Aikyam-Lab/Synoptic-Bench huggingface dataset:
651 AM CDT SAT SEP 17 2016 Low pressure over the Northland this morning will move east northeast today with brief ridging moving in behind. Coverage this afternoon will be lower than this morning and most of the high resolution models indicate coverage and intensity of the precipitation will diminish after 12Z. More clouds than sun will occur for much of the day as cooler air aloft and cyclonic flow will not be supportive of widespread clearing. As high pressure moves through the Northland tonight, it will bring an end to any linger showers and cause skies to clear. After overnight lows in the forties, highs will rebound into the lower to mid seventies on Sunday. A cold front will move through the forecast area Sunday night, while an upper level short wave trof clips northern Minnesota.
Showers and thunderstorms out west associated with the approaching trough have begun to cross the MS River early this morning. As for the cold front, it looks like it will start moving through the mid state Sunday morning, and be completely through the area by Sunday evening.
WAA will them get underway later in the day Sunday allowing highs to warm into the lower 80s.
Temperatures will cool down just a little behind the cold front to near seasonal readings.
1021 AM EDT Sat Sep 17 2016 Periodic showers and thunderstorms are expected until passage of a cold front on Sunday night.
Temperatures today and Sunday afternoons will warm into the low 80s, under a mix of sun and clouds. Therefore we will keep pops on the low side through the weekend.
Lowered highs just a tad, mainly up north, as observations have been consistently running 2-3 degrees cooler than what our hourly forecasts were indicating for northern locales.
1250 PM EDT SAT SEP 17 2016 High pressure will extend southwestward across the Carolinas through tonight.
Had already inserted patchy fog earlier this morning over central SD where skies are clear and winds are light under the ridge axis. Will see warmer air aloft spreading over the region today through Sunday, with temps becoming well above normal.
Rua The low level inverted trough and mid level weakness will meander slowly east across the forecast area today as it begins to feel the developing westerlies ahead of the northern stream trough. However, lift from northern stream upper level trough combined with residual moisture and daytime heating should be enough for at least scattered showers and storms.
The above noted system in part consisted of a cold front extending from just north of the Ohio Valley, draped SW across Texas and southern New Mexico. Stayed with a trend - bringing the higher rain chances to our western areas, spreading them eastward during the course of the day. Instabilities also will increase suggestive for convection; but shear values remain on the low side, which should keep overall storm strength for the most part limited. Clearing skies and dry weather returns to start a new work week, as broad high pressure builds in from the west. As has been the case recently, only a slight cool down is expected with this high pressure.
646 AM CDT Sat Sep 17 2016 Last vestiges of the upper low will traverse the region today, spreading clouds overhead and bringing some instability showers to areas along and north of I-94. Showers are anticipated to develop again, with the highest likelihood over northern WI. During the evening, anticipate the clouds and showers to fizzle away, leaving mainly clear skies as high pressure builds in. High pressure begins to shift east on Sunday allowing for some return flow. Warm advection will lead to slightly warmer temperatures, but some of that may also manifest as cloudiness.
110 PM EST Thu Dec 15 2016 Cold high pressure will settle over the region tonight and Friday bringing well below normal temperatures. Moisture will increase Friday night into the weekend as a warm front develops and lifts northward bringing increased chances of precipitation.
Freezing Drizzle Possible Friday Morning. Strong warm air advection, low-level moisture, and a tight pressure gradient will move into the area overnight ahead of the low.
However, WAA will begin increasing markedly by Friday morning in response to a large, deepening trough across the western CONUS.
238 PM CST Thu Dec 15 2016 Cold and mostly cloudy conditions continue across the region this afternoon, as Canadian high pressure slowly moves east into the lower Ohio River Valley. Winds will begin to increase this evening as that high moves further to the east and low pressure starts to deepen across the eastern plains of Colorado. Temperatures tonight will be several degrees warmer compared to this morning, especially over southeastern Kansas and far western Missouri, where readings will likely only fall to around 30 degrees. In addition to the (relatively) warmer temperatures and increasing southerly winds, moisture will slowly increase as well overnight into Friday morning. The good news is that at this juncture, it looks like temperatures will be above freezing on Friday morning before any precipitation starts to fall.
