Aikyam-Lab/Synoptic-Bench huggingface dataset:
Clouds are increasing ahead of an approaching low pressure system with southerly flow increasing at the surface. Precipitation will increase over the higher terrain initially as forcing for ascent arrives and this will spread south and east with time. Cold front will push offshore by Saturday night, but the broader upper trough will remain over the area for the next several days. There may be a few stronger waves which rotate through the trough providing a better focus for precipitation, but for the most part precipitation chances are based on afternoon heating beneath the cool trough aloft generating instability and daily scattered showers. Given the light flow pattern, expect a sea breeze most days which will keep the coast a little cooler and limit the precipitation chances there.
323 AM CDT Fri Jun 23 2017 The cold front has cleared the CWA early this morning with breezy northwest winds in its wake as cooler air begins filtering in from the north. Even cooler temperatures are expected on Saturday with 850 mb temps remaining in the single digits. This low could also generate some shower activity over the far east and will leave in small chance POPs. Highs will likely only reach the lower 60s across eastern areas on Saturday, which is well below normal.
323 AM CDT Fri Jun 23 2017 Cold advection behind yesterday's front will persist through tonight as the main upper low works toward the region.
441 AM EDT Fri Jun 23 2017 High pressure extending into the forecast area from the Atlantic today will weaken tonight ahead of an approaching cold front.
404 AM CDT Fri Jun 23 2017 Generally northerly flow aloft is expected to continue through the next seven days with a nearly stationary upper ridge centered across the southwest United States. It will be another day of significant heat across much of west Texas as 850 millibar temperatures soar with aid from compressional heating south of an advancing cold front. Thunderstorms will also be possible by this afternoon across the northern Permian Basin and southeast New Mexico, closest to the southward advancing cold front. Tonight still appears to be a stormy one as the aforementioned strong cold front plunges south into the region with a strong upper level disturbance.
High pressure will continue to strengthen along the west coast, placing western Montana and central Idaho under dry and warm northwesterly flow aloft into this weekend.
This drier air mixing in will keep showers and thunderstorms more isolated locally, with the highest chances in southeast AL. Mid level high anchored off the Atlantic coast will be the dominant mid level feature through Friday night at which time this high will elongate and be replaced by an approaching mid level trough.
This should allow temperatures to climb into the lower and middle 90s like today. High pressure will remain across the waters with a southeast to south flow shifting to onshore near the coast each afternoon through Saturday.
320 AM CDT Fri Jun 23 2017 GOES 16 non-operational water vapor imagery nicely shows cutoff upper lows upstream over southwest Ontario and central Saskatchewan, both slowly drifting southward in broad cyclonic flow aloft. These features will help maintain the deep upper trough over the Great Lakes region, leaving the Northern Plains in continued cool northwest flow. Stratus deck currently in place over much of the state, including some isolated showers, will gradually erode during the day, though linger farther east closer to upper low.
326 AM MDT Fri Jun 23 2017 An upper level ridge will remain along the West Coast today with a slightly unsettled northwest flow aloft continuing over Montana.
Gradual reduction in mid level heights through the weekend period, as broad upper troughing expands over the region. This will leave weekend conditions defined as cooler and less humid.
A ridge of high pressure will continue to build off the west coast and begin to expands its reach into the Pacific Northwest on Friday. This will lead to warmer temperatures of 5 to 10 degrees across the forecast area Friday. A dry high pressure system over the e pac will continue to build into the pacnw for the next several days.
1237 AM CDT Fri Jun 23 2017 For the 06Z TAFs: We will begin the period in VFR conditions, but we should start to deteriorate to MVFR conditions for ceilings later this morning as the lower levels saturate. Otherwise, it will be breezy today behind a cold front that will have a strong pressure gradient. Cold front expected to pass terminals between 06z and 11z Friday, with north northeast surface winds gusting into the 30 to 40 kt range through at least most of the morning. High pressure will continue to amplify over the west as the upper level trough digs down the central and eastern CONUS. A cold front will work its way south tonight across the Panhandles, bringing a relief in temperatures over the next few days.
