Aikyam-Lab/Synoptic-Bench huggingface dataset:
516 PM MDT SAT APR 23 2016 UPPER LOW IS CURRENTLY LOCATED NEAR SALT LAKE WITH SOUTHERLY FLOW ALOFT AHEAD OF IT. CLOSED LOW WILL MOVE EASTWARD OVER WYOMING OVERNIGHT WITH ASSOCIATED FROPA. UPGRADED THE HIGH WIND WATCH OVER THE WIND PRONE AREAS AND DECIDED TO ALSO INCLUDE THE LARAMIE VALLEY AND CENTRAL LARAMIE COUNTY. SCATTERED SHOWERS WILL OCCUR SUNDAY IN MOIST NORTHWESTERLY FLOW ON THE BACKSIDE OF THE UPPER LOW.
313 PM MDT SAT APR 23 2016 UPPER LOW IS CURRENTLY LOCATED NEAR SALT LAKE WITH SOUTHERLY FLOW ALOFT AHEAD OF IT. CLOSED LOW WILL MOVE EASTWARD OVER WYOMING OVERNIGHT WITH ASSOCIATED FROPA. UPGRADED THE HIGH WIND WATCH OVER THE WIND PRONE AREAS AND DECIDED TO ALSO INCLUDE THE LARAMIE VALLEY AND CENTRAL LARAMIE COUNTY. SCATTERED SHOWERS WILL OCCUR SUNDAY IN MOIST NORTHWESTERLY FLOW ON THE BACKSIDE OF THE UPPER LOW.
A WARM FRONT EXTENDED FROM THIS LOW AND WAS DRAPED ALONG THE SOUTHERN BORDER. WITH THIS WARM FRONT REMAINING JUST SOUTH OF OUR BORDER TONIGHT/SUNDAY. WITH THE TURTLE MOUNTAINS PINPOINTED FOR THE HIGHEST SUSTAINED WINDS OF AROUND 30 MPH AND GUSTS TO 45 MPH.
323 PM MDT SAT APR 23 2016 THE UPPER TROUGH OVER NORTHERN UTAH/SOUTHWESTERN WYOMING THIS AFTERNOON WILL TRACK TO THE NORTHEAST INTO CENTRAL WYOMING OVERNIGHT. BEST QG ASCENT ASSOCIATED WITH THIS PASSING TROUGH WILL AROUND 00Z THEN STRONGER QG DESCENT BUILDS IN FROM THE WEST. SEVERAL SHORT WAVE TROUGHS MOVING OFF THE PACIFIC AND INTO THE SOUTHWESTERN U.
A LOW PRESSURE SYSTEM CROSSING NORTHERN UTAH WILL MOVE EAST OF THE AREA TONIGHT.
IN THESE AREAS THE PRESSURE GRADIENT WAS RELAXING IN THE WAKE OF THE COLD FRONT WHICH PASSED THROUGH THE AREA THIS AFTERNOON. AS OF ABOUT 5 PM THE COLD FRONT WAS MOVING THROUGH CENTRAL CO. BEHIND THE FRONT WILL BE SIGNIFICANT CLEARING AND COOLER TEMPERATURES AND BREEZY NORTHWEST WINDS WILL CONTINUE OVERNIGHT. THE COLD FRONT AND STRONG WINDS WILL BLOW THROUGH THE AREA TONIGHT. AT MID AFTERNOON THE COLD FRONT HAD MOVED INTO CENTRAL COLORADO WITH ABOUT 10 DEGREES OF COOLING AFTER FROPA.
