Aikyam-Lab/Synoptic-Bench huggingface dataset:
THIS EVENING THROUGH SUNDAY NIGHT WATER VAPOR SHOWS UPPER RIDGE BREAKING DOWN SLIGHTLY THIS AFTN ACRS THE NRN PLAINS AS SHORT WAVES DIVES SEWD ACRS FAR SRN SASK.
HIGH PRESSURE CONTINUES TO DOMINATE ACROSS EASTERN KENTUCKY TONIGHT. THE GRADIENT CONTINUES TO LOOSEN AS LOW PRESSURE ACROSS THE GREAT LAKES MOVES EAST AND HIGH PRESSURE REBUILDS FROM THE SOUTH. THE ISSUE FOR TONIGHT IS HOW THE LOW LEVEL MOISTURE FROM MELTING SNOWPACK RESPONDS UNDERNEATH THE OVERNIGHT INVERSION. MEANING COOLER TEMPERATURES TONIGHT. MEAN WESTERN NORTH AMERICAN SPLIT FLOW TROUGH. AND/OR REINFORCES THE SOUTHERN STREAM PORTION OF THE MEAN TROUGH.
MOST LOCATIONS WILL SEE HIGHS IN THE LOWER 50S. A STRONG UPPER RIDGE WILL EXIST ALONG THE WEST COAST TO BEGIN THE PERIOD WITH A BROAD TROUGH IN PLACE OVER THE GREAT LAKES. AN UPPER LEVEL TROUGH WILL REMAIN STALLED FROM THE SRN HIGH PLAINS INTO NRN MEXICO.
AMPLE LOW LEVEL MOISTURE WITHIN THE LOW LEVEL NORTHEAST TO EAST FLOW TRAPPED BELOW A SUBSIDENCE INVERSION AROUND 840MB WILL CONTINUE TO SUPPORT CONSIDERABLE CLOUDINESS ACROSS THE ENTIRE FORECAST AREA THE REST OF TONIGHT WITH MOSTLY CLOUDY SKIES EXPECTED. AMPLE MOISTURE WITHIN THE LOW LEVEL NORTHEAST TO EASTERLY WIND FLOW WILL SUPPORT PREVAILING MVFR CEILINGS AT ALL TERMINAL SITES THE REST OF TONIGHT. HIGH PRESSURE REMAINS CENTERED NORTH OF THE WATERS OVER THE SOUTHEASTERN UNITED STATES THIS EVENING.
A WEAK UPPER LEVEL LOW WILL GENERATE A FEW LIGHT SHOWERS EARLY THIS EVENING AND AGAIN SUNDAY AFTERNOON FAR EASTERN AREAS. AS THE UPPER LOW CURRENTLY JUST WEST OF SASABE CONTINUES TO MOVE VERY SLOWLY EAST. THE UPPER LOW CONTINUES TO VERY SLOWLY SHIFT TO THE E-SE THE NEXT 24-36 HOURS BUT IT WILL BE SLOW ENOUGH THAT THERE IS A THREAT OF A REPEAT PERFORMANCE SUNDAY AFTERNOON ACROSS THE EASTERN MOST COUNTIES AND WILL TWEAK POPS UP A BIT THERE FOR TOMORROW AFTERNOON.
In fact, readings have reached the lower to middle 50s from Bloomington and Lincoln westward to the Mississippi River where most of the snow cover has melted. The cold front will sweep through the area this evening, turning the winds to the W/NW but bringing in only a slightly cooler airmass. Due to the cloud cover and a light SE flow, temperatures will be held down a bit, with readings in the lower to middle 40s.
THINK THE HIGHWAY 2 CORRIDOR WILL BE ON THE EDGE AGAIN. TEMPS SHOULD BE A LITTLE WARMER ON SUNDAY BUT WILL DEPEND ON CLOUD COVER.
616 PM EST SAT MAR 7 2015 HIGH PRESSURE WILL MOVE SOUTHEAST INTO THE OHIO VALLEY TONIGHT PROVIDING FAIR WEATHER ACROSS OUR AREA. LOW TEMPERATURES TONIGHT WILL BE IN THE LOWER TO MIDDLE 20S. WITH SOME BACKING OF SFC FLOW/RECOVER OF THERMAL FIELD BY AFTN AND LACK OF STRATUS HAVE LARGELY DISCARDED COLD NAM MOS TEMPS IN FAVOR OF WARMER/LATEST ECE.
