Aikyam-Lab/Synoptic-Bench huggingface dataset:
940 PM CDT MON MAR 28 2016 CLEAR SKIES AND LIGHT WINDS UNDER THE CORE OF A RIDGE OF HIGH PRESSURE WILL ALLOW FOR IDEAL RADIATIONAL COOLING CONDITIONS TONIGHT. THE MAIN QUESTION IS WITH WHETHER ANY FOG WILL DEVELOP UNDER THE CORE OF THE RIDGE. THIS RIDGE AXIS IS CURRENTLY CENTERED OVER LAKE MICHIGAN AND WILL BE TO THE EAST OF THE REGION BY DAYBREAK TOMORROW MORNING. ALONG THE WESTERN PERIPHERY OF THE RIDGE IN CENTRAL WISCONSIN. WINDS COME AROUND TO THE SOUTH TOMORROW AS A RIDGE OF HIGH PRESSURE SHIFTS EAST THROUGH THE GREAT LAKES. WEAK HIGH PRESSURE MOVING EAST ACROSS THE AREA TONIGHT AND TO THE EAST ON TUESDAY WILL BRING QUIET WEATHER.
813 PM EDT MON MAR 28 2016 LOW PRESSURE OFF THE NEW ENGLAND COAST WILL DEEPEN AND MOVE NORTHEAST TONIGHT AS HIGH PRESSURE BUILDS SOUTH THROUGH THE OHIO VALLEY.
719 PM EDT MON MAR 28 2016 CLEARING WILL CONTINUE OVERNIGHT AS A RIDGE OF HIGH PRESSURE SETTLES ACROSS THE REGION AND PROVIDE LIGHT WINDS AND CHILLY CONDITIONS WITH LOWS IN THE UPPER 20S TO LOWER 30S. WITH HIGH TEMPERATURES TUESDAY WILL BE ABOUT 5 TO 10 DEGREES WARMER THAN MONDAY.
Clear and dry conditions should prevail throughout the day on Tuesday due to the deep ridging pattern, and winds will be light and variable.
TEMPERATURES TONIGHT SHOULD BE WARMER THAN EXPECTED.
749 PM EDT MON MAR 28 2016 IT WILL BE DRY AND COOLER BEHIND A COLD FRONT TONIGHT.
THE HIGH PRESSURE OVER THE REGION TODAY WILL SHIFT EAST FOR TUE. A COLD FRONT WILL MOVE INTO THE HIGH PLAINS BY LATE TUESDAY NIGHT.
/ISSUED 303 PM CDT MON MAR 28 2016/ PATTERN WILL TRANSITION TO A MORE ACTIVE ONE OVER THE NEXT SEVERAL DAYS WITH MOIST SW FLOW BECOMING ESTABLISHED ALOFT AHEAD OF BROAD MID/UPPER LEVEL TROUGH. THIS TROUGH WILL CONTINUE SHIFTING SSEWD ACROSS THE GREAT BASIN TONIGHT BEFORE COMING OUT IN PIECES WITH A POSITIVE TILT THE MIDDLE OF THE WEEK. LOW LEVEL WINDS WILL GRADUALLY INCREASE OFF THE GULF AND STRENGTHEN INFLUX OF WARMER/MORE MOIST AIR ACROSS SERN TX.
632 PM CDT MON MAR 28 2016 High pressure in firm control of the weather pattern this afternoon as evidenced by latest visible satellite imagery that continues to show little if any cloud cover across the area. Southerly flow starting to return to the area this afternoon with temps now hovering well into the lower to middle 60s across the Lwr Missouri Vly. attention quickly shifts to large-scale upper low pressure system spinning across the Northern Rockies and Great Basin regions this afternoon.
THIS HIGH WILL MOVE OFF TO THE EAST BY TUESDAY MORNING WITH SOUTHEAST WINDS OFF THE GULF HELPING TO BRING IN LOW LEVEL MOISTURE AND INCREASING CLOUDINESS. /ISSUED 314 PM CDT MON MAR 28 2016/ HIGH PRESSURE CENTERED OVER THE MISS RIVER VALLEY BROUGHT US ABUNDANT SUNSHINE TODAY WITH TEMPERATURES THIS AFTERNOON IN THE LOW TO MID 70S IN EAST TEXAS AND CENTRAL LOUISIANA TO THE MID TO UPPER 70S ALONG THE I-10 CORRIDOR. THIS HIGH PRESSURE WILL SHIFT TO THE EAST TONIGHT. THIS ACTIVITY WILL BE DUE TO A NORTHWARD MOVING WARM FRONT IN THE GULF OF MEXICO.
1209 AM EDT TUE MAR 29 2016 A LARGE AREA OF HIGH PRESSURE OVER WESTERN ONTARIO WILL BUILD SOUTHEAST TONIGHT AND TUESDAY INTO THE GREAT LAKES REGION.