AN AMPLIFIED UPPER LEVEL PATTERN CONTINUES WITH A POSITIVELY TILTED UPPER LEVEL TROUGH EXTENDING ALONG THE EASTERN SEABOARD FROM VIRGINIA TO NORTHERN FLORIDA. THIS TROUGH CONTINUES MOVING EAST WHILE RIDGING OVER TEXAS MOVES EAST AND BUILDS IN OVER THE EASTERN HALF OF THE CONUS. ON THE SURFACE A FRONTAL BOUNDARY CONTINUES TO PULL AWAY FROM FLORIDA WHILE A BROAD AREA OF HIGH PRESSURE EXTENDS SOUTH FROM THE GREAT LAKES INTO THE NORTHERN GULF OF MEXICO. WE WILL SEE A WARMING TREND WITH TEMPERATURES STARTING ON SUNDAY COMING IN 2 TO 4 DEGREES ABOVE NORMAL WITH DAYTIME HIGHS IN THE MID TO UPPER 80S AND OVERNIGHT LOWS IN THE LOW TO MID 60S.
330 PM CDT SAT APR 23 2016 CLOSED CUTOFF LOW OVER THE GREAT BASIN WORKING UNDER THE RIDGE OVER THE NORTHERN PLAINS INTO THE WESTERN PROVINCES OF CANADA. A TROUGH FROM HUDSON BAY INTO THE NORTHEAST CONUS AND TROUGH ALONG THE ATLANTIC COAST. LARGE UPPER CLOSED LOW OVER THE GULF OF ALASKA BEGINNING TO AFFECT THE PACIFIC NORTHWEST. LOCALLY GUSTY WEST TO NORTHWEST WINDS ARE EXPECTED LATE MORNING THOUGH THE AFTERNOON AS A PACIFIC COLD FRONT/PRESSURE RISES SURGE ACROSS THE AREA. NAM AND GFS VERY SIMILAR WITH ECMWF SLIGHTLY SLOWER AND COOLER. 500MB PATTERN OVER THE NEXT 7 DAYS FAVORS A CLOSED LOW OVER THE ALEUTIANS OR GULF OF ALASKA WITH WAVES MOVING UNDERNEATH AND CLOSING OFF OVER THE GREAT BASIN MOVING UNDER THE CENTRAL PLAINS RIDGE MEANDERING AROUND THE CENTRAL PLAINS BEFORE BEING ABSORBED BY PERSISTENT NORTHEAST CONUS TROUGH CLOSED LOW.
AN APPROACHING LOW PRESSURE SYSTEM WILL KEEP THE REGION COOL AND UNSETTLED WITH INCREASING CHANCES OF SHOWERS.
THE TROUGH WILL PRODUCE BREEZY SOUTHERLY WINDS AT KAMA. THE TROUGH IS EXPECTED TO TOUCH OFF SOME THUNDERSTORMS LATE TODAY AND TONIGHT GENERALLY ACROSS THE NORTHWEST TEXAS PANHANDLE AND WESTERN OKLAHOMA PANHANDLE. DEEPENING TROF TO ITS BASE WILL CREATE STRENGTHENING SOUTHWEST FLOW ACROSS PANHANDLES TODAY AND TONIGHT. DYNAMICS AND COLD AIR FROM TROF WILL SUPPORT ISOLATED THUNDERSTORMS THIS AFTERNOON AND TONIGHT.
956 PM EDT SAT APR 23 2016 HIGH PRESSURE WILL MOVE EAST ACROSS THE CENTRAL GREAT LAKES TONIGHT AND TO THE MID ATLANTIC COAST BY SUNDAY EVENING.
BY SUNDAY AN UPPER RIDGE WILL BUILD ACROSS REGION WHICH WILL CONTINUE TO KEEP MOSTLY SUNNY SKIES AND WARMER TEMPS OVER THE CWA. HIGHS ON SUNDAY WILL BE IN THE LOWER 80S.
HIGH PRESSURE EXTENDS FROM THE GREAT LAKES INTO THE LOWER MISSISSIPPI VALLEY WITH CLEAR SKIES AND LIGHT NORTH WINDS ACROSS THE MIDSOUTH.
WOULD LIKE TO LEAN A BIT MORE TOWARD THE HIGHER RESOLUTION MODELS.