Deep layer subtropical ridge over the southwest Atlantic will extend west across the Florida peninsula and produce below normal rain chances again today. Pocket of dry air will rotate NW across the area around low level ridge with some relative moistening moving back in across the south. High temperatures will reach the low-mid 90s interior and upper 80s/near 90 at the coast. Lows generally in the low to mid 70s, except upper 70s at the immediate coast.
500 AM MDT Fri Jun 23 2017 Cold front with accompanying showers and thunderstorms was in nern CO as of 10z, and will drop south through the region this morning, bringing a period of at least light rain to most of the eastern mountains and plains through midday. Clouds will continue to thicken this morning over eastern mountain slopes and across the plains, with mostly cloudy skies lingering into the evening, leading to very cool max temps, and a few locations will end up nearly 30f cooler than Thu.
As the moisture and remains of Cindy get picked up in the westerlies, the moisture along the axial bands are getting stretched and sheared along the east side of the upper trough north of the area. The line of sh/ts will get reinvigerated today with heating but will also begin to become more oriented east/west through saturday as it becomes more involved with a cold front that will be moving into the area as early as Saturday evening before slowing to a crawl.
An upper level closed low is stacked atop this system, with a vortmax analyzed northeast of the centers, running from near the MO Bootheel to SW Indiana. As the day continues, a cold front will swoop down from the Midwest and Cindy will become absorbed as a low along this front. Widespread showers and scattered storms will develop in the warmer airmass ahead of this low. Shear profiles ahead of this low would argue for some rotating thunderstorms developing in the afternoon hours, so with low LCLs and some potential for insolation over southern KY (see clearer skies now over western TN/northern MS), will have to watch for some isolated quick spinup tornadoes in addition to the heavy rain threat.
This low is forecast to move N through this morning before turning NE and accelerating as it moves across KY this afternoon and into SE Pennsylvania by Saturday morning.
Meanwhile, the outer fringes of decaying tropical cyclone Cindy began pushing into east central/southeast Kansas in the form of a stratocu cloud deck. Also at the surface, a weak surface cyclone was located near the central KS/central NE border with a cold frontal boundary arching NE and a dryline extending to the SSW. This front will slide SE in response to an amplifying upper level trough digging SE across the Northern Plains. Much cooler air pushes southward for Friday behind the front with H850 temps falling to +13 C and surface temps likewise falling to the upper 70s to around 80. Area remains under the influence of a cooler airmass Saturday, although a late day passing wave may bring clouds across in the afternoon, possibly a shower, but chances are low enough not to include in the forecast at this time.
230 AM CDT Fri Jun 23 2017 A surface cold front was sinking southward across Kansas during the predawn hours. The front will continue to push further south with cooler/drier air overspreading the region as northwest flow aloft provides a decent push on the frontal boundary.
Cold front will move over northwest parts of Oklahoma early in the period and progress over rest of region during the day shifting winds to northeasterly. The cold front is expected to begin to move into NW parts of the fa early tomorrow morning with showers/storms remaining possible Friday. A cold front will move south across the area late tonight and through the day on Friday. The front will also bring noticeably cooler air into the northern/central part of the area. This front makes a good push to our south by late June standards taking the edge off of the high temperatures for a few days. We remain under northwesterly flow aloft and continue with some chances of precipitation with both the moisture return from the south and the possibility of convection moving off the High Plains toward the area.
Upper ridge off the northwest coast moving slowly east. Northwest flow aloft decreasing as the ridge comes closer.
457 AM EDT Fri Jun 23 2017 High pressure extending into the forecast area from the Atlantic today will weaken tonight ahead of an approaching cold front.
The approach of Cindy's mid-level trough will foster the development of numerous showers and storms particularly along and northwest of I-59 later today. As the remnants of Cindy zip off to the east, an upper-level trough will push a cold front southward tonight.
602 AM EDT Fri Jun 23 2017 High pressure extending into the forecast area from the Atlantic today will weaken tonight ahead of an approaching cold front.
