Aikyam-Lab/Synoptic-Bench huggingface dataset:
259 PM CDT Mon Apr 24 2017 High pressure will keep conditions tranquil for another night, under mostly clear skies. The south winds will bring warmer air to the region, along with a warm surge at 850mb. That will keep overnight lows about 10 degrees warmer than last night, with lows bottoming out in the lower 50s. On Tuesday, low pressure advancing eastward across Oklahoma will be associated with a frontal boundary extending north into the western Great Lakes region. Showers and a few storms will be possible late Tuesday night in response to low pressure lifting NE from the southern Plains toward eastern Iowa.
Moisture will slowly infiltrate the lower levels and rainfall will become more widespread overnight into Tuesday morning. However, the tilt of the trough which the upper low is associated with is a little fuzzy.
/EC/ Cold advection stratus is lingering in the cyclonic flow over northeast portions of the forecast area and this is keeping things a bit cooler. Otherwise, the forecast is in good shape with weak high pressure building over the ArkLaMiss. /EC/ Prior discussion below: The high pressure center will sit near the forecast area tonight.
Low level southerly flow will increase to 25-30 knots tonight in response to a developing area of low pressure over the central plains.
120 PM EDT Mon Apr 24 2017 A dry cold front continues to push across the North Country this morning, bringing a northerly wind shift and slightly cooler temperatures.
323 PM CDT Mon Apr 24 2017 Considerable cloud cover has kept temperatures significantly cooler across Northeast Mississippi and near the Tennessee River in West Tennessee today.
A warm front brings a rain sheild with the triple point looking to be off the coast of southern Washington state.
Further north across north-central KY and southern Indiana, highs in the upper 60s to the lower 70s will be common. In addition, the low-level cloud cover has also been eroding nicely with just the Lake Cumberland region seeing most of the cloudiness this morning. Weak ridging will keep the short term dry other than perhaps a stray sprinkle or two in the Lake Cumberland region early this morning. Sunnier locations, such as from southern Indiana into north central Kentucky, should see temperatures rise into the lower 70s today. With the weak ridging moving in, the surface pressure gradient will be more relaxed resulting in lower wind speeds and less gustiness today compared to the past couple of days.
Healthy thunderstorm pops Tuesday night continue, with northern sections being most favored as sharp 700 mb trof moving into the area is accompanied by higher theta-e air.
A low pressure system over the area will continue moving east and will be followed by high pressure aloft. Another low pressure system will bring more precipitation and locally breezy conditions to the area Tuesday afternoon and night.
At the surface, a low pressure trough had moved out into central and southwest Kansas today. A cold front will drop south across southwest and central Kansas behind the low and will be moving through the Medicine Lodge area by mid afternoon.
256 PM EDT Mon Apr 24 2017 High pressure will push across the north tonight as a weak front dissipates along the coast.
Forecast confidence is high: Clouds will increase tonight into Tuesday as high pressure departs and low pressure approaches. Models are suggesting some fog near lake Michigan later tonight into Tue morning, but not biting on this for now given how dry the low levels are. Filtered sunshine through mid and high level clouds should bring another pleasant day Tuesday, with highs in the low 70s except for cooler once again near Lake Michigan.
Moisture will slowly infiltrate the lower levels and rainfall will become more widespread overnight into Tuesday morning. However, the tilt of the trough which the upper low is associated with is a little fuzzy. The upper low is progged to take a right turn as or even before it gets to our latitude.
An upper low is located across GA with wrap around moisture and clouds blanketing the Tri-State region. A closed upper level low will move through Georgia today. The surface cold front and associated deep moisture has pushed east of the area and will affect the Carolinas today. High temperatures are expected to be mainly in the lower to middle 70s.
317 PM CDT Mon Apr 24 2017 Beautiful weather on tap for tonight and Tuesday with cooler and drier air firmly in place.
243 PM EDT Mon Apr 24 2017 Low pressure tracking along the East Coast should result in periodic rain chances mainly east of I 79 early in the week. Dry and warm weather is expected with mid week high pressure. Rain chances will ramp back up this afternoon across the Ridges as mid-level dry air evacuates and moisture begins to advect back in from the Mid- Atlantic. Away from the high terrain, a lack of organized ascent will necessitate only slight rain chances through the night. The upper low will track along the coast Tuesday, keeping us on along the northwestern periphery of the system. Rain chances will remain best confined to the higher elevations, but a weak area of deformation could spill rain west, closer to Pittsburgh during the day Tuesday.
