Aikyam-Lab/Synoptic-Bench huggingface dataset:
WATER VAPOR IMAGERY SHOWS A DECENT AXIS OF MOISTURE IS TRAPPED IN THIS UA RIDGE FROM THE MEXICAN PLATEAU NWD TO THE FOUR CORNERS WHICH SHOULD SUPPORT DIURNALLY DRIVEN STORMS THERE LATER TODAY. EXPECT TO SEE SOME HIGH CLOUDS LOCALLY AS THE RIDGE MOVES OVERHEAD TONIGHT AHEAD OF DEEPER SW FLOW WITH MUCH GREATER THICKNESSES FOR THE WEEKEND. RIDGE WILL MOVE OVERHEAD EARLY SATURDAY THEN WE TRANSITION BACK TO ZONAL FLOW ALOFT BY LATE IN THE DAY.
THE CLOSED LOW PRESSURE WILL CONTINUE TO MOVE TOWARD SOUTHERN OREGON COAST TODAY. THE LOW PRESSURE WILL CONTINUE TO SEND A SERIES OF SHORT WAVE DISTURBANCE INLAND AND THIS WILL LEAD TO PERIODS OF RAIN THROUGHOUT THE DAY. THE ATMOSPHERE STABILIZES SLIGHTLY LATE THIS MORNING AS THE SHORT WAVE TROUGHS ROTATE OUT OF THE AREA BUT BY MID AFTERNOON WE EXPECT UNSTABLE CONDITIONS TO RETURN ESPECIALLY ALONG THE CASCADES. THE LOW PRESSURE WILL ALSO BE MOVING OVERHEAD OVER OUR FORECAST AREA THIS AFTERNOON AND EVENING. SHOWERS COULD DECREASE ON SATURDAY AS A SHORT WAVE RIDGE MOVES OVERHEAD.
THIS IS DUE TO AN UPPER LEVEL LOW MOVING INLAND WELL TO OUR SOUTH AND A SECOND STRONGER SYSTEM MOVING INTO CALIFORNIA.
AN UPPER TROUGH EXTENDS FROM THE GREAT LAKES INTO THE LOWER MISSISSIPPI VALLEY WHILE A COLD FRONT STRETCHES FROM WEST TENNESSEE INTO NORTHWEST MISSISSIPPI. DRIER AND COOLER AIR IS WORKING INTO AREAS BEHIND THE FRONT ON LIGHT NORTHWEST WINDS. DEWPOINTS HAVE DROPPED INTO THE UPPER 40S AT WALNUT RIDGE. TEMPS AT 4 AM CDT RANGE FROM THE UPPER 50S OVER NORTHEAST ARKANSAS AND NORTHWEST TENNESSEE TO THE LOWER 60S EAST OF THE MISSISSIPPI RIVER. COLD FRONT FRONT AND UPPER TROUGH WILL PUSH EAST OF THE REGION THIS MORNING. SURFACE AND UPPER LEVEL HIGH PRESSURE WILL BEGIN BUILDING INTO THE REGION AND REMAIN THROUGH THE WEEKEND. EXPECT DEWPOINTS IN THE LOWER 50S THROUGH THE WEEKEND.
HIGHS TODAY WILL BE IN THE LOW TO MID 60S. EXCEPT COOLER NEAR LAKE MICHIGAN. A WEAK UPPER LOW WAS OVER NORTHEAST ILLINOIS AND WILL DRIFT EAST OVER THE AREA TODAY. A COLD FRONT WILL THEN MOVE ACROSS THE AREA BEHIND THIS SYSTEM. ESPECIALLY OVER FAR NORTHERN INDIANA INTO FAR SOUTHERN LOWER MICHIGAN AS COOLER AND MUCH DRIER AIR SPREADS INTO THE AREA. SHORT WAVE RIDGING WILL BE ACROSS THE AREA THIS WEEKEND PROVIDING ANOTHER VERY NICE WEEKEND FOR THE MOST PART.
324 AM EDT FRI APR 22 2016 LOW PRESSURE WILL BRING INCREASING SHOWER CHANCES THROUGH FRIDAY. UPPER-LEVEL TROUGH NEARS THE OHIO RIVER BY FRIDAY AFTERNOON WITH INCREASING JET SUPPORT ALOFT OUT AHEAD OF IT. RIDGING THEN BUILDS IN THROUGH THE REMAINDER OF THE SHORT TERM PERIOD WITH THE BAROCLINIC ZONE SOUTH OF THE HUDSON BAY LOW FAVORED TO REMAIN WELL TO OUR NORTH.