654 PM EST SAT MAR 7 2015 A WEAK COLD FRONT WILL WASH OUT OVER THE REGION TONIGHT.
AND THE 00Z NAM SEEMS TO BE A BIT LESS BULLISH ON THE LOW-LEVEL MOISTURE. SO PUSHED BACK THE ONSET OF THE LOW CLOUDS AND FOG UNTIL 09Z. ESPECIALLY IF CONFIDENCE INCREASES IN THE LOW CLOUDS NOT DEVELOPING. WHICH HAVE BEEN WARMER THAN FORECAST IN GENERAL TODAY. WRLY WINDS 10-15 KTS JUST OFF THE SFC AND UNDER A PROMINENT INVERSION MAY STIR UP MOISTURE JUST ENOUGH TO AVOID DENSE FOG/FREEZING FOG AT THE SFC. AVAILABLE MOISTURE SHOULD INCREASE SIGNIFICANTLY MON NIGHT AS THE MID LEVEL FLOW TURNS SWRLY AHEAD OF THE NEXT LOW PRESSURE SYSTEM. A SLOW MOVING UPPER TROF WILL REACH THE SOUTHERN 1/2 OF THE PLAINS BY MID WEEK WITH SEPARATE NORTHERN STREAM FLOW ACROSS THE NORTHERN TIER OF STATES.
1000 PM MST SAT MAR 7 2015 BIG PICTURE IMAGERY HAS BASIC LW TROF ACROSS MOST OF THE CONUS EXCEPT FOR THE W CST WHERE A BLOCKING HIGH OVR LOW SITUATION EXISTS. LITTLE ACCUMULATION EXPECTED EVEN OVR THE HIGHER PEAKS. ABOUT THE MOST THAT CAN BE SAID ABOUT WX CHANGES FOR SUNDAY WILL BE A SLIGHTLY COOLER ATMOSPHERE WITH SFC TEMPS POSSIBLY A DEGREE OR TWO LOWER THAN TODAY. SUNDAY NIGHT THROUGH SATURDAY WARMER HIGH PRESSURE ALOFT WILL BE OVER THE WESTERN U.
HIGH PRESSURE CONTINUES TO SLOWLY WEAKEN ACROSS THE AREA THIS EVE. THIS CHILLY AREA OF HIGH PRESSURE WILL CONTINUE TO SLOWLY SLIP OFF THE COAST. THIS BOUNDARY DID KEEP THE BEACHES AND ADJACENT COMMUNITIES ABOUT 10 DEG COOLER THAN AREAS FURTHER INLAND THIS AFTERNOON. WE ARE NOT FORECASTING ANY OF OUR COMMUNITIES TO DROP TO THE FREEZING MARK. BERMUDA HIGH PRESSURE CHARACTERISTIC OF WARM SEASON WILL BE IN PLACE BOLSTERING HIGHS WELL INTO THE 60S AWAY FROM THE IMMEDIATE COAST. IN BETWEEN WILL BE VERY WEAK TROUGHINESS ACROSS THE WEST/CENTRAL CAROLINAS.
956 PM EST SAT MAR 7 2015 A WEAK COLD FRONT WILL WASH OUT OVER THE REGION LATE TONIGHT INTO SUNDAY MORNING.
THIS NORTHERLY SURGE WILL BE CAPABLE OF GENERATING NORTHERLY WINDS GUSTING TO AROUND 25 KNOTS AT TIMES OVER EASTERN SECTIONS FROM LATER TONIGHT INTO AT LEAST SUNDAY MORNING IN COMBINATION WITH COOLER MAXIMUM TEMPERATURES SUNDAY.
AND COOLER AIR WELL NORTH BEHIND WAVE. HAVE CUT BACK ON FREEZING DRIZZLE BASED ON CURRENT OBS AND UPSTREAM DEW POINTS. LEAVING ONLY IN THE RIDGES BEFORE DAYBREAK INTO EARLY SUNDAY.
THE NEW WEEK WILL START OUT WITH THE COOLEST MID LEVEL TEMPERATURES AND LOWEST HEIGHTS FOR THE FORECAST IN THE WAKE OF THE PASSING NORTHERN STREAM TROUGH.
620 PM EST SAT MAR 7 2015 HIGH PRESSURE DOMINATES.
913 PM MST SAT MAR 7 2015 A WEAK LOW PRESSURE SYSTEM WILL EXIT THE REGION LATE TONIGHT WITH SKIES GRADUALLY CLEARING FROM WEST TO EAST.
MID LEVEL SPLIT FLOW PATTERN CONTINUES TO DOMINATE WITH NW FLOW OVER THE NORTHERN CONUS AND TROFFINESS OVER THE EAST COAST. WILL SHIFT EAST TONIGHT BUT RIDGE AXIS WILL REMAIN ANCHORED ACROSS THE AREA. BAJA LOW LOOKS TO OPEN UP AND BEGIN MOVING EAST IN RESPONSE TO BUILDING RIDGE OVER THE WEST COAST. THIS SYSTEM LOOKS TO DIG SOUTH OVER MEXICO AS MID LEVEL RIDGE REMAINS FIRMLY ANCHORED OFF THE EAST FL COAST.
