Aikyam-Lab/Synoptic-Bench huggingface dataset:
With cloud cover expected for much of the night, the clouds will help keep temperatures from dropping to freezing and will limit frost development. /issued 252 PM CDT Sun Apr 8 2018/ Skies are mostly cloudy across the forecast area this afternoon with temperatures in the lower 40s to lower 50s. High pressure covers much of the eastern U. High pressure will remain over the region tonight and Monday so dry weather with continue. Monday will see warmer temperatures than today with highs in the upper 50s to mid 60s.
945 PM EDT Sun Apr 8 2018 High pressure extended from central Canada southeast across the Great Lakes and into the Ohio valley. A weak disturbance will move across the lower Ohio valley late tonight and Monday as the high over the region shift northeast.
Otherwise, expect milder and dry conditions Monday with high temperatures getting close to climatic normal in the low to mid 70s.
In the upper levels there is a broad trough over the Central and Eastern U. An associated warm front will be over or near the region late tonight.
Skies clear behind this system and temperatures fall to freezing tonight. Tomorrow looks similar to today temperature-wise with highs reaching into the lower 50s. If there is any precipitation, there is a chance for a mix of snow and sleet at the onset when temperatures are just below freezing. By late morning, temperatures warm above freezing and any precipitation will then transition to rain.
923 PM CDT Sun Apr 8 2018 Have expanded the Winter Weather Advisory for the remainder of the forecast area due to freezing drizzle and accident reports becoming more numerous and impactful, even as traffice volume wanes into the evening. After midnight, still a question of ice introduction on the back edge so could end up a mix of freezing rain/drizzle and light snow. The wind will gradually subside overnight as the area of low pressure moves off to the south of the state.
High pressure builds over the area late tonight with winds becoming light and variable. Low clouds that developed during the late afternoon over Saskatchewan into eastern Montana as the higher clouds diminished, remain over far western ND. Roads will remain slippery through the night as temperatures will remain below freezing, so any wet roads will become slippery. While patchy freezing drizzle is possible southwest with ice loss through this evening and tonight, any impacts will be minimal. For Monday, the 12 UTC global suite is in agreement on cold high pressure and another day of well below normal high temperatures across western and central North Dakota.
Roads will remain slippery through the night as temperatures will remain below freezing, so any wet roads will become slippery. While patchy freezing drizzle is possible southwest with ice loss through this evening and tonight, any impacts will be minimal. For Monday, the 12 UTC global suite is in agreement on cold high pressure and another day of well below normal high temperatures across western and central North Dakota.
Min temps are expected to lower to the low 50s across the northern areas to low 60s across the south. The cold front that pushed through yesterday will try to shift north as a warm front across Deep S TX tonight, but should generally remain stalled just south of our area. Min temps may actually occur late this evening before stratus develops from east to west as moisture advection in the lowest 100mb increases. Chances for scattered showers will peak Monday evening as a mid level s/w trough advects east across the area and as the H85 front finally advances southward along with a reinforcing sfc cold front.
The ridge will make its presence known this week starting tomorrow as the area will see a modest warming trend at least through the middle of the week. Winds have also remained high as the clearing high pressure has yet to push down into the region. The progression will make it difficult for some of the higher totals to be realized, but the intensity of the snowfall rates is sufficient to maintain the forecast roughly as is with a general 2 to 5 total still expected when all is said and done. Following the departure of the current storm system, upper ridging over the western U.
High pressure should settle over the FA on Monday with much lighter winds. On Monday night, high pressure builds southward into the Central Plains yielding a quiet night.
714 PM CDT Sun Apr 8 2018 Winds have generally decreased below advisory levels this evening ahead of a cold front currently moving through the South Plains. /issued 619 PM CDT Sun Apr 8 2018/ A cold front which has already pushed through KPVW and KCDS will move through the KLBB terminal within the next hour or so. As this low sinks southeastward across the South Plains a front will bring an abrupt northerly to easterly wind shift through the late afternoon and evening hours.
710 PM EDT Sun Apr 8 2018 High pressure extended from central Canada southeast across the Great Lakes and into the Ohio valley. A weak disturbance will move across the lower Ohio valley late tonight and Monday as the high over the region shift northeast.