UPPER AIR ANALYSIS THIS MORNING SHOWED A RIDGE FROM TEXAS TO THE NORTHERN PLAINS WITH A TROUGH OVER THE WEST AND A SHALLOW LOW AT THE BOTTOM OF IT OVER WESTERN MEXICO. THE LOW WAS PULLING MID- LEVEL MOISTURE INTO SOUTH TEXAS FROM THE GULF. THERE WAS HIGH PRESSURE OVER TEXAS. THE UPPER LOW OVER MEXICO WILL OPEN AND BECOME PROGRESSIVE MOVING ACROSS TEXAS DURING THIS PERIOD.
THIS WILL ALLOW LOW TEMPERATURES TO FALL INTO THE LOW 50S ACROSS MUCH OF THE AREA.
HIGH PRESSURE WILL PROVIDE A DRY WEEKEND ACROSS CENTRAL INDIANA.
CHATTANOOGA AIRPORT, TN 52 81 58 83 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 48 79 56 83 / 0 0 0 0 OAK RIDGE, TN 48 79 57 83 / 0 0 0 0 TRI CITIES AIRPORT, TN 45 78 49 81 / 0 0 0 0.
627 PM CDT SAT APR 23 2016 AN UPPER LEVEL SHORT WAVE TROUGH WILL EJECT FROM THE COLORADO ROCKIES ONTO THE CENTRAL HIGH PLAINS SUNDAY MORNING. UNTIL THE UPPER LEVEL LOW PUSHES CLOSER TO THE REGION. WINDS WILL BE MOSTLY OUT OF THE WEST BY EARLY TOMORROW AFTERNOON ACROSS THE CAPROCK AND WILL INCREASE TO THE 25 MPH RANGE AS THE MAIN ENERGY FROM THE UPPER LOW PASSES TO OUR NORTH.
602 PM EDT SAT APR 23 2016 HIGH PRESSURE WILL MOVE EAST ACROSS THE CENTRAL GREAT LAKES TONIGHT AND TO THE MID ATLANTIC COAST BY SUNDAY EVENING.
A STORM PASSING BY TO THE NORTH WILL BRING AFTERNOON BREEZES AND COOLER TEMPERATURES THIS WEEKEND.
346 PM EDT SAT APR 23 2016 HIGH PRESSURE AND DRY CONDITIONS HOLD OVER THE AREA THROUGH SUNDAY.
A FRONTAL SYSTEM EXITS THE REGION TODAY AS THE MID-LEVEL TROUGH DEPARTS LATER TODAY INTO TONIGHT. AS TODAY'S WESTERLY FLOW FLIPS AND EASTERLY FLOW RETURNS FOR MUCH OF THE PERIOD, THE WARMER TEMPERATURES WILL SHIFT FROM THE EAST COAST TO ALONG THE INTERIOR AND WEST COAST PORTIONS OF THE FORECAST AREA.
HIGH PRESSURE BUILDING IN ACROSS THE SOUTHERN APPALACHIAN REGION THIS TAF PERIOD.
A COLD FRONT HAS MOVED THROUGH ALL BUT THE FAR SOUTHEAST CORNER OF THE STATE AS WINDS HAVE BECOME NORTHEASTERLY ACROSS THE FORECAST AREA. THE UPPER LOW IS PROVIDING FOR A DIFFLUENT SOUTHERLY FLOW ALOFT ACROSS THE AREA. AS THE UPPER LOW SLOWLY MOVES EAST. TEMPERATURES SUNDAY AFTERNOON INTO SUNDAY NIGHT FALL NEAR FREEZING ACROSS THE PLAINS PROVIDING A RAIN/SNOW MIX POSSIBILITY. AN ADVISORY FOR THE BIG HORNS MAY BE NEEDED SUNDAY AFTERNOON INTO SUNDAY NIGHT AS 700MB TEMPERATURES FALL BELOW FREEZING.