AN UPPER TROF OVER THE EASTERN STATES. EXTENDING FROM THE LOWER MISSISSIPPI RIVER VALLEY TO THE GREAT LAKES. 2 INCHES AS THE MID/UPPER TROF ADVANCES ACROSS THE REGION. WITH THE HIGHEST VALUES OVER THE INTERIOR PORTION OF THE AREA.
346 AM EDT FRI APR 22 2016 A COLD FRONT ACROSS THE CENTRAL LAKES WILL PUSH SOUTHEAST ACROSS THE AREA TODAY. THIS WILL BE FOLLOWED BY CANADIAN HIGH PRESSURE WHICH WILL PUSH SOUTHEAST ACROSS THE AREA OVERNIGHT AND LINGER INTO THE WEEKEND.
THEY SEEM TO BE LINING UP ALONG A WEAK TROUGH STRETCHING FROM SOUTH OF TUPELO TO THE SHOALS TO NORTH OF FAYETTEVILLE TN, BUT THIS IS NOT THE MAIN COLD FRONT. SHEAR IS WEAK BUT FREEZING/WET-BULB ZERO LEVELS ARE SOMEHWAT LOW. ONCE THE FRONT CLEARS THE AREA THIS EVENING, THE AREA IS IN FOR A NICE WEEKEND WITH LITTLE WEATHER OF NOTE, AS DEEP RIDGING BUILDS OVER THE EASTERN CONUS.
TODAY THROUGH SATURDAY NIGHT UPPER LEVEL ANALYSIS HAS RIDGE OVER THE CENTRAL CONUS. WITH CLOSED LOW AND ASSOCIATED TROF JUST OFF THE WEST COAST. WEAK LOW PRESSURE IS LOCATED ACROSS CENTRAL MONTANA. HIGH PRESSURE IS LOCATED ACROSS NORTH CENTRAL SD. WARMER AIR WILL CONTINUE TO PUSH INTO THE REGION TODAY AS RIDGE MOVES OVER THE HIGH PLAINS AND WEAK SURFACE BOUNDARY SHIFTS NORTH AND EAST OF THE AREA AS A WARM FRONT. UPPER RIDGE SHIFTS INTO THE MIDWEST AS CLOSED LOW MOVES INTO THE GREAT BASIN AND CENTRAL ROCKIES.
A COLD FRONT WILL CROSS THE AREA LATE TONIGHT. HIGH PRESSURE BUILDS IN FOR THE WEEKEND.
A TROUGH CONTINUES TO APPROACH THE COAST THIS EVENING AS THE RIDGE THAT HAS BEEN OVER THE AREA MOVES EAST.
326 AM CDT FRI APR 22 2016 An upper level trough is currently pushing off to the east and will continue to do so today as an upper level ridge builds into the plains today. Highs will warm into the lower to middle 70s this afternoon under partly cloudy skies. The upper level ridge will build over the region this weekend allowing warm conditions to occur.
WATER VAPOR STLT IMAGERY EARLY THIS MORNING SHOWED THE CLOSED LOW THAT HAD BEEN OVER OUR AREA RECENTLY WAS NEAR THE IL/IN BORDER AND MOVING SEWD. A MID TROPOSPHERIC RIDGE WAS TO OUR WEST AND MOVING EWD. SOUTH WINDS WILL INCREASE SOMEWHAT TONIGHT BUT MUCH MORESO ON SAT AS LOW PRES STRENGTHENS OVER THE HIGH PLAINS.
636 AM EDT FRI APR 22 2016 MOISTURE WILL INCREASE ACROSS THE AREA TODAY AHEAD OF AN APPROACHING COLD FRONT AND SUPPORT SHOWERS AND SCATTERED THUNDERSTORMS.
Local radars show scattered showers and thunderstorms ahead of an approaching cold front from west central Alabama southward to near Mobile Bay and continuing southward into the Gulf early this Friday morning. High temperatures will be around 80 to the lower 80s.
HIGH PRESSURE ASSOCIATED WITH A WEAK FRONT WILL PUSH INTO THE AREA TODAY WITH LIGHT WINDS BACKING TO EAST AND NORTHEAST. THE APPROACH AND PASSAGE OF A 500 MB DISTURBANCE ALONG WITH A WEAK COLD FRONT SAGGING SOUTH WILL GENERATE ISOLATED SCATTERED CONVECTION OVER PORTIONS OF DEEP SOUTH TEXAS TONIGHT. THE COLD FRONT STALLS OVER DEEP SOUTH TEXAS FRIDAY AND FRIDAY NIGHT. LOW TEMPERATURES TONIGHT WILL GENERALLY BE IN THE LOWER 70S. HIGH TEMPERATURES FRIDAY WILL RANGE FROM THE LOWER 80S NEAR THE COAST TO THE UPPER ACROSS THE UPPER VALLEY. LOW TEMPERATURES WILL BE SLIGHTLY COOLER FRIDAY NIGHT WITH TEMPERATURES FALLING INTO THE MID 60S TO AROUND 70. A WEAK GRADIENT ALONG THE LOWER TEXAS COAST WILL MAINTAIN LIGHT TO MODERATE WINDS AND LOW TO MODERATE SEAS THROUGH THE PERIOD.