1239 PM CDT Mon Apr 24 2017 Ridge axis extending from west central Illinois through central into southwest Missouri will drift eastward today. Wind will turn to the south-southeast after the ridge axis passes and Warm advection will allow temperatures to rise above yesterday's highs. This looks reasonable given the warm April sunshine and yesterday's temperatures in the low to mid 70s so stuck pretty close to warm MAV guidance today. Overnight lows MOS guidance lows in the upper 40s to low 50s look reasonable with slightly warmer temperatures in the urban areas of St.
340 PM CDT Mon Apr 24 2017 Upper low now positioned over Ga but mostly cloudy skies still prevail.
217 PM EDT Mon Apr 24 2017 A few wraparound showers from the low over coastal South Carolina may move into portions of southeast Georgia near the Altamaha River this afternoon, and a few light showers are possible across Flagler County. An upper low over south Georgia today will slide northeast along the coast of the Carolinas through Tuesday, providing deep westerly flow across the region. Highs on Tuesday will rebound into the low to mid 80s.
The high res models are in good agreement that an isolated showers will be possible over the Sierra from Fresno county northward through the early evening hours.
321 PM EDT Mon Apr 24 2017 High pressure will be in control across the area through tonight.
High pressure overhead today is drifting E with return SE flow already in E TX, but still N in LA on surface. Outlook is for midweek convection as cold front moves through our area briefly overnight Wed.
521 PM EDT Mon Apr 24 2017 Low pressure tracking along the East Coast should result in periodic rain chances mainly east of I-79 early in the week. Dry and warm weather is expected with mid-week high pressure. Rain chances will ramp back up this afternoon across the Ridges as mid-level dry air evacuates and moisture begins to advect back in from the Mid- Atlantic. Away from the high terrain, a lack of organized ascent will necessitate only slight rain chances through the night. The upper low will track along the coast Tuesday, keeping us on along the northwestern periphery of the system. Rain chances will remain best confined to the higher elevations, but a weak area of deformation could spill rain west, closer to Pittsburgh during the day Tuesday.
A dryline will move into portions of western Oklahoma and western north Texas during the early part of the day tomorrow, with winds shifting to the west and southwest and much warmer temperatures found behind it.
135 PM EDT Mon Apr 24 2017 Aviation/Hydro An area of high pressure will build into Ontario today. A low pressure system will attempt to move in from the west on Tuesday.
Low clouds and local MVFR conditions over the TAF sites will slow lift allow for improving conditions this afternoon as high pressure begins to build into the Southern Appalachian Region.
As an upper low slowly tracks northeast across the Carolinas tonight. high pressure building in will provide a quiet night with dry conditions. Improved conditions are expected on Tuesday with the high pressure in control for a dry day with decreasing clouds and warmer temperatures.
640 PM EST Wed Jan 17 2018 In the wake of a strong upper level disturbance and associated arctic cold front, a moderating arctic high pressure over the Southern US will gradually build east into the area through Thursday night.
724 PM EST Wed Jan 17 2018 Upper air pattern consists of a deep 500 mb trough over the ern U.
637 PM EST Wed Jan 17 2018 High pressure centered over the Plains will build into the Tennessee Valley this evening. Southwest flow around this high will result in a gradual warming trend through the work week. This high will provide dry weather and moderating temperatures.
827 PM EST Wed Jan 17 2018 High pressure will build into the region through Thursday, bringing fair skies but cold temperatures.
Anticipate freezing temperatures over all of the CWA tonight/Thursday morning based on SREF ensemble mean temperatures/ deterministic NAM temperatures. Based on the timing of the foregoing upper system and NAM deterministic soundings at select locations, do not anticipate significant precipitation until around 12z Thursday, and then only over the SERN CWA, when the unsatured layer decreases from the lowest 5000ft to the lowest 2000 ft. Warmer conditions Thursday afternoon with highs in the lower to mid 40s. The development of a coastal trough Thursday/Thursday night will increase the chance for precipitation over the MSA Thursday and over the MSA/ERN CWA Thursday night.
