Aikyam-Lab/Synoptic-Bench huggingface dataset:
636 AM CDT FRI APR 29 2016 FOR 12Z TAFS /ISSUED 330 AM CDT FRI APR 29 2016/ WEAK RIDGE PATTERN IS IN PLACE OVER THE GULF REGION THIS EARLY FRI MORNING. AS AFTERNOON TEMPS WARM INTO THE LOWER/MID 80S FOR MOST LOCATIONS. AS THE DIFFUSE FRONTAL BOUNDARY TO THE S LIFTS BACK TO THE N AS A WARM FRONT. LOW LEVEL BUOYANCY/SHEAR MAY BE MAXIMIZED JUST ENOUGH ALONG THE NWD MOVING WARM FRONT THIS EVENING TO RESULT IN A FEW STRONG TSTMS. AS A STRONG DOME OF HIGH PRESSURE BUILDS SEWD INTO MUCH OF THE REGION THU INTO FRI.
REX LIKE PATTERN WAS OVER THE NORTHERN PLAINS WITH UPPER RIDGE OVER SOUTH CENTRAL CANADA AND UPPER TROUGH OVER THE DESERT SOUTHWEST. UPPER RIDGE REMAINS OVER SOUTHERN CANADA THROUGH THE PERIOD HOWEVER AN UPPER TROUGH MOVES THROUGH THE FLOW MON DEPENDING ON MODEL OF CHOICE. UPPER TROUGH MOVES OUT OF THE DESERT SOUTHWEST AND INTO NE BY SAT. ANOTHER UPPER LEVEL TROUGH WILL REPLACE TROUGH IN THE DESERT SOUTHWEST SAT. WATER VAPOR LOOP INDICATED AN UPPER LOW OVER NORTHWEST ONTARIO WHICH WILL MOVE ACROSS ONTARIO THROUGH SAT. AREA WILL START OFF NORTH OF THE UPPER LOW TROUGH OVER THE CENTRAL PLAINS IN AN AREA OF A 500 MB RIDGE OVER ALBERTA AND SASKATCHEWAN.
TEMPS WILL BE GENERALLY A LITTLE WARMER EAST HALF. WITH HIGHS MOSTLY IN THE LOWER 80S. SHOWERS WILL BECOME MORE PREDOMINANT TONIGHT AND TOMORROW AS A WARM FRONT BRINGS DEEP MOISTURE INTO MIDDLE TENNESSEE AND THE PARENT LOW MOVES NORTHEASTWARD OUT OF THE SOUTHERN PLAINS TOWARD THE CORN BELT. COVERAGE WILL DECREASE BY AFTERNOON AS THE WARM FRONT LIFTS NORTH OF THE AREA.
/ISSUED 411 AM EDT FRI APR 29 2016/ HIGH PRESSURE ALOFT AND AT THE SURFACE WILL DOMINATE THE WEATHER TODAY. THE RIDGING SHOULD HELP SUPPRESS CONVECTION TODAY. THE HIGH RES MODELS ARE IN DISAGREEMENT ON TIMING/COVERAGE OF ANY PRECIP ON SATURDAY.
THE CLOSED UPPER LOW THAT HAS BEEN AFFECTING THE REGION THE LAST FEW DAYS HAS MOVED INTO EASTERN WI AS OF 07Z. ANOTHER CLOSED UPPER LOW WILL DROP SOUTHEASTWARD FROM ONTARIO AND BE NORTH OF THE ARROWHEAD BY 7 PM FRIDAY. THIS LOW WILL PUSH SOME ENERGY THROUGH THE FORECAST AREA THIS AFTERNOON. THE ONTARIO UPPER LOW MOVES OVER NORTHERN LAKE SUPERIOR LATE TONIGHT ACCOMPANIED BY A SHORT WAVE TROF. EVEN THOUGH A SHOT OF VORTICITY MOVES THROUGH THE BASE OF THIS TROF OVER THE ARROWHEAD LATE TONIGHT. THE ONTARIO CLOSED LOW MOVES EASTWARD INTO THE EASTERN PORTION OF ONTARIO. THE SHORT WAVE TROF REMAINS OVER THE REGION SATURDAY.