436 AM CDT Fri Jun 23 2017 The next 24 hours are going to be dominated by the large upper low over the James Bay area, producing cyclonic flow over the region. This extra cloud cover is going to keep conditions cooler today than yesterday, with highs mainly in the 60s for northern Minnesota, with lower 70s mainly for northwest Wisconsin. Lows to be warmer than this morning as well, staying in the 40s for most locations.
Broad upper trof will be swinging through the Great Lakes over the weekend as upper ridge builds over the west coast. Northwest flow into Montana will keep temperatures generally below normal but with a warming trend expected as the ridge pushes east. High pressure sliding down the front range will provide pressure rises and gradient for another breezy day in northeast Montana. High pressure pushes east over the weekend for diminishing winds.
359 AM CDT Fri Jun 23 2017 The main weather stories for North and Central Texas will be the heat today and then thunderstorm chances late this afternoon through the weekend along with some cooler weather. A cold front that extended from northeastern Kansas southwest into the Texas Panhandle at 3 AM will move into the northwestern part of the forecast area late this afternoon and through all but the southeastern zones by sunrise Saturday. The summer cold front will sweep through the rest of the forecast area Saturday night.
434 AM EDT Fri Jun 23 2017 Tropical Depression Cindy was over Arkansas this morning and by Saturday morning will be over Maryland with a cold front trailing into the Southern Plains.
An upper ridge, with an axis roughly along 130W longitude, will gradually shift east through this period.
Moisture in the lower levels is expected to increase by Friday night.
A cold front is trudging slowly southward into the region. The frontal boundary does get hung up across west central portions of Kansas/eastern Colorado overnight and on thru Friday due to strong ridging from the north and a stagnant low over eastern NM/western TX. looking for highs to be cooler west in the lower 70s. Will start the period under upper ridging, but that quickly weakens leaving a zonal flow in the middle of the week.
608 AM EDT Fri Jun 23 2017 High pressure extending into the forecast area from the Atlantic today will weaken tonight ahead of an approaching cold front.
The remnants of this tropical system are expected to turn northeasterly today with the low center just clipping the northwest corner of Middle Tennessee around mid-afternoon. The strongest convection will likely be concentrated on the eastern side of the low.
339 AM MDT Fri Jun 23 2017 Cold front will drop through Denver over the next few hours.
237 AM MDT Fri Jun 23 2017 Two upper lows are spinning over parts of Canada, and a wave associated with the Ontario low is pushing into the northern plains, producing a few light showers over northeastern WY and southwestern SD. An upper ridge is building over the west coast. Following a cold front, winds are northwesterly, and gusty across the western SD plains. Showers will dissipate early this morning as the wave shifts southeast and high pressure pushes into the region. Under mostly sunny skies, highs will be much cooler, in the mid 60s to lower 70s. Cool high pressure will keep highs about 10 degrees below normal on Saturday, in the mid 60s to mid 70s.
A cold front sweeping through early Saturday will return comfortable humidity levels by the weekend. There should be not a lot of precipitation around during the morning and early afternoon hours, however with the approach of a the cold front during the afternoon hours this will trigger storms and interact with moisture associated with Cindy. The cold front crosses during the overnight hours Friday night so come daylight Saturday any measurable QPF should be east of the mountains. Highlights: - Cooler weather - No signs of a high water threat Full latitude trough will bring a period of below normal temperatures to the region.
although it seems to have the low/Cindy a bit too far North. However as the low/Cindy moves to the Northeast. After Cindy moves out of the area this evening and a cold front shifts through the area tonight there does not appear to be any enhanced chance of rain for the next 7 days. As a result, rain chances will persist through much of the period as the tropical remnants combine with a cold front.
Meanwhile, upper level and surface ridging continue to build in across the Gulf of Mexico and Florida peninsula.
511 AM CDT Fri Jun 23 2017 Surface cold front will move across the fcst area this morning with north to northeast winds in the breezy to windy categories with higher gusts at times behind this boundary. Low level moisture will be slow to return until later this weekend due to the drier atmosphere behind the cold front.
256 AM MDT Fri Jun 23 2017 Cooler conditions, relatively speaking, will move into the area today behind the cold front and trough that passed through the area yesterday.
