Aikyam-Lab/Synoptic-Bench huggingface dataset:
A weak coastal trough is expected to develop tonight and shift inland during the morning on Sunday. This coastal trough will be the main focus for convection, aided by a favorable upper level pattern with an upper level low to the west providing lift and divergence over the region. The position of the trough will be key tomorrow with the best surface convergence within it. Have kept with cooler high temperatures for Sunday with deep moisture, rainfall and cloud cover across the region. High temperatures should be several degrees below normal in the lower to mid 80s.
High pressure is currently centered over the northern plains, while a cold front extends along parts of the east coast, and a low pressure system is moving through the Pacific northwest.
It will begin to shift slowly east during the day on Sunday while the upper level ridge settles in over the area. An upper level low over northern Mexico will bring some cloudiness to our southern zones during the day on Sunday but should be far enough south to keep precipitation chances outside of our area. Temperatures will continue to warm to near normal values as the region maintains a drying pattern under this high pressure.
1250 PM CDT Sat May 30 2020 325 AM CDT Another pleasant day is in store across much of the area today with temperatures only warming up into the low 70s. A lake breeze is expected to develop by early afternoon which will begin to surge inland by mid afternoon aided by a backdoor cold front.
230 PM EDT Sat May 30 2020 The Ohio Valley remains under the front of an upper ridge. This drier air will keep the region dry and cooler through the short-term. Temperatures will drop to the low 50s for most. Expect high temperatures will range from the low to mid 70s.
156 PM EDT Sat May 30 2020 A cold front will move through the region this afternoon and evening. This heating will fuel weak to moderate instability(1500 to 2500 MLCAPE) which will trigger some pop up convection area-wide this afternoon with the potential for a more organized area/band of convection to develop along the lead sfc front/trough currently located in the lee of the mtns, which will then move west to east across the forecast through the early evening. Upper troughing will be located from the Great Lakes to New England.
Forecast Confidence: Medium to High pressure will be building into the region tonight into Sunday. As the high pressure build into the region, skies will begin to clear and dry conditions will persist. The high pressure will be moving southeast out of the area Sunday night.
121 PM EDT Sat May 30 2020 A noticeably cooler and drier, less humid airmass will move into the area for the last weekend in May with temperatures trending below normal to start June. Morning satellite clearly delineates a secondary cold front dropping through northwest PA and eastern Oh this morning. Max temps are forecast to be about 10 degrees cooler than yesterday in the mid 60s to upper 70s or near-seasonal averages for late May. Some low clouds may develop again across the NW Alleghenies, otherwise expect mostly clear skies tonight with lows ranging from around 40F in the northern tier to around 50F in the Lower Susq. Temperatures will continue to trend lower (cooler) and bottom out Sunday night.
752 PM EDT Sat May 30 2020 A secondary cold front will cross the area late tonight into Sunday morning.
1039 PM EDT Sat May 30 2020 A secondary cold front will cross the area late tonight into Sunday morning.
812 PM EDT Sat May 30 2020 It has been a relatively active weather pattern this afternoon with storms producing some strong gusts in the 35-45 knot range, with the highest coverage over the interior section.
With upper-ridge in place, mostly clear skies to prevail tonight with the exception of thin cirrus along and south of I-20. /issued 608 PM CDT Sat May 30 2020/ Surface and upper-level ridge of high pressure to maintain VFR conditions across area terminals through the forecast period ending 01/00Z. It will begin to shift slowly east during the day on Sunday while the upper level ridge settles in over the area. An upper level low over northern Mexico will bring some cloudiness to our southern zones during the day on Sunday but should be far enough south to keep precipitation chances outside of our area. Temperatures will continue to warm to near normal values as the region maintains a drying pattern under this high pressure.
An area of high pressure centered over the North Dakota/Minnesota border will slowly move east through the day with strong with mostly clear skies and light winds through the evening. On Sunday partly cloudy skies continue as the center of high pressure slowly drifts eastward. Global and mesoscale models are in agreement that as the upper level ridge axis moves into the Dakotas tomorrow, 850 mb winds will turn more southerly with WAA and warmer temperatures beginning Sunday.
