Aikyam-Lab/Synoptic-Bench huggingface dataset:
233 PM EDT Mon Sep 27 2021 A warmup is expected as high pressure shifts off the coast. A cold front will bring a very gradual return of more seasonable weather late in the week. Nice and quiet weather continues for our area as high pressure overhead shifts offshore tonight and dry air column persists. With high pressure offshore and mostly clear skies, temps Tuesday will increase to mid to upper 80s. A prefrontal trough moves across the area Tuesday night, but with moisture well to the northeast and low PWATs locally the most we'll see is a wind shift and a few clouds overhead. Lows Tuesday night in the low 60s.
ECWMF is very consistent with trying to keep mid state as dry as possible, but now showing some indication of weakening of upper level ridging influences along with an increased influx of low level moisture that would allow some isolated convection to develop.
Discussion: Aloft, an omega pattern is in place over CONUS with H3 troughing occurring across the NE and NW while ridging is prominent over the central plains. High pressure centered across the southern Appalachians will remain dominant at the surface. In regards to high temperatures on Tuesday, more persistent southwesterly flow along with H5 ridging slowly shifting eastward will act to increase temperatures by a few degrees relative to today. The forecasted temperatures of low 80s are roughly 3-6 degrees(F) warmer than normal. Discussion: Quiet and generally pleasant weather will likely continue through the second half of the work week, as we sit between a couple of low pressure systems on the west and east coasts of the United States.
(This evening through Tuesday) Afternoon water vapor imagery shows an upper level low spinning over eastern New Mexico. High res model guidance shows additional shower and storm development this afternoon across the Lower Trans Pecos. For tomorrow, the upper level low is forecast to move northward into Colorado before becoming absorbed into the mean 500mb flow.
1252 PM CDT Mon Sep 27 2021 (Today and tonight) A mid-level trough will start to move into the Southern Plains today. Temperatures today should be in the low 90s, and lows tonight in the mid 60s across Oklahoma.
Southerly flow is ushering in a warmer and more moist airmass compared to previous days. Upper level ridging will begin to build in from the west on Tuesday, furthering our uneventful wx. The period begins with the omega block pattern set up across the CONUS, with ridging extending from the Southeast US into the Upper Midwest and Upper level trough in the Western US and upper level low centered across Maine.
Today will feature the warmest temperatures with highs in the lower to middle 80s. A weak cold front then brings temperatures back to more seasonable levels for the remainder of the week. Lower 20C at 925mb to Weak, dry cold front from northern Upper Great Lakes to drop southeast into CWA this evening/overnight. Backdoor cold front continues southward through CWA tonight. Shallow nature of cold air infiltrating CWA and ridging aloft as centroid of omega block nears as it envelops Upper Great Lakes to Gulf Coastal region through the forecast period. A slowly sinking cold front is expected to pass through the terminals overnight.
225 PM CDT Mon Sep 27 2021 Plenty of sunshine is observed across the region today as high pressure builds into the region from the west. However as the area of high pressure slides further east into the Great Lakes Region, winds increase from the southeast between 500 to 1000 ft AGL to around 20 knots as depicted by model guidance soundings. The upper level flow is currently progressing toward the omega blocking pattern that has been advertised to develop by the middle of the week. The wild card in how this breaks down continues to be the remnants of the cut off upper level low currently over the Desert Southwest and how progressive the incoming system off the Pacific will be.
/Issued by National Weather Service Shreveport LA/ Another beautiful day remains on tap today for the Mid-South, although a SSW low level flow has deepened and increased across the region, on the backside of sfc ridging which has shifted E into the TN Valley into AL/GA.
245 PM CDT Mon Sep 27 2021 A closed low across NWRN NM will slowly drift northeastward, slowly weakening with time, becoming an open trough across the central plains Tuesday night. Another trough axis will move into the Great Basin/ desert southwest on Tuesday. On Tuesday, as the upper low lifts into CO, the dryline is expected to race eastward during the morning becoming positioned across the Rolling Plains by the afternoon.
A more substantial upper trough is noted off the coast of British Columbia and the Pacific Northwest. At the surface, weak low pressure is situated over western KS with high pressure centered over the southeast CONUS, resulting in a bit stronger of a pressure gradient in east central KS where southwest winds have been a little breezier. Increasing cloud cover as the upper low approaches could keep temperatures down a few degrees in the afternoon, but it still looks like a seasonably warm day with highs around 90 degrees.