Upper air analysis last evening showed a weak trough over Texas. There was a cold front moving into the northern Panhandle. High pressure centered over the Gulf will continue to dominate today with hot conditions. Tonight the cold front will approach our area and Saturday it will move in.
The low pressure system itself will move into western Tennessee and then slide east northeast and begin to merge with a cold front. As the low gets closer to the area we will see an increase in showers and storms once again, this time along and north of the I-20 corridor. By Saturday, Cindy will have merged with a cold front coming down from the north and be well removed from the area. However, the front, the continued moist air mass, and a lingering weakness in the subtropical ridge will result in a continued wet pattern through the weekend, with the potential for continued flooding concerns.
328 AM EDT Fri Jun 23 2017 High pressure looks to continue to dominate the weather pattern through the weekend.
Stratus clouds off to our northwest will be moving in tonight as cooler Canadian air advects in. Cooler temperatures will continue filtering into the area behind a low pressure crossing southern Canada. An upper low moving thru Ontario into the western Great Lakes region during the upcoming weekend will bring a relatively cool, northwesterly flow pattern to the Dakotas and Minnesota. Can't rule out a few instability type showers in our northeast CWA on Saturday closer to some mid level energy rotating around the aforementioned upper low.
Wind out in the Delta are already gusting to 25 kt as cooler marine air oozes inland.
Cold front making its way into far northwest Oklahoma early this morning with a steady progression south and east through the day expected. Some acceleration possible late this morning and this afternoon as s/wv trough currently moving through Colorado progresses eastward. This trough will also allow scattered storms to develop near and north of the front.
An upper ridge will bring dry weather with a warming trend through the weekend.
350 AM PDT Fri Jun 23 2017 Strong high pressure will continue to bring hot weather to the Southern California interior while the marine layer will dominate near the coast. Temps today will be similar to yesterday, a couple degrees warmer in the deserts as the ridge becomes a little better oriented and slight westward shift, and perhaps a few degrees lower west of the mtns due to the deeper marine layer. Weak mid level moist S flow around the high will bring some thin moisture into Southern California through today with a few Cu buildups likely over the mountains but not enough of the prime ingredients to generate showers or storms. For this weekend the ridge strengthens a bit and will bring a warmup for well inland, mountain, and desert locations.
A bit warmer based on 700 mb temperatures and thicknesses.
High pressure building into the region will bring dry conditions through the weekend, with lingering valley clouds and fog across parts of the interior.
424 PM MST Fri Jan 12 2018 Early afternoon water vapor imagery showed an upstream upper ridge axis along the West Coast and downstream upper trough axis over the MS Valley. Short range model/ensemble guidance is in good agreement this weekend with the upper ridge amplifying from the Great Basin into western Canada, and downstream upper ridge nearly stationary over the eastern half of the CONUS.
However, the heavier snowfall is winding down as the upper low exits our area to the east, and thus allowed the Winter Storm Warning to expire and trimmed back the Winter Weather Advisory to just the northeastern part of the forecast area. Snow continues to affect all four terminals on the backside of the upper level low.
The effects of high pressure will continue Saturday with highs only expected to be in the 50s as the H9-H7 layer cools substantially through tomorrow.
634 PM CST Fri Jan 12 2018 High pressure remains situated over western and central North Dakota tonight. Areas of light snow and clouds over my southwest and far south central continues to shrink in coverage as the mid level wave starts to exit southeast and as strong Arctic high pressure builds south into the Northern Plains.
906 PM CST Fri Jan 12 2018 Surface ridging nosing into Southeast Texas continues to result in decreasing winds this evening with 9 PM temperatures in the mid 30s to lower 40s. The current forecast handles temperature trends well with most inland locations experiencing freezing or below freezing temperatures tonight. /ISSUED 536 PM CST Fri Jan 12 2018/ VFR conditions will prevail through the TAF period as high pressure continues to build into SE TX this evening. Most inland locations will see freezing overnight temperatures tonight and Saturday night.