TEMPS HAVE HELP UP NICELY SO FAR THIS EVENING AND WITH THE HIGHER CLOUDS MOVING IN. SO EXPECTING HIGHS A LITTLE COOLER THAN TODAY.
The Lower Ohio Valley this afternoon is sandwiched between low pressure across the Great Lakes and high pressure along the Gulf Coast. Brisk south-southwesterly winds today have ushered in warmer air. This combined with the ample sunshine has resulted in temperatures warming into the lower to mid 40s across the region. Temperatures will fall to near or just below freezing. Tomorrow night looks to remain dry with lows in the lower to mid 30s expected.
MILD DAYS WITH CLEAR AND COOL NIGHTS EXPECTED THIS WEEKEND UNDER STRONG HIGH PRESSURE.
AND SLIGHTLY ELEVATED SOUTHERLY WINDS SHOULD KEEP TEMPS A BIT WARMER THAN ORIGINALLY ANTICIPATED TONIGHT THROUGH EARLY TOMORROW MORNING.
646 PM EST SAT MAR 7 2015 A RIDGE OF HIGH PRESSURE WILL DOMINATE OUR WEATHER THROUGH SUNDAY. HIGH PRESSURE WILL PERSIST OVER THE REGION TONIGHT WITH REASONABLE RADIATIONAL COOLING EXPECTED THROUGH A DRY AIRMASS. LOWS SHOULD BE A BIT WARMER TONIGHT THAN THIS MORNING DUE TO THE LOW LEVEL JET AND GENERAL MODIFICATION OF THE AIRMASS UNDER A FULL DAY OF SUNSHINE. THE AREA OF HIGH PRESSURE WILL BEGIN SHIFTING EASTWARD AND OFF THE CAROLINA COAST SUNDAY THROUGH SUNDAY NIGHT. EXPECT HIGH CLOUDS TO INCREASE THROUGH SUNDAY NIGHT AHEAD OF THE MAIN MID/UPPER LEVEL TROUGH ACROSS THE WESTERN PORTION OF THE COUNTRY. EXPECT HIGHS AROUND 70 WITH LOWS IN THE LOWER AND MIDDLE 40S.
WINDS ALOFT WILL PICK FROM THE S/SW IN RESPONSE TO THE APPROACHING UPPER LOW OVER BAJA.
THEN, ON THE SOUTHERN FLANK OF THIS REX BLOCK, THE UPPER LOW HAS INDUCED A SUBTROPICAL JET ACROSS NORTHERN MEXICO AND SOUTHERN PLAINS. 77 /ISSUED 309 PM CST SAT MAR 7 2015/ FOR TONIGHT, QUIET WEATHER WILL CONTINUE UNDER THE INFLUENCE OF SFC RIDGING AND VERY DRY SUBSIDENT PROFILE. AFTER DECOUPLING OCCURS OVERNIGHT, TEMPERATURES WILL BE QUICK TO DROP TO OR SLIGHTLY BELOW FREEZING BY MORNING AS DEWPOINTS RECOVER FROM THEIR LOWS EARLIER IN THE DAY. THE HIGH RES MODELS ARE SHOWING A GENERAL SLOWER SATURATION OF THE MID-LEVELS ON SUNDAY EVENING AND MADE SOME SLIGHT ADJUSTMENTS TO THE POPS/WX FOR THAT TIME FRAME.
WHICH HAVE BEEN WARMER THAN FORECAST IN GENERAL TODAY. WRLY WINDS 10-15 KTS JUST OFF THE SFC AND UNDER A PROMINENT INVERSION MAY STIR UP MOISTURE JUST ENOUGH TO AVOID DENSE FOG/FREEZING FOG AT THE SFC. AVAILABLE MOISTURE SHOULD INCREASE SIGNIFICANTLY MON NIGHT AS THE MID LEVEL FLOW TURNS SWRLY AHEAD OF THE NEXT LOW PRESSURE SYSTEM. A SLOW MOVING UPPER TROF WILL REACH THE SOUTHERN 1/2 OF THE PLAINS BY MID WEEK WITH SEPARATE NORTHERN STREAM FLOW ACROSS THE NORTHERN TIER OF STATES.
High pressure is in place across the region this evening with clear skies.
553 PM CST Sat Mar 7 2015 Overall pattern will be marked by northwest flow aloft from the Canadian Rockies through the Great Lakes with an upper trough evolving over the Southern Plains. Chewed through the low-level inversion and then began mixing down from the 800mb level.