119 PM EDT Mon Sep 27 2021 Shower and thunderstorm chances return for late tonight and Tuesday with a crossing cold front. High pressure returns tomorrow night, and a period of dry weather and seasonable temperatures can be expected for the rest of the week. A mostly sunny sky will remain in place this afternoon as high pressure tracks to our south. Gusty wind of up to 25 MPH will continue this afternoon with a decent surface pressure gradient between the high and an approaching cold front. The cold front will drop south across the Great Lakes through the night. The surface cold front will be in the vicinity of I-80 at sunrise on Tuesday.
An upper trough-ridge-trough pattern will be in place over the northern half of the CONUS and southern Canada by this evening. Across the southern CONUS, an upper ridge is currently residing over the western Gulf of Mexico and ARKLATEX region, with the upper cutoff low centered over west central New Mexico. This southern CONUS ridge will quickly build northward, and effectively merge with the northern plains ridge by this evening. The merged upper ridge will continue to amplify overnight into Tuesday, and become highly amplified by late Tuesday afternoon over the Mississippi River in response to both the western and eastern troughs digging southward. Lows tonight are expected to bottom out in the low to mid 60s inland, upper 60s to around 70 along the coast.
An amplifying trough will send a cold front slowly south- southeastward from the Lower Great lakes tonight. Showers will accompany the cold front through CPA during the day Tuesday.
Issued by National Weather Service Shreveport LA 1013 AM CDT Mon Sep 27 2021 Another beautiful day remains on tap today for the Mid-South, although a SSW low level flow has deepened and increased across the region, on the backside of sfc ridging which has shifted E into the TN Valley into AL/GA.
Hennig (This afternoon through Tuesday night) An upper low/trough is centered over the Arizona and New Mexico border. This trough has increased upper level lift over West Texas and Southeast New Mexico. The upper low will lift northeastward on Tuesday with the bottom portion of it over West Texas and Southeast New Mexico. Temperatures on Tuesday will be similar or slightly warmer than today.
Red Flag Warning remains in effect for tomorrow for central and eastern zones ahead of a strong cold front late in the day. Chambers High pressure and downslope flow did not disappoint today as temperatures have climbed to reach 90 in far eastern MT as of 130 PM. The prominent cutoff upper low just off the coast of the Pacific Northwest finally moves inland, bringing with it a strong cold front to cross the area throughout the afternoon.
745 PM EDT Mon Sep 27 2021 High pressure centered over the region this morning will slide offshore through Tuesday.
/22/ Tonight and Tuesday: Most of the area remains cloud- and rain-free this afternoon, but change is on the horizon as a warm front lifts northward across the area overnight, taking our fall-like weather with it. During the daytime, along with dewpoints increasing back into the lower 70s across much of the area, scattered to numerous showers will become more numerous through the afternoon along with embedded convection.
The large 500 mb closed low over the Desert SW will start to open up over the next 24 hours and this will start to erode away the ridge axis in place over the RGV. /issued 318 PM CDT Mon Sep 27 2021/ SHORT TERM (Tonight through Tuesday Night): A 500mb ridge is expected to continue to bring drier conditions to the CWA tonight into tomorrow. The ridge currently situated over Texas starts to move eastward through the day Tuesday while a trough moves in its place.
523 PM MDT Mon Sep 27 2021 The latest water vapor and 500-mb height analysis showed a broad ridge over region that will maintain dry and unseasonably warm weather over the forecast area through Tuesday (early evening).
High pressure layered from the srn Atlantic Basin into much of the SE states remains in control of the overall wx pattern. Overnight temps look to trend perhaps a couple of degree warmer compared to the last few mornings, with lows mainly in the upper 50s/near 60F.
SR Chattanooga Airport, TN 59 83 61 85 63 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 58 83 59 85 61 / 0 0 0 0 0 Oak Ridge, TN 57 82 59 84 61 / 0 0 0 0 0 Tri Cities Airport, TN 55 81 56 83 56 / 0 0 0 0 0.