/issued 200 PM EST Wed Jan 17 2018/ Cold dry high pressure over the southern MS valley will drift east along the gulf coast states through Thursday night.
Patchy fog remains possible for sheltered locations tonight, ahead of the approaching cold front.
505 PM CST Wed Jan 17 2018 At 2 PM, a tight southwest surface pressure gradient was bringing slightly warmer air into the region from the Central Plains. For tonight, a short wave ridge will build across the region. With 925 mb temperatures around 3C warmer than this afternoon, the high temperatures should easily climb into the lower and mid-30s on Thursday afternoon. This should allow the low water snow content to compress even more.
But, winds continue to accelerate from north, with cooler air immediately upstream. Temperatures will continue to drop into the 50s over the next few hours with strengthening northerly winds as a cold front pulls through.
Tonights forecast challenge will be the chance for freezing rain/drizzle changing over to light snow between midnight and 6am along and north of highway 2. Roads may be slippery in spots tomorrow morning as a result of the freezing precipitation.
Think there will be a light rain/freezing rain mix coming in, changing to snow as upper temperatures drop. Tonights forecast challenge will be the chance for freezing rain/drizzle changing over to light snow between midnight and 6am along and north of highway 2. Roads may be slippery in spots tomorrow morning as a result of the freezing precipitation.
349 PM MST Wed Jan 17 2018 Not much to speak of today, weather-wise, as the remnants of a weak upper level trough exit our area and transitory high pressure builds in.
928 PM EST Wed Jan 17 2018 High pressure centered over the Plains will build into the Tennessee Valley this evening. Southwest flow around this high will result in a gradual warming trend through the work week. This high will provide dry weather and moderating temperatures.
Strong high pressure over the region will maintain clear skies and light winds. Winds will remain light as the high will be centered over the lower MS Valley.
600 PM CST Wed Jan 17 2018 With high pressure drifting into the lower Mississippi Valley, winds have started to turn southwest across central Illinois. The warming trend should begin in earnest on Thursday, as temperatures reach above freezing over the CWA. Upper ridging will build eastward through the end of the week, with the warming trend continuing.
Clearing and cooler conditions are expected after midnight. Dry high pressure will maintain fair weather Thursday into the weekend, with moderating temperatures this weekend.
/issued 323 PM EST Wed Jan 17 2018/ Short Term (Tonight): Cold front progressing quickly southward through the Florida Peninsula this afternoon. The low temperature forecast for tonight was lowered by an additional degree from our previous forecast, based on the latest guidance.
Another cold night/morning is in store with the sub-freezing temperatures already observed across the area expected to bottom out in the lower/mid teens north and upper teens/lower 20s south. Nixed the low water advisory a little early with tidal readings above advisory criteria, having just passed the time of predicted astronomical high tide. Strong high pressure over the region will maintain clear skies and light winds. Winds will remain light as the high will be centered over the lower MS Valley.
536 PM CST Wed Jan 17 2018 Gusty west-southwest winds have produced minor visibility restrictions and slick spots on area roadways with temperatures remaining well below freezing. Breezy conditions will continue overnight owing to the tight pressure gradient, as southern Wisconsin remains between low pressure over southern Canada and strong high pressure located over the southern Mississippi valley. With elevated mixing in the surface layer, low temperatures should be several degrees warmer than were observed last night. Expect temps to warm to the lower 30s, tempered by the fresh widespread snow field.
425 PM MST Wed Jan 17 2018 Not much to speak of today, weather-wise, as the remnants of a weak upper level trough exit our area and transitory high pressure builds in.
956 PM CST Wed Jan 17 2018 The center of a cold high pressure is basically directly overhead. Most locations will still fall into the lower to middle teens, and some single digit readings are likely in the more outlying and rural areas. /issued 400 PM CST Wed Jan 17 2018/ Despite full sunshine today, temperatures have struggled to reach the freezing mark in many locations due to much of the snowpack left over from yesterday. With southerly winds returning, daytime highs on Thursday will rebound into the lower end of the 40s while overnight lows fall back into the 20s over much of the area.