AS A LEE SIDE TROUGH DEEPENS TUESDAY. OVERNIGHT LOWS WILL BE ABOUT 10 DEGREES WARMER TONIGHT COMPARED TO THIS MORNING DUE TO INCREASING CLOUD COVER BUT NO SIGNIFICANT WEATHER IS EXPECTED INTO EARLY TOMORROW.
/ISSUED 936 PM CDT MON MAR 28 2016/ A WEAKENING PSEUDO STATIONARY FRONT WAS JUST ALONG THE COAST AS CAN BE SEEN BY THE DEWPOINT FIELD /LOWER 60S AT THE COAST AND 40S AND 50S ALONG THE HIGHWAY 59 CORRIDOR/.
1003 PM CDT MON MAR 28 2016 SFC RIDGING WILL PERSIST FROM THE MID MS VALLEY SW INTO ECNTRL TX OVERNIGHT. THE LOW LEVEL MOISTURE FIELD SHOULD GRADUALLY DEEPEN DURING THE DAY TUESDAY.
1049 PM EDT MON MAR 28 2016 IT WILL BE DRY AND COOLER BEHIND A COLD FRONT TONIGHT.
936 PM CDT MON MAR 28 2016 A WEAKENING PSEUDO STATIONARY FRONT WAS JUST ALONG THE COAST AS CAN BE SEEN BY THE DEWPOINT FIELD /LOWER 60S AT THE COAST AND 40S AND 50S ALONG THE HIGHWAY 59 CORRIDOR/. /ISSUED 303 PM CDT MON MAR 28 2016/ PATTERN WILL TRANSITION TO A MORE ACTIVE ONE OVER THE NEXT SEVERAL DAYS WITH MOIST SW FLOW BECOMING ESTABLISHED ALOFT AHEAD OF BROAD MID/UPPER LEVEL TROUGH. THIS TROUGH WILL CONTINUE SHIFTING SSEWD ACROSS THE GREAT BASIN TONIGHT BEFORE COMING OUT IN PIECES WITH A POSITIVE TILT THE MIDDLE OF THE WEEK. LOW LEVEL WINDS WILL GRADUALLY INCREASE OFF THE GULF AND STRENGTHEN INFLUX OF WARMER/MORE MOIST AIR ACROSS SERN TX.
THE SYSTEM WILL ALSO USHER IN MUCH COOLER TEMPERATURES TUESDAY.
Much of the area will continue to see light-moderate southeast winds through the night with overnight lows several degrees warmer. The numerical guidance is now in good agreement in ejecting the western CONUS upper low/trough across the Plains midweek.
931 PM PDT MON MAR 28 2016 HIGH WINDS WILL CONTINUE ALONG THE RIDGE TOPS AND DESERT SLOPES THIS EVENING.
1114 PM CDT MON MAR 28 2016 High pressure in firm control of the weather pattern this afternoon as evidenced by latest visible satellite imagery that continues to show little if any cloud cover across the area. Southerly flow starting to return to the area this afternoon with temps now hovering well into the lower to middle 60s across the Lwr Missouri Vly. attention quickly shifts to large-scale upper low pressure system spinning across the Northern Rockies and Great Basin regions this afternoon.
SURFACE MOISTURE BOUNDARY LOOKS TO BE ACROSS THE LOWER SOUTHEAST TEXAS AND LOWER SOUTHERN LOUISIANA. WITH DEW POINTS IN THE LOWER TO MID 60S COMPARED TO UPPER 40S AND LOWER 50S FURTHER INLAND. THE HIGH WILL MOVE OFF TO THE EAST BY TUESDAY MORNING WITH SOUTHEAST WINDS OFF THE GULF HELPING HELPING TO LIFT THE BOUNDARY INLAND AND INCREASE MOISTURE AND CLOUDINESS. /ISSUED 314 PM CDT MON MAR 28 2016/ HIGH PRESSURE CENTERED OVER THE MISS RIVER VALLEY BROUGHT US ABUNDANT SUNSHINE TODAY WITH TEMPERATURES THIS AFTERNOON IN THE LOW TO MID 70S IN EAST TEXAS AND CENTRAL LOUISIANA TO THE MID TO UPPER 70S ALONG THE I-10 CORRIDOR. THIS HIGH PRESSURE WILL SHIFT TO THE EAST TONIGHT. THIS ACTIVITY WILL BE DUE TO A NORTHWARD MOVING WARM FRONT IN THE GULF OF MEXICO.
HIGH PRESSURE ALOFT WILL RETURN TO UTAH FOR THE WEEKEND. WARM FRONTAL PRECIP NORTH OF THE LOW IS LIFTING NWWD ACROSS THE NW DESERTS. THESE COULD REDEVELOP OVER THE NRN AND ERN CWA ON WED AS WRAPAROUND MOISTURE WORKS BACK WWD AROUND THE DEPARTING UPPER LOW.