Surface ridging will continue to build into the area overnight. Ridging moves east of the area Friday with warmer temperatures.
Upper air analysis this morning showed a low amplitude ridge over the western half of the country with north-northwesterly flow over Texas. The upper level ridge will move across Texas tonight and then off to the east. A trough will swing through the Pacific Northwest into the central Rockies.
High pressure is forecast to briefly build Thursday night and lower inversion heights via subsidence, hence diminishing snow shower potential across the area. Warm advection is projected to intensify late Friday ahead of a digging trough over the Upper Midwest, which will cause snow chances to increase as the warm front extends across the Upper Ohio Valley.
215 PM EST Thu Dec 15 2016 An arctic cold front will surge east toward the Carolina coast this afternoon. Arctic high pressure will build into the region from the NW tonight and Friday. Strong cold advection in the wake of the arctic cold front progressing through central NC this morning will result in mostly clear skies and a brisk NW wind sustained at 15-25 mph with gusts in the 25-35 mph range early/mid afternoon (particularly along/east of Hwy 1). With a brisk NW wind, expect wind chill readings ranging from the upper teens in the far NW Piedmont to the lower/mid 20s elsewhere by mid/late afternoon. With Canadian high pressure building over the Mid-Atlantic/Carolinas overnight, expect chilly overnight lows in the upper teens to lower 20s, coldest in the N/NW Piedmont where the MSLP gradient will slacken the earliest.
1000 AM MST Thu Dec 15 2016 Made minor adjustments to Friday forecast based on high range guidance and latest 12Z guidance to remove freezing drizzle mention, add patchy freezing fog (in the morning), and increase sky cover. Based on shallow saturated layer (and supported by a consensus of hi res members) freezing fog appears more likely Fri morning in our east, with stratus during the day. Only the higher terrain areas of eastern Colorado will see a slight warmup where temperatures may reach the 40s, but expecting 30s for highs elsewhere. Forecast point soundings indicate it might be deep enough for a little light freezing drizzle to develop.
100 PM CDT Mon Apr 25 2022 Updated for 18Z aviation discussion 18Z TAF discussion: A cold front will push southeast across the area through tonight. A cold front is pushing into the lower MS Valley region as of late morning, and it is preceded by weak convective system with a large cold pool driving a band of showers with gusty winds, now roughly approaching the Natchez Trace Corridor. Lows will range from the mid 50s in the north to the low 60s in the south.
A secondary moisture and wind surge is expected this evening through overnight as an approaching trough makes its way into the eastern seaboard and jostles the aforementioned ridge into the central Atlantic.
1134 AM CDT Mon Apr 25 2022 Key messages: - Freezing temperatures are expected tonight along and north of Highway 36 with a frost expected further south as temperatures fall into the upper 20s to mid 30s.
(The rest of today ) Cool high pressure settling in across the forecast area in the wake of the slow moving frontal boundary that is now south of the area.
Dry and breezy with warmer than average temperatures into the weekend with the afternoon temperatures peaking Tuesday. Then the flow quickly becomes southwesterly again thanks to an approaching upper level trough.
311 PM CDT Mon Apr 25 2022 Following the cold front passage, northwest winds are bringing cooler and drier air for the next 48 hours or so. Lows will be in the lower to mid 40s for most areas. Conditions will be ideal for radiational cooling, which normally favors the cooler mos guidance over nbm guidance.
Temperatures generally in line with forecasted highs with progression of cold front west to east across mid state through afternoon hours today resulting in several locations west of I-65 Corridor likely having already reached expected forecasted high temperatures with temperatures in these locations falling as remaining morning into afternoon hours progress. A band of showers currently impacting BNA and MQY will continue to move slowly east ahead of a cold front this afternoon.
Overnight lows will reach the low/mid 50s as winds 5-10kts become northerly behind the frontal passage.
The clouds will move off the higher terrain this afternoon. A weak upper level trough will move across the area this morning, with some lingering snow, mainly south of I-70, over the higher terrain and in the srn Foothills. Upper ridging is in place over the CWA on Tuesday and Tuesday night.
The cold front is well to the south, with ongoing convection in the lower Trans Pecos. Otherwise, WV imagery shows dry air moving into West Texas and Southeast New Mexico as an upper ridge builds in from the west.