417 AM CDT FRI APR 22 2016 Today - Saturday: While the upper low which has dominated our weather for the past several days has moved into IL we'll still have to deal with some of its' residual after effects in the form of cloud cover. 00Z models didn't handle this very well but the 06z NAM run looks more reasonable and spreads the low clouds across the northern third of the CWA this morning before lifting and eventually scattering out by mid afternoon. Upper ridging now over the Rockies will translate east with the ridge axis passing through early Saturday.
MAXIMUM TEMPERATURES THIS AFTERNOON SHOULD RUN SOME 7F TO 12F WARMER THAT LATE APRIL CLIMATOLOGICAL AVERAGES. TEMPS ON SUN SHOULD BE A LITTLE COOLER.
Mostly clear skies and dry conditions are anticipated through tonight due to an upper level ridge building over the Rockies today shifting into the Plains tonight. Meanwhile, an upper level low is progged to move into the Pacific Northwest today then into the Intermountain West tonight. Lee troughing will develop across eastern Colorado in response to this low leading to winds shifting to more of a southerly direction this afternoon and continuing overnight. Slightly above normal temperatures are expected today and tonight with highs today reaching into the mid to upper 70s with lows in the low to mid 50s tonight.
600 AM EDT FRI APR 22 2016 SHOWERS AND THUNDERSTORMS TODAY WITH A COLD FRONT LATE THIS AFTERNOON AND EVENING. HIGH PRESSURE DOMINATES WEEKEND.
WEAK COLD AIR ADVECTION BEHIND THE UPPER LEVEL TROUGH THAT BROUGHT YESTERDAYS RAIN WAS PRODUCING AN AREA OF STRATUS IN MN. 2 AM TEMPERATURES IN THE DVN CWA RANGED FROM THE MID 40S TO THE LOWER 50S. HIGH PRESSURE RIDGE WILL SETTLE OVER THE CWA BRINGING CLEAR SKIES AND LIGHT WINDS.
349 AM EDT FRI APR 22 2016 HIGH PRESSURE WILL MOVE EAST OF THE REGION THIS MORNING WHILE LOW PRESSURE APPROACHES WESTERN NEW ENGLAND. THE LOW WILL CROSS THE REGION TONIGHT.
503 AM EDT FRI APR 22 2016 A LOW PRESSURE AREA BRINGS RAIN SHOWERS TO THE NORTH COUNTRY TODAY. A COLD FRONT PUSHES THROUGH FRIDAY NIGHT AND EARLY SATURDAY. HIGH PRESSURE WILL THEN BUILD IN, SETTING US UP FOR A SUNNY BUT SEASONABLY COOL WEEKEND.
UPPER LEVEL ANALYSIS PLACES LOW ROTATING THROUGH THE MIDWEST WITH RIDGE OVER THE NORTHERN ROCKIES WORKING INTO THE NORTHERN PLAINS. QUIET WEATHER REMAINS OVER THE AREA AS UPPER RIDGE BROADENS AND WORKS OVER THE PLAINS AS UPPER LOW/TROUGH PUSHES ONSHORE AND WORKS TOWARDS THE GREAT BASIN. THIS WILL ALSO BRING WARMER TEMPERATURES TO THE AREA. LATEST WATER VAPOR IMAGERY SHOWS OUR NEXT UPPER TROUGH TO AFFECT WESTERN AND CENTRAL NORTH DAKOTA THE SECOND HALF OF THE WEEKEND. CURRENTLY THE TROUGH IS LOCATED JUST OFF THE WEST COAST. 700MB RIDGE AXIS SHIFTS THROUGH CENTRAL NORTH DAKOTA FRIDAY NIGHT.