THE CENTER OF HIGH PRESSURE WAS SITUATED RIGHT ALONG THE COAST. WE ARE NOT FORECASTING ANY OF OUR COMMUNITIES TO DROP TO THE FREEZING MARK. BERMUDA HIGH PRESSURE CHARACTERISTIC OF WARM SEASON WILL BE IN PLACE BOLSTERING HIGHS WELL INTO THE 60S AWAY FROM THE IMMEDIATE COAST. IN BETWEEN WILL BE VERY WEAK TROUGHINESS ACROSS THE WEST/CENTRAL CAROLINAS.
While temps are once again a few degrees warmer than guidance, dry advection was not as strong or deep with dewpoints hovering in the mid to upper 20s. For tonight, mid level moisture increases over southern Kansas as the southwest upper trough lifts north and shifts eastward through the southern plains on Sunday. Winds become light from the south as the sfc inverted trough axis passes through. Highs therefore are forecast a few degrees cooler in the lower 60s. The result are highs slightly cooler than previous days with highs in the upper 50s.
FORECAST AREA ENJOYING AMPLE SUNSHINE TODAY BEHIND A DEPARTING LOW PRESSURE SYSTEM OVER EASTERN ONTARIO. MODELS STILL HAVE A LOCK ON A MID- LEVEL TROUGH ROTATING THROUGH THE REGION. LOOK FOR LOWS TONIGHT IN THE UPPER TEENS TO THE LOWER 20S. A WEAK RIDGE OF HIGH PRESSURE DRIFTS SOUTHEAST ACROSS THE AREA SUNDAY NIGHT FOR MOSTLY CLEAR SKIES AND TEMPERATURES LOWERING INTO THE UPPER TEENS TO LOWER 20S.
MID LEVEL TEMPERATURES ARE MILD ENOUGH TO ALLOW SOME MELTING OF THE SNOW - AND POSSIBLE REFREEZING - AS IT FALLS TO THE SURFACE. FREEZING RAIN AND SNOW FOR AREAS ALONG AND NORTH OF A HURON TO SIOUX FALLS TO STORM LAKE LINE. A GREATER DEGREE OF SNOWFALL WILL BE POSSIBLE LATE TONIGHT AS THE LOW/MID LEVELS COOL. LIGHT RAIN WILL BE MOST LIKELY WITH A WARMER THERMAL PROFILE AND MUCH LIGHTER PRECIPITATION. THERE IS CONCERN OVER HOW MUCH OF AN IMPACT THE FREEZING RAIN WILL HAVE ON ROADS WITHIN THE MIXED PRECIPITATION ZONE. FREEZING RAIN FALLS.
644 PM EST SAT MAR 7 2015 A WEAK CLIPPER SYSTEM TRACKS ACROSS THE GREAT LAKES OVERNIGHT AND PUSHES IT'S WEAK COLD FRONT THROUGH OUR REGION EARLY SUNDAY FOLLOWED BY HIGH PRESSURE.
A WEAK COLD FRONT APPROACHING FROM THE NORTHEAST LAYS GENERALLY ALONG A LINE FROM SOUTH CENTRAL NEBRASKA TO JUST NORTH OF CHADRON TO A LOW CENTERED IN SOUTH CENTRAL MONTANA. WE SHOULD SEE SLIGHTLY COOLER TEMPERATURES WITH GUSTY NORTH WINDS SUNDAY.
830 PM PST SAT MAR 7 2015 HIGH PRESSURE WILL BEGIN TO WEAKEN ON SUNDAY WITH A RETURN ONSHORE FLOW.
AN UPPER TROUGH CURRENTLY OVER THE DESERT SOUTHWEST IS EXPECTED TO EVENTUALLY PHASE WITH A NORTHERN STREAM SYSTEM ACROSS THE CENTRAL/SOUTHERN PLAINS LATE WEEKEND INTO EARLY WEEK.
932 PM EST SAT MAR 7 2015 WEAK LOW PRESSURE WILL SLOWLY CROSS THE REGION TONIGHT THROUGH SUNDAY.
A LITTLE COOLER TEMPS WERE NOTED IN NORTHEAST NEBRASKA WHERE LOW LEVEL COOL ADVECTION WAS BEING REALIZED AS COOLER SUB-ZERO 850 AIR IN THE DAKOTAS WAS ADVECTING SOUTH THIS AFTERNOON. EXPECT SURFACE TEMPERATURES TO HOLD ABOVE FREEZING DURING TIME OF PRECIPITATION. SO NOT EXPECTING ANY FREEZING RAIN. THUS TEMPERATURES SHOULD BE COOLER THAN TODAY. THEN HIGH PRESSURE SETTLING OVER THE AREA SUNDAY NIGHT WILL ALLOW FOR TEMPS TO RADIATE BACK DOWN INTO THE 20S ALL AREAS.