SATELLITE SHOWING AN UPPER LOW MOVING NORTHEAST OUT OF THE FOUR CORNERS REGION THIS MORNING THAT IS ROTATING CLOUDS NORTHWARD ACROSS WYOMING INTO SOUTHERN MONTANA. AFTERNOON TEMPERATURES LOOK TO BE ABOUT 10 TO 12 DEGREES WARMER THAN YESTERDAY BUT STILL WELL BELOW NORMAL FOR THIS TIME OF YEAR WITH READINGS IN THE UPPER 40S TO LOWER 50S. UPPER LOWS WERE SEEN ON WATER VAPOR IMAGERY THIS MORNING. MODELS DID TRY TO BRING SOME MOISTURE N TOWARD THE AREA AROUND THE LOW. SAT WAS SIMILAR TO TONIGHT WITH THE UPPER LOW OVER KS/NE AND A RIDGE SETTLING N OF THE LOWER PRESSURE OVER THE FORECAST AREA FORMING A REX BLOCK. HIGH PRESSURE ALOFT STRENGTHENS OVER THE AREA SAT NIGHT AND MOISTURE GETS SUPPRESSED S.
728 AM EDT FRI APR 29 2016 LOW PRESSURE WILL MOVE ACROSS THE MID ATLANTIC STATES THIS MORNING. PUSHING COLD FRONT SOUTH INTO THE CAROLINAS BY THIS AFTERNOON.
HIGH PRESSURE REMAINS OVER THE FORECAST AREA THIS MORNING. THE HIGH OVER LOW BLOCKING PATTERN WILL REMAIN IN PLACE OVER THE NORTHERN PLAINS THROUGH THE SHORT TERM PERIOD MEANING NO SIGNIFICANT SYNOPTIC SYSTEMS TO INFLUENCE OUR WEATHER. SURFACE AND UPPER LEVEL HIGH PRESSURE IS SITUATED OVER SOUTHERN CANADA BRINGING COOL AND DRY CONDITIONS TO THE FORECAST AREA. WE WOULD PROBABLY BE QUITE A BIT COOLER IF THE MID LEVEL MOISTURE LINGERING OVER THE AREA FOR THE PAST FEW DAYS WERE A LITTLE LESS ROBUST. BUT ALLOWED FOR SOME WARMING AS 85H TEMPERATURES DO WARM A LITTLE AND OUR MID LEVEL MOISTURE GETS WRUNG OUT WITH THE BUILDING UPPER HIGH TO OUR NORTH. WINDS THIS AFTERNOON ARE NOT EXPECTED TO BE STRONG AND UTILIZING SOME OF THE HIGHER GUIDANCE WINDS WE ARE STILL NOT MORE THAN 10 TO 15 MPH SUSTAINED TODAY.
A WEAK TRANSITORY RIDGE WILL MOVE SOUTHEAST OUT OF OUR AREA THIS MORNING THEN A BROAD UPPER LOW WILL MOVE INTO THE PACIFIC NORTHWEST. GUSTS TO 25 MPH ARE EXPECTED ON THE WEST SIDE BUT 40 MPH AT RIDGES AND ON THE EAST SIDE. CLOUDS WILL LINGER INTO EARLY SATURDAY THEN THE TROUGH WILL MOVE SOUTH THROUGH NEVADA TO SOUTHERN CALIFORNIA ON SATURDAY AND A STRONG RIDGE WILL BUILD OVER THE EASTERN PACIFIC INTO WESTERN CANADA.
ISSUED BY NATIONAL WEATHER SERVICE GRAY ME 1040 AM EDT FRI APR 29 2016 HIGH PRESSURE WILL REMAIN ACROSS THE AREA THROUGH SATURDAY.
621 AM CDT FRI APR 29 2016 THE CLOSED UPPER LOW THAT HAS BEEN AFFECTING THE REGION THE LAST FEW DAYS HAS MOVED INTO EASTERN WI AS OF 07Z. ANOTHER CLOSED UPPER LOW WILL DROP SOUTHEASTWARD FROM ONTARIO AND BE NORTH OF THE ARROWHEAD BY 7 PM FRIDAY. THIS LOW WILL PUSH SOME ENERGY THROUGH THE FORECAST AREA THIS AFTERNOON. THE ONTARIO UPPER LOW MOVES OVER NORTHERN LAKE SUPERIOR LATE TONIGHT ACCOMPANIED BY A SHORT WAVE TROF. EVEN THOUGH A SHOT OF VORTICITY MOVES THROUGH THE BASE OF THIS TROF OVER THE ARROWHEAD LATE TONIGHT. THE ONTARIO CLOSED LOW MOVES EASTWARD INTO THE EASTERN PORTION OF ONTARIO. THE SHORT WAVE TROF REMAINS OVER THE REGION SATURDAY.