207 PM EDT Mon Apr 25 2022 Synoptic situation will begin changing tonight as high pressure begins sliding away from the region and clouds begin increasing ahead of a cold front. A cold front will bring scattered showers and thunderstorms to the Southeast Tuesday afternoon into Tuesday night.
1157 AM MDT Mon Apr 25 2022 A transient ridge will be over the region today, warming temperatures back to seasonal normals.
1107 AM MDT Mon Apr 25 2022 Most recent water vapor and upper air models show closed upper low just north of the great lakes, upper ridge over the rockies, with northeast flow aloft our region. As we progress through the next few days, upper ridge slides over the northern plains, bringing return flow, and a warming trend.
1213 PM CDT Mon Apr 25 2022 Key Messages: - Raw, still blustery today with highs near record low maximums - Cool into midweek with mostly small precip chances - Potent weekend system likely brings widespread rain Today into Tuesday: Active pattern continues aloft with longwave troughing still parked over central Canada and the Upper Midwest.
At the surface, high pressure extends from Western SD through Western KS. Another night of below normal temps are expected tonight with readings ranging from the low 30s over central KS to the mid 30s over southern portions of the forecast area. Weak upper ridging will move from the Rockies into the High Plains for Tue allowing for plenty of sun and seasonal temps. There is fairly decent model consensus in elevated storms developing Wed night, especially over eastern KS, as the low level jet veers, setting-up an impressive moisture transport signal.
Additionally, a secondary cold front and windshift will release through the cwa this evening. This deeper mixing will also aid in drying out the lower part of the column favoring clearing. Large wavelength upper level low pressure system will propagate through the central Great Lakes region on Tuesday.
938 PM EDT Mon Apr 25 2022 A cold front will move east of the area this evening. Cold front has moved through, bringing cooler air on a decreasing northwest flow. This will bring cooler air aloft. Meanwhile high pressure will be gradually building in at the surface.
607 PM MDT Mon Apr 25 2022 Weak upper level trough embedded in the northwest flow aloft will continue to slide off to the east through the rest of the day. Dry sub-cloud layer east of the higher terrain will this area rain free. Ridge off to the west will move over Colorado tonight and Tuesday. With the ridge moving over Colorado, temperatures will warmup into the 70s for northeast Colorado.
/NF/ Through Tuesday: A convectively induced cold pool and associated thundershower activity continue to progress southeast across the forecast area with the primary synoptic scale cold front lagging behind just a bit. Otherwise the main story will be significantly cooler weather as continental polar air surges southward through MS Valley region.
306 PM MDT Mon Apr 25 2022 Weak upper level trough embedded in the northwest flow aloft will continue to slide off to the east through the rest of the day. Dry sub-cloud layer east of the higher terrain will this area rain free. Ridge off to the west will move over Colorado tonight and Tuesday. With the ridge moving over Colorado, temperatures will warmup into the 70s for northeast Colorado.
Dry and cooler conditions will continue through midweek. /issued 352 PM CDT Mon Apr 25 2022/ A cold front is pushing through the Mid South this afternoon. You can already feel the cooler and drier conditions outside this afternoon.
420 PM MDT Mon Apr 25 2022 High pressure will result in a steady warming trend to start the work week.
813 PM EDT Mon Apr 25 2022 Another warm and dry day comes to a close with high pressure remaining in control. High pressure remains in control, with easterly winds shifting to onshore in the afternoon with the sea breeze.
More showers will develop in SE Oregon overnight along and ahead of a cold front.
Widely scattered showers persist behind a cold front that is moving over the gulf.
700 PM EDT Mon Apr 25 2022 A cold front will bring rain showers and storms this afternoon and evening. So far, clouds are not developing tall enough to support severe hail growth in below freezing temperatures due to rater persistent warm air aloft. Given that current conditions are the most favorable under the highest SB CAPE, severe development is likely to be limited through the rest of the day. Tuesday should be noticeably cooler (back to below normal) and dry in the wake of the front.
906 PM EDT Mon Apr 25 2022 A stationary front will remain near the region through early Tuesday before being swept away by a cold front crossing the area.