SURFACE ANALYSIS SHOWS THE WARM FRONT LOCATED NEAR/ALONG OUR SOUTHERN BORDER. THIS MOSTLY COVERS THE JAMES RIVER VALLEY WHICH IS CLOSER TO THE MAXIMUM ASCENT NORTH OF A WARM FRONT. THE 08-10 UTC HRRR ITERATIONS AND 06 UTC NAM NEST SUGGEST ADDITIONAL ISOLATED TO SCATTERED ELEVATED CONVECTION THIS MORNING SOUTHWEST AND SOUTH CENTRAL IN THE VICINITY OF THE SURFACE WARM FRONT. ISOLATED TO SCATTERED RAIN SHOWERS ARE POSSIBLE ACROSS THE SOUTH CENTRAL AND UPPER JAMES RIVER VALLEY IN THE VICINITY OF THE SURFACE WARM FRONT WHERE LOW LEVEL WARM AIR ADVECTION IS MAXIMIZED. AND AN ATTENDANT INCREASE IN PRECIPITATION CHANCES NORTH OF THE LOW INTO NORTH DAKOTA.
MILD CONDITIONS FOR THE REGION AS THE CWA LIES BETWEEN HIGH PRESSURE TO THE EAST AND A STRONG LEE-SIDE TROUGH TO THE WEST OVER THE FRONT RANGE. LEE-SIDE TROUGH WILL BEGIN TO PUSH EASTWARD TOWARD THE PLAINS REGION. BUT THE CWA WILL SEE SOME CONVECTION BEGINNING TO FORM ALONG OR JUST BEHIND TROUGH. ESPECIALLY NEAR THE 40-50 DEWPTS AHEAD OF TROUGH FROM HIGHWAY 27 EASTWARD. UPPER LOW IN TANDEM SHIFTS MORE N AND E.
AN UPPER LEVEL LOW PRESSURE CENTER OVER NORTHEASTERN NEVADA WILL MOVE INTO WESTERN WYOMING BY EARLY THIS EVENING. ROUNDING THE BASE OF THE UPPER TROUGH WILL BE AN H3 JET MAX OF 70-90KTS. THE UPPER LOW CENTER WILL MOVE INTO NORTHEAST WYOMING AS THE BASE OF THE UPPER TROUGH ROTATES NORTHEAST FROM CO THROUGH WESTERN NEBRASKA. UNSETTLED CONDITIONS ARE PREDOMINATELY IN STORE FOR THE EXTENDED AS A SERIES OF UPPER LEVEL LOWS SLOWLY MOVE THROUGH THE REGION. A PACIFIC COLD FRONT WILL REMAIN ANCHORED TO CENTRAL PORTIONS OF THE CWA EARLY ON SUNDAY. BUT SLOWLY WORK EAST THROUGH THE AFTERNOON AND EVENING HOURS AS AN UPPER LOW LIFTS EAST ACROSS SOUTHERN SOUTH DAKOTA. LOW POPS REMAIN IN THE FORECAST DUE TO THE PROXIMITY OF THE BEST FORCING ASSOCIATED THE LOW/FRONT. AS THE LOW LIFTS INTO NORTHERN IOWA.
321 PM EDT SAT APR 23 2016 RIDGE ALOFT AND AT THE SURFACE WILL GRADUALLY DRIFT EAST ACROSS THE SOUTHEAST STATES THROUGH THE SHORT TERM. AS THE CENTER OF THE HIGH DRIFTS TOWARD THE ATLANTIC COAST.
TOO DRY IN THE LOW LEVELS FOR PRECIP SO REMOVED POPS. NOSE OF THE LOW LEVEL JET.
The winds should also keep temps noticably warmer than last night. Another beautiful spring day is on tap Sunday, although it is expected to be noticeably warmer and breezier than today. These conditions will be provided by strengthening return flow on the back side of upper level/surface ridging.