A RIDGE OF HIGH PRESSURE LOCATED OVER THE TENNESSEE. PLEASANT PERIOD OF WEATHER AS HIGH PRESSURE MOVES OVER THE REGION TONIGHT AND THEN MOVES TO THE MID ATLANTIC BY TUESDAY NIGHT. WOULD NOT BE SURPRISED TO SEE SOME PATCHY FROST IN THE COOLER LOCATIONS OF WEST TN.
COOLER AIR PUSHING IN BEHIND MONDAY MORNING'S COLD FRONT. CHATTANOOGA AIRPORT, TN 43 67 43 72 / 0 0 0 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 63 40 72 / 0 0 0 0 OAK RIDGE, TN 39 65 41 72 / 0 0 0 10 TRI CITIES AIRPORT, TN 35 61 35 71 / 0 0 0 0.
THE LOW TEMPERATURE AT THE KEY WEST INTERNATIONAL AIRPORT WAS 58 DEGREES.
WEST WINDS THIS EVENING WILL BECOME LIGHTER OVERNIGHT AND SHIFT TO THE NORTH TOMORROW AS HIGH PRESSURE BUILDS IN FROM THE WEST.
954 AM MDT THU MAY 21 2015 LATEST OBSERVATIONS SHOW HIGH PRESSURE OVER WESTERN SOUTH DAKOTA RESULTING IN SUNNY SKIES. TODAY THROUGH FRIDAY NIGHT A RATHER COMPLEX UPPER PATTERN EXISTS WITH A LARGE-SCALE RIDGE COVERING WRN CANADA BUT WITH A TROUGH UNDERCUTTING IT OVER THE SWRN CONUS. A DEEP HUDSON BAY LOW WAS ASSOCIATED WITH A MEAN TROUGH OVER ERN NOAM.
A WEAK PRESSURE GRADIENT OVER THE REGION HAS ALLOWED WINDS TO REMAIN IN THE 10 TO 15 MPH RANGE TROUGH THE NIGHT. HIGH PRESSURE WILL CONTINUE TO DOMINATE THE REGION TODAY. TEMPERATURES WILL BE WARMER HOWEVER. HIGH PRESSURE BEGINS TO SHIFT EAST FRIDAY. THE UPPER LEVEL PATTERN TRANSITIONS FROM WEAK RIDGING TO SOUTHWEST FLOW. A WELL DEFINED TROUGH IS EXPECTED TO MOVE INTO THE NORTHERN PLAINS LATE FRIDAY.
UNDERNEATH THIS LOW STRATUS. WITH THE MERCURY ONLY REACHING THE LOW TO MID 60S BY THE LATE AFTERNOON.
/ISSUED 338 AM EDT THU MAY 21 2015/ ANOTHER WEAK COLD FRONT IS CURRENTLY ACROSS NORTHERN GA. HIGH PRESSURE WILL BUILD IN BEHIND THE BOUNDARY FOR THE OVERNIGHT HOURS AND FRIDAY. THE HIGH RES MODELS ARE PROGGING A SEABREEZE ALONG THE GULF COAST. AND UPPER LEVEL RIDGING SETS UP OVER THE LOWER MISSISSIPPI VALLEY.
650 AM CDT THU MAY 21 2015 ANOTHER COOLER THAN NORMAL DAY IS ANTICIPATED ACROSS CENTRAL AND SOUTHEAST ILLINOIS TODAY, BUT IT WILL BE SIGNIFICANTLY MILDER THAN YESTERDAY. THE WARMING WILL COME COURTESY OF SOMEWHAT UNUSUAL NORTHWEST LOW-LEVEL FLOW WARM ADVECTION BETWEEN A SOUTHWARD SINKING RIDGE OF HIGH PRESSURE AND AN APPROACHING BACK-DOOR COLD FRONT. HIGHS FRI IN THE LOW TO MID 70S WITH MILDEST READINGS SW AREAS.
WINDS ARE MOSTLY WEST AT 5 TO 10 MPH WHILE LOCAL RADARS ARE DETECTING ISOLATED SHOWERS ALONG THE LOWER KEYS AND NORTH INTO THE NEARSHORE GULF WATERS. OUR AREA LIES ON THE EASTERN PERIPHERY OF A RIDGE OF HIGH PRESSURE LOCATED IN THE SOUTHEAST GULF OF MEXICO AND A THERMAL TROUGH DIGGING DOWN INTO SOUTH FLORIDA.
1001 AM EDT THU MAY 21 2015 HIGH PRESSURE WILL BUILD INTO THE AREA LATE TODAY.
COLD FRONT IS CURRENTLY PUSHING SOUTHWARD THROUGH CENTRAL ALABAMA EARLY THIS MORNING. THE FRONT WILL CONTINUE TO PUSH SOUTHWARD TODAY WHICH WILL FILTER IN COOLER AND MUCH DRIER AIR FROM THE NORTH. WHILE EUFAULA COULD RISE CLOSE TO 90 BEFORE THE COOLER AIR REALLY BEGINS TO FILTER INTO BARBOUR COUNTY.
