Aikyam-Lab/Synoptic-Bench huggingface dataset:
/ISSUED 348 PM CDT FRI OCT 16 2015/ LATEST SURFACE OBSERVATIONS SHOWS THE COLD FRONT HAS PROGRESSED SOUTH THROUGH THE PANHANDLES AND DEEP INTO WEST TEXAS. BEHIND THE FRONT COOLER AND FAIRLY DRY EASTERLY SURFACE FLOW IS PRESENT. LOWS IN THE LOW-MID 40S SEEM PROBABLE. GENERALLY STRAYED AWAY FROM BIAS CORRECTED GUIDANCE AND NUDGED TOWARD THE COOLER STATISTICAL GUIDANCE. IF ANY STRATUS LINGERS EARLY IT SHOULD ERODE BY LATE MORNING OR MIDDAY AND NOT IMPACT THE HIGH TEMPERATURE FORECAST.
MID AND HIGH CLOUDS WERE MOVING INTO SE OREGON THIS EVENING AS AN UPPER LEVEL TROUGH MOVES IN FROM THE SOUTHWEST.
COLD FRONT HAS PUSHED THROUGH ALL TAF SITES EXCEPT HOUMA.
WATER VAPOR SHOWS A LARGE UPPER LOW APPROACHING THE PACIFIC NORTHWEST THIS EVENING.
750 PM EDT FRI OCT 16 2015 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING BRINGING THE COLDEST AIR MASS OF THE SEASON THUS FAR.
1137 PM CDT FRI OCT 16 2015 QUITE THE FALLISH PATTERN ACROSS THE UPPER MIDWEST/GREAT LAKES THIS EVENING WITH BROAD UPPER TROUGHING LAID OUT OVER THOSE AREAS. ALL WHILE LOW LEVEL RIDGING IS SPRAWLED NORTH-SOUTH JUST TO THE WEST OF THE MID/UPPER MISS RIVER VALLEY. AS THE RIDGE AXIS INCHES SLOWLY EASTWARD WITH TIME. AFTERNOON WATER VAPOR IMAGERY SHOWS A CLOSED LOW OVER HUDSON BAY WITH THE TROUGH EXTENDING DOMINATING THE EASTERN HALF OF THE CONUS. HIGH PRESSURE/COLD AIRMASS WILL REMAIN IN PLACE THROUGH SATURDAY NIGHT. PLAN ON HIGHS IN THE MIDDLE 40S TO THE LOWER 40S WITH LOWS SATURDAY NIGHT UNDER MOSTLY CLEAR SKIES DIPPING BACK INTO THE 20S AND LOWER 30S.
1241 AM EDT SAT OCT 17 2015 A SMALL AREA OF LOW PRESSURE WILL APPROACH LATE TONIGHT AND CROSS THE DOWNEAST REGION ON SATURDAY. THE LOW WILL CONTINUE EAST THROUGH THE MARITIMES SATURDAY NIGHT.
/ISSUED 920 PM CDT FRI OCT 16 2015/ COLD FRONT HUNG UP OVER THE SOUTHWESTERN CWA. POST-FRONTAL RESIDENT AIR MASS PROVIDING A COMFORTABLE AND SLIGHTLY COOLER AND DRIER NIGHT THAN 24 HOURS AGO. MOSTLY SUNNY START TO THE WEEKEND WITH A NEAR 10 KT NORTHEAST BREEZE ADVECTING IN SLIGHTLY COOLER AIR THAT WILL COUNTER FULL SUNSHINE WITHIN DRY AIR.
NOT MUCH DIFFICULTY FOR FLIGHT OPERATIONS THROUGH THE FORECAST PERIOD WITH MORE HIGH PRESSURE AND A SEEMINGLY NEVER ENDING FLOW OF BEAUTIFUL.
920 PM CDT FRI OCT 16 2015 COLD FRONT HUNG UP OVER THE SOUTHWESTERN CWA. POST-FRONTAL RESIDENT AIR MASS PROVIDING A COMFORTABLE AND SLIGHTLY COOLER AND DRIER NIGHT THAN 24 HOURS AGO. MOSTLY SUNNY START TO THE WEEKEND WITH A NEAR 10 KT NORTHEAST BREEZE ADVECTING IN SLIGHTLY COOLER AIR THAT WILL COUNTER FULL SUNSHINE WITHIN DRY AIR.
748 PM EDT FRI OCT 16 2015 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING BRINGING THE COLDEST AIR MASS OF THE SEASON THUS FAR.
908 PM EDT FRI OCT 16 2015 AN AMPLIFIED UPPER LEVEL TROUGH OVER EASTERN CANADA WILL DOMINATE THE REGIONAL WEATHER PATTERN THROUGH THE WEEKEND WITH TEMPERATURES AVERAGING BELOW NORMAL.