The cold front has moved through the entire forecast area. Some patchy freezing drizzle has also been reported in southern plateau counties. Chattanooga Airport, TN 21 35 19 36 / 30 10 0 0 Knoxville McGhee Tyson Airport, TN 24 32 17 32 / 40 10 10 0 Oak Ridge, TN 23 33 16 34 / 50 10 10 0 Tri Cities Airport, TN 25 31 13 31 / 50 20 10 0 TN.
High pressure remains anchored over the Great Basin through the weekend with weak pulses of energy bringing some high clouds in and out of Utah and Colorado.
Latest MSAS analysis indicates 1043 MB ridge axis draped acrs the northern plains down acrs the MO RVR Valley, with lee side pressure gradient maintaining acrs the mid and upper MS RVR Valley with brisk afternoon winds. Cold core L/W trof was occupying much of the central into eastern CONUS, while an embedded wave was getting booted up the OH RVR Valley.
553 PM CST Fri Jan 12 2018 High pressure will maintain north to northwest winds between 5 to 10 knots this evening, possibly diminishing to 5 knots around daybreak.
328 PM MST Fri Jan 12 2018 Upper level trough will move south of the area this afternoon.
/ISSUED / Temperatures are now below freezing across just about the entire mid state. Values range from near 20 west, to the lower 30s Plateau.
The tight pressure gradient between this high and and an area of low pressure over the eastern Great Lakes will keep winds elevated tonight.
731 PM EST Fri Jan 12 2018 Reports of rain changing to snow or a mix of sleet and freezing rain or even all sleet from Rowan County to Whitley County. An area of low pressure over Tennessee will push northeast across far southeast Kentucky tonight associated with this wave. We do lose ice for a short time this evening under the dry slot, so we could see a period of freezing drizzle as temperatures drop to or just below freezing. Ice will be quickly reintroduced into the low level clouds later this evening as the low levels cool off rapidly. An overall cold period is in store, with an eastern North American trough dominating our weather until late in the week.
High pressure across our region will bring dry and mild weather through the Martin Luther King Jr.
933 PM EST Fri Jan 12 2018 A southern stream low pressure system moves northeast across the region into Saturday.
No significant changes were made to the previous forecast, as a cold front is moving east of our area and much cooler/drier air pushes into our area under brisk northwesterly flow. Strong cold air advection has already dropped temperatures into the lower 40s across parts of SE Alabama, and based on latest trends and model guidance, forecast low temperatures have been dropped by a couple of degrees north and west of Tallahassee.
Temperatures are in the lower to mid 70s. A cold front will pass through the Florida Keys after midnight tonight. No more than slight chance POPs are needed overnight ahead of and along the aforementioned cold front.
Pre-frontal shower activity has pushed into the Atlc and small window of mostly clear/partly cloudy skies has developed across SE GA/NE FL ahead of approaching cold front which is currently across SW GA/NW FL. A few light showers will be possible with the frontal passage across inland SE GA but rest of the area will see dry cold frontal passage with just increase in clouds. SCEC/SCA headlines still on track tonight as cold front crosses the waters just after midnight with an increase in W/NW winds to 15-25 knots and seas building to 4-8 ft.
A cold front will move through overnight with winds shifting to the north behind it. This along with sunny skies should result in afternoon temperatures about 5-10 degrees warmer today than what we saw yesterday, especially across the western half of the CWA. This warmup will be short-lived with another cold front expected early Saturday morning, knocking high temperatures back down into the 40s and 50s.
/issued 258 PM EST Fri Jan 12 2018/ REST OF TODAY AND TONIGHT: A low pressure system is working its way across the SE CONUS with a cold front draped to its south. Southerly wind flow has increased the low level moisture across South Florida allowing scattered showers and a few storms to develop ahead of the approaching cold front. Showers will continue throughout this evening and into tonight before the cold front passes through the area. SHORT TERM /THIS WEEKEND/: After the cold front moves through the region early Saturday morning the winds will shift northerly and cold air advection will move down the peninsula.
Upper level trough will move south of the area this afternoon.
650 PM EST Fri Jan 12 2018 A Cold front is moving through the eastern Tennessee Valley early this evening with strong west to northwest winds affecting KCHA, KTYS and KTRI in the next few hours.