/NEW/ /Tonight though Sunday Night/ An upper low spinning over Mexico will bring scattered high clouds to Central and South Texas tonight. The clouds will have little influence on temperatures with lows falling into the lower and middle 60s by sunrise Sunday. The high clouds will increase in coverage from south to north on Sunday as the upper low drifts northward. Lows Sunday night will be a bit warmer (mid and upper 60s) due to more extensive clouds and increasing low level moisture.
733 PM EDT Sat May 30 2020 Quiet and cool weather will persist into tonight and Sunday as high pressure builds in.
High pressure has brought beautiful weather to eastern Iowa and northwest Illinois. Lows will range from the lower 40s in the NE to the lower 50s far southwest. The comfortable temps and low humidity continue for Sunday with highs in the low 70s on average, which is about 5 degrees below normal.
Moisture will deepen over south Texas late tonight as an upper low drifts northward over northeast Mexico. A weak coastal trough is expected to develop tonight and shift inland during the morning on Sunday. This coastal trough will be the main focus for convection, aided by a favorable upper level pattern with an upper level low to the west providing lift and divergence over the region. The position of the trough will be key tomorrow with the best surface convergence within it. Have kept with cooler high temperatures for Sunday with deep moisture, rainfall and cloud cover across the region. High temperatures should be several degrees below normal in the lower to mid 80s.
/Issued 145 PM CDT Sat May 30 2020/ A pleasant weekend is still on tap as an upper level ridge continues to move in and build over the area.
Rain and wind will follow for the remainder of tonight into Sunday morning, with much cooler temperatures.
Dry and gusty conditions continue this afternoon across the region as a rather deep closed low lifts into the Pacific Northwest and a strong southwesterly flow aloft overspreads the region.
643 PM CDT Sat May 30 2020 Water vapor imagery shows strong upper ridging across the central to northern High Plains, with NW flow aloft continuing across the CWA. from the mid 60s over Holt and Boyd counties to the lower 80s across Chase and Hayes counties. The upper ridge and thermal ridge centered over the central to northern Rockies will slide eastward across western and central Nebraska tomorrow.
A disturbance moving north on the upstream side of an upper level ridge will cross the area quickly this evening.
/issued 121 PM CDT Sat May 30 2020/ One more day of quiet weather is anticipated Sunday as an upper level ridge of high pressure remains the dominant feature.
With high pressure in control. VFR conditions for this TAF cycle as high pressure dominates the region.
/Issued 236 PM EDT Sat May 30 2020/ As the short term period begins, relatively dry northwesterly flow is building in across north Georgia behind a weak cold frontal boundary, which remains positioned across south-central Georgia.
633 PM CDT Sat May 30 2020 High pressure over the upper Mississippi Valley will gradually move southeast over the next few days bringing dry conditions and below temperatures.
The Ohio Valley remains under the front of an upper ridge. This drier air will keep the region dry and cooler through the short-term. Temperatures will drop to the low 50s for most. Expect high temperatures will range from the low to mid 70s.
Clouds are still expected to linger overnight across the area, keeping temperatures a little warmer than last night in the mid to upper 50s.
Weather conditions will be tranquil tonight as a continental high pressure system settles into the region. Northerly winds will continue across our region as the high pressure system moves southward through the Upper Midwest. For the short term portion of the forecast our region will be dominated by the continental high pressure system as it moves from the Midwest to a position off the Carolina Coast.
Upper air analysis showed trough axis from Hudson Bay to the Mid-Atlantic states and weakness from south central Gulf of Mexico across southern Mexico to eastern Pacific. Ridge axis was located from Baja California to central Plains.
The high center currently near central New Mexico will continue to slowly shift eastward over the next 36 hours as a trough digs along the west coast and a deep inverted trough pushes across northern Mexico.
841 PM CDT Sat May 30 2020 High pressure over the upper Mississippi Valley will gradually move southeast over the next few days bringing dry conditions and below normal temperatures.