A CANADIAN COLD FRONT WILL ALSO MOVE SOUTH OVER NORTH CENTRAL MONTANA AFTER 09Z, SHIFTING WINDS THERE MORE NORTHERLY AND BRINGING WIDESPREAD MOUNTAIN OBSCURING MVFR TO IFR CEILINGS TO THE PLAINS.
244 PM EDT MON MAR 21 2016 HIGH PRESSURE BUILDS INTO THE AREA FROM THE WEST THIS AFTERNOON AND TONIGHT.
346 PM EDT MON MAR 21 2016 HIGH PRESSURE WILL BUILD IN FROM THE WEST OVERNIGHT.
A COLD FRONT SLIDING THROUGH THE AREA TOMORROW WILL COOL TEMPERATURES BACK DOWN TO SEASONAL NORMALS. HIGH PRESSURE WILL BRING LIGHTER WINDS AND GRADUAL WARMING THROUGH THE END OF THE WEEK. A TROUGH WILL CONTINUE TO MOVE IN AND DIG INTO THE GREAT BASIN TODAY. THERE IS ALSO SOME INDICATION THIS MAY JUMP BLUE DIAMOND RIDGE AND IMPACT THE WESTERN EDGE OF THE LAS VEGAS VALLEY AS WELL. GUSTY WINDS WILL ACCOMPANY THE COLD FRONT AS IT SWINGS WINDS TO THE NORTHWEST OR WEST FOR MUCH OF THE AREA TUESDAY MORNING.
144 PM EDT MON MAR 21 2016 HIGH PRESSURE WILL BUILD IN FROM THE WEST OVERNIGHT.
301 PM CDT MON MAR 21 2016 High pressure axis sliding eastward across the state this afternoon. The west-southwest wind flow will turn more southerly as the ridge axis shifts eastward. These winds will keep temperatures up quite a bit from last night, with lows generally in the lower 40s. Tightening pressure gradient over IL Tue with high pressure over the southeast states and low pressure deepening to near 990mb by sunset Tue near KS/CO border with warm front nearing the WI/IL border.
218 PM EDT MON MAR 21 2016 A PRESSURE RIDGE APPROACHING FROM THE WEST WILL EXTEND THROUGH THE FORECAST AREA LATE TONIGHT AND EARLY TUESDAY. THE RIDGE WILL SHIFT OFF THE COAST TUESDAY AFTERNOON. WARMER TEMPERATURES WILL OCCUR BEGINNING TUESDAY IN THE SOUTHERLY FLOW ON THE BACKSIDE OF THE HIGH.
STRONG RADIATIONAL COOLING WILL ALLOW TEMPERATURES TO DROP INTO THE LOWER 30S OVER EAST MISSISSIPPI. WAA WILL INCREASE TUESDAY NIGHT AHEAD OF A LOW PRESSURE SYSTEM THAT WILL BE DEEPENING OVER THE CENTRAL PLAINS.
THE UPPER RIDGE OVER THE STATE TODAY WILL BE MOVING EASTWARD TOMORROW CAUSING FLOW ALOFT TO BECOME SOUTHWESTERLY. THE LEADING EDGE OF MOISTURE WITH THE NEXT TROUGH WILL BE MOVING INTO THE MOUNTAINS.
AND A SLIGHT CHANCE OF LIGHT FREEZING RAIN OVER PARTS OF NORTHWEST AND NORTH CENTRAL ND LATE TONIGHT AND TUESDAY MORNING. A SURFACE WARM FRONT WAS PRESSING EASTWARD ACROSS SOUTHWESTERN ND AND WAS APPROACHING DICKINSON AND HETTINGER. A TREND WE HAVE NOTED WHICH MAY BECOME IMPORTANT TO THE FORECAST IS THAT THE SOUTHEAST WINDS ON THE COOLER SIDE OF THE WARM FRONT HAVE HELD UP STRONGER THAN EARLIER EXPECTED. WHICH MAY BE AN INDICATION THAT THE LOW- AND MID-LEVEL FRONT WILL STAY FURTHER SOUTH THAN WE HAVE BEEN EXPECTING. WE ARE CARRYING A LOW CHANCE OF LIGHT FREEZING RAIN OVER PARTS OF NORTHWEST AND NORTH CENTRAL ND LATE TONIGHT THROUGH EARLY TUESDAY MORNING AS WELL. TUESDAY WILL BE COOLER TOO ON EASTERLY LOW-LEVEL FLOW BEHIND THE FRONT.
TEMPERATURES SHOULD AGAIN BE IN THE LOW TO MID 30S FOR MOST OF THE MID STATE OVERNIGHT TONIGHT.