722 AM EDT FRI APR 29 2016 HIGH PRESSURE STRETCHING FROM CENTRAL CANADA TO NORTHERN NEW ENGLAND WILL YIELD MILD AFTERNOONS AND CHILLY NIGHTS THROUGH SATURDAY.
The easterly trajectory along with a dense high canopy means we may end up noticeably cooler than forecast. As a powerful jet rounds the base of the mean trof out West, translating height falls to the southern Plains, Low pressure develops/evolves and the teleconnected flow backs across the mid Mississippi river valley. This will allow a surge of ample moisture awaiting transport, and as the Low(s) move eastward out of the Plains, they'll shoot pieces of energy across their attendant boundaries.
HIGH PRESSURE HAS MOVED OFF TO THE EAST WITH WEAK RETURN FLOW SETTING UP ACROSS MIDDLE TENNESSEE AS RADIATION COOLING HAS DROPPED TEMPS INTO THE 50'S ACROSS THE AREA. BY AFTERNOON, LOOK FOR CLOUDS TO BEGIN SPREADING INTO MIDDLE TENNESSEE AS A WARM FRONT NOSES ITS WAY TOWARD THE MID STATE. SHOWERS WILL BECOME MORE PREDOMINANT TONIGHT AND TOMORROW AS THE WARM FRONT PUSHES ADDITIONAL MOISTURE INTO MIDDLE TENNESSEE AND THE PARENT LOW MOVES NORTHEASTWARD OUT OF THE SOUTHERN PLAINS TOWARD THE CORN BELT.
758 AM EDT FRI APR 29 2016 AN INVERTED TROUGH FROM LOW PRESSURE ACROSS WEST VIRGINIA WILL DISSOLVE BY LATE IN THE DAY. HIGH PRESSURE OUT OF CENTRAL CANADA WILL MAKE MINIMAL PROGRESS SOUTHWARD BEFORE LOW PRESSURE OUT OF THE CENTRAL/SOUTHERN PLAINS TRANSLATES EAST ACROSS THE OHIO VALLEY THIS WEEKEND. A COLD FRONT FRONT WILL DROP ACROSS THE GREAT LAKES MID WEEK. SMALL CLOSED LOW ACROSS WISCONSIN WILL CROSS LAKE ERIE THIS AFTERNOON AND CONTINUE EASTWARD BECOMING AN OPEN WAVE. HIGH PRESSURE ATTEMPTS TO SETTLE IN FROM THE NORTH TONIGHT. LOW PRESSURE PULLING OUT OF THE SOUTHERN/CENTRAL PLAINS WILL BRING OVERCAST SKIES BACK BY MIDDAY/MID AFTERNOON ON SATURDAY. AGAIN AS WHAT WAS A CLOSED UPPER LOW ACROSS MID COUNTRY OPENS AND JOINS THE MEAN FLOW.
508 AM MDT FRI APR 29 2016 AN UPPER LOW WILL BE OVER SOUTH CENTRAL COLORADO TODAY. THIS LOW IS PROGGED TO MOVE INTO WESTERN KANSAS TONIGHT AND SATURDAY. THE LOW WILL THEN MOVE EAST INTO NORTHCENTRAL KANSAS SATURDAY NIGHT.
1157 AM EDT FRI APR 29 2016 AN INVERTED TROUGH FROM LOW PRESSURE ACROSS WEST VIRGINIA WILL DISSOLVE BY LATE IN THE DAY. HIGH PRESSURE OUT OF CENTRAL CANADA WILL MAKE MINIMAL PROGRESS SOUTHWARD BEFORE LOW PRESSURE OUT OF THE CENTRAL/SOUTHERN PLAINS TRANSLATES EAST ACROSS THE OHIO VALLEY THIS WEEKEND. A COLD FRONT FRONT WILL DROP ACROSS THE GREAT LAKES MID WEEK. SMALL CLOSED LOW ACROSS WISCONSIN WILL CROSS LAKE ERIE THIS AFTERNOON AND CONTINUE EASTWARD BECOMING AN OPEN WAVE. HIGH PRESSURE ATTEMPTS TO SETTLE IN FROM THE NORTH TONIGHT. LOW PRESSURE PULLING OUT OF THE SOUTHERN/CENTRAL PLAINS WILL BRING OVERCAST SKIES BACK BY MIDDAY/MID AFTERNOON ON SATURDAY. AGAIN AS WHAT WAS A CLOSED UPPER LOW ACROSS MID COUNTRY OPENS AND JOINS THE MEAN FLOW.