A LOW PRESSURE TROUGH OVER THE WEST COAST WILL KEEP COOLER THAN NORMAL WEATHER FOR THE AREA ALONG WITH THE POSSIBILITY FOR LIGHT SHOWERS THROUGH THE REST OF THE WORK WEEK. SLIGHT WARMING CAN BE EXPECTED OVER THE WEEKEND AS A WEAK RIDGE STARTS TO BUILD INTO OUR AREA. ANOTHER STRONGER UPPER LOW IS FORECAST TO DROP SOUTHWARD THROUGH THE BASE OF A BROAD UPPER TROUGH. THE UPPER LOW CAN BE SEEN ON THE WATER VAPOR NEAR 130W. THE HRRR AND RAP BOTH INDICATE INCREASED SHOWER ACTIVITY THIS AFTERNOON AS THE UPPER LOW DEEPENS OFF THE COAST. THE TROUGH AND UPPER LOW WILL MOVE SOUTH AND EAST OF THE AREA BY LATE FRIDAY WITH HIGH PRESSURE BUILDING INLAND DURING THE WEEKEND FROM THE EASTERN PACIFIC.
MVFR CIGS SHOULD REMAIN IN PLACE ABOVE THE SHALLOW COLD SECTOR NORTH OF A SURFACE COLD FRONT. /ISSUED 406 AM CDT THU MAY 21 2015/ COOL AIR WILL CONTINUE TO FILTER INTO THE REGION TODAY BEHIND A COLD FRONT. PRECIPITATION CHANCES WILL TEMPORARILY DECREASE EARLY THIS EVENING WITH BRIEF RIDGING ALOFT. STORM CHANCES WILL INCREASE FROM WEST TO EAST OVERNIGHT AND FRIDAY AS THE RIDGE AXIS MOVES EAST AND AN UPPER LEVEL LOW PRESSURE SYSTEM MOVES ON SHORE IN THE WEST.
GIVEN THE COOLER AIR SETTLING INTO THE REGION AS WELL AS THE RAIN AND CLOUD TRENDS.
1034 AM EDT THU MAY 21 2015 LOW PRESSURE WILL PASS TO THE SOUTH TODAY AND MOVE OFF THE CAROLINAS TONIGHT. HIGH PRESSURE WILL BUILD IN FOR THE WEEKEND. WHICH SHOULD MOVE IN WEST OF THE BLUE RIDGE BY MID AFTN. THINKING EAST OF BLUE RIDGE WILL SEE OFF/ON PCPN THRU THE AFTN. THEN TAPERING OFF THIS EVENING AS THE LOW PUSHES TO THE EAST. MAINLY DRY CONDITIONS WITH BRIEF HIGH PRESSURE BUILDING IN BEFORE THE COLD FRONT ON FRIDAY. COOLER AIR IN PLACE WILL ALLOW FOR LOWS IN THE 40S. LOW PRESSURE WILL MOVE AWAY FROM THE MIDDLE ATLANTIC COAST ON FRIDAY. WEST TO NORTHWEST WINDS WILL BECOME BREEZY DURING THE DAY AS LOW PRESSURE PULLS AWAY AND HIGH PRESSURE BUILDS IN FROM THE WEST.
925 AM PDT THU MAY 21 2015 COOL AND UNSETTLED CONDITIONS WILL PREVAIL THROUGH FRIDAY AS LOW PRESSURE APPROACHES THE AREA TODAY AND MOVES OVER THE AREA TONIGHT AND FRIDAY. THIS LOW WILL BRING THE THREAT OF SHOWERS AND ISOLATED THUNDERSTORMS TO PARTS OF THE AREA TONIGHT AND FRIDAY. THE UPPER LOW CURRENTLY NEAR 35N/130W WILL CONTINUE TO DROP SOUTHEAST AND FINALLY MOVE ONSHORE NEAR TIJUANA FRIDAY MORNING.
SURFACE ANALYSIS LATE THIS MORNING SHOWS A NOSE OF HIGH PRESSURE IN PLACE OVER NRN MO.
SOMEWHAT DRIER AIR IS LOCATED BEHIND THIS BOUNDARY WITH DEWPOINTS DROPPING INTO THE LOWER 60S.
1002 AM EDT THU MAY 21 2015 WEST TO NW WINDS ARE IN PLACE ACROSS THE AREA THIS MORNING WITH WEAK RIDGING TO THE SOUTH AND A WEAK FRONT/TROUGH TO THE NORTH. TEMPERATURES WILL WARM INTO THE UPPER 80S ALONG THE COAST TO THE LOWER 90S INLAND.