The pattern will change slightly for Monday as a mid-level trough lifts the stalled boundary northward.
An upper level jet moves across the Ohio Valley overnight/Monday morning producing divergence aloft over the Tennessee Valley and increasing the low level winds out of the southwest. Initially, a good deal of virga is expected as it will take a while to saturate the low-levels of the airmass. Temperature profile supports snow across the higher elevations, generally above 3kft. Snow accumulations are expected over the highest terrain, such as High Knob and Smoky and Roane Mountains. Chattanooga Airport, TN 43 62 44 64 / 50 20 10 10 Knoxville McGhee Tyson Airport, TN 40 57 41 61 / 60 30 10 10 Oak Ridge, TN 40 59 40 61 / 60 30 10 10 Tri Cities Airport, TN 36 56 38 58 / 70 50 10 10.
1214 AM EDT Mon Apr 9 2018 Light precipitation chances return for Monday with a trough of low pressure. A warming boundary layer will lead to a mix with and change to rain with time, although the ridges could hold on to snow for much of the day. QPF totals will remain light, with perhaps around an inch of snow accumulation in the ridges, and little elsewhere.
809 PM EDT Sun Apr 8 2018 Chances for light snow and rain return late tonight through Monday night as a weak low pressure system moves through the region. Will defer to eve shift to monitor trends further to see if additional timing/pop changes are needed in this low confidence setup. Slowly increasing heights will start the process of allowing warmer air into the area. Dry conditions will prevail until mid week when low pressure will track across the northern Great Lakes, bring a brief shot of warm air advection precip (mainly rain) to the area.
720 PM EDT Sun Apr 8 2018 Skies have gone mostly cloudy this afternoon with cirrus streaming in from the northwest downstream of weakening low pressure over Nebraska. Temperatures are currently in the low to mid 40s with dewpoints in the low to mid 20s, so expect evaporative cooling to cut down on QPF and cool the boundary layer between 00-03z. Lows tonight will be in the low to mid 30s. With temperatures above freezing for several hours this evening and tonight, roads should just be wet. An upper level trough swinging through Monday night will bring cloudy skies, but no precipitation.
However, a cold front is approaching the area, and will bring MVFR to potentially IFR ceilings into the area later tonight, as well as east/northeast winds. With the cold front through the area, low clouds will likely persist through most of the morning, and part of the afternoon for eastern sites. For tonight, a shallow cold front will south across much of the area by Monday morning. However, temperatures will a little warmer due to an increase in boundary layer moisture. A quiet weather pattern is in store for Monday with cooler temperatures.
Clouds and convection are also approaching from the west and northwest from the next upper trough. Models have a weak upper trough to move across the CWA from 09Z to 15Z Monday morning. Monday's highs will be 2-5 C cooler than this afternoon's.
Rua Cloud cover tonight and some warm air advection above the surface will keep temperatures from dropping too much, so conditions will be warmer than last night, but still on the cool side for April. A short wave from the Plains will continue to move eastward bringing a re-enforcing cold front across the forecast area on late Monday night. Ahead of the front, some dryness in the boundary layer may mix out clouds on Monday, and with a little more sunshine, air temperatures should be warmer and in the 70s.
1147 PM CDT Sun Apr 8 2018 Have expanded the Winter Weather Advisory for the remainder of the forecast area due to freezing drizzle and accident reports becoming more numerous and impactful, even as traffic volume wanes into the evening. After midnight, still a question of ice introduction on the back edge so could end up a mix of freezing rain/drizzle and light snow. The wind will gradually subside overnight as the area of low pressure moves off to the south of the state.
Expecting most of the cloud cover to hang around tomorrow inhibiting daily heating so we will have slightly cooler temperatures on Monday with highs in the mid to upper 50s.
A weak cold front has pushed across all TAF sites switching wind direction to more east northeasterly and wind speeds will slowly decrease through the evening.
1132 PM CDT Mon Apr 9 2018 Another cold front was shifting across southern Missouri this afternoon in response to an approaching upper level disturbance.
The cold front has pushed south into the Red River Valley this evening with cooler temperatures filtering in from the north. could see a bit of fog/freezing fog develop across portions of northeast Oklahoma and northwest Arkansas by Tuesday morning. Further south, temperatures are expected to stay above the freezing mark.