635 PM CDT Sat May 30 2020 Area of mid-level cloud cover and scattered showers have persisted across northern Missouri for much of the day, and this general trend should continue for the next 12-18 hours as a weak surface warm front lifts north and isentropic ascent remains.
High pressure will continue to dominate the central CONUS for the rest of today and Sunday with very warm temperatures over the Panhandles. The story doesn't change much for Sunday as the high doesn't really move much over the CONUS, and therefore not much different.
Besides adjustments to nighttime temps to bump them down a bit towards the lower end of guidance (accounting for good radiational conditions), no other changes were necessary.
A new pacific low will develop as the ridge continues to wobble and slowly slide eastward.
909 PM CDT Sat May 30 2020 Quiet weather across the Tennessee Valley tonight with high pressure at the surface building into the area from the north and west. Northerly flow around 5-10 mph should help to keep the low-level boundary layer mixed and temperatures a few degrees warmer than they might normally have been, in the mid to upper 50s. For the short term portion of the forecast our region will be dominated by the continental high pressure system as it moves from the Midwest to a position off the Carolina Coast.
A weak upper low tracking west towards the Big Bend region tomorrow, will bring a chance of showers and a few thunderstorms to the southern terminals during the afternoon hours. An upper level low currently over northern Mexico will slowly track north on Sunday. Isolated to scattered showers and thunderstorms are possible Sunday, with the highest rain chances along the Interstate 10 corridor.
620 PM CDT Sat May 30 2020 High pressure continues over the area this evening.
Clouds will be on the increase late day Sunday through Sunday night as the upper ridge approaching the area begins to flatten and high pressure loses its influence.
Overnight lows look to drop into the lower 50s. The Ohio Valley remains under the front of an upper ridge. This drier air will keep the region dry and cooler through the short-term. Temperatures will drop to the low 50s for most. Expect high temperatures will range from the low to mid 70s.
346 PM MDT Sat May 30 2020 High pressure ridging will be over the forecast area for the remainder of this afternoon into this evening as a trough and upper low will be situated over northern California/southern Oregon. The ridge will provide for sunny skies through late afternoon. Model soundings show a strong cap in place across the lower elevations. The trough and upper low move inland and northeast over Oregon and Idaho by daybreak Sunday. This will result in the ridge axis being shifted east over the western Dakotas. In addition, a cold front will move across the forecast area during the afternoon.
Overnight lows will remain in the lower 80s for much of the island chain. An Atlantic ridge axis will hold across Florida through Sunday night. Thereafter, moderate to fresh easterly breezes are expected as high pressure emerges off the North Carolina coast and builds south down the Sunshine State.
Storms will initially develop over the high terrain, but will generally move onto adjacent lower elevation locations by the evening hours.
213 PM PDT Sat May 30 2020 Low pressure moves through today bringing cooler weather with showers and thunderstorms. Low pressure area over the region will generate showers and scattered thunderstorms this afternoon. The low lifts northward this evening into Oregon and thunderstorm activity is expected to die down by 9 pm. A trough of low pressure will remain along the west coast on Sunday.
/issued 205 PM CDT Sat May 30 2020/ Dry, benign weather conditions will continue tonight and Sunday with upper level high pressure overhead and moisture shunted away from the area. Solutions are in decent agreement showing these storms making only limited eastward propagation due to the unfavorable upper level ridge and lack of low level inflow or instability.
958 PM EDT Sat May 30 2020 Cooler temperatures will last the rest of the weekend.
1003 PM EDT Sat May 30 2020 High pressure dominates the weekend. A high pressure system will continue to build into the area with a light north/northwesterly flow.
725 PM EDT Sat May 30 2020 High pressure dominates the weekend. A high pressure system will continue to build into the area with a light north/northwesterly flow.
608 PM CDT Sat May 30 2020 Surface and upper-level ridge of high pressure to maintain VFR conditions across area terminals through the forecast period ending 01/00Z. It will begin to shift slowly east during the day on Sunday while the upper level ridge settles in over the area. An upper level low over northern Mexico will bring some cloudiness to our southern zones during the day on Sunday but should be far enough south to keep precipitation chances outside of our area. Temperatures will continue to warm to near normal values as the region maintains a drying pattern under this high pressure.