A COLD FRONT WAS MOVING INTO THE AUS AREA AT 12Z. NEW CELL DEVELOPMENT WITH THE HIGHER RAINFALL RATES SHOULD HAVE SHIFTED SOUTH INTO THE COASTAL BEND. BUT WITH STRONGER JET ACTIVITY CARVING OUT A TROUGH FARTHER UPSTREAM. MODEL CONSENSUS KEEPS THE HIGHER QPF VALUES NEAR THE RIO GRANDE.
1044 AM CDT THU MAY 21 2015 WX MAP SHOWS COMBINATION COLD FRONT/OUTFLOW BOUNDARY NOW ENTERING INLAND SE TX. THERE IS SIGNIFICANTLY COOLER AIR ACROSS NE TX IN THE 50S/60S. RELATIVELY COOLER AND DRIER AIR WILL FILTER SWD INTO THE REGION BEHIND THE FRONT.
945 AM MST THU MAY 21 2015 AS AN UPPER LOW APPROACHES NORTHERN ARIZONA.
1240 PM EDT THU MAY 21 2015 HYDRO SCATTERED SHOWERS MAY DRIFT FROM NORTH TO SOUTH LATE THIS AFTERNOON INTO TONIGHT AS A COLD FRONT APPROACHES. TEMPS WILL BE SEVERAL DEGREES COOLER ON FRIDAY.
BLANK /ISSUED 450 AM MDT THU MAY 21 2015/ SHOWERS AND THUNDERSTORMS WILL BECOME MORE PREVALENT OVER THE NEXT FEW DAYS AS MOISTURE FROM A LOW PRESSURE SYSTEM MOVING ACROSS THE SOUTHERN US IS EJECTED UP INTO FROM THE SOUTH.
621 AM CDT Thu May 21 2015 Clouds are clearing out from north to south this morning with high pressure building in from the northwest.
TROUGH AXIS SWINGING THROUGH AROUND 00Z WILL GIVE TRI ANOTHER SHOT AT LIGHT SHOWERS.
622 AM CDT THU MAY 21 2015 QUIET WEATHER CONTINUES WHILE A BACK DOOR COLD FRONT SLOWLY WORKS ITS WAY INTO NORTH CENTRAL NORTH DAKOTA. HIGH PRESSURE WILL CONTINUE TO INFLUENCE THE WEATHER ACROSS NORTH DAKOTA TODAY. SOUTHERLY FLOW KICKS IN TONIGHT AHEAD OF THE NEXT SHORT WAVE TROUGH AND LOW PRESSURE MOVING OUT OF THE MOUNTAIN WEST. QUIET WEATHER WILL REMAIN OVER THE REGION ON FRIDAY UNDER UPPER LEVEL RIDGE. AN UNSETTLED PATTERN WILL THEN DEVELOP FOR THE WEEKEND AS UPPER LOW OVER SOUTHERN CALIFORNIA LIFTS AND BROADENS OVER THE ROCKIES. UPPER LOW CONTINUES TO LIFT AND OPEN UP TO START THE WORK WEEK BRINGING CONTINUED UNSETTLED WEATHER TO THE REGION.
1244 PM EDT THU MAY 21 2015 HIGH PRESSURE OVER THE REGION WILL PROVIDE THE REGION WITH DRY CONDITIONS THIS AFTERNOON AND EVENING. SECONDARY MSTR STARVED DISTURBANCE ROTATING THROUGH BASE OF SW TROUGH THROUGH WRN QB MAY GENERATE A SPRINKLE OR TWO AFT MIDNIGHT FAR NE AND RETAINED MENTION. PICTURESQUE WEATHER FOR THE FIRST HALF OF THE UPCOMING HOLIDAY WEEKEND AS SOUTHERN GREAT LAKES REMAIN ON THE SUBSIDENT DOWNSTREAM SIDE OF BUILDING CENTRAL CONUS RIDGE.
859 AM CDT THU MAY 21 2015 317 AM CDT RIDGE OF HIGH PRESSURE IS IN PLACE ACROSS NORTHERN ILLINOIS EARLY THIS MORNING WHILE AN EAST-WEST ORIENTED TROUGH CURRENTLY OVER LAKE SUPERIOR WILL SLOWLY SLIDE SOUTH ACROSS LAKE MICHIGAN TODAY AND TONIGHT. MID LEVEL WARM ADVECTION AND DEEP MIXING TODAY WILL HELP PUSH TEMPS 15 TO 20 DEGREES WARMER COMPARED TO YESTERDAY'S HIGH TEMPS. SO EXPECT THE WARMER TEMPS TO SPREAD RIGHT UP TO THE LAKE. EXPECT A MODEST BOOST FROM THE LAKE OVERNIGHT WITH WINDS SWINGING AROUND TO THE NORTHEAST AND TEMPS FALLING BACK INTO THE LOW TO MID 40S BEHIND.