435 PM EDT MON MAR 21 2016 THE COLD FRONT CONTINUES TO SINK INTO THE FLORIDA STRAITS.
BUT THE WINDOW FOR ACCUMULATING SNOW AT THE LOWER ELEVATIONS FROM BILLINGS EASTWARD SEEMS SMALL AND MODELS ARE GENERALLY TRENDING DOWN ON SNOW AMOUNTS OUTSIDE THE FOOTHILLS. ROAD TEMPERATURES MAY REMAIN WARM ENOUGH THROUGH EARLY TUESDAY EVENING TO PREVENT SNOW OR SLUSH ACCUMULATION AT THE LOWER ELEVATIONS. PRESSURE FALLS AHEAD OF THIS SYSTEM WILL PULL A COLD FRONT IN FROM THE NORTH DURING THE LATE MORNING AND AFTERNOON SWITCHING WINDS TO N/NE.
Lows will drop into the lower to mid 30s inland with the normally colder locations possibly dropping to the freezing mark.
655 PM EDT MON MAR 21 2016 HIGH PRESSURE BUILDS INTO THE AREA FROM THE WEST TONIGHT INTO EARLY TUESDAY.
1232 PM CDT MON MAR 21 2016 FOR 18Z TAFS /ISSUED 1033 AM CDT MON MAR 21 2016/ CURRENT WATER VAPOR SHOWS THE UPPER TROUGH THAT WAS IMPACTING THE REGION THE LAST FEW DAYS WELL TO THE NORTHEAST WITH MUCH DRIER AIR FILTERING IN. AS HIGH PRESSURE SHIFTS TO THE SOUTHEAST OF THE TN VALLEY.
WITH THE HIGH OVERHEAD TONIGHT. WHICH WILL LEAD TO COOLER TEMPERATURES AND THE POTENTIAL FOR FROST. THE SHORT TERM PERIOD BEGINS WITH WEAK RIDGING ALOFT.
1205 PM MDT MON MAR 21 2016 SOUTHWEST WINDS WILL INCREASE ALOFT THIS MORNING AS A STRONG TROUGH MOVING ONSHORE THE PACIFIC NORTHWEST INTERACTS WITH THE RIDGE IN PLACE. CURRENT WATER VAPOR SATELLITE INDICATES A LONG FETCH OF MOISTURE GETTING WRAPPED INTO THE ONCOMING TROUGH AND ASSOCIATED UPPER LEVEL JET. CLOUDS WILL INCREASE AND THICKEN TONIGHT AHEAD OF THE ACCOMPANYING COLD FRONT AS VERTICAL SUPPORT INCREASES.
AN UPPER LEVEL TROUGH IS LOCATED OFFSHORE AND FRONT IS MOVING INLAND BRINGING RAIN AND MOUNTAIN SNOW. THE HIGH RESOLUTION HRRR SHOWS A BROAD AREA INLAND WITH A CHANCE FOR THUNDERSTORMS WITH THE BEST CHANCES IN SOUTHEAST PORTIONS OF THE CWA OVER SISKIYOU AND MODOC COUNTIES. SHOWERS WILL CONTINUE THIS EVENING THROUGH TUESDAY AFTERNOON AS THE UPPER TROUGH MOVES INLAND OVER THE REGION. A COLD FRONT WILL SWEEP ACROSS THE WEST SIDE THIS MORNING THEN THE EAST SIDE THIS AFTERNOON. SNOW IS EXPECTED AT LMT BY THIS EVENING AS SNOW AND FREEZING LEVELS LOWER BEHIND THE FRONT.
613 PM EDT MON MAR 21 2016 HIGH PRESSURE WILL SHIFT EAST OF THE AREA ON TUESDAY.
219 PM MST MON MAR 21 2016 HIGH PRESSURE OVER THE DESERT SOUTHWEST WILL RESULT IN MOSTLY CLEAR SKIES AND ABNORMALLY WARM WEATHER TODAY. A PACIFIC LOW PRESSURE SYSTEM MOVES INLAND TUESDAY. BRINGING COOLER TEMPERATURES. ONCE THE LOW PRESSURE SYSTEM MOVES EAST. SFC WINDS HAVE BEGUN TO INCREASE UPSTREAM ACROSS THE HIGHER ELEVATIONS OF AZ INDICATING THE FAST APPROACH OF THE LARGE PACIFIC LOW AND TROUGH HEIGHTS FROM THE WEST. MTN RIDGETOPS AND GAPS/PASSES WILL CONTINUE INTO THE EVENING TONIGHT AND EVENTUALLY MIX/EXPAND DOWNWARD INTO THE DESERT FLOORS FOR TOMORROW. BROAD AREA OF PACIFIC LOW PRESSURE.
A LARGE AREA OF HIGH PRESSURE CENTERED OVER THE SOUTHERN U.