113 AM EDT Sun May 31 2020 High pressure will keep conditions quiet and cool for Sunday through Monday.
High pressure is expected through early this week. Model forecast soundings indicate the lower levels of the air mass are quite dry, so expecting little in the way of diurnal cloud, despite the cool 850mb temperatures.
1123 PM EDT Sat May 30 2020 High pressure will keep conditions quiet and cool for Sunday through Monday.
Storms will initially develop over the high terrain, but will generally move onto adjacent lower elevation locations by the evening hours. The center of the 500 mb high pressure is over NM this afternoon and it will elongate from west to east tonight then develop two highs Sunday into Sunday night, one over northern NM and the other in OK. A weak upper level trough is impacting northwest NM this afternoon and it will pass to our north tonight. The high western and northern terrain will remain favored with isolated to scattered storms in the afternoon and limited activity into the lower elevations Sunday evening.
310 AM CDT Sun May 31 2020 High pressure was providing clear skies and chilly conditions overnight. Will keep the Frost Advisory going across central WI as readings across that area will likely dip into the lower 30s early this morning. For today, the area of high pressure will slide into the Great Lakes region, setting up southerly winds and slightly warmer temperatures. Will likely see some increase in high clouds later in the afternoon ahead of an approaching warm front. Warm air advection and increasing moisture transport will nose into the area tonight as a warm front lifts out of the Plains into the region. Scattered showers and a few thunderstorms will be seen Monday as the warm front continues to push northeast into the area.
120 AM EDT Sun May 31 2020 High pressure will spread across the region from the northwest through Sunday moving east toward the coast on Monday.
Otherwise, the breezy easterly winds will shift more westerly and increase on Sunday with the passage of a Pacific cold front. A cold front will then bring windy but dry conditions for much of the day on Sunday with continued above normal temperatures. Otherwise, a passing cold front will help clear out the area and bring strong southwesterly to westerly winds for Sunday. /ISSUED 555 PM MDT Sat May 30 2020/ A disturbance moving north on the upstream side of an upper level ridge will cross the area quickly this evening.
206 AM EDT Sun May 31 2020 High pressure will maintain dry and cooler than average weather through Monday. Daytime max temperatures will top out around 10 degrees below normal on average with upper troughing and cool northwesterly flow in place. High pressure will maintain dry conditions on Monday with temperatures increasing back to normal values for this time of year.
The main cold front, now pushing south through central NC will merge with the pre-frontal trough and convective outflows over the Coastal Plain then move offshore by daybreak. It will be much cooler with highs today in the 70s. Dry high pressure will move overhead.
429 AM EDT Sun May 31 2020 State remains under northwesterly upper flow between the east coast/western Atlantic trough and the southern plains ridge through the short-term forecast period. The upper ridge centered west of the MS River will expand across the southeast through the period.
High pressure anchored over the Upper Midwest/Great Lakes will continue to dominate the weather today. Mid and high clouds currently poised upstream across central/western Iowa will erode as they push into the prevailing ridge axis, with only a few clouds reaching the Illinois River Valley. As the high shifts further east away from the region, WAA clouds will gradually spill into the area late tonight.
/issued 812 PM EDT Sat May 30 2020/ It has been a relatively active weather pattern this afternoon with storms producing some strong gusts in the 35-45 knot range, with the highest coverage over the interior section.
130 AM EDT Sun May 31 2020 High pressure dominates the weekend. A high pressure system will continue to build into the area with a light north/northwesterly flow. Dry and continued cooler on Monday under the influence of high pressure and a northwesterly flow aloft.
High pressure takes control of the region on Sunday then moves to the Middle Atlantic Coast by late Monday.
An upper level ridge impinging on Texas retreats a bit north as an upper level low over northern Mexico inches north a bit. 00 inches in the aftn and no capping should yield fairly high rain chances over area with the higher rain chances over mainly the southern half of the area. High temperatures on Sunday will be cooler SW with clouds and rain and warmer to the NE closer to the upper ridge. On Sunday night, another upper level disturbance will rotate around the upper low into the area and will keep at least isolated showers going through early Monday.