HIGHS TODAY WILL BE IN THE LOW TO MID 60S. EXCEPT COOLER NEAR LAKE MICHIGAN. WILL KEEP LIKELY RAIN/CHANCE THUNDER MENTION GOING THROUGH THE EVENING WITH HIGHEST POPS IN THE SOUTH DUE TO DIGGING NATURE OF APPROACHING UPPER TROUGH. MAIN FOCUS ON CONVECTIVE DEVELOPMENT IN FAR WESTERN PARTS OF FORECAST AREA AS WELL AS UPSTREAM NEAR THE UPPER LOW. ARC OF STORMS ONGOING CLOSER TO THE UPPER LOW FROM WATERLOO IOWA TO MOLINE TO WEST OF SPRINGFIELD IL. WITH SLOW FALL OVERNIGHT AS THE COLD FRONT APPROACHES. UPPER LOW WILL CONTINUE TO OPEN AND LINGER FRIDAY. GIVEN UPSTREAM TRENDS UNDER THE UPPER LOW WITH SCATTERED SHOWERS AROUND. LUCKILY THE WEEKEND WILL FEATURE DRY CONDITIONS WITH HIGH PRESSURE IN CONTROL IN BETWEEN WAVES.
629 AM EDT FRI APR 22 2016 HIGH PRESSURE WILL MOVE EAST OF THE REGION THIS MORNING WHILE LOW PRESSURE APPROACHES WESTERN NEW ENGLAND. THE LOW WILL CROSS THE REGION TONIGHT.
THIS WILL BE ASSOCIATED WITH AN UPPER LEVEL LOW PASSING ACROSS WYOMING AND SOUTH DAKOTA THROUGH THE WEEKEND.
610 AM EDT FRI APR 22 2016 A COLD FRONT ACROSS THE CENTRAL LAKES WILL PUSH SOUTHEAST ACROSS THE AREA TODAY. THIS WILL BE FOLLOWED BY CANADIAN HIGH PRESSURE WHICH WILL PUSH SOUTHEAST ACROSS THE AREA OVERNIGHT AND LINGER INTO THE WEEKEND.
Satellite imagery this morning reveals a large upper level low to our west with clouds streaming northward. As the upper low traverses eastward across southern Idaho tonight into Saturday, shower activity will become more widespread across the Northern Rockies while highs will be 20 to 30 degrees colder than it has been this past week.
AS A COLD FRONT SLOWLY TREKS EAST THROUGH THE CWA DURING THE COURSE OF THE DAY. HIGH PRESSURE AT THE SURFACE AND RIDGING ALOFT WILL BUILD INTO THE REGION OVERNIGHT INTO SATURDAY. A PLEASANT SPRING DAY IS EXPECTED SATURDAY AS HIGHS WARM INTO THE LOWER 80S UNDER SUNNY SKIES.
1127 PM MDT THU APR 21 2016 UPPER RIDGE MIGRATES EASTWARD ACROSS COLORADO TONIGHT AND FRIDAY AS NEXT UPPER MOVES ONSHORE ACROSS THE PACIFIC NORTHWEST. AND MOST MOUNTAIN AND VALLEY LOCATIONS WILL DROP BELOW FREEZING FOR ANOTHER NIGHT. WITH 80S ACROSS THE LOWER ARKANSAS VALLEY. UPPER RIDGE SLIDES TO THE EAST FRI EVE. A LOW PRESSURE SYSTEM CROSSING THE PAC NW AND GREAT BASIN WILL INCREASE SW WINDS ALOFT OVER THE 4 CORNERS. AND 60S FOR THE HIGH VALLEYS.
213 AM EDT FRI APR 22 2016 A SLOW MOVING COLD FRONT OVER THE GREAT LAKES WILL PUSH SOUTHEAST ACROSS PENNSYLVANIA LATE TODAY AND TONIGHT. HIGH PRESSURE WILL BUILD INTO THE REGION THIS WEEKEND. SFC COLD FRONT WILL APPROACH FROM THE OHIO VALLEY FRIDAY. MAINLY IN THE S/SE AS THE UPPER LOW AND REAL COLD AIR ALOFT TAKE UNTIL MIDNIGHT OR SO ON FRIDAY NIGHT TO PASS COMPLETELY THROUGH. SHOWING A MIGRATION FROM A BROAD TROUGH/RIDGE/TROUGH CONFIGURATION EXTENDING FROM THE GREAT BASIN TO THE PLAINS INTO THE MID ATLANTIC REGION AT THE START OF THE PERIOD. TOWARD A MEAN WESTERN TROUGH/BUILDING RIDGE IN THE EAST BY NEXT THU AS THE STRONG HIGH LATITUDE BLOCKING WEAKENS OVER GREENLAND/EASTERN CANADA. THIS MAY LINGER CLOUDS/LIGHT RAIN OVER SOUTHERN AREAS DURING THE MORNING BEFORE HIGH PRESSURE DRYS THINGS OUT BY THE AFTERNOON.
