will maintain a westerly flow regime through much of the low to mid troposphere, which will maintain a fairly persistent and predictable convective regime. To round out the week, an elongated ridge of high pressure will gradually expand over South Florida, causing a further weakening in the synoptic flow regime. Overnight low temperatures will span the low to upper 70s.
An upper level disturbance will produce marine stratus, patchy coastal drizzle, and relatively cooler temperatures today. Prominent NW flow will drive diurnally driven winds today as high pressure builds in from the Pacific, enhancing the thermal trough and coastal pressure gradient. Broad, weak ridging is expected build into the region Friday, driving interior temperatures back into the 90s. Long-range models indicate anomalous warm ridging building into the eastern Pacific, coupled with potential for min RHs in the teens and single digits by mid- week. Otherwise, a dry air mass moving into our area along with increasing northerly are expected by late morning and afternoon as a weak ridging builds in. Winds slightly diminish from north to south throughout the weekend as another upper level trough moves over the area.
732 AM EDT Thu Jun 27 2024 Dry and pleasant weather conditions develop today as a high pressure briefly builds in. A cold front across southeast MA and the adjacent coastal waters moves farther offshore today. High pressure expected to dominate our weather tonight and Friday.
- After the high swim risk ends this afternoon, a moderate swim risk may linger at beaches located at the southern end of Lake Michigan until the early evening hours.
Breezy winds and much cooler temperatures will continue through the day today.
(Rest of today through Friday) Mesoanalysis early this afternoon depicts much of the same, South Florida remains nestled within a relatively quiet synoptic regime, with a longwave trough extending into the Gulf of Mexico and quasi- zonal flow predominantly encompassing the southern peninsula. This will maintain a southwesterly to westerly flow regime through much of the low to mid troposphere, which will maintain a fairly persistent and predictable convective regime with activity once again favoring the east coast metro areas over the next several hours. Overnight low temperatures will span the low to upper 70s.
1134 AM PDT Thu Jun 27 2024 A passing cold front continues to bring showers and thunderstorms through Thursday.
124 PM EDT Thu Jun 27 2024 High pressure will slowly build across through Friday.
259 PM EDT Thu Jun 27 2024 High pressure remains intact through Friday, keeping the forecast dry.
Tonight and Friday Afternoon satellite imagery shows an upper low centered near the northern parts of the Idaho panhandle moving well to our north along the Canadian border. Cooler and drier air continues to filter in to the region and tonight looks pleasant with much cooler overnight lows compared to the past few days. Precipitation is not expected and daytime highs will generally be in the 70s with some mid to upper 60s in the higher terrain. This will be slightly below normal for late June but enjoy the cooler weather because the heat will be back for the weekend.
Florida remains situated between upper ridging extending westward through the Florida Strait and upper troughing over the southeast U. On the surface, high pressure ridges south of Florida and into the central Gulf of Mexico.
905 AM PDT Thu Jun 27 2024 Drier and slightly cooler inland for Friday and Friday night.
Further north and west, upper ridging begins to build in and will limit rain chances.
There may be a few ongoing thunderstorms heading east out of the forecast area Friday morning, but the main potential for severe weather looks to accompany a cold front working through the region Friday afternoon.
257 PM EDT Thu Jun 27 2024 - Cloudier, warmer, and a bit more humid on Friday.
All quiet across the Florida Keys this afternoon after a late morning/early afternoon cloud line formed along the Upper Keys in just in the lee of the Lower Keys near the Gulf side beaches and flats. The low-level ridge axis stretches west across the Keys this afternoon, but will lift northward tonight through Friday night.
256 PM MDT Thu Jun 27 2024 Showers and thunderstorms diminish later this afternoon and evening, but showery, windy, and much cooler conditions are expected tonight into Friday, with most precipitation falling over North-central Montana.
115 PM EDT Thu Jun 27 2024 Clear and cool tonight under high pressure. Another cold front crosses this weekend, with additional storms. Otherwise, high pressure building into the area will provide for a clear, calm, and cool night tonight. With a high pressure system shifting off to the east on Friday, southerly winds will allow temperatures to climb above normal for this time of year.
An upper level low moving along the Canadian border is causing another round of thunderstorms across northwest Montana this afternoon. Due to a cooler air mass in place because of the cold frontal passage yesterday, it won't get unstable enough to support severe thunderstorms, though gusty winds of 40 mph and small hail are likely with these storms. Tomorrow, a ridge builds into the Pacific Northwest setting up northwest flow and more showers.
1233 PM CDT Thu Jun 27 2024 (Today through Friday) 500 mb high pressure, initially centered over New Mexico, will ease east into northern Texas during the period while remaining the dominant feature over the BRO CWFA. However, a weak, inverted, mid-level trough slipping under the ridge, combined with precipitable water values increasing to over two inches, will result in isolated to scattered convection over portions of Deep South Texas and the Rio Grande Valley during the daylight hours, with additional convection over the adjacent coastal waters at night.