AN UPPER LEVEL LOW CURRENTLY IN UTAH WILL MOVE EAST INTO THE PLAINS ON SUNDAY. THE LOW LEVEL JET WILL INCREASE OVERNIGHT TO AROUND 30 KTS FROM THE SOUTH WHICH MAY RESULT IN SOME LLWS PROBLEMS SUNDAY MORNING. /ISSUED 306 AM CDT SAT APR 23 2016/ SUBSIDENCE FROM AN UPPER LEVEL RIDGE WILL PROVIDE NICE WEATHER ACROSS NORTH AND CENTRAL TEXAS TODAY WITH MOSTLY SUNNY SKIES AND HIGH TEMPERATURES AROUND 80 DEGREES.
135 PM MST SAT APR 23 2016 A SERIES OF PACIFIC LOW PRESSURE SYSTEMS IS EXPECTED TO AFFECT OUR WEATHER THROUGH THE REMAINDER OF THIS WEEKEND.
A WEAK COLD FRONT WILL EXIT CENTRAL NC THIS MORNING. A SECONDARY COLD FRONT WILL DROP SOUTHEAST THROUGH THE AREA THIS EVENING.
949 PM EDT SAT APR 23 2016 HIGH PRESSURE BUILDS SOUTH INTO THE AREA LATER TONIGHT INTO SUNDAY.
The latest NAM/RAP 925mb condensation pressure deficit prog best depict the low clouds with the SREF favoring more widespread dense fog further north in IA. Upper level ridging spreading east into the CWA will provide for continued dry conditions. Sunday - Sunday night: The weather will become more interesting late Sunday afternoon into the evening as an upper level closed low migrates into SD/NE.
AN UPPER RIDGE OVER THE EASTERN PLAINS EASES EASTWARD DURING TONIGHT. AND NUDGES AN UPPER TROUGH OFFSHORE THE EASTERN SEABOARD. AT THE SURFACE CANADIAN HIGH PRESSURE BUILDS SOUTH ACROSS THE EASTERN STATE INTO THE GULF OF MEXICO WITH LOW LEVEL FLOW DIMINISHING SOME AND BECOMING MORE NORTHERLY TO VARIABLE. THE LOWER LAYERS ARE ALSO DRY BUT WITH ENOUGH MOISTURE. ALONG WITH THE LOW FLOW. HIGH PRESSURE BUILDS INTO THE GULF TONIGHT AND EARLY SUN THEN TRACKS EAST. AS IT RIDGES BACK ACROSS FL TO THE GULF.
THOUGH DRY AIR SHOULD ADVECT IN FROM THE NORTH AS UPPER RIDGING KICKS IN FOR THE WEEKEND.
237 PM EDT SAT APR 23 2016 HIGH PRESSURE BUILDS IN FOR TONIGHT.
250 PM EDT SAT APR 23 2016 HIGH PRESSURE BUILDS IN FOR TONIGHT.
308 PM CDT SAT APR 23 2016 ANALYSIS AT 2 PM CDT SHOWS FAIR SKIES WITH SOME CUMULUS CLOUDS OVER IOWA WITH SOUTH WINDS DEVELOPING AHEAD OF A LEE SIDE TROUGH IN THE NORTHERN HIGH PLAINS. UPSTREAM ENERGY SHOWS ZONAL FLOW WITH UPPER LOW OVER UTAH TO SLIDE EAST NORTHEAST ARRIVING IN THE UPPER MIDWEST SUNDAY NIGHT. WARM AND BREEZY WITH DEEP MIXING SUPPORTING HIGHS MOSTLY WELL INTO THE LOWER 80S AND POSSIBLY SOME MID 80S IN SW 1/3 OF THE FORECAST AREA.
504 PM MDT SAT APR 23 2016 AS OF ABOUT 5 PM THE COLD FRONT WAS MOVING THROUGH CENTRAL CO. BEHIND THE FRONT WILL BE SIGNIFICANT CLEARING AND COOLER TEMPERATURES AND BREEZY NORTHWEST WINDS WILL CONTINUE OVERNIGHT. THE COLD FRONT AND STRONG WINDS WILL BLOW THROUGH THE AREA TONIGHT. AT MID AFTERNOON THE COLD FRONT HAD MOVED INTO CENTRAL COLORADO WITH ABOUT 10 DEGREES OF COOLING AFTER FROPA.