BY TONIGHT THE RIDGE OF HIGH PRESSURE WILL MOVE EAST OF THE AREA ALLOWING A SOUTH TO SOUTHEAST WIND TO DEVELOP. LOWS WILL BE MILDEST IN CENTRAL SOUTH DAKOTA WHERE WINDS WILL INCREASE QUICKEST WHILE THE COOLER READINGS WILL BE IN THE LOW SPOTS ACROSS NORTHWEST IOWA WHERE WINDS WILL LIKELY REMAIN AT ABOUT 6 OR 7 MPH OR LESS THROUGH MOST OF THE NIGHT. EXPECT LOWS TO RANGE FROM THE LOWER 50S IN CENTRAL SOUTH DAKOTA TO THE MID 40S IN NORTHWEST IOWA. SOUTHERLY FLOW INCREASES ON SATURDAY AS AN INTENSIFYING AREA OF LOW PRESSURE APPROACHES FROM THE WEST.
UPPER TROUGH AND WEAK FRONTAL BOUNDARY TO OUR WEST WILL MOVE ACROSS THE AREA TODAY/THIS EVENING AND THEN OFF TO THE EAST OVERNIGHT.
415 AM EDT FRI APR 22 2016 LOW PRESSURE WILL TRACK ACROSS THE REGION TODAY.
AN U/L TROUGH WILL EXTEND FROM THE OHIO RIVER VALLEY TO THE LOWER MISSISSIPPI VALLEY THIS MORNING. THE TROUGH WILL PUSH SLOWLY EAST THROUGH THE SHORT TERM PERIOD AND WILL EXTEND ALONG THE EASTERN SEABOARD TO THE NORTHEAST GULF OF MEXICO ON SATURDAY. THIS WILL INDUCE STRONG U/L RIDGING THROUGH THE PLAINS AND IN THE WAKE OF THE DEPARTING EAST COAST TROUGH. A WEAK COLD FRONT WILL PUSH ACROSS THE SOUTHEAST U. DEEP LAYER MOISTURE WILL INCREASE AND POOL OVER THE FORECAST AREA TODAY AHEAD OF THE COLD FRONT. DAYTIME HEATING AND WEAK U/L FORCING ASSOCIATED WITH THE APPROACHING U/L TROUGH WILL ALLOW THE ATMOSPHERE TO DESTABILIZE ACROSS THE FORECAST AREA THIS AFTERNOON WITH NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS DEVELOPING. PLACING THE HIGHEST POPS OVER THE INTERIOR. HIGH PRESSURE WILL BEGIN TO BUILD OVER WEST CENTRAL AND SOUTHWEST FLORIDA ON SATURDAY.
Warm air advection will get underway on Saturday as the upper level ridge axis becomes center over the CWA.
THE FIRST OF SEVERAL ACTIVE WEATHER DAYS BEGINS TODAY WITH A COLD FRONTAL PASSAGE. UPPER LEVEL LOW PRESSURE SYSTEM. AHEAD OF THE LOW. A STRONG COLD FRONT WILL MOVE EAST ACROSS SOUTHEAST OREGON THIS AFTERNOON /BETWEEN 21Z FRI AND OOZ SAT/ AND SOUTHWEST IDAHO THIS EVENING /BETWEEN 00Z-05Z SAT/. EXPECT STRONG WINDS ON SATURDAY AFTERNOON FROM MOUNTAIN HOME THROUGH THE WESTERN MAGIC VALLEY FOLLOWING THE PASSAGE OF THE UPPER LEVEL LOW EARLY SATURDAY. PRECIPITATION WILL CONTINUE THROUGH SATURDAY ACROSS MOST OF SOUTHWEST IDAHO AS MOISTURE WRAPS AROUND THE LOW.
BUT A COLD FRONT WILL GRADUALLY MOVE THROUGH THE REGION RESULTING IN SHOWERS AND A CHANCE OF THUNDERSTORMS. COOLER AND DRIER WEATHER CAN BE EXPECTED OVER THE WEEKEND. COURTESY OF HIGH PRESSURE. A COLD FRONT WILL SETTLE NORTHWEST TO SOUTHEAST ACROSS THE AREA THIS AFTERNOON INTO EVENING. THE CUTOFF LOW NOW OVER THE LOWER OHIO VALLEY. AND AHEAD OF IT THERE WILL ACTUALLY BE A LITTLE BIT OF RIDGING. AND WILL GRADUALLY CONTINUE PRESSING SOUTHEASTWARD THROUGH THE EVENING WITH THE EXITING COLD FRONT. DRY AND COOLER AIR WILL OVERTAKE THE AREA SATURDAY. AS HIGH PRESSURE BEGINS TO BUILD IN. HIGH PRESSURE WILL DRIFT OVERHEAD SATURDAY NIGHT TO PROVIDE FOR GOOD RADIATIONAL COOLING CONDITIONS AND THUS LOWS IN THE UPPER 20S-MID 30S.