AREA FORECAST DISSCUSSION 331 PM CDT MON MAR 21 2016 ONE MORE SHOT OF UNSEASONABLY COOLER TEMPERATURES EXPECTED AREA WIDE TONIGHT AS THE CENTER OF HIGH PRESSURE MOVES OVER THE REGION. EXPECT WINDS TO SHIFT BACK TO THE SOUTH ALLOWING FOR WARMER AND MORE HUMID CONDITIONS TO RETURN TO THE AREA IN ANTICIPATION OF THE NEXT STORM SYSTEM.
SO WE SPREAD OUR LOW CHANCE OF SHOWERS A BIT FURTHER SOUTH AND WEST TO THE HIGHWAY 2 CORRIDOR FROM WILLISTON TO MINOT THROUGH THE AFTERNOON. STILL A BIT OF SPREAD AMONGST THE 06-10 UTC HIGH RESOLUTION SUITES REGARDING HOW FAR SOUTH ALONG THE WARM FRONT ELEVATED SHOWER ACTIVITY WILL DEVELOP THIS AFTERNOON. UPPER LEVEL RIDGE AXIS IS APPROACHING THE WESTERN DAKOTAS EARLY THIS MORNING. UPPER LEVEL CLOUDS ORIGINATING FROM A PACIFIC NORTHWEST UPPER LEVEL TROUGH ARE STREAMING OVER THE RIDGE AND INTO OUR REGION. RIDGE BREAKS DOWN TODAY ALLOWING MID LEVEL S/WV IMPULSES TO TRACK FROM WEST TO EAST ACROSS THE NORTHERN PLAINS. LIGHT PRECIPITATION WILL BE ONGOING ACROSS NORTHERN NORTH DAKOTA TUESDAY NEAR A LOW LEVEL BAROCLINIC ZONE ON THE LEADING EDGE OF COOL HIGH PRESSURE ANCHORED OVER SOUTH CENTRAL CANADA.
EXPECT WINDS NEAR 3-8KTS OVERNIGHT WITH THE HIGHER WINDS ACROSS OUR NE TX TERMINAL LOCATIONS. /ISSUED 219 PM CDT MON MAR 21 2016/ HIGH PRESSURE QUICKLY EVACUATING TO THE EAST.
A LOW PRESSURE SYSTEM OFF THE WASHINGTON COAST WILL CONTINUE MOVING EAST. WEAK HIGH PRESSURE ALOFT WILL PREVAIL IN ITS WAKE.
312 PM EDT MON MAR 21 2016 HIGH PRESSURE BUILDS INTO THE AREA FROM THE WEST TONIGHT INTO EARLY TUESDAY.
338 PM CDT MON MAR 21 2016 THE CENTER OF AN OLD CANADIAN HIGH PRESSURE SYSTEM IS ON TOP OF THE FORECAST AREA THIS AFTERNOON. THIS HIGH WILL CONTINUE TO SLIDE OFF TO THE EAST TONIGHT WITH LIGHT SOUTH WINDS OFF THE GULF OF MEXICO GRADUALLY RETURNING.
THE CENTER OF HIGH PRESSURE ADVANCING ACROSS THE FORECAST AREA TODAY WILL MAINTAIN LIGHT AND VARIABLE WINDS. A STRONGER SOUTHERLY FLOW WILL DEVELOP TUESDAY BETWEEN THE HIGH EXITING TO THE EAST AND LOW PRESSURE DROPPING INTO THE PLAINS. HIGH PRESSURE CONTINUES TO SETTLE OVER THE REGION THIS MORNING WITH TEMPS RUNNING 5 TO 10 DEGREES BELOW SEASONAL NORMS. TODAY THE RIDGE WILL SHIFT TO THE EAST OF THE REGION WHICH WILL ALLOW WINDS TO BECOME SOUTHERLY.
SOUTHWEST WINDS WILL INCREASE ALOFT THIS MORNING AS A STRONG TROUGH MOVING ONSHORE THE PACIFIC NORTHWEST INTERACTS WITH THE RIDGE IN PLACE. CURRENT WATER VAPOR SATELLITE INDICATES A LONG FETCH OF MOISTURE GETTING WRAPPED INTO THE ONCOMING TROUGH AND ASSOCIATED UPPER LEVEL JET. CLOUDS WILL INCREASE AND THICKEN TONIGHT AHEAD OF THE ACCOMPANYING COLD FRONT AS VERTICAL SUPPORT INCREASES.
TEMPERATURES WILL WARM THROUGH THE MIDDLE OF THE WEEK AS A BROAD UPPER RIDGE EXPANDS ACROSS THE OHIO VALLEY AND SOUTHWEST WINDS STRENGTHEN.
350 PM EDT MON MAR 21 2016 HIGH PRESSURE WILL SHIFT EAST OF THE AREA ON TUESDAY.
A COLD SHOWERY PATTERN WILL REMAIN IN PLACE TODAY THROUGH TUESDAY AS AN UPPER TROUGH MOVES INLAND AND BRINGS SCATTERED TO WIDESPREAD SHOWER ACTIVITY TO THE AREA.