/issued 400 PM CST Wed Jan 17 2018/ Despite full sunshine today, temperatures have struggled to reach the freezing mark in many locations due to much of the snowpack left over from yesterday. With southerly winds returning, daytime highs on Thursday will rebound into the lower end of the 40s while overnight lows fall back into the 20s over much of the area.
An upper level ridge of high pressure over the region today will slowly move eastward tonight as a Pacific cold front approaches the region.
Temperatures will hopefully climb back above freezing tomorrow for many locations. Chattanooga Airport, TN 10 38 20 48 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 7 35 17 46 / 0 0 0 0 Oak Ridge, TN 6 35 17 47 / 0 0 0 0 Tri Cities Airport, TN 5 34 15 47 / 0 0 0 0 NC.
After rather balmy high temperatures this afternoon mostly in the 70s, temperatures have fallen rapidly early this evening behind the strong cold front.
Winds will remain light as the high will be centered over the lower MS Valley.
504 PM CST Wed Jan 17 2018 High pressure will drop south through this TAF period.
916 PM EST Wed Jan 17 2018 High pressure will build into the region through Thursday, bringing fair skies but cold temperatures.
By the weekend high temperatures will be in the lower to middle 40s. A ridge of high pressure is building into the region from the Ohio Valley. After mid-morning Thursday the low level flow veers more westerly (275-285) and this will bring a better chance of snow showers to Oneida County, with some scattered flurries possible further south across the Syracuse metro area and even the northern Finger Lakes/Susquehanna region. High temperatures on Thursday will be seasonably cool, in the lower to mid-20s, except around 30 in the Wyoming Valley of Northeast Pennsylvania. 330 PM Update Surface ridging overnight will lead to mainly clear skies and cold conditions. On Thursday a brief flat upper level ridge will reside over the region as the next short wave moves through the central Great Lakes.
Cold and dry air continues to funnel into the area in the wake of a strong cold front. Temps are already below freezing across much of inland Se Ga and will continue to fall steadily overnite from strong cold air advection. However still going with a hard freeze most areas with lows mostly in the lower to mid 20s.
Scattered to broken mid and upper level clouds will clear by late Thursday morning, as an upper trough moves across the region.
502 PM EST Wed Jan 17 2018 A deep trough, currently aligned along the Appalachians will shift east through the short term, with heights recovering across the Ohio and Tennessee Valleys.
902 AM PDT Mon Jul 24 2017 A dry cold front will keep windy conditions across the Cascades and into the Columbia Basin.
Synoptic Setup: A hot high pressure ridge has formed over the western half of the CONUS. A ridge spur runs out of this from southeastern Montana through North Dakota and into Manitoba. An open trough over Alberta is rapidly closing off as the surface and has latched onto the lee side mountain trough over the frontrange moving it forward. Behind this a new ridge is forming over British Columbia. Farther west another closed low is forming over the Gulf of Alaska. Today into tonight: as the lee side trough gets dragged along the upper level trough it will quickly form into a dry cold front this morning. Tuesday: Front will move back to the north as a very diffuse and dry warm front which should stabilize the atmosphere and lead to a dry day with partly cloudy to clear skies.
645 AM CDT Mon Jul 24 2017 A cold front will continue across central Arkansas today. Today Through Tuesday Night The area of high pressure aloft will continue west of Arkansas today. However, this high begins moving back to the east tonight. Then on Tuesday, the high will continue to build over Arkansas. With the cold front over central Arkansas today, shower and thunderstorm chances will again be pretty good. Not expecting rainfall Tuesday night as subsidence will be increasing under the high. Temperatures today will be in the lower to mid 90s.
Large scale ridge remains in place across the southwest US, with mean flow shifted further north and northeast from our CWA. Today-Tonight: Lee trough begins to deepen today and southerly flow will bring both breezy conditions and WAA. Temperatures should be similar to Sun if not a little warmer and I made a slight upward adjustment to account for increase in WAA.
746 AM EDT Mon Jul 24 2017 Aviation Northerly winds on the back side of departing low pressure will usher in cooler and less humid weather today, although considerable cloudiness is likely especially east of Grand Rapids.
917 AM EDT Mon Jul 24 2017 A cold front will approach the area today before passing through tonight.
Chattanooga Airport, TN 92 74 91 73 / 30 20 30 10 Knoxville McGhee Tyson Airport, TN 91 72 90 70 / 20 10 20 10 Oak Ridge, TN 92 72 90 70 / 20 10 20 10 Tri Cities Airport, TN 91 66 88 64 / 20 10 10 10.