756 PM EDT Mon Apr 25 2022 Synoptic situation will begin changing tonight as high pressure slides away from the region and clouds begin increasing ahead of a cold front. The cold front will bring scattered showers and thunderstorms to the Southeast Tuesday afternoon into Tuesday night.
Regional radar imagery shows showers are still hung up along the plateau late this evening, just ahead of the surface cold front which is now between Nashville and Cookeville. Some showers may push east into the TN valley through the first half of the night, but better coverage is expected later tonight as cold front pushes into the region from the west. CD Chattanooga Airport, TN 57 70 45 72 47 / 60 30 0 0 0 Knoxville McGhee Tyson Airport, TN 56 67 41 69 44 / 80 80 0 0 0 Oak Ridge, TN 55 67 41 69 44 / 70 50 0 0 0 Tri Cities Airport, TN 56 65 38 65 38 / 70 70 0 0 0.
343 PM MDT Mon Apr 25 2022 A transient ridge will be over the region today, warming temperatures back to seasonal normals.
740 PM EDT Mon Apr 25 2022 A cold front will move east of the area this evening. Cold front has moved into far western Ohio. This will bring cooler air aloft. Meanwhile high pressure will be gradually building in at the surface.
Low temperatures will be about 10 to 15 degrees colder than last night with values ranging from the low to middle 20s in north-central and central WI, to the upper 20s to low 30s in far northeast and east-central WI. Since the low to mid-level moisture will still be over the region during this time, anticipate scattered showers both rain and snow (more likely graupel) to develop across the northeast 3/4 of the forecast area.
In addition, an approaching upper level trough moving out of the Central Plains is acting to weaken the ridge that has been present across the eastern U. An approaching low to mid level trough currently over the Mississippi River Valley will slide east acting to weaken the ridge that has been anchored along the entire eastern U.
Drier, cooler air will work in overnight as we look to bottom out in the upper 40s to near 50 degrees.
856 PM CDT Mon Apr 25 2022 Adjusted sky cover over the next few hours as the western edge of the low level stratus deck continues to decay. Northwest flow continues as a low pressure clipper aloft moves south from southern Canada into Minnesota tonight, no precipitation expected. Tuesday temperatures will be warmer than Monday, although the temperature spread in the NBM are large. Current forecast highs for Tuesday range from the low 30s in the north to the low 40s where there is snow in the west. Flow aloft slowly turns west during the day, as the ridge axis moves east out of Montana late Tuesday evening.
515 PM EDT Mon Apr 25 2022 A cold front will bring rain showers and storms this afternoon and evening. So far, clouds are not developing tall enough to support severe hail growth in below freezing temperatures due to rater persistent warm air aloft. Given that current conditions are the most favorable under the highest SB CAPE, severe development is likely to be limited through the rest of the day. Tuesday should be noticeably cooler (back to below normal) and dry in the wake of the front.
The cold front has moved into middle Tennessee and Alabama. Cooler, drier air is oozing back across the Midsouth, dew points in the 40s are quickly approaching east Arkansas and the Missouri Bootheel.
Highs will be slightly warmer in the 60s and 70s Tuesday with breezy afternoon winds. Today through Tuesday night A ridge that has been over the area the last few days will continue being pushed off to the east, as a trough will encroach closer to the region later this afternoon and evening. Tuesday, there will be some very light rain and snow showers across the extreme portions of northern Nevada, in the morning, with a a couple tenths of snow across the highest mountain peaks in these areas. Highs will be slightly warmer but still in the 60s to 70s.
631 PM CDT Mon Apr 25 2022 The main concerns in the forecast will be near-critical fire weather conditions today, sub-freezing temperatures overnight, critical fire weather conditions Tuesday, and a few chances for precipitation over second half of the week. Temperatures around the freezing mark will be possible across North Central Kansas and areas south of I-80 in Nebraska.
846 PM EDT Mon Apr 25 2022 A cold front will bring rain showers and storms this evening and overnight. The rest of the evening will feature precipitation chances from a passing trough of low pressure with enhanced frontal ascent. Isolated showers may linger in the ridges into the morning with orographic lifting of saturated, northwest flow. Temperatures will be cooler behind the cold front, although nighttime lows are still expected to be above average with overnight clouds. Tuesday should be noticeably cooler (back to below normal) and dry in the wake of the front.