135 PM PDT SAT APR 23 2016 HIGH PRESSURE WILL RETURN TO CENTRAL CALIFORNIA TODAY FOR A DRYING TREND AND LIGHTER WINDS.
649 PM CDT SAT APR 23 2016 DEEP LOW PRESSURE OVER WESTERN SOUTH DAKOTA AND HIGH PRESSURE ACROSS MANITOBA WERE ENHANCING THE LOW LEVEL WINDS ACROSS NORTH DAKOTA. WATER VAPOR CHANNEL SHOWS THE 700 MB UPPER LOW IN THE VICINITY OF WEST CENTRAL WYOMING. A WARM FRONT EXTENDED FROM THIS LOW AND WAS DRAPED ALONG THE SOUTHERN BORDER. WITH THIS WARM FRONT REMAINING JUST SOUTH OF OUR BORDER TONIGHT/SUNDAY. WITH THE TURTLE MOUNTAINS PINPOINTED FOR THE HIGHEST SUSTAINED WINDS OF AROUND 30 MPH AND GUSTS TO 45 MPH.
309 PM EDT SAT APR 23 2016 EXPANSIVE HIGH PRESSURE (1024 MB) IN PLACE OVER THE CENTRAL GREAT LAKES THIS AFTERNOON WILL BE SLOW TO EXIT EAST TONIGHT. RUNNING INTO THE BRICK WALL OF DRY AIR AND NORTHWEST CONFLUENT FLOW ESTABLISHED BY THE DEEP UPPER LEVEL LOW OVER EASTERN CANADA.
Last model runs still lean toward a reduction in storm activity for Saturday as a drying westerly flow moves into western parts of Arizona in response to a west coast trough. Robust morning convective activity over the Phoenix area likely at least partially forced by a mesoscale short wave trough over southwestern AZ has continued northeastward through the day today.
Upper level ridge axis was over MT. Ridge builds overnight and shifts to the MT/ND border by Sat afternoon.
717 PM EDT FRI AUG 5 2016 The area will be situated between an inland trough and Atlantic high pressure through the weekend.
708 PM EDT FRI AUG 5 2016 High pressure will build across the Great Lakes through the weekend allowing cooler and much drier air to overspread the area.
Main cold front is roughly near the Illinois River valley early this afternoon, with the drier 60s dew points not too far behind.
1022 PM EDT FRI AUG 5 2016 A cold front will result in showers and a few isolated thunderstorms overnight followed by dry and less humid weather the rest of the weekend. Another round of scattered showers and a few isolated storms will accompany a cold front as it crosses the region overnight.
917 PM EDT FRI AUG 5 2016 The area will be situated between an inland trough and Atlantic high pressure through the weekend.
Chattanooga Airport, TN 73 91 74 92 / 20 60 30 40 Knoxville McGhee Tyson Airport, TN 71 89 72 90 / 20 70 50 30 Oak Ridge, TN 71 87 72 90 / 30 70 40 30 Tri Cities Airport, TN 69 86 69 87 / 30 70 50 20.
Lows in the lower to mid 70s. encompasses CWA as low/mid level low develops over extreme NE Gulf along persistent trough axis.
Weak disturbances associated with a Pacific trough are sliding through northern Utah and southwest Wyoming this evening, and are helping to set off increasing showers and thunderstorms as of 02Z. The story starting tomorrow morning will be a drying trend, as southwesterly flow picks up ahead of a larger trough over the Pacific Northwest.
731 PM EDT FRI AUG 5 2016 No high impact weather tonight or Saturday as high pressure begins to move into the area.
1255 AM EDT SAT AUG 6 2016 The area will be situated between an inland trough and Atlantic high pressure through the weekend.