112 AM EDT FRI APR 22 2016 MOISTURE INCREASING AS COLD FRONT/UPPER LOW APPROACHES FOR A BRIEF UNSETTLED PERIOD. HIGH PRESSURE FOR THE WEEKEND.
ON FRIDAY THE MID/UPPER LEVEL RIDGE MOVES/BUILDS ACROSS THE AREA AND WILL BRING PLENTY OF SUN TO THE REGION.
429 AM EDT FRI APR 22 2016 A LOW PRESSURE AREA BRINGS RAIN SHOWERS TO THE NORTH COUNTRY TONIGHT AND FRIDAY. A COLD FRONT PUSHES THROUGH FRIDAY NIGHT AND EARLY SATURDAY. HIGH PRESSURE WILL THEN BUILD IN, SETTING US UP FOR A SUNNY BUT SEASONABLY COOL WEEKEND.
1210 AM CDT FRI APR 22 2016 THE LOW PRESSURE SYSTEM WHICH BROUGHT THE MUCH NEEDED RAIN TO THE AREA OVER THE PAST FEW DAYS IS FINALLY MOVING OFF TO THE NORTHEAST.
UPPER RIDGE WILL HANG IN FOR A VERY WARM DAY TODAY.
VERY WEAK COLD FRONT CONTINUES TO SLOWLY WORK EWD ACROSS THE REGION THIS EVENING AND CONTINUES TO GENERATE A BROKEN LINE OF CONVECTION ACROSS PARTS OF S AR/N LA.
UPPER-LEVEL RIDGING REMAINS IN CONTROL OVER THE CENTRAL ROCKIES THIS AFTERNOON.
OTHERWISE LOOKING TO HAVE CLEARING SKIES OVERNIGHT TONIGHT WITH UPPER RIDGING AND POST-FRONTAL REGIME. TEMPS SHOULD STAY SLIGHTLY BELOW NORMAL TODAY THEN ACTUALLY A BIT WARMER CLOSER TO OR SLIGHTLY ABOVE NORMAL FOR SATURDAY WITH DECENT DIURNAL HEATING DESPITE THE FROPA.
HAVE TAPERED BACK POPS FOR SATURDAY AS RIDGING AT THE SURFACE AND ALOFT PREVAILS MUCH OF THE DAY. AN UPPER LEVEL TROUGH CURRENTLY OFF THE COAST OF BAJA CALIFORNIA MOVES INTO NORTHERN MEXICO WITH SLIGHT CHANCE POPS DELAYED UNTIL AFTERNOON AND THEN ONLY FOR THE RIO GRANDE VALLEY.
Overnight lows will be in the low 40s northwest to mid 40s southeast. For Friday, weak lee high plains troughing will resume with a downstream southerly wind for the forecast area evolving. Highs tomorrow will be a little warmer with 850-hPa warm air advection. Only have slight to low chance pops here as the upper level trough is still located well to the west.
UPPER LVL RIDGE AXIS WILL BE JUST WEST OF CENTRAL AND SOUTH TEXAS TODAY. AND COULD SEE ISOLATED THUNDERSTORMS AS IMPULSES MOVE OFF UPPER LOW AND NORTHERN MEXICO (THOUGH MOST OF THIS ACTIVITY HAS BEEN DIMINISHING OVER MEXICO BEFORE REACHING THE RIO GRANDE PLAINS EARLY THIS MORNING). SLIGHTLY COOLER TEMPERATURES TODAY CAN BE EXPECTED IN WAKE OF FROPA THIS MORNING. RAISED HIGHS TOMORROW BY A DEGREE OR TWO ACROSS WESTERN ZONES WHERE LESS RAIN TO KEEP THINGS COOLER IS EXPECTED.
322 AM EDT FRI APR 22 2016 A BROAD AREA OF WEAK LOW PRESSURE WILL GRADUALLY PUSH IN FROM THE WEST TODAY AND WILL DRIVE A COLD FRONT THROUGH THE REGION OVERNIGHT AS IT SHIFTS EAST.
254 AM CDT FRI APR 22 2016 The main band of showers and thunderstorms near the weak cold front will push out of west Kentucky shortly. Meanwhile, some widely scattered light showers rotating around the upper low may sneak east southeast along the I-64 corridor through sunrise. The upper low is expected to move east southeast across central/southern Indiana today. With temperatures climbing into the low to mid 70s and the 850mb cold pool moving through the EVV Tri State today, some sufficient shallow instability may develop to support isolated to scattered shower activity possibly beginning before 18Z.