232 PM PDT Mon Sep 27 2021 Cooler with periods of showers and breezy winds today into tomorrow morning with best precip chances over the Sierra and Southern Cascades.
/issued 245 PM CDT Mon Sep 27 2021/ A closed low across NWRN NM will slowly drift northeastward, slowly weakening with time, becoming an open trough across the central plains Tuesday night. Another trough axis will move into the Great Basin/ desert southwest on Tuesday. On Tuesday, as the upper low lifts into CO, the dryline is expected to race eastward during the morning becoming positioned across the Rolling Plains by the afternoon.
The cold front will continue to move across southeast Oregon tonight and into southwest Idaho early Tuesday morning. A strong Pacific cold front passed KBNO and KBKE this evening and will pass KMYL 05z-06z, KEUL/KBOI 08Z-09Z, and KTWF/KJER before 18z/Tue.
Tonight will be clear, but not as cool for inland areas as dewpoints are a little higher compared to last night into the low to mid 60s as high pressure has pushed east today over the waters off the Carolina coast. Expect nearly calm winds overnight inland and light and variable at the beaches with lows in the low 60s over SE GA and the mid 60s over NE FL with upper 60s at the coast. High pressure will settle southward just to our east over the local coastal waters on Tuesday with scattered clouds and light and variable winds around 5 mph inland and becoming easterly at the coast in the afternoon around 5-10 mph. Temperatures tonight will be a few degrees warmer than last night with lows in the low/mid 60s inland and upper 60s coast.
713 PM EDT Mon Sep 27 2021 A warmup is expected as high pressure shifts off the coast.
322 PM MDT Mon Sep 27 2021 Current observations across the region show dew points ranging from the upper 20s to lower 30s across the region while a high pressure system remains dominate over the state. This evening winds will decrease due to a low pressure system moving eastward decreasing the pressure gradients for areas east of Interstate 25. A change of pace will occur Tuesday as high temperatures will be cooler due to a trough arriving in the afternoon. A cold front knocking on our door at midnight will sweep through the forecast area by sunrise, with a marked difference in temperatures and highs 15 to 20 degrees cooler than previous days.
Transition out of September will be accompanied by a period of dryness as high pressure remains the dominant feature across the SE states and eastern Gulf. Inland locations can be expected to be a little cooler at night due to diurnal tendency of backed winds and less influence from the still warm Atlc waters. Some Atlc sprinkles or light showers wl become psbl by Thu as incrsg near sfc moisture begins to sneak over the Treasure Cst under the weakening ridge. Presence of high pressure to the proximity and N of the waters will produce mostly favorable open water conds with a swell component emanating from the open Atlc.
607 PM CDT Mon Sep 27 2021 An upper-level ridge is currently building over the central U. as a closed low spins over the Desert Southwest. The positioning of the ridge has the Middle Mississippi Valley under northwest flow aloft. With 850 mb temperatures around 20 degrees C this afternoon and gusty winds out of the southwest, high temperatures in the low 90s are possible for many locations. Tomorrow, the cut-off low over the Southwest will begin to become absorbed into a trough pivoting over the western U. and impede upon the ridge centered over the Great Plains. This will cause the ridge to shift eastward and mid-level temperatures to cool a couple degrees to around 18 degrees C. In turn, afternoon highs will be a degree or two cooler on Tuesday compared to Monday.
630 PM CDT Mon Sep 27 2021 (This evening through Tuesday) Afternoon water vapor imagery shows an upper level low spinning over eastern New Mexico. High res model guidance shows additional shower and storm development this afternoon across the Lower Trans Pecos. For tomorrow, the upper level low is forecast to move northward into Colorado before becoming absorbed into the mean 500mb flow.
No significant changes to the previous forecast this afternoon as things still appear be on track with another unseasonably warm day Tuesday ahead of an upper level low expected to reach the area Tuesday night.
723 PM EDT Mon Sep 27 2021 Expanding coverage of VFR stratocu/stratus accompanies a cold front from north to south across SE MI this evening. Cold front is currently over Mid MI slowly drifting southward and will continue to do so through this evening. A upper level ridge will be advancing eastward across the Plains while narrowing and amplifying into the Plains of Canada. Meanwhile a closed upper low over eastern Canada will be dropping southward over the mid atlantic coast blocking the ridge and stalling it over the western Great Lakes through the mid week period. We should be locked in with northwesterly confluent flow aloft with expansive high pressure building south from Canada. Temps will be near seasonal averages with highs in the low to mid 70s and lows bouncing around on either side of 50.