421 AM PDT FRI APR 29 2016 A cooler system will bring increased cloud cover and areas of rain across Eastern Washington and north Idaho today.
A FRONT AND ITS UPPER TROUGH WILL MOVE THROUGH WESTERN WASHINGTON TODAY FOR OCCASIONAL SHOWERS OVER MOST OF THE AREA.
ISOLATED STRONG TO SEVERE THUNDERSTORMS PERSIST ACROSS NORTHWEST OKLAHOMA IN ASSOCIATION WITH THE UPPER LEVEL TROUGH. THE BIGGEST CONCERN WILL BE CONVECTION DEVELOPING ALONG A WARM FRONT, CURRENTLY STRETCHED ACROSS NORTH TEXAS, AS WELL AS THE UNCERTAINTY TO THE NORTHWARD DISPLACEMENT OF THE BOUNDARY DURING THE AFTERNOON. SO FAR, LATEST HRR AND SHORT RANGE RAP & NAM MODELS ALL LIFT THE WARM FRONT AS FAR NORTH INTO NORTHERN OKLAHOMA, BEFORE OVERTAKEN BY A COLD FRONT BY LATE THIS EVENING/EARLY SATURDAY MORNING. THE POTENTIAL CERTAINLY EXIST FOR SEVERE SUPERCELL THUNDERSTORMS AND THE POTENTIAL FOR A FEW TORNADOS ALL DEVELOPING ALONG AND JUST AHEAD OF THE WARM FRONT. GIVEN PROGD LOCATION OF SURFACE CYCLONE AND WARM FRONT.
A STORM SYSTEM WILL BRING CHANCES FOR RAIN AND HIGH ELEVATION SNOW TO NORTHERN ARIZONA TODAY WITH THE BEST CHANCES OVER THE HIGHER TERRAIN. THIS MORNING'S SATELLITE IMAGERY REVEALS THAT THE UPPER LEVEL LOW RESPONSIBLE FOR SHOWER AND THUNDERSTORM ACTIVITY ACROSS PORTIONS OF NORTHERN ARIZONA OVER THE LAST DAY OR SO IS CURRENTLY LIFTING NORTHEASTWARD INTO NEW MEXICO AND COLORADO. IN ADDITION, A SHORT WAVE TROUGH IS CURRENTLY EXTENDING FROM CENTRAL APACHE COUNTY SOUTHWESTWARD THROUGH GILA COUNTY. LOOK FOR THIS TROUGH TO BE THE FOCUS FOR SHOWERS THIS MORNING AS IT ROTATES AROUND THE BACKSIDE OF THE LOW. BY LATE MORNING, THE TROUGH WILL HAVE LARGELY PASSED THROUGH NORTHERN ARIZONA, WITH THE PRIMARY DRIVER OF DAYTIME SHOWERS BEING DRIVEN BY CONVECTIVE INSTABILITY. MOST ACTIVITY WILL DEVELOP OVER THE HIGHER TERRAIN TODAY AND PROGRESS WITH THE WEST- NORTHWEST FLOW OFF THE TERRAIN.
THIS MCS IS DEVELOPING ALONG AND NORTH OF A WARM FRONT WHICH EXTENDS FROM CENTRAL MISSISSIPPI WESTWARD INTO SOUTHERN ARKANSAS. WHEN THE WARM FRONT EXTENDING EAST FROM CENTRAL MISSISSIPPI INTO SOUTHWEST ALABAMA PUSHES FURTHER NORTH INTO NW AL. DESPITE FREEZING LEVEL AROUND 13000 FEET.
ISSUED BY NATIONAL WEATHER SERVICE GRAY ME 1239 PM EDT FRI APR 29 2016 HIGH PRESSURE WILL REMAIN ACROSS THE AREA THROUGH SATURDAY.