PLEASANT CONDITIONS ARE PRESENT TODAY UNDER THIS RIDGE WITH CLEAR SKIES AND OVERALL LIGHT WINDS AND CLOSE TO NEAR NORMAL EARLY MARCH AFTERNOON TEMPERATURES AND A CLEAR RADAR. AS THE UPPER TROUGH DIGS OVER THE SOUTHWEST INTO NORTHERN MEXICO. ALLOWING FOR WARMER/MOIST AIR TO FILTER INTO THE REGION.
MEANWHILE, A CLOSED OFF UPPER LEVEL LOW IS SHIFTING SLOWLY EAST ACROSS BAJA CALIFORNIA. NEAR THE SURFACE, A LEE SIDE TROUGH OF LOW PRESSURE IS SLOWLY STRENGTHENING ACROSS EASTERN COLORADO. AS THE WAVE MOVES INTO THE CENTRAL PLAINS, A WEAK COLD FRONT WILL PUSH SOUTH THROUGH WESTERN KANSAS THROUGH MUCH OF SOUTHWEST KANSAS DURING THE DAY AND THROUGH SOUTH CENTRAL KANSAS SUNDAY AFTERNOON.
THE OVERALL FORCING WITH THIS SYSTEM IS EXPECTED TO BE RELATIVELY WEAK WITH MODEST WAA AND A THIN LAYER OF MID-LEVEL FGEN HELPING THE UPPER TROUGH PRODUCE ENOUGH LIFT FOR AROUND A HALF TO ONE INCH OF SNOW. THE HIGHER AMTS WILL BE MAINLY NORTH OF HIGHWAY 2. HIGH PRESSURE WILL BUILD IN QUICKLY BEHIND THE SYSTEM ON SUNDAY AFTERNOON ALONG WITH DRIER AIR.
MEANING COOLER TEMPERATURES TONIGHT. MEAN WESTERN NORTH AMERICAN SPLIT FLOW TROUGH. AND/OR REINFORCES THE SOUTHERN STREAM PORTION OF THE MEAN TROUGH.
SHARP AND DIGGING UPPER TROUGH FROM EARLIER IN THE WEEK AND PERSISTENT ACRS THE CENTRAL PORTIONS OF THE COUNTRY SINCE THE BEGINNING OF THE NEW YEAR.
/ISSUED 322 PM CST SAT MAR 7 2015/ AS A CLOSED LOW MOVES ACROSS THE SOUTHWESTERN US/NW MEXICO AND WEAKENS PRECIPITATION WILL COME IN TWO WAVES. THIS INITIAL AREA OF LIFT WILL COME OUT AHEAD OF THE TROUGH BUT IS NOT EXPECTED TO BE VERY STRONG. THE LOW LEVELS WILL STILL BE SLOW TO MOISTEN.
WATER VAPOR IMAGERY AND SATELLITE DATA INDICATED PLENTY OF DRY AIR ACROSS THE HIGH PLAINS REGION. A COLD FRONT WILL MOVE THROUGH THE TRI STATE AREA EARLY SUNDAY MORNING. WHICH IS EXPECTED TO BE DRY WITH THE LACK OF AVAILABLE MOISTURE AT THE LOWER LEVELS. THERE IS A PERIOD SUNDAY AFTERNOON WITH SOME BREEZY WINDS BEFORE THE SURFACE COOLS AND DECOUPLES WITH THE LOWER LEVEL JET. NORTH TO NORTHWEST WINDS WILL KEEP HIGH TEMPERATURES SLIGHTLY COOLER IN THE MID 50S TO LOW 60S. THIS IS BROUGHT ABOUT BY MEANDERING H5/H7 RIDGE THAT WORKS FROM THE WEST COAST INTO THE ROCKIES REGION. PLACEMENT OF THE TROUGH LATE WEEK HAS CHANGE WITH LATEST GFS/ECMWF. BUT THE AIRMASS DOES DRY OUT CONSIDERABLY IN THE TIME PRIOR TO TROUGH ARRIVAL.
ALTHOUGH EXPECT MORE CLOUDS OVER THE REGION AS RETURN FLOW ON THE WEST EDGE OF A RIDGE BECOMES BETTER ESTABLISHED JUST TO OUR WEST. THE HIGH PRESSURE RIDGE EXTENDING FROM EAST TO WEST ACROSS THE GULF COAST REGION IS REINFORCED ON SUNDAY. LOW TEMPERATURES TONIGHT ARE EXPECTED TO BE IN THE LOW TO MID 30S OVER THE INTERIOR TO IN THE UPPER 30S TO LOWER 40S CLOSER TO THE COAST (UPPER 40S ALONG BEACHES). HIGH TEMPERATURES WILL BE EVEN WARMER IN THE UPPER 60S AND LOWER 70S AREA WIDE.