Cold front moving across the area bringing NW winds with it, gusty at times for a few hours behind it. Winds will lighten through the overnight hours and VFR conditions will persist as high pressure builds in at the surface.
650 PM CDT Mon Apr 9 2018 /00Z TAFS/ The low cloud field (with MVFR ceilings) continues to slowly decrease in areal extent, over mainly the Concho Valley and Heartland areas of West Central Texas. Temperatures will drop overnight as skies clear, with readings in the low to mid 40s for most locations. Winds will return to the south, with highs climbing into the low to mid 70s.
709 PM CDT Mon Apr 9 2018 For the 00Z TAFs, winds will become southwest, increase and become gusty by mid to late Tuesday morning at the TAF sites as a surface trof of low pressure strengthens over eastern Colorado and eastern New Mexico.
The RAP and HRRR continue to shrink the snow overnight, but lingering light snow/snow showers will linger into the wee hours until the trough axis moves east. Another cold night is in store with lows ranging from around 20 over the Northern Mountains to around freezing over the Lower Susq Valley.
830 PM PDT Mon Apr 9 2018 Weak high pressure aloft will bring another warm day Tuesday.
1110 PM EDT Mon Apr 9 2018 Some forcing ahead of the upper trough to the west and near a weak boundary could bring in a few isolated showers a bit farther north than expected so brought up low end pops accordingly, though main forecast looks largely on track and previous discussion Baker. Weak high pressure across the Carolinas will weaken as a boundary to the south tries to lift north into far southern GA tonight. Meanwhile, a positively tilted mid level trough will dig south and east tonight through Tuesday. High pressure will continue to build into the region through Tuesday night.
This will have an impact on the amount of frost development, but will leave the advisory in place with temperatures and dewpoints both near the freezing mark.
/issued 335 PM CDT Mon Apr 9 2018/ Temperatures have warmed into the upper 50s to middle 60s across the Midsouth Generally 8-13 degrees warmer than yesterday, but still below normal.
Lgt north winds may not diminish completely as a weak cold front hovers north of I-30.
902 PM CDT Mon Apr 9 2018 High clouds continue to stream into the Mid-South this evening ahead of a weak cold front. /issued 335 PM CDT Mon Apr 9 2018/ Temperatures have warmed into the upper 50s to middle 60s across the Midsouth Generally 8-13 degrees warmer than yesterday, but still below normal.
528 PM MDT Mon Apr 9 2018 UPDATED AVIATION An upper level ridge of high pressure will reside over the region through Tuesday morning. On Tuesday afternoon, an upper level disturbance will approach from the west, bringing with it a chance for rain showers and cooler temperatures.
Temperatures are hanging right around freezing and some snow is starting to stick on the grass, but so far roads are just wet. Latest HRRR and SPC HREF appear to focus the best (albeit light) snowfall across the higher terrain near and just to the north of Interstate 80 late tonight. Min temps will be right around freezing in the SE with some clearing is possible tonight after the main short wave trough passes.
1043 PM EDT Mon Apr 9 2018 Under clear skies and light southeast winds, temperatures are holding in the upper 70s with uncomfortable dewpoint readings in the lower 70s along the island chain. Surface wise, a nebulous ridge axis is spread across extreme south Florida and the Florida keys, resulting in east to southeast winds of less than 10 knots on our marine district. A deep layered(925-500 mb) ridge will remain aligned across the outer Florida Straits and the archipelago of Cuba resulting in large scale subsidence and limited moisture, hence, nickle to generous dime pops seem fine.
Band of east west oriented showers and thunderstorms along stalled warm front have moved little over the course of the evening. By mid to late morning, confidence is medium that bases could creep up above IFR, but will likely A warm front will stall across the waters tonight and a wave of low pressure will move along the front over the waters Tuesday.
913 PM MDT Mon Apr 9 2018 Satellite imagery shows an upper ridge axis over the Inter- Mountain West, and northwest flow aloft over MT. Otherwise, high pressure will keep conditions quiet tonight. Tonight through Tuesday afternoon, a warm ridge of high pressure will be in control over our region. This will finally allow daily high temperatures to climb above freezing and provide some substantial melting of the snowpack.