A cold front will clip northwest California tonight, but only a couple spotty showers or some patchy coastal drizzle is expected for northern portions, followed by clearing skies on Tuesday. Cooler temperatures and breezy afternoons are forecast for midweek.
616 PM CDT Mon Apr 25 2022 A cold Spring night is on tap tonight as frost and freezing conditions develop north of Interstate 70. The cold front has departed to the southeast, leaving gusty W-NW winds at 25-35 mph in its wake. That will set the stage for widespread frost and freezing conditions. One challenge for the freezing temperatures will be the timing of the clouds clearing. 850mb temps will be a couple degrees warmer than Monday night, but still near 0C. Winds will become light and variable Tuesday night under the ridge axis, with clear skies.
Upper level ridge moving over the Northern Rockies today will bring about pleasant conditions, with highs reaching the 60s to near 70, light surface winds, and dry conditions.
Low pressure is finally moving out, but cold air advection and just enough of a pressure gradient will keep winds elevated through the night. There is a chance for showers this afternoon in the far northern parts of the CWA that could be somewhat convective given some CAPE in the low levels given fairly steep lapse rates from the surface to about 800mb before strong capping from 800-700mb.
542 PM MDT Mon Apr 25 2022 A transient ridge will be over the region today, warming temperatures back to seasonal normals.
Dry and cooler westerly low level flow remains effective at maintaining low end VFR ceiling below 5000 ft this evening. Additional reinforcement of cold air arrives with a trough/front from the north late tonight and Tuesday morning which looks increasingly capable of MVFR ceiling in the MBS area prior to sunrise which settles toward PTK during the morning. The trough/front then battles to stay organized against late April daytime surface heating and boundary layer mixing which forces a trend back into broken VFR below 5000 ft for Tuesday afternoon. Additionally, a secondary cold front and windshift will release through the cwa this evening. This deeper mixing will also aid in drying out the lower part of the column favoring clearing. Large wavelength upper level low pressure system will propagate through the central Great Lakes region on Tuesday.
/Issued 324 PM CDT Mon Apr 25 2022/ /Tuesday Night Onward/ After a few unsettled days, a pattern shift will begin taking shape across the region as a high pressure ridge moves across the middle of the country in the coming days.
529 PM MDT Mon Apr 25 2022 An upper level ridge will slide east across the area tonight. A nearly stationary upper level low off the coast of British Columbia will steer a series of upper level troughs across the Pacific NW and northern Rockies over the coming days. Expect breezy and gusty winds Tuesday afternoon in the 25 to 40 mph range and temperatures a good 10 to 12 degrees warmer than today.
Now the lower cloud layer is building just inland away from the coast as a cold front slowly pushing its way into the area. A look at several of the high res models and convective allowing models that show reflectivity continue to show precipitation breaking out east of the Cascade and west of the Cascades from the Umpqua Divide north this afternoon through this evening, and the radar is already showing showers developing in northeast Siskiyou County and moving northeast. Tonight, an upper trough will approach the area and there's pretty good showing the best chance for precipitation to be along and east of the Cascades, and east of the I-5 corridor. Snow levels will gradually lower tonight, but even then any snow accumulations should be confined to the higher passes along the Cascades and eastside.
a broad upper level ridge axis moves over the area during the day ahead of an upper level trough over the northwest portion of the United States. High temperatures are expected to be in the lower to upper 70s under increasing afternoon high clouds. Low temperatures wont be as cold as the previous few nights with readings in the lower 40s to lower 50s.
553 PM CDT Mon Apr 25 2022 Following the cold front passage, northwest winds are bringing cooler and drier air for the next 48 hours or so. Lows will be in the lower to mid 40s for most areas. Conditions will be ideal for radiational cooling, which normally favors the cooler mos guidance over nbm guidance.
558 PM CDT Mon Apr 25 2022 (This evening through Tuesday) Drier air will continue to move in behind the cold front overnight with showers and thunderstorms. After a cool start in the 40s to lower 50s Tuesday morning, most sunny skies will allow temperatures to rise to highs in the lower to mid 70s.