The increase in cloud cover will help maintain slightly warmer than normal temperatures through morning. /22/ Prior discussion below: Tonight and Tuesday: Most of the area remains cloud- and rain-free this afternoon, but change is on the horizon as a warm front lifts northward across the area overnight, taking our fall-like weather with it. During the daytime, along with dewpoints increasing back into the lower 70s across much of the area, scattered to numerous showers will become more numerous through the afternoon along with embedded convection.
An upper level trough continues to bring showers and the potential for isolated thunderstorms to western Washington today.
Slightly cooler temperatures will return for late this week into the weekend. Aloft, an upper low is located over the four corner region with an upper trough moving across the Great Lakes region with northwesterly flow over our area.
441 PM PDT Mon Sep 27 2021 Updated air quality section A trough of low pressure will move through the region tonight bringing gusty winds and cooler temperatures.
936 PM CDT Mon Sep 27 2021 (Issued 935 PM CDT Mon Sep 27 2021) High pressure to our north will gradually sink south tonight towards the area. Still seeing some gusty winds over Lake Michigan, which is keeping lakeshore areas a little warmer. Stumpf (Issued 309 PM CDT Mon Sep 27 2021) Tonight through Tuesday night: High pressure will build into the area tonight into Tuesday, keeping skies mostly clear through tomorrow night. The NAM is showing fog possible tonight, but the RAP and GFS are much drier in the low levels, so left out mention of fog for now. Onshore winds will keep it a bit cooler near the lake.
609 PM CDT Mon Sep 27 2021 Plenty of sunshine is observed across the region today as high pressure builds into the region from the west. However as the area of high pressure slides further east into the Great Lakes Region, winds increase from the southeast between 500 to 1000 ft AGL to around 20 knots as depicted by model guidance soundings. The upper level flow is currently progressing toward the omega blocking pattern that has been advertised to develop by the middle of the week. The wild card in how this breaks down continues to be the remnants of the cut off upper level low currently over the Desert Southwest and how progressive the incoming system off the Pacific will be.
High pressure remains across the silver state with continued near to record heat.
452 PM MDT Thu Jun 3 2021 Water vapor shows large upper ridge over the Western CONUS extending into the Plains, with center of high over the Great Basin. At the surface, weak trof extends from northeast to southwest across SD.
Petr 154 PM CDT Copy, paste, and repeat! It's another warm early-summer day with current temperatures in the lower 80s, a westerly breezy, and mostly sunny skies. Overnight lows will fall into the low to mid 60s. Friday will be similar to today though with highs a few degrees warmer and in the upper 80s to around 90. An upper ridge will build across the region this weekend with high temps expected to reach the upper 80s to lower 90s.
548 PM CDT Thu Jun 3 2021 The upper level trough that brought us the mid-week clouds and precipitation chances is finally pushing east of the region. Given very weak shear, fairly limited instability, and mid/upper level height rises on the back side of the departing trough, these storms should remain weak and short lived, ending around or before sunset. BSH As we move toward the weekend, broad upper level ridging will build eastward into the north-central portion of the country.
1058 PM EDT Thu Jun 3 2021 In spite of virtually nil onshore component to the low level winds, rapid proliferation of nocturnal showers has commenced over land (along the Treasure Coast), leaving no choice but to raise POPs over and a little downstream of that area.
A cold front has just about made it all the way across Middle Tennessee.
Cooler mid 60s look like a good bet over the north tonight in the drier airmass while minimums around 70 look likely in the soupy airmass to the south. /GG/ Tomorrow night through Thursday: The forecast period starts off tomorrow night with a cutoff low meandering over central Texas as ridging builds in over the Great Basin.