/issued 902 PM CDT Mon Apr 9 2018/ High clouds continue to stream into the Mid-South this evening ahead of a weak cold front. /issued 335 PM CDT Mon Apr 9 2018/ Temperatures have warmed into the upper 50s to middle 60s across the Midsouth Generally 8-13 degrees warmer than yesterday, but still below normal.
532 PM MDT Mon Apr 9 2018 The upper level ridge axis will enter the Great Basin later this afternoon and evening northwesterly flow aloft over the central Rockies will decrease as a more stable and dry airmass moves into place. Expect a 7 to 10 degree increase in high temperatures on Tuesday as the ridge shift overhead.
While high pressure continues to build into the region, low-level moisture has been slow to scour out across southern IN and portions of northern Kentucky. Under the clouds, temperatures were in the lower to middle 40s, but have warmed into the lower-mid 50s in the sun. Temperatures should remain in the upper 40s to the lower-mid 50s across the region before dropping into the upper 30s to the lower 40s this evening. Lows will range from the lower 30s in the east to the mid-upper 30s in the west. For Tuesday, we'll see another partly cloudy day with afternoon highs topping out in the lower to mid 50s. Lows Tue night will range from the upper 20s in the east to the lower-mid 30s in the west.
Lows will sink into the mid-40s in the north as the dry cold front passes through the CWA. Lows will be warmer in the south, in the low 50s. Temperatures will fall into the lower to mid 40s in areas along and north of the I-20 corridor.
High pressure remains in place at the surface, promoting a dry and beautiful day across the Tennessee Valley this afternoon. As of 20z, temperatures have climbed into the low to mid 60s across the region and may make it degree or two higher before we start to lose the sun angle. These clouds will have an impact on low temperatures as they may actually help keep them at least a few degrees warmer than they might have been. Locations south of the Tennessee River are most likely to experience this and have trended lows in the lower 40s there. Further north, readings in the upper 30s are generally expected, with a few locally cooler spots over Southern Middle Tennessee.
The next cold front expected to move through overnight, with north winds increasing ~13-16 kts with gusts 22-25 kt range by 15z Tuesday. Feature will be sufficient to drive a cold front across the forecast area through the overnight hours bringing no more than a few showers to the coastal waters and possibly the immediate coast.
VFR at all sites through the next 24 hours as high pressure approaches the area.
Raised lows just a bit, mainly in the east which will not fall off into the low teens as expected but in a few spots elsewhere.
Lows will range from the mid-50s in our northern areas to the lower 60s in our southern areas.
KPGD, KFMY, and KRSW could experience some patchy fog along with the lower cigs, bringing vsbys down to MVFR or lower as well.
A quiet evening is in place, ahead of an approaching shallow trough.
The upper trough will move east overnight, helping to push the front southward through the region. The next cold front expected to move through overnight, with north winds increasing ~13-16 kts with gusts 22-25 kt range by 15z Tuesday. Feature will be sufficient to drive a cold front across the forecast area through the overnight hours bringing no more than a few showers to the coastal waters and possibly the immediate coast.
A warm day across South Florida with highs in the upper 80s with some places reaching the low 90s. SHORT TERM: Warm temperatures Tuesday ahead of an upper level trough and an approaching front.
Unidirectional flow out of the west in the low levels, enhanced a bit aloft, suggest a chance for strong wind gusts tomorrow especially if surface instability can be maximized through breaks in the cloud cover.
/issued 201 PM CDT Mon Apr 9 2018/ West to northwest flow aloft will prevail through Tuesday night as an upper level trough moves east across the northern United States. A cold front is currently heading toward the Big Bend and should track into northern Mexico this evening. The flow aloft will also allow another dry reinforcing cold front to move through the forecast area later tonight.
These are still expected to fade by midnight, or shortly thereafter for the higher elevations, as the disturbance progresses eastward. Otherwise, temperature recovery through Tuesday will continue to be limited though as the Upper Ohio Region remains under the influence of broad upper troughing.
Tomorrow, little if any precipitation is expected with high pressure pushing in.
The resulting snow showers are still expected to fade by midnight, or shortly thereafter for the higher elevations, as the disturbance progresses eastward. Otherwise, temperature recovery through Tuesday will continue to be limited though as the Upper Ohio Region remains under the influence of broad upper troughing.