An upper-level trough is allowing for some extra forcing for storms to develop today. Despite the "cooler" temperatures, it will still be humid, with dewpoints into the mid-70s.
1113 AM EDT Thu Jun 27 2024 High pressure will slowly build across through Friday.
1230 PM CDT Thu Jun 27 2024 GOES-16 satellite trends indicate an upper-level ridge located over the Southwest United States and Southern Plains. Meanwhile, a longwave upper-level trough axis extends from Hudson Bay back through Central Alabama and Mississippi. KGWX WSR-88D radar trends show isolated to scattered rain showers on the back side of the low over northeast Mississippi.
(This evening through Friday) Our period of ridging has almost come to a close, in large part due to an upper level trough that is working its way through the Pacific Northwest right now, which will turn our flow more zonal. Looking at tomorrow, the ridge will give its last heat blast for the region, as Friday looks to be one of the hottest so far this summer.
1200 PM CDT Thu Jun 27 2024 (Today and tonight) First, the heat will continue this afternoon with the upper level ridge almost directly across the area. Outflow boundary from yesterdays convection moved west into central Texas, along with weak northernly flow aloft along the edge of the center of upper level ridge.
(This evening through Friday) An upper level ridge will continue to dominate the weather across West Central Texas through the next 24 hours, resulting generally dry and hot conditions.
Weak embedded troughing throughout the eastern half of the central plains has resulted in lingering light showers and isolated thunderstorms during the morning and afternoon.
1113 AM CDT Thu Jun 27 2024 GOES-16 satellite trends indicate an upper-level ridge located over the Southwest United States and Southern Plains. Meanwhile, a longwave upper-level trough axis extends from Hudson Bay back through Central Alabama and Mississippi. KGWX WSR-88D radar trends show isolated to scattered rain showers on the back side of the low over northeast Mississippi.
1039 AM MDT Thu Jun 27 2024 -Strong upper trough will support showers and thunderstorm chances today and this evening, with some storms possibly severe.
An upper-level ridge currently dominates over Kansas and will continue through the near term. A short wave trough in the mid- levels will help provide some dynamic support of convection expected this afternoon.
With breezy onshore winds, some of the low clouds will be pushed inland along the coast. Maximum temperatures Friday will be a bit warmer than today but still around normal for this time of year.
Cold front at 19Z was along the eastern edge of line of storms moving through the NW half of the forecast area. Friday will be a cooler day behind the front with high temperatures remaining in the 60s and 70s. Breezy conditions will develop across the area with 25 to 45 mph northwesterly wind gusts common, strongest over the higher hills and along the western foothills.
1232 PM CDT Thu Jun 27 2024 (Today through Friday) A weakness in the 500mb ridge may afford the Hill Country, portions of the I-35 Corridor, and Coastal Plains a quick round of showers or storms Thursday afternoon/evening.
158 PM EDT Thu Jun 27 2024 High pressure will build south and east into the Great Lakes and Ohio Valley today, bringing drier weather. The high will then move east of the area tonight and Friday.
A departing trough across the Great Basin will produce breezy W-NW winds across the region with gusts up to 30 mph through early this evening. For Friday, a flat ridge of high pressure will bring lighter SW-W winds with temperatures warming up to the lower 90s for western NV and lower 80s for Sierra communities. For the weekend, another trough brushing across the northwest US will bring increased breezes both days, with gusts again near 30 mph.
227 PM EDT Thu Jun 27 2024 *Seasonable end to the week with comfortable humidity *Return of heat+humidity fuels T-storms this weekend *Cooler & dry start to July; heat & T-storms by the 4th Cu will crumble this evening setting up a refreshingly cool and mainly clear night across central PA. Beneath dome of 1020mb high pressure, synoptic conditions support fog formation late tonight into early Friday morning in the river/stream valleys across the western and northern Alleghenies.
1154 AM EDT Thu Jun 27 2024 High pressure will build south and east into the Great Lakes and Ohio Valley today, bringing drier weather. The high will then move east of the area tonight and Friday.
131 PM EDT Thu Jun 27 2024 *Seasonable end to the week with comfortable humidity *Return of heat+humidity fuels T-storms this weekend *Cooler & dry start to July; heat & T-storms by the 4th Cu will crumble this evening setting up a refreshingly cool and mainly clear night across central PA. Beneath dome of 1020mb high pressure, synoptic conditions support fog formation late tonight into early Friday morning in the river/stream valleys across the western and northern Alleghenies.
/Issued 105 PM CDT Thu Jun 27 2024/ /Through Friday/ An upper ridge currently centered over far West Texas and southeastern New Mexico will gradually trek east over the state of Texas the next couple of days.
(Tonight through Friday night) An upper-level ridge will be the primary driver of the weather the next couple of days. Lows tonight remain persistent, from the mid 70s inland to the lower 80s along the coast. The increase in moisture will lead to a degree or two warmer low temperatures on Friday night.