A WARM FRONT HAS PUSHED NORTH OF THE DALLAS/FORT WORTH METROPLEX. THIS WARM FRONT HAS BEEN THE CATALYST FOR SHOWERS AND THUNDERSTORMS OVERNIGHT AND WILL CONTINUE TO A FOCUS FOR STORM INITIATION THROUGH THE MORNING. IT IS DIFFICULT TO SAY EXACTLY WHERE THE WARM FRONT WILL END UP THIS AFTERNOON. WE HAVE DECIDED NOT TO ISSUE A FLASH FLOOD WATCH AT THIS POINT IN TIME SINCE THE UPPER LOW IS PROGGED TO LIFT TO THE CENTRAL PLAINS OVERNIGHT/EARLY SATURDAY MORNING WHICH WILL SHIFT THE HEAVIEST RAINFALL INTO EAST TEXAS. DRIER AND COOLER AIR WILL BEGIN TO WORK IN FROM THE NORTHWEST EARLY SATURDAY MORNING BEHIND A COLD FRONT.
1001 AM CDT FRI APR 29 2016 SHOWERS AND THUNDERSTORMS SHOULD CONTINUE TO MOVE OFF TO THE NORTHEAST AHEAD OF A VORT LOBE CONNECTED TO A NEGATIVELY TILTED TROUGH THAT IS LOCATED FROM WESTERN MONTANA INTO THE TEXAS PANHANDLE. /ISSUED 607 AM CDT FRI APR 29 2016/ 12Z TAF CYCLE MOIST UPSLOPE SURFACE FLOW ALONG WITH AN UPPER LOW APPROACHING FROM THE WEST TODAY WILL ALLOW FOR SCATTERED TO NUMEROUS CONVECTION AT ALL THREE TAF SITES THROUGH ABOUT 20Z TODAY TO AROUND 02Z TO 05Z SATURDAY. /ISSUED 334 AM CDT FRI APR 29 2016/ CLOSED UPPER LOW NEAR THE FOUR CORNERS REGION WILL TRACK EASTWARD INTO THE CENTRAL AND SOUTHERN ROCKIES TODAY. INCREASING CHANCES FOR CONVECTION TODAY ALONG WITH CLOUDY SKIES AND BRISK UPSLOPE SURFACE FLOW SHOULD KEEP TEMPS IN THE LOW TO MID 60S.
737 AM EDT FRI APR 29 2016 AVIATION A FEW LIGHT RAIN SHOWERS AND SPRINKLES WILL LINGER TODAY BEFORE HIGH PRESSURE TO THE NORTH OF THE GREAT LAKES REGION BRIEFLY BUILDS IN TO PRODUCE FAIR WEATHER TONIGHT INTO SATURDAY. HOWEVER ANOTHER LOW PRESSURE SYSTEM WILL MOVE NORTHEAST INTO THE LOWER OHIO VALLEY REGION THIS WEEKEND AND BRING SOME SHOWERS TO SOUTHERN LOWER MICHIGAN LATE SATURDAY THROUGH SATURDAY NIGHT. HIGH TEMPS TODAY WILL ONLY REACH THE LOWER TO PERHAPS MIDDLE 50S. DRY WX IS ANTICIPATED TONIGHT THROUGH AT LEAST MIDDAY SATURDAY AS HIGH PRESSURE TO THE NORTH BRIEFLY TAKES HOLD.
A WARM FRONT THAT WAS LOCATED NEAR I-20 AT THE START OF THE PERIOD CONTINUES TO LIFT NORTH ACROSS THE REGION. THIS CONVECTION IS ELEVATED AND ORIENTED JUST NORTH OF A RETURNING WARM FRONT AT THE SURFACE. A TIGHTENING PRESSURE GRADIENT ALONG AND SOUTH OF THIS RETURNING WARM FRONT WILL RESULT IN INCREASING WINDS TODAY THUS HAVE POSTED A LAKE WIND ADVISORY WITH THIS PACKAGE ACROSS OUR SOUTHWEST HALF THROUGH 00Z THIS EVENING. ENCOMPASSING MORE OF S AR AND N LA ALONG AND AHEAD OF A SLOW MOVING COLD FRONT WHICH SHOULD BE NEAR OR JUST EAST OF THE I-30 CORRIDOR SAT AFTN.