WITH FAIR SKIES AND A SOMEWHAT COOLER AND DRIER NORTHERLY FLOW IN PLACE FOR TODAY. ANOTHER DRY DAY IS EXPECTED WITH RIDGING ALOFT AND CONFLUENT FLOW. IT WILL WARM INTO THE LOW/MID 70S WITH PLENTY OF SUNSHINE AND LIGHT RETURN FLOW.
CHATTANOOGA AIRPORT, TN 69 50 76 55 80 / 10 10 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 67 48 74 53 79 / 10 10 0 0 0 OAK RIDGE, TN 67 47 75 53 79 / 10 10 0 0 0 TRI CITIES AIRPORT, TN 65 45 72 47 77 / 40 10 10 0 0.
ANOTHER COOLER THAN NORMAL DAY IS ANTICIPATED ACROSS CENTRAL AND SOUTHEAST ILLINOIS TODAY, BUT IT WILL BE SIGNIFICANTLY MILDER THAN YESTERDAY. THE WARMING WILL COME COURTESY OF SOMEWHAT UNUSUAL NORTHWEST LOW-LEVEL FLOW WARM ADVECTION BETWEEN A SOUTHWARD SINKING RIDGE OF HIGH PRESSURE AND AN APPROACHING BACK-DOOR COLD FRONT. HIGHS FRI IN THE LOW TO MID 70S WITH MILDEST READINGS SW AREAS.
739 AM EDT THU MAY 21 2015 LOW PRESSURE OVER WESTERN NORTH CAROLINA WILL MOVE OFF THE CAROLINA COAST BY TONIGHT.
COOL AND UNSETTLED CONDITIONS WILL PREVAIL THROUGH FRIDAY AS LOW PRESSURE APPROACHES THE AREA TODAY AND MOVES OVER THE AREA TONIGHT AND FRIDAY. THIS LOW WILL BRING A THREAT OF SHOWERS AND ISOLATED THUNDERSTORMS TO PARTS OF THE AREA TONIGHT AND FRIDAY. THE UPPER LOW CURRENTLY NEAR 35N/130W WILL CONTINUE TO DROP SOUTHEAST AND FINALLY MOVE ONSHORE NEAR TIJUANA FRIDAY MORNING.
THE LARGE SCALE FEATURES A BLOCKING SPLIT FLOW UPPER LEVEL PATTERN WITH A NORTHERN MERIDIONAL NORTHERN STREAM FLOW OUT OF CENTRAL CANADA MERGING INTO THE NEARLY ZONAL SOUTHERN STREAM OVER THE CENTRAL U.
1114 AM EDT THU MAY 21 2015 HIGH PRESSURE OVER THE REGION TODAY WILL GIVE GENERALLY A DRY DAY WITH SOME SPRINKLES MOVING THROUGH THE CENTRAL PORTION OF THE REGION. SECONDARY MSTR STARVED DISTURBANCE ROTATING THROUGH BASE OF SW TROUGH THROUGH WRN QB MAY GENERATE A SPRINKLE OR TWO AFT MIDNIGHT FAR NE AND RETAINED MENTION. PICTURESQUE WEATHER FOR THE FIRST HALF OF THE UPCOMING HOLIDAY WEEKEND AS SOUTHERN GREAT LAKES REMAIN ON THE SUBSIDENT DOWNSTREAM SIDE OF BUILDING CENTRAL CONUS RIDGE.
A COLD FRONT EXTENDED FROM CORRIGAN TO JUST NORTH OF CONROE TO COLUMBUS. TEMPS ARE TRICKY AS AREAS BEHIND THE FRONT HAVE FALLEN INTO THE MID 60S BUT REMAIN IN THE LOWER 80S AHEAD OF THE FRONT. /ISSUED 459 AM CDT THU MAY 21 2015/ COLD FRONT WHICH APPEARED TO BE SLIGHTLY AHEAD OF SCHEDULE LAST NIGHT HAS SLOWED DOWN OVERNIGHT. THE PROGGED PWS NOW UP TO 2" AS THE UPPER FLOW BECOMES VERY FAVORABLE WITH THE APPROACH OF THE MAIN UPPER LOW FROM THE WEST. THIS PATTERN SHOULD PREVAIL TODAY AS WINDS BACK SLIGHTLY AHEAD OF A COLD FRONT SAGGING INTO SETX. EXPECT STORMS TO REDEVELOP THIS AFTERNOON ALONG THE SEABREEZE AND COLD FRONT IN THE COASTAL COUNTIES.