335 PM CDT MON MAR 21 2016 SURFACE ANALYSIS THIS AFTERNOON HAS HIGH PRESSURE OVER THE NW GULF OF MEXICO WITH LIGHT SOUTHERLY WINDS ACROSS THE AREA. WATER VAPOR IMAGERY SHOWS SOME WEAK RIDGING ALOFT IN WAKE OF THE DOWNSTREAM TROUGH AXIS.
340 PM EDT MON MAR 21 2016 HIGH PRESSURE WILL REMAIN CENTERED SOUTH OF THE OHIO VALLEY THROUGH THE FIRST HALF OF THE WEEK.
A LONG WAVE TROUGH HAS SCOURED LOWER HEIGHTS DEEP INTO THE EASTERN UNITED STATES AND THE NORTHERN GULF OF MEXICO. A RIDGE AXIS REACHES NORTH INTO THE CANADIAN PRAIRIES. A NOR'EASTER IS EAST OF MAINE WITH A TRAILING COLD FRONT DEGRADING EAST OF THE BAHAMAS. HIGH PRESSURE IS CENTERED NEAR THE TEXAS GULF COAST. WITH AREAS OF SEA SPRAY READILY APPARENT ON THE LOWEST TILT OF THE RADAR.
201 PM PDT MON MAR 21 2016 A WEAK PACIFIC STORM SYSTEM WILL BRING COOLER TEMPERATURES AND A CHANCE OF PRECIPITATION WITH INCREASED WINDS TONIGHT THROUGH TUESDAY. HIGH PRESSURE WILL BRING DRY WEATHER AND A WARMING TREND THROUGH THE REMAINDER OF THE WEEK.
The big weather impact to talk about today is the approach of a slow moving weather disturbance that will produce mountain snow and healthy amounts of precipitation to the lower valleys. The lowest valleys will be limited to the grassy areas.
136 PM EDT MON MAR 21 2016 A PRESSURE RIDGE APPROACHING FROM THE WEST WILL EXTEND THROUGH THE FORECAST AREA LATE TONIGHT AND EARLY TUESDAY. THE RIDGE WILL SHIFT OFF THE COAST TUESDAY AFTERNOON. WARMER TEMPERATURES WILL OCCUR BEGINNING TUESDAY IN THE SOUTHERLY FLOW ON THE BACKSIDE OF THE HIGH. THE NEXT LOW PRESSURE SYSTEM WILL APPROACH THE REGION LATE IN THE WEEK WITH CHANCES OF SHOWERS INTO THE WEEKEND. A PRESSURE RIDGE APPROACHING FROM THE WEST WILL EXTEND THROUGH THE FORECAST AREA LATE TONIGHT. WINDS WILL DIMINISH AROUND SUNSET AS THE PRESSURE GRADIENT RELAXES CLOSER TO THE RIDGE AXIS AND MIXING DIMINISHES WITH THE LOSS OF HEATING. HIGH PRESSURE WILL DOMINATE THE REGION THROUGH THE SHORT TERM WITH DRY AIR KEEPING SKIES MOSTLY CLEAR.
At 12z Monday a 500mb ridge axis extended from the Four Corners Region to Alberta. An upper level trough/low was located off the coast of the Pacific Northwest. Along the lee of the Rockies a trough of low pressure extended from eastern Montana to eastern Colorado. 850mb temperatures along this trough axis ranged from +10C to +14C. A strong upper level ridge extended from Alberta/Saskatchewan into the central Rockies early this morning. Short range models continue to show this ridge spread eastward through today and tonight and flattening out with time. A broad trough of low pressure at the surface will continue to slowly deepen from the western Dakotas into eastern Colorado through tonight. This will result in even warmer overnight lows generally in the 40s by Tuesday morning.
A COLD FRONT CONTINUES TO MOVE TOWARDS THE AREA BRINGING SHOWERS TO THE NORTH BAY AREA THIS MORNING. THE CURRENT SATELLITE WATER VAPOUR IMAGE IS SHOWING A WEAK COLD FRONT SLIDING ACROSS NORTHERN CALIFORNIA THIS MORNING. SHOWERS ARE ANTICIPATED TO LINGER AROUND THE AREA ON TUESDAY AS HIGH PRESSURE BUILDS OVER THE WEST COAST. OTHERWISE THE REMAINDER OF THE WEEK LOOKS DRY AS THE RIDGE OF HIGH PRESSURE CONTINUES TO BUILD OVER THE WEST COAST. MAIN ISSUE REMAINS A WEAK COLD FRONT THAT WILL GO THROUGH OUR AREA TODAY. KSFO BRIDGE APPROACH. A COLD FRONT WILL BRING SHOWERS AND POSSIBLY A FEW THUNDERSTORMS TO OUR WATERS TODAY.