238 AM EDT FRI APR 22 2016 SHOWERS AND THUNDERSTORMS TODAY WITH A COLD FRONT LATE THIS AFTERNOON AND EVENING. HIGH PRESSURE DOMINATES WEEKEND.
THE UPPER LEVEL TROF AXIS AS SHIFTED OFF TO THE EAST WITH RIDGING ALOFT MOVING IN FROM THE WEST AND A WEAK COOL FRONT APPROACHING THE SOUTHERN LOUISIANA COAST THIS MORNING. HIGH PRESSURE IS BUILDING IN AND TEMPERATURES ARE ABOUT 5 TO 10 DEGREES COOLER THAN THIS TIME YESTERDAY. DRY/MILD WEATHER TO CONTINUE INTO THE WEEKEND AS THE HIGH PRESSURE SHIFTS OFF INTO THE MID ATLANTIC STATES.
THE UPPER TROF AXIS SHIFTED EAST. A CANADIAN COLD FRONT HAD MOVED THROUGH THE FCST AREA. AND COOLER AND DRIER AIR WAS PUSHING INTO THE REGION ON GUSTY NORTH WINDS.
HIGH PRESSURE ASSOCIATED WITH A WEAK FRONT WILL PUSH INTO THE AREA TODAY WITH LIGHT WINDS BACKING TO EAST AND NORTHEAST. A WEAK COLD FRONT JUST TO THE NORTH OF THE CWA WILL PUSH SOUTH THIS MORNING. HIGH PRESSURE WILL THEN START TO SHIFT EAST TONIGHT AND WINDS WILL SHIFT TO EAST WHILE MORE HUMID AIR REMAINS OR RECOVERS IN AREAS CLOSE TO THE RIVER. PATCHY MORNING FOG MAY SET UP AGAIN WITH LIGHT EAST WINDS AND SLIGHTLY COOLER OVERNIGHT TEMPS BUT WITH A STILL SMALL DEW POINT DEPRESSION. THERE WILL BE A GENERAL OUTLOOK FOR THUNDERSTORMS SATURDAY FROM MCALLEN WEST ALONG THE RIVER AS MOISTURE POOLS ON THE MEX SIDE OF THE RIVER AND A MID LEVEL TROUGH APPROACHES FROM THE WEST OVER MEXICO.
237 AM EDT FRI APR 22 2016 A SLOW MOVING COLD FRONT OVER THE GREAT LAKES WILL PUSH SOUTHEAST ACROSS PENNSYLVANIA LATE TODAY AND TONIGHT. HIGH PRESSURE WILL BUILD INTO THE REGION THIS WEEKEND. SFC COLD FRONT WILL APPROACH FROM THE OHIO VALLEY FRIDAY. MAINLY IN THE S/SE AS THE UPPER LOW AND REAL COLD AIR ALOFT TAKE UNTIL MIDNIGHT OR SO ON FRIDAY NIGHT TO PASS COMPLETELY THROUGH. SHOWING A MIGRATION FROM A BROAD TROUGH/RIDGE/TROUGH CONFIGURATION EXTENDING FROM THE GREAT BASIN TO THE PLAINS INTO THE MID ATLANTIC REGION AT THE START OF THE PERIOD. TOWARD A MEAN WESTERN TROUGH/BUILDING RIDGE IN THE EAST BY NEXT THU AS THE STRONG HIGH LATITUDE BLOCKING WEAKENS OVER GREENLAND/EASTERN CANADA. THIS MAY LINGER CLOUDS/LIGHT RAIN OVER SOUTHERN AREAS DURING THE MORNING BEFORE HIGH PRESSURE DRYS THINGS OUT BY THE AFTERNOON.
A WEAK COLD FRONT JUST TO THE NORTH OF THE CWA WILL PUSH SOUTH THIS MORNING. HIGH PRESSURE WILL THEN START TO SHIFT EAST TONIGHT AND WINDS WILL SHIFT TO EAST WHILE MORE HUMID AIR REMAINS OR RECOVERS IN AREAS CLOSE TO THE RIVER. PATCHY MORNING FOG MAY SET UP AGAIN WITH LIGHT EAST WINDS AND SLIGHTLY COOLER OVERNIGHT TEMPS BUT WITH A STILL SMALL DEW POINT DEPRESSION. THERE WILL BE A GENERAL OUTLOOK FOR THUNDERSTORMS SATURDAY FROM MCALLEN WEST ALONG THE RIVER AS MOISTURE POOLS ON THE MEX SIDE OF THE RIVER AND A MID LEVEL TROUGH APPROACHES FROM THE WEST OVER MEXICO.