THE UPPER LEVEL LOW PRESSURE SYSTEM OFF THE CALIFORNIA COAST WILL SEND A SERIES OF WEATHER DISTURBANCES NORTH ACROSS THE GREAT BASIN THROUGH EARLY FRIDAY. THE LOW PRESSURE SYSTEM WILL SLOWLY CROSS THE GREAT BASIN LATE FRIDAY THROUGH THE WEEKEND. THE MEAN UPPER LOW CURRENTLY POSITIONED OFF THE CALIFORNIA COAST WILL CONTINUE TO EJECT VORTICITY LOBE NORTH ACROSS THE GREAT BASIN THROUGH EARLY FRIDAY. PRECIP WILL BECOME MORE WIDESPREAD BEGINNING LATE FRIDAY AS THE UPPER LOW TURNS NORTHEAST AND TRACKS THROUGH THE SOUTHERN/EASTERN GREAT BASIN.
626 AM CDT THU MAY 21 2015 FOR 12Z TAFS /ISSUED 542 AM CDT THU MAY 21 2015/ THE FLOW PATTERN ACROSS NORTH AMERICA THIS MORNING CONTINUES TO FEATURE A MID-TROPOSPHERIC SUBTROPICAL RIDGE CENTERED ACROSS MEXICO. WITH LONGWAVE TROUGHS ENCOMPASSING THE PACIFIC COAST AND EASTERN CANADA. WITH RELATED SURFACE COLD FRONT NOW SOUTHEAST OF THE REGION.
1006 AM EDT THU MAY 21 2015 LOW PRESSURE OVER WESTERN NORTH CAROLINA WILL MOVE OFF THE CAROLINA COAST BY TONIGHT.
633 AM CDT THU MAY 21 2015 317 AM CDT RIDGE OF HIGH PRESSURE IS IN PLACE ACROSS NORTHERN ILLINOIS EARLY THIS MORNING WHILE AN EAST-WEST ORIENTED TROUGH CURRENTLY OVER LAKE SUPERIOR WILL SLOWLY SLIDE SOUTH ACROSS LAKE MICHIGAN TODAY AND TONIGHT. MID LEVEL WARM ADVECTION AND DEEP MIXING TODAY WILL HELP PUSH TEMPS 15 TO 20 DEGREES WARMER COMPARED TO YESTERDAY'S HIGH TEMPS. SO EXPECT THE WARMER TEMPS TO SPREAD RIGHT UP TO THE LAKE. EXPECT A MODEST BOOST FROM THE LAKE OVERNIGHT WITH WINDS SWINGING AROUND TO THE NORTHEAST AND TEMPS FALLING BACK INTO THE LOW TO MID 40S BEHIND.
FRIDAY SHOULD BE COOLER WITH MORE CLOUDS AND THE DEEPER MARINE LAYER.
A SERIES OF UPPER LEVEL LOW PRESSURE SYSTEMS WILL AFFECT THE REGION THROUGH THE END OF THE WEEK. BUT OVERALL DRY CONDITIONS WILL PREVAIL FOR THE LOWER DESERTS.
THIS MAY WELL KEEP TEMPS A BIT COOLER TODAY HOWEVER THE MOST RECENT UPDATE WILL ONLY COOL SE OK A FEW DEGREES AND MONITOR TRENDS.
MOST OF THE MOISTURE IS IN PLACE IN THE LOWEST LEVELS OF THE ATMOSPHERE (BETWEEN 925 MB AND 850 MB). KTW /ISSUED 626 AM CDT THU MAY 21 2015/ THE LOW STRATUS DECK RESULTING IN MVFR CONDITIONS IS EXPECTED TO CONTINUE UNTIL 18-19Z WHEN CLOUDS SHOULD GRADUALLY SCATTER OUT.
711 AM EDT THU MAY 21 2015 AVIATION SCATTERED SHOWERS MAY DRIFT FROM NORTH TO SOUTH LATE THIS AFTERNOON INTO TONIGHT AS A COLD FRONT APPROACHES. TEMPS WILL BE SEVERAL DEGREES COOLER ON FRIDAY.
AN INVERTED TROUGH IS SET TO SLOWLY ERODE ALONG THE WEST SLOPES OF THE RIDGES AS LARGE SCALE FLOW WILL START TO TURN MORE NORTHWESTERLY THIS AFTERNOON. THIS WILL BEGIN TO BECOME LESS FAVORABLE TO DOWNSLOPE TROUGHING WEST OF THE RIDGES. FRIES CLOSED LOW OVER EASTERN CANADA WILL WOBBLE SOUTH FRIDAY. DEEPENING UPPER TROUGH AND PUSHING A MOISTURE STARVED COLD FRONT ACROSS THE REGION. ONLY SLIGHT CHANCE POPS WITH THE FRONT AS IT CROSSES THE REGION DURING THE DAY FRIDAY AND EXITS THE RIDGES BY EVENING. TEMPERATURES WILL FALL INTO THE LOWER AND MID 30S NORTH AND RIDGES WITH AREAS OF FROST EXPECTED.