TEMPS TONIGHT WILL REMAIN ABOVE FREEZING AND TOMORROW WILL RANGE FROM THE MID 50S TOWARD SHEBOYGAN TO AROUND 60 IN SOUTHWEST WI.
A COLD FRONT CONTINUES TO MOVE ACROSS THE AREA THIS AFTERNOON BRINGING SHOWERS TO THE BAY AREA. THE CURRENT VISIBLE SATELLITE IMAGE CONTINUES TO SHOW A WEAK COLD FRONT PASSING OVER THE FORECAST AREA WITH THE PARENT STORM PUSHING INTO THE PACIFIC NORTHWEST. OTHERWISE THE REMAINDER OF THE WEEK LOOKS DRY AS A RIDGE OF HIGH PRESSURE CONTINUES TO BUILD OVER THE WEST COAST. MAIN ISSUE REMAINS A WEAK COLD FRONT THAT WILL GO THROUGH OUR AREA TODAY. KSFO BRIDGE APPROACH. A COLD FRONT WILL BRING SHOWERS AND POSSIBLY A FEW THUNDERSTORMS TO OUR WATERS TODAY.
243 PM CDT MON MAR 21 2016 A cool and breezy day is underway this afternoon, with early afternoon temperatures in the low to mid 50s.
219 PM CDT MON MAR 21 2016 HIGH PRESSURE QUICKLY EVACUATING TO THE EAST.
HIGH PRESSURE OVER THE DESERT SOUTHWEST WILL RESULT IN MOSTLY CLEAR SKIES AND ABNORMALLY WARM WEATHER TODAY. A PACIFIC LOW PRESSURE SYSTEM MOVES INLAND TUESDAY. BRINGING COOLER TEMPERATURES. ONCE THE LOW PRESSURE SYSTEM MOVES EAST. SFC WINDS HAVE BEGUN TO INCREASE UPSTREAM ACROSS THE HIGHER ELEVATIONS OF AZ INDICATING THE FAST APPROACH OF THE LARGE PACIFIC LOW AND TROUGH HEIGHTS FROM THE WEST. MTN RIDGETOPS AND GAPS/PASSES WILL CONTINUE INTO THE EVENING TONIGHT AND EVENTUALLY MIX/EXPAND DOWNWARD INTO THE DESERT FLOORS FOR TOMORROW. BROAD AREA OF PACIFIC LOW PRESSURE.
THERE ARE A FEW SPOTS IN THE SOUTHWEST THAT MAY NOT REACH FREEZING HOWEVER FROST WILL STILL BE AN ISSUE WHERE IT DOES NOT REACH FREEZING.
1209 PM CDT MON MAR 21 2016 An upper-level ridge over the Rockies as depicted on water vapor imagery will begin to flatten as it enters the Central Plains early this week. This will allow for much warmer temperatures to build into the local area compared to the unseasonably cool temperatures over the past weekend.
134 PM MDT MON MAR 21 2016 A RIDGE WILL BE OVER THE PLAINS TONIGHT AND THEN SHIFT EAST TUESDAY AHEAD OF A TROUGH MOVING INTO THE ROCKIES.
648 PM EDT MON MAR 21 2016 AVIATION HIGH PRESSURE WILL CONTINUE TO BRING FAIR AND COOL WEATHER TONIGHT.
248 PM EDT MON MAR 21 2016 HIGH PRESSURE PASSES SOUTH THROUGH MID WEEK WHILE A FRONT REMAINS NEARLY STATIONARY TO THE NORTH. LOW PRESSURE IMPACTS THE REGION THE SECOND HALF OF THE WEEK. THIS KEEPS THE CWA ON THE NORTHERN PERIPHERY OF THE HIGH. AS THE HIGH PROGRESSES EAST. A FRONTAL BOUNDARY ASSOCIATED WITH LOW PRESSURE BACK OVER THE CENTRAL US WILL SLOWLY DIP SOUTH ACROSS THE GREAT LAKES REGION.
232 PM EDT MON MAR 21 2016 VFR IS EXPECTED FOR THE NEXT 24 HOURS WITH HIGH PRESSURE IN PLACE. /ISSUED 1054 AM EDT MON MAR 21 2016/ HIGH PRESSURE IS BUILDING INTO THE AREA TODAY AS THE UPPER TROUGH SWINGS THROUGH THE AREA. THE COOLER AND MUCH DRIER AIRMASS CONTINUES MOVING INTO THE AREA.
430 PM MDT MON MAR 21 2016 A RIDGE WILL BE OVER THE PLAINS TONIGHT AND THEN SHIFT EAST TUESDAY AHEAD OF A TROUGH MOVING INTO THE ROCKIES.