LITTLE CHANGE IN THE OVERALL WX PATTERN AS THE RIDGE AXIS OVER THE DEEP SOUTH DRIFTS OFFSHORE AND SLOWLY WEAKENS OVER THE W ATLC WHILE KEEPING THE FRONTAL MOISTURE BAND SUPPRESSED OVER THE S FL PENINSULA.
SHORT TERM: (Through Late Tonight) Warm southwest flow has pushed temperatures into the low to mid 60s across most of the area along and west of the Mississippi today. A weak cold front will try to dip into the area tonight, but it looks like persistent low level west-southwest flow will mostly confine the front to parts of Illinois and northern Missouri. Regardless, it does look like temperatures will be a little cooler than last night's highs due to the lighter winds and better radiational cooling conditions. Still expecting a pattern shift during the beginning of the week as the trof currently over the Desert Southwest begins shifting east.
838 PM EST SAT MAR 7 2015 HIGH PRESSURE WILL MOVE SOUTHEAST INTO THE OHIO VALLEY TONIGHT PROVIDING FAIR WEATHER ACROSS OUR AREA. WITH SOME BACKING OF SFC FLOW/RECOVER OF THERMAL FIELD BY AFTN AND LACK OF STRATUS HAVE LARGELY DISCARDED COLD NAM MOS TEMPS IN FAVOR OF WARMER/LATEST ECE.
Clouds will increase on Sunday as the low moves into northern Mexico.
1150 PM EST SAT MAR 7 2015 A COLD FRONT WILL CROSS THE AREA TONIGHT AND WEAK LOW PRESSURE WILL TRACK ACROSS THE REGION SUNDAY.
THE 00Z SOUNDING INDICATED THE LOWER LEVELS ALMOST COMPLETELY SATURATED WITH THE PWAT ABOUT 1.
Cirrus streaming out of the desert SW trof has begun to overspread the sthrn CWA this evng. SHORT TERM: (Through Late Tonight) Warm southwest flow has pushed temperatures into the low to mid 60s across most of the area along and west of the Mississippi today. A weak cold front will try to dip into the area tonight, but it looks like persistent low level west-southwest flow will mostly confine the front to parts of Illinois and northern Missouri. Regardless, it does look like temperatures will be a little cooler than last night's highs due to the lighter winds and better radiational cooling conditions. Still expecting a pattern shift during the beginning of the week as the trof currently over the Desert Southwest begins shifting east.
1002 PM EST SAT MAR 7 2015 A RIDGE OF HIGH PRESSURE WILL DOMINATE OUR WEATHER THROUGH SUNDAY. BUT A WEAK LEE SIDE TROUGH TO OUR NORTH MAY KEEP WINDS UP A TAD MAINLY ACROSS THE NORTHERN FA. MIN TEMPS TONIGHT GENERALLY IN THE LOWER TO MID 30S LOOKS GOOD FOR MOST AREAS. THE AREA OF HIGH PRESSURE WILL BEGIN SHIFTING EASTWARD AND OFF THE CAROLINA COAST SUNDAY THROUGH SUNDAY NIGHT. EXPECT HIGH CLOUDS TO INCREASE THROUGH SUNDAY NIGHT AHEAD OF THE MAIN MID/UPPER LEVEL TROUGH ACROSS THE WESTERN PORTION OF THE COUNTRY. EXPECT HIGHS AROUND 70 WITH LOWS IN THE LOWER AND MIDDLE 40S.
THE MAIN AVIATION CONCERN WILL BE A COLD FRONT MOVING THROUGH THE PANHANDLES DURING THE LATE MORNING HOURS ON SUNDAY.
HIGH PRESSURE CONTINUE TO DOMINATE AREA WEATHER TONIGHT FOR MOSTLY CLEAR SKIES AND LIGHT WINDS.
HIGH PRESSURE AND OFFSHORE FLOW WILL BRING WELL ABOVE NORMAL TEMPERATURES INTO THE WEEKEND.
WHICH BASICALLY SET THE HIGH BAR ON THE MODEL SPREAD FOR HIGHS FOR THE SECOND DAY IN A ROW. WHICH IS AGAIN ON THE HIGH END OF THE MODEL SPECTRUM.
855 PM EST SAT MAR 7 2015 HIGH PRESSURE MOVES OFF THE COAST TONIGHT. A WEAK TROUGH OF LOW PRESSURE DROPS INTO THE AREA LATE SUNDAY.