251 AM CDT Sun May 31 2020 Yet another day of quiet weather is on tap across the area as upper level ridging remains overhead (albeit gradually weakens through the day). These SE winds combined with slightly cooler temperatures aloft will allow this afternoon's highs to be a few degrees cooler compared to yesterday. This will lead to slightly warmer overnight temperatures and the potential for patchy fog or low clouds to develop around daybreak tomorrow. The improved moisture and proximity of the low will support the risk of a few showers and weak thunderstorms Monday afternoon into Monday night, favoring our southern and southeastern zones. In addition, the improved moisture and cloud cover will secure temperatures slightly below average, with highs mostly in the lower to middle 80s on Monday.
Temperatures return to near- normal values for the end of May, with highs in the low to mid 70s. The threat area looks to be from central/east central MN into west central WI just downstream of the mid-level capping supplied by the advancing ridge.
1144 PM MDT Sat May 30 2020 many storms were noted over the higher terrain early this afternoon, while over the large valleys and plains skies were generally mostly sunny. max temps tomorrow will be a 2-3F cooler than today, but it still will be hot across the region. The upper ridge axis will be positioned near the CO/KS border through Mon, while a trough of low pressure begins to strengthen off the West Coast. This will increase the moisture advection across the Four Corners and up into the western half of Colorado, providing an enhanced fuel source for aftn and evening thunderstorms over the higher terrain and adjacent plains. Expect highs in the mid 70s to mid 80s for the high valleys, and mid 80s to mid 90s for the plains.
This will continue to keep low moisture levels in place trough Mon night. This dry air and upper level ridging will keep precip chances low.
Expect overnight lows to be in the lower to mid 50s. The GFS is suggesting chances for afternoon showers in far southeastern SD, northwestern IA, and northeastern NE, which would be occurring along the axis of positive theta-e advection in the low-level jet. The sun could peek out a couple times behind the clouds, but mostly cloudy skies are expected with afternoon temperatures maxing out in the lower-mid 70s. As upper level ridging builds over the region, Monday will start off partly cloudy but will become mostly sunny by late morning, and will be our first real taste of summer. With the dew points in the 60s, heat index values are pushed into the lower-mid 90s, with the only relief from the heat being the winds which will remain breezy throughout the day.
Temperatures should be a bit warmer today, aided by building ridge and slightly stronger winds.
402 AM EDT Sun May 31 2020 A weak cold front will be draped over north Florida today. This will push the ridge into south Florida and shift our winds to a more southwest and west direction.
217 AM EDT Sun May 31 2020 Cool high pressure dominates the weekend. Cool Canadian high pressure settles into the Ohio Valley with temperature readings slightly below normal today, and more below normal tonight. Tonight, with the dry air in place and clear, calm conditions otherwise, temperatures will fall into the 40s for the lowlands/southern and central mountains and the 30s in the highest elevations. Keeping all locations above freezing, but may need to be concerned about patchy frost, mainly in the highest elevations. Dry and continued cooler on Monday under the influence of high pressure and a northwesterly flow aloft.
A low and mid level (below 700 mb) ridge axis accompanied by a significant dry layer will hold firm across our area for the next couple of days. Thereafter, an extensive region of high pressure over the Eastern United States will expand and migrate southward, while a lengthy area of low pressure located over Central America slowly moves little.
300 AM EDT Sun May 31 2020 A cold front crossed the region early this morning accompanied by scattered showers. Much cooler and drier air follows for today with temperatures running below normal into the first part of the work week.
303 AM CDT Sun May 31 2020 An anomalous upper-level ridge will maintain a hold on our weather pattern for a few more days, providing warm and dry weather across the Mid-South. This ridge, currently extending poleward along the spine of the Rocky Mountains will slowly shift east as the Hudson Bay trough affecting the eastern CONUS lifts northeast over the Canadian Maritimes early in the week. Trapped beneath the ridge, an upper-level low over northeast Mexico will meander over the Southern Plains for a few days but won't have much affect on our weather until closer to midweek.