946 AM EDT FRI APR 29 2016 LOW PRESSURE WILL MAINTAIN CLOUDY SKIES WITH SHOWER CHANCES TODAY.
OBSERVATIONS INDICATE ENCROACHING MVFR FROM THE SOUTHWEST, BUT DRY NE FLOW IN THE LOWER-LEVELS HAS KEPT EASTWARD PROGRESS HALTED THROUGH THE EARLY MORNING, A TREND THAT SHOULD LARGELY CONTINUE. REINFORCED BY THE EASTWARD EJECTION OF THE AFORMENTIONED UPPER LOW THROUGH MID AFTERNOON. PRECIPITATION AND CORRESPONDING HIGHER CLOUD COVERAGE WILL AGAIN ACT TO RESTRICT THE DIURNAL TEMPERATURE RESPONSE OF AN ALREADY COOL RESIDENT THERMAL PROFILE /850 MB TEMPS NEAR FREEZING/. HIGHS LARGELY IN THE LOWER 50S. GENERAL SURFACE RIDGING AND CORRESPONDING DRY LOW LEVEL EASTERLY FLOW.
CENTRAL AND SOUTHWEST MONTANA REMAIN UNDER LOW PRESSURE ALOFT WITH LOW TO MIDDLE LEVEL MOISTURE CAUSING MAINLY VFR CIGS.
06Z SFC DATA HAS A WEAK TROF FROM SOUTHERN IOWA INTO THE OHIO VALLEY WITH THE NEXT STORM SYSTEM IN THE SOUTHERN ROCKIES. DRY AND SEASONABLY COOL CONDITIONS WILL BE SEEN ACROSS THE AREA AS HIGH PRESSURE MOVES ACROSS THE UPPER GREAT LAKES. MOSTLY IN THE LOWER 50S NORTHERN 2/3 OF THE AREA TO AROUND 60F FAR SOUTH.
DRY UPPER RIDGING OVER THE AREA TODAY AND TONIGHT WILL BEGIN TO SHIFT EAST OF THE REGION SATURDAY ALLOWING A MOISTURE INCREASE. MID AND UPPER LEVEL RIDGING WILL EXPAND OVER THE REGION TODAY FROM THE GULF OF MEXICO. A WEAK BACKDOOR COLD FRONT/TROUGH BISECTS THE AREA AS OF LATE MORNING. IT WILL REMAIN DRY WITH H85 NORTHWEST DOWNSLOPE FLOW TODAY AND H5 RIDGING THROUGH TONIGHT. FOLLOWED THE GUIDANCE CONSENSUS FOR THE LOW TEMPERATURE TONIGHT. SOME INCREASE IN MOISTURE WILL OCCUR SATURDAY WITH A LOW-LEVEL SOUTHERLY FLOW AND THE UPPER RIDGE BEGINNING TO SHIFT EAST OF THE REGION.
1108 AM EDT FRI APR 29 2016 DESPITE THE SOUTHERN EDGE OF HIGH PRESSURE TRYING TO BUILD INTO THE REGION TODAY. A WARM FRONT PUSHING INTO THE AREA ON SATURDAY WILL LEAD TO WIDESPREAD SHOWERS SATURDAY.
REDEVELOPMENT OF SHOWERS AND THUNDERSTORMS ALONG AND JUST AHEAD OF THE WARM FRONT WILL OCCUR ACROSS CENTRAL ARKANSAS INTO NORTHWEST MISSISSIPPI BY THIS EVENING. A DEEP TROUGH IS POSITIONED ACROSS THE WESTERN US. DEW POINTS ARE STILL IN THE LOW 50S ACROSS MOST OF THE MIDSOUTH. THE 00Z NAM KEPT THE HIGHER INSTABILITY FARTHER SOUTH. THIS SEEMS UNLIKELY WITH LIGHT WIND AND DEW POINTS IN THE LOW 50S. A WARM FRONT WILL SURGE NORTH.
1038 AM CDT FRI APR 29 2016 15z/10am surface analysis shows stationary frontal boundary extending from West Virginia southwestward to an area of low pressure over the Texas panhandle. Meanwhile, high pressure over southern Canada dominates the weather across the Great Lakes/Midwest. This high will gradually shift off to the east, allowing the front to slowly lift northward tonight. Highs will mainly be in the lower to middle 60s, but will top out around 70 degrees south of I-70 where sunshine will be more prevalent. Expect light winds and slightly cooler than normal temperatures. Deep trof over the western half of the CONUS will eject out another low for the Midwest this weekend.