627 PM CDT Thu Jun 3 2021 A few lingering showers over the eastern Ozarks were ongoing this afternoon underneath an exiting upper level trough of low pressure. This will create mainly sunny conditions on Friday with highs in the low 80s. Mostly dry weather is expected as afternoon highs warm into the low to mid 80s.
a mid/upper level low was positioned over West/Southwest Texas. Upper level southerly flow on the eastern side of the upper trof axis was lifting scattered cirrus clouds into Eastern Oklahoma and Northwest Arkansas. high pressure remained common with light winds reported over the region.
On Friday, the slow moving upper low will be positioned just to our southwest. /Issued 203 PM CDT Thu Jun 3 2021/ /Friday Night Onward/ A mid-level trough and abundant Gulf moisture will remain parked over North and Central Texas for the next several days, bringing additional chances for showers and thunderstorms.
Temperatures remain mild throughout the forecast area as low pressure persists. A ridging pattern has aided in the clearing of stratus at coastal areas. Temperatures remain mild in the interior and most of the forecasts area as low pressure persists on the surface. A cooling trend persists through the weekend as another front is expected to pass through Friday evening and the ridge weakens yet again.
An upper level trough continues to rotate northeast over the Lower Ohio Valley and may have played a partial role in the brief strengthening of a thunderstorm over Harrison County IN. Sfc cold front draped south through central KY continues to push eastward, and the window is beginning to close for strong convection. Current sfc analysis places the cold front across western Kentucky, evident by NW winds on the Kentucky Mesonet. By this evening, precip should begin to taper off as the sfc front pushes east, but the upper trough axis should still be located across the Ohio Valley through the short term. Friday morning lows are forecast to drop into the upper 50s across the region, slightly cooler than climo. Temperatures will climb into the low to mid 80s under with light west winds.
Otherwise we continue to sit on the western edge of the strong upper level ridge. The upper level ridge will continue to push to the east tomorrow as a trough starts to push into the PacNW.
732 PM EDT Thu Jun 3 2021 WV imagery and RAP analysis indicated a mid/upper level ridge from the southwest CONUS to Saskatchewan and a trough into the central Great Lakes resulting in northwest flow toward Upper Michigan. Lingering low level moisture along with clearing and temps dropping into the low to mid 50s will result in potential for patchy fog development. Friday, as the mid level ridge builds into the region with increasing southwest low level WAA (850 temp to around 18C) temps will climb into the mid and upper 80s. SSW winds at or below 10 mph will be weak enough to lake breeze development off of Lake Superior with some cooler air near the shore. A fairly broad ridge over the plain states, will continue to move toward the upper Great Lakes region during the weekend.
1019 PM EDT Thu Jun 3 2021 Low pressure and its accompanying cold front will weaken while moving through the region overnight through Friday. The front will wash out offshore over the weekend, as weak high pressure settles across the local area. Late this evening, a cold front was still back in SE OH and ern KY. With the cold front slowly approaching from the west overnight, and the upper trough still west of the region, expect more sctd showers and isolated tstms to redevelop overnight into Fri morning. Broad trough aloft will swing through the region Fri into Fri night, gradually pushing the bulk of the significant moisture S and E of the FA. Variable clouds/partly sunny Fri with highs mainly in the lower-mid 80s. High pressure builds over the area for Sat.
657 PM EDT Thu Jun 3 2021 Strong to severe thunderstorms remain possible this afternoon and evening over the Lower Susquehanna Valley. Low pressure center to our north will also slide eastward and drag a weak trough/cold front in from the west late tonight. Cold front/trough will be just into the western zones around sunrise. Will keep the highest PoPs in the SE where they'll have more time to cook.
916 PM CDT Thu Jun 3 2021 Light winds and dry airmass over the region may allow for a bit cooler temperatures so did bump temps down slightly overnight. The upper level ridge responsible for the increase in temperatures today will continue to remain the main player in our weather pattern during this forecast period.
1930Z water vapor imagery shows upper level ridging over the western half of the country. At the surface, weak high pressure remained over the region.
608 PM CDT Thu Jun 3 2021 (This evening through Friday) An upper trough remains over our area this afternoon. A weak closed low is expected to develop over the southern half of our area overnight with a slow eastward drift on Friday. The higher Pops and greater coverage will be generally across the area southeast of a Brownwood to Sonora line on Friday. Little temperature change is expected, with forecast lows tonight in the lower to mid 60s, and highs Friday in the upper 70s to lower 80s.