422 PM EDT MON MAR 21 2016 HIGH PRESSURE OVER THE REGION WILL MOVE OFF THE EAST COAST ON TUESDAY. A WARM FRONT WILL LIFT NORTH ACROSS LAKE ERIE ON TUESDAY THEN BECOME STATIONARY THROUGH MID-WEEK.
PUSHING THE COLD FRONT THAT CROSSED OUR FORECAST AREA LAST NIGHT FURTHER DOWN INTO MISSOURI. BUT OTHERWISE DRY AND COOLER WEATHER IS ANTICIPATED OVERNIGHT AND THE FORECAST REMAINS ON TRACK. ALONG WITH WINDS GOING NEARLY CALM AS THE HIGH PRESSURE AREA APPROACHES PARTICULARLY IN OUR NORTHERN COUNTIES. CURRENT NRN CONUS MEAN TROUGH WILL SLOWLY EVOLVE AND AMPLIFY WITH TIME. THIS WILL BRING IN A COOLER AND DRIER AIRMASS. PRECIP SHOULD DIMINISH LATE THU NIGHT LEADING TO A PROLONGED PERIOD OF DRY WEATHER AND COOLER TEMPERATURES AS FLOW AMPLIFIES. THIS WILL BRING A DECIDEDLY COOLER AIRMASS IN SHARP CONTRAST TO THE END OF LAST WEEK.
AS FOR TODAY THE MAIN UPPER LOW CONTINUES TO SPIN OVER CENTRAL MANITOBA. THE MAIN EFFECT FOR THIS AREA IS COOLER TEMPS ALOFT.
THIS LOWER CONFIDENCE GOING FORWARD INTO TONIGHT. INCLUDED PATCHY FOG IN THE FORECAST FOR SOUTHWEST NEBRASKA AS THE LOW LEVEL MOISTURE CREEPS NORTHWARD IN THE SOUTHERLY FLOW. UPPER LEVEL TROUGH AXIS SLOWLY SHIFTS EAST WEDNESDAY AS THE PATTERN BEGINS TO AMPLIFY DUE TO A RIDGE BUILDING UP THE PACIFIC COAST. AND A WEAK PACIFIC COLD FRONT APPROACHES THE CWA FROM THE NORTHWEST. A CHANCE FOR SHOWERS AND THUNDERSTORMS WEDNESDAY NIGHT AHEAD OF AN ADVANCING COLD FRONT.
948 PM EDT TUE SEP 8 2015 AN INLAND WEDGE OF HIGH PRESSURE WILL DISSIPATE TONIGHT.
THE SHEAR ZONE/TROUGH/UPPER LOW ROTATING OVER THE NORTH CENTRAL GULF WILL PROVIDE THE LARGE SCALE LIFT. SE TEXAS WAS BETWEEN A DEEP LAYER LOW PRESSURE LOCATED NEAR THE SE LA COAST AND AN UPPER HIGH PRESSURE AREA LOCATED NEAR FAR WEST TX. OVER THE NEXT FEW DAYS THE UPPER LOW OVER THE GULF WILL SHEAR OUT AS THE RIDGE OUT WEST WEAKENS SLIGHTLY AND A WESTERLY TROUGH DEEPENS INTO THE GULF UPPER LEVEL SYSTEM.
A COLD FRONTAL BOUNDARY EXTENDED ACROSS SOUTHWEST SASKATCHEWAN. THE NORTHERN PLAINS REMAINS ON THE SOUTHERN EDGE OF A LARGE UPPER LOW ACROSS NORTHERN MANITOBA. WEAK HIGH PRESSURE ACROSS WESTERN AND CENTRAL NORTH DAKOTA SOUTH OF THE FILLING NORTHERN MANITOBA LOW WILL CONTINUE TO WEAKEN THROUGH THE NIGHT.
THE WEAK COLD FRONT IS PROGGED BY THE MODELS TO MOVE ACROSS THE TAF SITES BETWEEN THE 18Z-19Z TIME PERIOD.
THE UPPER TROUGH WILL HOLD STRONG THROUGH THE SHORT TERM KEEPING HIGHS RIGHT AROUND OR SLIGHTLY BELOW CLIMO AVERAGES. AN AREA OF LOW PRESSURE WILL MOVE ACROSS THE REGION WEDNESDAY. A WARM FRONT WILL NUDGE OUR SOUTHERN CWA THOUGH MODELS STILL DIFFER GREATLY WITH REGARDS TO PRECIP CHANCES WITH THIS SYSTEM.
The cold front is still situated to our north and it will take a good deal of time to move into the area. Surface cold front was located from western OK into southeast KS into northwest MO. Rain should end from northwest to southeast during the day Wednesday as the upper level trough pushes to the southeast.