DRY NORTHWEST FLOW ALOFT CONTINUES OVER THE FORECAST AREA TODAY STILL UNDER THE INFLUENCE OF THE BROAD UPPER TROUGH TO THE NORTHEAST. THE DEEP UPPER TROUGH TO THE NORTHEAST WILL LIFT OUT AS THE JET COLLAPSES.
735 PM EST SAT MAR 7 2015 HIGH PRESSURE CONTINUES TO DOMINATE ACROSS EASTERN KENTUCKY TONIGHT. THE GRADIENT CONTINUES TO LOOSEN AS LOW PRESSURE ACROSS THE GREAT LAKES MOVES EAST AND HIGH PRESSURE REBUILDS FROM THE SOUTH. THE ISSUE FOR TONIGHT IS HOW THE LOW LEVEL MOISTURE FROM MELTING SNOWPACK RESPONDS UNDERNEATH THE OVERNIGHT INVERSION. MEANING COOLER TEMPERATURES TONIGHT. MEAN WESTERN NORTH AMERICAN SPLIT FLOW TROUGH. AND/OR REINFORCES THE SOUTHERN STREAM PORTION OF THE MEAN TROUGH.
A WEAK LOW PRESSURE SYSTEM MOVING EAST ACROSS SOUTHERN ARIZONA WILL BRING A LITTLE INCREASING CLOUDINESS TO THE REGION TONIGHT AND TOMORROW. THOUGH THERE IS A SLIGHT CHANCE OF AN ISOLATED SHOWER OR THUNDERSTORM DEVELOPING OVER THE HIGHER TERRAIN OF GILA COUNTY THIS AFTERNOON.
EVENING SURFACE ANALYSIS DEPICTS HIGH PRESSURE (1028 MILLIBARS) COVERING THE DEEP SOUTH. AS OUR REGION FALLS BETWEEN STOUT RIDGING THAT COVERS THE SOUTHWEST ATLANTIC AND TROUGHING THAT IS DEPARTING THE NEW ENGLAND COAST.
AS THE PERSISTENT STRONG WEST COAST RIDGE DEAMPLIFIES AND SHIFTS INTO THE CENTRAL PART OF THE COUNTRY DURING THE MIDDLE PART OF THE WEEK. ALTHOUGH THE UPPER RIDGE ATTEMPTS TO REBUILD OVER THE SOUTHWEST U.
/ISSUED 355 PM CST Sat Mar 7 2015/ (Tonight and Sunday) An upper level low continues to spin over the northern Baja Peninsula this afternoon. This low will begin to move east across northern Mexico tonight through tomorrow. However, low level southerly flow will increase as the upper level low approaches, increasing moisture from the surface through 750/800mb. On that note, highs tomorrow may be a couple/few degrees cooler than today with more cloud cover and possible showers across the area.
ALL IN ALL A QUIET NIGHT WITH TEMPERATURES MAKING THEIR WAY TOWARD THE FREEZING MARK.
A WEAK AREA OF LOW PRESSURE IS EXPECTED TO FORM ALONG THIS FRONT AND PUSH TO THE NORTHEAST THROUGH THE DAY. AS THE LOW PUSHES NORTHEAST.
A COLD FRONT WILL STRENGTHEN AS IT SLOWLY MOVES SOUTHWARD ACROSS THE AREA TODAY. /ISSUED 351 AM CDT THU MAR 19 2015/ COLD FRONT EXPECTED TO PASS THROUGH FORECAST AREA TODAY.
CHATTANOOGA AIRPORT, TN 52 47 62 45 / 90 40 50 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 51 46 60 40 / 90 50 60 10 OAK RIDGE, TN 50 47 59 42 / 90 60 60 10 TRI CITIES AIRPORT, TN 48 43 57 39 / 90 90 70 10.
440 AM PDT THU MAR 19 2015 UPDATED AVIATION SECTION WEAK HIGH PRESSURE WILL BUILD OVER THE TODAY AND FRIDAY. COOLER AND BREEZY CONDITIONS ARE EXPECTED AS A COUPLE OF LOW PRESSURE SYSTEMS MOVE BY TO THE NORTH.
HIGH PRESSURE ALOFT WILL BUILD INTO THE GREAT BASIN THROUGH FRIDAY.
SATELLITE PICS AND RADAR LOOPS INDICATE THE UPPER LEVEL LOW IN NORTHWESTERN NORTH DAKOTA. THE UPPER LEVEL LOW/TROUGH IS FORECAST TO MOVE SOUTHEAST ACROSS THE STATE THIS MORNING. THE LINGERING LIGHT SNOW IN THE NORTH SHOULD BEGIN TO DECREASE/DISSIPATE FROM WEST TO EAST AS THE UPPER LEVEL LOW MOVES EAST. AS THE UPPER LEVEL TROUGH MOVES SOUTHEAST. AND MOMENTUM TRANSFER FROM AROUND H850 WILL ALLOW WEST/NORTHWEST WINDS TO INCREASE TO 15 TO 25 MPH IN THE SOUTHWEST AND SOUTH CENTRAL BEHIND THE LOW AS IT TRACKS EASTWARD TODAY. MID LEVEL S/WV TROUGHS AND UPPER LEVEL DYNAMICS WILL INTERACT WITH THE BOUNDARY TO BRING SEVERAL PERIODS OF PRECIPITATION TO THE REGION OVER THE NEXT SEVERAL DAYS.