1051 PM EDT FRI AUG 5 2016 Late evening surface analysis depicts weak troughing over the southeastern states. with ridging displaced to the north of the Greater Antilles. Ridging remained centered over the southern Plains states and extends eastward to the lower Mississippi Valley. Our local pressure gradient will gradually tighten through the weekend as weak low pressure slowly develops along the Florida Big Bend coast.
718 PM EDT Fri Aug 5 2016 A cold front across southeastern Ontario and the eastern Great Lakes region will move eastward bringing scattered showers and a few thunderstorms to the North Country overnight.
Cold front has cleared our CWA this afternoon. as the main upper level trough and secondary surface response slide into far Western Upper Michigan. Main upper level trough and surface response will swing thru our CWA tonight. Secondary trough sliding thru tonight may very well make up for loss of diurnal heating. NAM12 is the only short term model that tries to develop some scattered light rain showers across our SW CWA as the trough moves thru overnight. Will keep Saturday dry as well as high pressure/subsidence and drier air build into the region. Conditions will be noticeably cooler and less humid tonight and Saturday.
740 PM EDT Fri Aug 5 2016 A cold front across southeastern Ontario and the eastern Great Lakes region will move eastward bringing scattered showers and a few thunderstorms to the North Country overnight.
631 PM CDT FRI AUG 5 2016 Main cold front is roughly near the Illinois River valley early this afternoon, with the drier 60s dew points not too far behind.
In the low levels of the atmosphere, an Atlantic ridge of high pressure will extend across south central Florida overnight. In the mid levels of the atmosphere, a trough of low pressure will be located over northeastern Gulf of Mexico tonight. In the upper levels of the atmosphere, an area of low pressure will be centered over the southeastern Bahamas overnight.
1051 PM EDT FRI AUG 5 2016 Cold front approaching tonight with increasing clouds and showers before dawn and thunder during the afternoon hours Saturday.
1034 PM MDT FRI AUG 5 2016 Upper level analysis has large ridge across the central CONUS with closed low in southwest British Columbia. At the surface, high pressure is in place across the Dakotas with return flow setting up across Northeast Wyoming and far western South Dakota. Dry weather will continue as upper ridge builds across the Northern Plains. Will go with highs in the low to mid 80s, except for 70s across the Black Hills and portions of far southern SD. Upper ridge axis remains across the Northern Plains overnight.
Further southwest, convection is not expected given proximity to the upper ridge and comparatively higher mid-level heights.
1037 PM CDT FRI AUG 5 2016 Quiet weather is expected over the next 24 hours as a ridge of high pressure extends from the Canadian Prairies into the I-29 corridor. Lows overnight will be in the 50s with highs on Saturday will range from the upper 70s in the Missouri Valley as well as east of I29 to the lower 80s along and north of I-90 in southeast South Dakota.
1149 PM CDT FRI AUG 5 2016 Water vapor imagery shows monsoonal moisture continuing to advect north-northeast across the central Rockies and Plains as upper- level ridging remains anchored across the Southern Plains. A weak cold front that began to push through the area yesterday continues to slowly push across across south central and southeast Kansas.
1019 PM EDT FRI AUG 5 2016 A cold front will track across Pennsylvania Saturday morning.
930 PM EDT Fri Aug 5 2016 A cold front across southeastern Ontario and the eastern Great Lakes region will move eastward bringing scattered showers and a few thunderstorms to the North Country overnight.
715 PM EDT FRI AUG 5 2016 A cold front will track across Pennsylvania Saturday morning.
633 PM CDT FRI AUG 5 2016 Water vapor imagery shows monsoonal moisture continuing to advect north-northeast across the central Rockies and Plains as upper- level ridging remains anchored across the Southern Plains. A weak cold front that began to push through the area yesterday continues to slowly push across across south central and southeast Kansas.
Robust morning convective activity over the Phoenix area likely at least partially forced by a mesoscale short wave trough over southwestern AZ has continued northeastward through the day today.
541 PM MDT FRI AUG 5 2016 18Z water vapor imagery and RAP analysis indicated CWA on northern periphery of 594 dm ridge centered over Texas.