SURFACE ANALYSIS HAS HIGH PRESSURE CENTERED OVER THE CENTRAL PLAINS AND A COLD FRONT DRAPED OVER OUR CWA BETWEEN INTERSTATE 20 AND HIGHWAY 84. A COLD FRONT. DRIER/MORE STABLE AIR MOVING IN THE BEHIND THE FRONT WILL SUPPRESS CONVECTIVE RAINFALL CHANCES TO MAINLY ALONG AND SOUTH OF THE HIGHWAY 84 CORRIDOR TODAY. SIGNIFICANTLY DRIER/COOLER AIR WILL ENCOMPASS MOST OF THE FORECAST AREA TONIGHT WITH LOW TEMPERATURES FALLING INTO THE LOWER/MIDDLE 50S FOR LOCATIONS ROUGHLY NORTH OF THE HWY 84 CORRIDOR.
/ISSUED 447 AM CDT Thu May 21 2015/ An unseasonably cool and damp day is on tap across southeast New Mexico and west Texas today in the wake of a cold front which has become quasi-stationary across the Big Bend area. Temperatures today are only expected to rise to the middle 50s across the southeastern New Mexico plains to around 70 degrees across the Lower Trans Pecos. However, precipitation is expected to taper off early Friday morning as this impulse lifts to the northeast, and with weak midlevel height rises in the wake of this trough, a bit of reprieve is expected Friday as temperatures begin to rebound into the 70s and 80s across much of the area, with mid to upper 90s across the Rio Grande Valley.
BROAD LOW AMPLITUDE UPPER RIDGE WAS OVER THE NORTHERN PLAINS. UPPER LEVEL RIDGE WILL BUILD/AMPLIFY TONIGHT THROUGH SUN. UPPER LEVEL LOW OVER THE PACIFIC NORTHWEST WILL MOVE INTO THE NORTHERN PLAINS BY 84 HOURS.
WEAKER INITIAL SHORT WAVE TROUGH SWINGING THROUGH AREA THIS AFTERNOON HAS GENERATED BROAD RAIN SHIELD WITH SOME WARM AIR ADVECTION. SHORT TERM UPPER RIDGE WILL BUILD IN QUICKLY SATURDAY NIGHT AS RAIN THREAT ENDS AND SKIES CLEAR OUT.
A LONG WAVE TROUGH IS NOW ALONG THE PACIFIC NORTHWEST COAST WITH MOST OF THE ASSOCIATED ENERGY DIRECTED INTO BRITISH COLUMBIA AND WASHINGTON STATE. THE GENERALLY UNSETTLED SHOWERY CONDITIONS OVER THE MEDFORD CWA IS DUE TO WEAK SHORT WAVES ROUNDING THE BOTTOM OF THE TROUGH. WHICH WILL BRING A FEW DAYS OF DRY AND WARMER WEATHER TO THE AREA.
950 PM CDT FRI APR 24 2015 SFC OBS FROM AROUND THE REGION SHOW THE ENTIRE FORECAST AREA IN A SIGNIFICANT WARM SECTOR WITH DEWPOINTS RUNNING IN THE LOWER/MID 70S MOST LOCATIONS AS OF 02Z. COOLER AND DRIER AIR BRING THE TEMPS BACK TO NEAR NORMAL WITH NO PRECIP EXPECTED.
736 PM EDT FRI APR 24 2015 A LOW PRESSURE CENTER WILL BE APPROACHING THE REGION TONIGHT INTRODUCING A CHANCE FOR RAIN. THIS LOW WILL MOVE TO THE OHIO RIVER VALLEY TOMORROW INCREASING THE REGIONS RAIN CHANCES. THEN THIS LOW WILL MOVE ON TO THE EAST TOMORROW NIGHT. STRONGER LOW LEVEL THETAE SURGE STILL APPEARS TO BE DELAYED UNTIL WELL AFTER 12Z FOLLOWING THE EVOLUTION OF SOUTHERN STREAM UPPER TROUGH CURRENTLY WORKING ACROSS THE SOUTHERN ROCKIES. OR PERHAPS LOWER 50S IF A SLOWER THAN CURRENT FORECAST EVOLUTION MATERIALIZES IN REGARDS TO SOUTHERN STREAM TROUGH.
1023 PM EDT FRI APR 24 2015 MOISTURE WILL INCREASE LATE TONIGHT AHEAD OF A WARM FRONT.
GIVEN THE LOW CLOUD COVER EXPECT TEMPS TO REMAIN ELEVATED IN THE MID 30S TO MID 40S RANGE. SO FREEZING/FROZEN PRECIPITATION IS NOT ANTICIPATED. WITH HIGHS MAINLY IN THE LOW TO MID 50S UNDER A BRISK EASTERLY WIND.
WITH THE POTENT UPPER LOW PASSING TO OUR NORTH OVERNIGHT. THIS ACTIVITY IS OCCURRING NORTH OF A WARM FRONT ACROSS NORTHERN TEXAS.