An upper level low is moving through the Great Lakes region, with a trough extending to the Gulf Coast. Ridging is in place from the Big Bend region north through the Rocky Mountains into southwestern Canada. For tonight, expect lows in the low to mid 50s, with light southeasterly winds, and mainly clear skies.
150 AM EDT FRI APR 22 2016 LOW PRESSURE WILL BRING INCREASING SHOWER CHANCES THROUGH FRIDAY. UPPER-LEVEL TROUGH NEARS THE OHIO RIVER BY FRIDAY AFTERNOON WITH INCREASING JET SUPPORT ALOFT OUT AHEAD OF IT. WITH SOUTHERN LOCATIONS CLOSEST TO THE UPPER LOW CENTER PROGGED TO CLIP THE SOUTHERN FRINGE OF THE CWA HAVING THE BEST CHANCES ALONG THE FRONT AND JUST AHEAD OF THE UPPER LOW. PRECIPITATION CHANCES WILL PERSIST UNTIL SATURDAY MORNING WHEN RIDGING BUILDS BACK IN FROM THE WEST. BUILDING RIDGING IS THEN EXPECTED TO BRING DRY WEATHER THROUGH THE REST OF THE WEEKEND.
410 AM EDT FRI APR 22 2016 MOISTURE WILL INCREASE ACROSS THE AREA TODAY AHEAD OF AN APPROACHING COLD FRONT AND SUPPORT SHOWERS AND SCATTERED THUNDERSTORMS.
ADDITIONAL ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE COLD FRONT THIS AFTERNOON. THE THREAT FOR SEVERE WEATHER REMAINS TOO MARGINAL TO MENTION IN THE HWO GIVEN THE LOW BULK SHEAR VALUES. THE UPPER LEVEL TROUGH AXIS WILL SHIFT WELL EAST OF THE AREA BY SATURDAY MORNING.
A WEAK COLD FRONT WILL SLOWLY SAG SE OVER AR AND DEVELOP SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS OVER SE AR. WINDS WILL BE SE AT 5 TO 10 MPH A HEAD OF THE COLD FRONT. THE COLD FRONT ALSO CONTINUES TO DRIFT SE OVER AR AND WILL CONTINUE IN THE OVERNIGHT HOURS. WINDS WILL BECOME W TO NW AND DRIER AIR BEHIND THE COLD FRONT. A COLD FRONT WILL PUSH THROUGH THE REGION FROM THE NORTHWEST. IT WILL REMAIN CLEAR/DRY FRIDAY NIGHT AS HIGH PRESSURE BUILDS OVER THE REGION.
513 AM CDT FRI APR 22 2016 Upper ridging is beginning to develop over the region resulting in westerly flow aloft. This will keep thunderstorm chances today mostly confined to the higher terrain. An upper low moving over northern Mexico will approach the region and allow for continuing rain and storm chances into Saturday. The best chances of precipitation will be across the Big Bend area closest to the upper low.
SATELLITE SHOWING FAIR AMOUNT OF LOW CLOUDS REMAINING ACROSS MOST OF THE CWA IN THE WAKE OF THE TROUGH. WITH A GENERALLY CLEAR SKY AND LIGHT WINDS AS HIGH PRESSURE RETREATS TO THE EAST.
Mostly clear skies and dry conditions are anticipated through tonight due to an upper level ridge building over the Rockies today shifting into the Plains tonight. Meanwhile, an upper level low is progged to move into the Pacific Northwest today then into the Intermountain West tonight. Lee troughing will develop across eastern Colorado in response to this low leading to winds shifting to more of a southerly direction this afternoon and continuing overnight. Slightly above normal temperatures are expected today and tonight with highs today reaching into the mid to upper 70s with lows in the low to mid 50s tonight. Only have slight to low chance pops here as the upper level trough is still located well to the west.
325 AM CDT FRI APR 22 2016 THE UPPER LOW RESPONSIBLE FOR THE PAST SEVERAL DAYS OF ACTIVE WEATHER CONTINUES TO GENERATE PRECIPITATION ACROSS THE MS AND OH VALLEY REGIONS AS IT HEADS FOR THE NORTHEAST. AN UPPER RIDGE WILL SHIFT EAST ACROSS THE PLAINS ON THE HEELS OF THE UPPER LOW.
OVERALL TEMPERATURES WILL BE IN THE LOW TO MID 30S ACROSS THE CWA. WARMER AIR ALSO MOVES BACK INTO THE REGION WITH HIGHS WARMING INTO THE 60S AND LOW 70S.