ONGOING SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A COLD FRONT ARE EXPECTED TO PROGRESS SOUTHWARD THROUGH THE NEXT FEW HOURS. THE RAIN CHANCES WILL SHIFT SOUTH ACROSS THE FA TONIGHT INTO WEDNESDAY AS A COLD FRONT MOVES ACROSS THE REGION.
OTHERWISE ADJUSTED THE CLOUDS TO MATCH CLEARING TRENDS AND LOWERED THE LOWS TONIGHT. 12Z UA ANALYSIS HAS A SEASONABLY STRONG TROF RUNNING FROM THE ARROWHEAD OF MINNESOTA INTO SOUTHWEST KANSAS. AN 850MB COLD FRONT RAN FROM NORTHWEST MINNESOTA INTO NORTHWEST NEBRASKA. CLEARING OF THE LOW CLOUDS HAS OCCURRED ACROSS MUCH OF IOWA WITH A MORE PRONOUNCED CLEARING FROM MINNESOTA INTO THE DAKOTAS. THE MAIN FRONT RAN FROM THE LOW INTO CENTRAL KANSAS WITH A PRE-FRONTAL TROF FROM SOUTHEAST WISCONSIN INTO NORTHEAST MISSOURI. COOLER AND MUCH LESS HUMID CONDITIONS WILL BE SEEN ON WEDNESDAY AS COOL CANADIAN HIGH PRESSURE MOVES THROUGH THE MIDWEST. A WEAK PROGRESSIVE HIGH PRESSURE CENTER WILL SWEEP THROUGH IN ADVANCE OF THE NEXT COLD FRONT. THIS SHOULD RESULT IN LOWS IN THE LOWER 50S NORTHEAST.
1025 PM EDT TUE SEP 8 2015 WEAK LOW PRESSURE SYSTEM ROTATING NORTHWARD ON THE WESTERN EDGE OF THE FORECAST AREA CONTINUES TO BE THE MAJOR PLAYER FOR OUR WX TONIGHT. HOWEVER WITH THE APPROACH OF THE COLD FRONT TOWARD LATE WEDNESDAY NIGHT.
/ISSUED 640 PM CDT TUE SEP 8 2015/ COLD FRONT HAS CLEARED ALL OF FORECAST AREA. /ISSUED 242 PM CDT TUE SEP 8 2015/ LATEST SURFACE OBS SHOWS THE COLD FRONT EXTENDING FROM JUST NORTH OF WHEELER SOUTHWESTWARD TO NEAR CLAUDE. POST FRONTAL ENVIRONMENT WILL BE COOLER BUT ONLY SLIGHTLY BELOW NORMAL VALUES FOR EARLY TO MID SEPTEMBER.
749 PM EDT TUE SEP 8 2015 HIGH PRESSURE THAT BROUGHT US THIS RECENT STRONG OF DRY AND VERY WARM DAYS WILL DRIFT OFF THE EAST COAST. ALLOWING A COLD FRONT TO MOVE SLOWLY EAST ACROSS THE REGION WEDNESDAY AFTERNOON AND NIGHT.
The main aviation concern for the next 24 hours is timing of TSRA affecting terminals through Wednesday as a cold front sags south into the region. /issued 245 PM CDT TUE SEP 8 2015/ Convection is currently developing in the higher elevations west of the Pecos River, and to our north along a weak front that is currently located near Lubbock.
AN UPPER LEVEL RIDGE WILL BEGIN BUILDING OVER THE PACIFIC NORTHWEST ON WEDNESDAY. BRINGING MOSTLY SUNNY AND WARMER THAN NORMAL WEATHER THROUGH THIS WEEKEND. WEDNESDAY MORNING A BROAD UPPER LEVEL LONGWAVE RIDGE WILL BEGIN AMPLIFYING OFFSHORE.
The higher res data will be highly relied upon through tonight, blending toward both model sets Wednesday into Wednesday night. Evolving upper trof over the MS valley by 12z Wednesday with a front just off to our NW, will move SE through the day. Meanwhile, there should be a modest "wall" tonight as wvapor shows persistent drier air over west KY into southern IN on the N/NW periphery of the upper low over the gulf region.
AN UPPER LOW LOCATED NEAR COASTAL LOUISIANA DRIFTS INTO THE NORTHWESTERN GULF AND BEGINS TO BE ABSORBED BY A BROAD LONGWAVE TROF ADVANCING ACROSS THE CENTRAL STATES.
A DRY POST-FRONTAL REGIME IS ANTICIPATED ON WED WITH SEASONABLE HIGHS IN THE LOW AND MID 80S.
826 PM EDT TUE SEP 8 2015 HIGH PRESSURE THAT BROUGHT US THIS RECENT STRING OF DRY AND VERY WARM DAYS WILL DRIFT OFF THE EAST COAST. A COLD FRONT WILL MOVE SLOWLY EAST ACROSS THE REGION WEDNESDAY AFTERNOON AND NIGHT.