Chattanooga Airport, TN 42 64 38 67 / 0 10 10 10 Knoxville McGhee Tyson Airport, TN 40 60 36 65 / 0 10 10 10 Oak Ridge, TN 39 61 35 65 / 0 10 10 10 Tri Cities Airport, TN 37 57 33 62 / 10 10 10 10.
Slow improvement is expected to continue this evening as cigs gradually rise due to drying in the low-levels.
High pressure will build over the area tonight then gradually shift downstream from Utah late Tuesday.
Jaszka An upper level ridge of high pressure will reside over the region through Tuesday morning. On Tuesday afternoon, an upper level disturbance will approach from the west, bringing with it a chance for rain showers and cooler temperatures.
1138 PM CDT Mon Apr 9 2018 A weak reinforcing cold front was pushing across the CWA late this evening.
Several of the hi-res models manage to develop some convection near the coastal plains this afternoon and we will mention a low chance (20%) for the Highway 77 corridor today.
NRN AR is still seeing dewpts in the low to mid 60s to far early this morning.
230 AM EDT Mon Jun 12 2017 Sub-tropical ridge of high pressure will extend into the Southeast through the middle of the week.
630 AM EDT Mon Jun 12 2017 Sub-tropical ridge of high pressure will extend into the Southeast through the middle of the week.
Ridge axis of high pressure over the west Atlantic will remain north of the area, with a relatively light low level onshore flow continuing across the area. However, we should see some breaks in the cloud cover occur, and models also indicate a slightly unsettled pattern aloft with weak trough west of the area. Lows overnight will range from the low to mid 70s. Axis of high pressure ridge is forecast to sag a little south with the wind flow in the lower levels becoming southeast.
Afternoon surface analysis showing an area of high pressure remains parked off to the east. We continue to see increased moisture as dewpoints have climbed into the low 60s. Mid-upper level ridging over the southeast CONUS will be in an ongoing decay process as the period starts.
/issued 213 PM CDT Sun Jun 11 2017/ SHORT TERM (Tonight through Monday Night):Upper high centered in the vicinity of west central Mexico to maintain generally light north flow aloft over deep south TX through the period while southeasterly onshore flow will prevail at the surface.
Low pressure will move east of the area today with a strong ridge of high pressure building over the region in its wake. Cooler than normal weather will quickly give way to a sharp warming trend with temperatures rising to well above normal by late in the week. After a day of much cooler than normal temperatures, showers, thunderstorms and mountain snow, the precipitation has come to an end. Water vapor imagery shows the center of the deep cyclone now centered over West Central Nevada with wrap around clouds pushing into the Sierra. Models continue to trend the low center moving east today and by Tuesday, place this feature over the northern Rockies as high pressure builds over California.
Upper ridge slowly breaks down Tuesday onward with thunderstorm chances on the increase through rest of the week. There should be more in the way of cu along with some cirrus, making 90 degrees a somewhat lofty goal for the lowland airport sites. High pressure remains in control with dry conditions across the eastern third of the U.
High pressure centered over the Mid-Atlantic will put the area in a southeasterly flow and really pump some deep moisture into the area during the afternoon. On Tuesday, low- level ridging is off to our east giving us southerly flow.
The low clouds will lift by mid Monday morning and VFR conditions will prevail for a few hours.
Expect cooler than average temperatures today with some breezes this afternoon. Strengthening high pressure aloft will then bring a strong warming trend Tuesday into this weekend. A low pressure system was centered over central Nevada early this morning. The upper low will move northeastward into eastern Idaho by this evening.
553 AM CDT Mon Jun 12 2017 A deep layer ridge will remain anchored in the southeastern U. Temperatures today look a tad warmer than yesterday. Increasing low level moisture/dew points in response to southerly flow around the western periphery of the low level anticyclone will result in slightly higher humidity than yesterday, but not quite as high as some of the deterministic solutions prog.
By tomorrow afternoon, expect the dryline to mix further east as the low level flow begins to veer and a vort lobe rounding the southern periphery of an upper low moves over the panhandle. The highest chances will likely be seen across northern, southern, and eastern OK.