925 AM PDT THU MAR 19 2015 WEAK HIGH PRESSURE WILL BUILD OVER SOUTHWEST CALIFORNIA TODAY AND FRIDAY. COOLER AND BREEZY CONDITIONS ARE EXPECTED AS A COUPLE OF LOW PRESSURE SYSTEMS MOVE BY TO THE NORTH. THE UPPER LOW THAT BROUGHT SHOWERS AND THUNDERSTORMS TO THE SOUTHEASTERN PORTION OF OUR FORECAST AREA HAS SHIFTED JUST ENOUGH SOUTH THAT IT SHOULD KEEP MOST, IF NOT ALL THE ACTION OUT OF OUR FORECAST AREA.
Better forcing aloft tonight will interact with another cold front pushing south across West Central Texas to continue the potential for thunderstorms.
A LOW PRESSURE SYSTEM MOVING ACROSS SOUTHERN ARIZONA WILL BRING SHOWERS AND ISOLATED THUNDERSTORMS TODAY FOCUSED MAINLY ACROSS CENTRAL ARIZONA OVER YAVAPAI COUNTY THE MOGOLLON RIM AND WHITE MOUNTAINS.
AN AREA OF LOW PRESSURE TO OUR SOUTH WILL SLOWLY PULL AWAY TO THE EAST TODAY GRADUALLY BRINGING AN END TO ANY SHOWERS AROUND IN THE MOJAVE DESERT BY EARLY THIS EVENING. CURRENT TEMPERATURES ARE RUNNING ABOUT 4 DEGREES BELOW THIS TIME YESTERDAY AND EXPECT TEMPERATURES TO BE A LITTLE COOLER THAN FORECAST.
A WEAK FRONTAL BOUNDARY CONTINUES TO MEANDER ACROSS SOUTHERN FLORIDA THIS MORNING WITH HIGH PRESSURE HOLDING OVER MUCH OF THE GULF OF MEXICO. HIGH PRESSURE EXPECTED TO HOLD ACROSS THE WATERS OVER THE NEXT FEW DAYS.
A COUPLE OF WEAK SHORT WAVES WILL SCOOT EAST ACROSS THE LOWER MS VALLEY DURING THE NEXT 24 HOURS.
IN THE LOW LEVELS OF THE ATMOSPHERE. A RIDGE OF HIGH PRESSURE WILL AMPLIFY OVER THE CENTRAL GULF OF MEXICO THIS AFTERNOON.
HIGHS TODAY WILL RANGE FROM THE LOWER 70S ACROSS SE GA.
CHANCES FOR RAIN TODAY ARE LOW BUT WILL INCREASE TONIGHT AS LOW PRESSURE MOVES ALONG THE FRONT AND THE FRONT MOVES INTO THE STATE AS A WARM FRONT. WHILE TEMPS START COOLER THAN NORMAL. THE LOW LEVEL MOISTURE WILL STAY OVER THE AREA TODAY. AS THE UPPER RIDGE WILL GRADUALLY BUILD INTO THE AREA AND HELP TEMPS WARM TODAY.
925 AM PDT Thu Mar 19 2015 Dry weather and well above normal temperatures today under high pressure. Cooler Friday and this weekend as a weak system clips the north state with a chance of precip north of Sacramento Friday night. High pressure ridge strengthens over our CWA today which will result in daytime highs being notably warm (about 10-15 degrees above normal). A Pacific frontal system off the Pacific Northwest coast is forecast to push coastward on Friday nudging the west coast ridge inland.
AN UPPER LEVEL TROUGH AND SURFACE WAVE RIDING EAST ACROSS THE SOUTHEASTERN STATES IS CREATING SOME MOIST CONDITIONS ACROSS THE GREAT VALLEY WITH AREAS OF LIGHT RAIN CURRENTLY ONGOING AT EACH OF THE TERMINALS IN THE VALLEY.
1013 AM EDT THU MAR 19 2015 WINDY AND COLD CONDITIONS WILL CONTINUE THIS MORNING WITH WINDS FINALLY EASING UP THIS AFTERNOON AS HIGH PRESSURE STARTS TO BUILD IN OVERHEAD.