611 AM CDT Mon Jul 24 2017 A relatively cooler and noticeably drier air mass is moving into the region currently, setting the stage for a relatively pleasant start to the work week. By Tuesday, the upper ridge expands back east and low level flow will turn back to a southerly direction. So as highs climb back into the low to mid 90s and dewpoints climb into the lower 70s, heat indices will climb back to around 100.
/issued 353 AM CDT Mon Jul 24 2017/ SHORT TERM (Now through Tuesday): South Texas remains caught between the H5 ridge dominating the Four Corners region and the trough stretching across the western Gulf. Moisture will begin to increase overnight as an inverted trough draws moisture northward.
07Z water vapor imagery shows an upper ridge over the southwestern U. At the surface, a modest ridge of high pressure was centered over the upper Midwest with the ridge axis extending through the mid MO river valley and into north central KS. For today and tonight, models keep all of the dynamics to the north while surface ridging gradually moves east across the central plains. Dewpoints should be a little cooler with the ridge passing, so there should be more of a break from the afternoon heat indices. Low level southerly flow becomes established Tuesday for a warmer day than today. The 00Z NAM is the fast and strong outlier of the operational guidance and nearly every GFS Ensemble member with the upper trough and subsequent timing of the associated cold front passing through the area.
Today-tonight: Relatively quiet weather with high pressure slowly drifting east. Upper support is limited virtually non-existent with area near 300MB ridge axis so left forecast dry, but would not be shocked by a rogue elevated storm.
600 AM MDT Mon Jul 24 2017 Large scale ridge remains in place across the southwest US, with mean flow shifted further north and northeast from our CWA. Today-Tonight: Lee trough begins to deepen today and southerly flow will bring both breezy conditions and WAA. Temperatures should be similar to Sun if not a little warmer and I made a slight upward adjustment to account for increase in WAA.
603 AM CDT Mon Jul 24 2017 Early morning satellite imagery together with surface obs and RAP13 analysis showed an area of high pressure centered over Lake Superior, with light clockwise flow in place across the Upper Midwest. Meanwhile expect today to be mostly sunny and slightly warmer than yesterday with southeasterly winds. Scattered to broken mid level clouds may persist for much of the day east of the EML poking into west central MN, and a dry airmass from the continental high pressure ridge over the Great Lakes will keep temperatures mild east of I-35.
Upper level low off the coast of Northern California will continue to transport moisture northward into the region. Upper level low off the northern California Coast is bringing southerly flow over the region today with a significant increase in moisture.
High pressure has shifted east of the forecast area this morning in response to a trough approaching the California coast. Otherwise, think showers and thunderstorms will be initially focused over the higher terrain, with enough flow to allow this convection to drift into valley locations.
1028 AM EDT Mon Jul 24 2017 A cold front will move through the region today.
426 AM PDT Mon Jul 24 2017 A dry cold front will keep windy conditions across the Cascades and into the Columbia Basin.
940 AM CDT Mon Jul 24 2017 There was some patchy fog this morning, mainly confined to the low lying areas/valleys.
Updated grids to reflect this trend with high pops north of the highway 190 corridor through noon time, then tapering them off during the afternoon, with isolated to scattered pops further south along the I-10 corridor for the afternoon. A pattern change is expected through mid week as a mid to upper level ridge will build in from the west. High pressure will remain over the northern gulf with low seas and light onshore winds expected.
811 AM EDT Mon Jul 24 2017 An upper trough, located over the Great Lakes early this morning, will push slowly across Pennsylvania early this week. In its wake, high pressure will build southeast across the region by midweek.
a broad area of low pressure was noted across the Mid Atlantic/southern New England. with two center areas of low pressure across NJ and Lake Ontario. A trough extends from the NJ low into north Georgia. while the Lake Ontario low features a weak cold front extending through southern OH and SW into AR. models are already too far south with the drier air behind the weak cold front.
1000 AM EDT Mon Jul 24 2017 A weak cold front across the Ohio Valley will slide southeast toward the region this afternoon before slipping south into the Carolinas late tonight and early Tuesday.