/00Z Update/ High pressure will remain in control.
739 PM EDT FRI AUG 5 2016 Cold front has cleared our CWA this afternoon. as the main upper level trough and secondary surface response slide into far Western Upper Michigan. Main upper level trough and surface response will swing thru our CWA tonight. Secondary trough sliding thru tonight may very well make up for loss of diurnal heating. NAM12 is the only short term model that tries to develop some scattered light rain showers across our SW CWA as the trough moves thru overnight. Will keep Saturday dry as well as high pressure/subsidence and drier air build into the region. Conditions will be noticeably cooler and less humid tonight and Saturday.
620 PM CDT FRI AUG 5 2016 Quiet weather is expected over the next 24 hours as a ridge of high pressure extends from the Canadian Prairies into the I-29 corridor. Lows overnight will be in the 50s with highs on Saturday will range from the upper 70s in the Missouri Valley as well as east of I29 to the lower 80s along and north of I-90 in southeast South Dakota.
751 PM EDT FRI AUG 5 2016 A cold front should bring showers and thunderstorms as it moves through the region overnight. All models do indicate an upswing in precipitation tonight as the pre-frontal trough advances across the region. Any precipitation tonight will vacate the region by late tonight, with fog possible after its end owing to the lingering, very moist airmass prior to cold frontal passage. The system's cold front will move through late tonight/early tomorrow morning, which will have only a slight impact on temperatures as cold advection in its wake will not be strong.
940 PM EDT FRI AUG 5 2016 A cold front will move south across the area tonight.
BMickelson Previous short term discussion: High pressure will maintain warm and dry conditions across northeast Montana for the remainder of this afternoon and evening while clear skies prevail into tonight as well. On Saturday the upper level ridge begins to slide away as a trough/closed low deepens downstream across the Pacific Northwest.
1243 AM EDT SAT AUG 6 2016 A ridge of high pressure will continue to weaken across the area. Low pressure across Canada will drag a cold front across the area through Saturday evening.
730 PM EDT FRI AUG 5 2016 A cold front will track across Pennsylvania Saturday morning.
657 PM CDT FRI AUG 5 2016 At 6 PM CDT a region of high pressure extended from southeast Saskatchewan through eastern South Dakota. A developing lee side low pressure area in Montana will bring increasing southeast winds to western North Dakota Saturday. High pressure will slowly slide off to the east tomorrow allowing for southerly return flow. This will bring slightly warmer temperatures in for Saturday and with an increase in the pressure gradient an increase in wind speeds as well.
1008 PM EDT FRI AUG 5 2016 A cold front will track across Pennsylvania Saturday morning.
827 PM EDT FRI AUG 5 2016 Cold front approaching tonight with increasing clouds and showers before dawn and thunder during the afternoon hours Saturday.
1256 AM EDT SAT AUG 6 2016 Aviation A less humid and slightly cooler air mass will drop over Southwest Michigan tonight.
the greatest chance for storms will be shifting southward with the cold front. Britt It appears that the cold front has just passed through COU and STL looking at their increased north-northwesterly surface winds along with the tighter surface dew point gradient across northern MO. Should continue to get more convective development, especially during the late afternoon and early evening hours across southeast MO and southwest IL as the cold front continues to drop slowly southward, possibly making it to near the AR border by 12Z Saturday.
758 PM EDT FRI AUG 5 2016 A cold front will move south across the area tonight.
1208 AM EDT SAT AUG 6 2016 A cold front will result in showers and a few isolated thunderstorms overnight followed by dry and less humid weather for the rest of the weekend. Scattered to numerous showers are expected to continue overnight ahead of an approaching cold front.
750 PM EDT FRI AUG 5 2016 A cold front arrive tonight with a few broken lines of showers and thunderstorms. Not every location will see rainfall overnight, but all will see cooler weather for the weekend.
Otherwise, the rest of the forecast remains on track, with overnight lows in the lower 70s.