Between late morning and early afternoon, skies will clear as a Pacific cold front/drlyine sweeps east through the area today. /issued 340 AM CDT FRI APR 29 2016/ (Today and Tonight) Upper low currently over the Four Corners region will move east across southern Colorado today and into Kansas by this evening. This will force the Pacific front/dryline east across our area today, with a cold front dropping south across the northern half of the CWA tonight. Highs today will be in the lower to middle 80s, with lows tonight in the lower and middle 50s.
RIDGING BOTH SURFACE AND ALOFT WILL ONLY ALLOW SOME HIGH/MID LEVEL CLOUDS FOR LATE IN THE FORECAST PERIOD. MAIN THREAT FOR CONVECTION WILL BE SATURDAY AS WARM FRONTAL BOUNDARY LIFTS NORTHEAST.
1149 AM CDT FRI APR 29 2016 STRONG SHORT WAVE TROUGH CURRENTLY CENTERED OVER N NM TO EJECT NE INTO THE CENTRAL STATES THROUGH SATURDAY. THIS TROUGH TO PROVIDE NUMEROUS TSTMS THROUGH SATURDAY WITH MVFR CEILINGS. BAND OF STRONG STORMS CONTINUE TO TRAIN ALONG A WARM FRONT DRAPED ROUGHLY ALONG THE RED RIVER OF NE TX/SE OK EWD INTO SRN AR. AS THE UPPER LOW INCHES EWD TODAY/TONIGHT.
1108 AM EDT FRI APR 29 2016 A WEAK LOW PRESSURE AREA WILL RESIDE OVER THE MOUNTAINS THIS AFTERNOON WITH HIGH PRESSURE WEDGING SOUTHWEST FROM THE MID ATLANTIC INTO THE PIEDMONT OF VIRGINIA.
A STORM SYSTEM WILL BRING CHANCES FOR RAIN AND HIGH ELEVATION SNOW TO NORTHERN ARIZONA TODAY WITH THE BEST CHANCES OVER THE HIGHER TERRAIN. TWO SEPARATE LOW PRESSURE CIRCULATIONS ARE CURRENTLY MOVING ACROSS THE SOUTHWEST THIS MORNING. MOST ACTIVITY WILL DEVELOP OVER THE HIGHER TERRAIN TODAY AND PROGRESS WITH THE WEST- NORTHWEST FLOW OFF THE TERRAIN.
900 AM PDT FRI APR 29 2016 DRY AND A LITTLE WARMER TODAY UNDER WEAK HIGH PRESSURE. A LOW PRESSURE SYSTEM MOVING SOUTHWARD THROUGH THE WESTERN STATES WILL BRING COOLING AND GUSTY WINDS FOR THE MOUNTAINS AND DESERTS SATURDAY WITH A CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS FOR SATURDAY AFTERNOON AND EVENING.
802 AM EDT FRI APR 29 2016 UPDATE A FEW LIGHT RAIN SHOWERS AND SPRINKLES WILL LINGER TODAY BEFORE HIGH PRESSURE TO THE NORTH OF THE GREAT LAKES REGION BRIEFLY BUILDS IN TO PRODUCE FAIR WEATHER TONIGHT INTO SATURDAY. HOWEVER ANOTHER LOW PRESSURE SYSTEM WILL MOVE NORTHEAST INTO THE LOWER OHIO VALLEY REGION THIS WEEKEND AND BRING SOME SHOWERS TO SOUTHERN LOWER MICHIGAN LATE SATURDAY THROUGH SATURDAY NIGHT. HAVE UPDATED THE FORECAST TO INCLUDE A MENTION OF SNOW THROUGH MID MORNING ACROSS THE HIGHER ELEVATIONS NORTH OF ROUGHLY HIGHWAY M20. HIGH TEMPS TODAY WILL ONLY REACH THE LOWER TO PERHAPS MIDDLE 50S. DRY WX IS ANTICIPATED TONIGHT THROUGH AT LEAST MIDDAY SATURDAY AS HIGH PRESSURE TO THE NORTH BRIEFLY TAKES HOLD.
MEANWHILE IN THE HIGH COUNTRY ABOVE 6000 FEET. SCATTERED SHOWERS OVER THE HIGHER TERRAIN OF IDAHO ON SATURDAY. UPPER LOW NEAR MISSOULA/MT THIS MORNING WILL BE BRIEFLY JOINED BY ANOTHER UPPER LOW FROM THE NORTH PACIFIC THIS AFTERNOON. MAX TEMPS WILL BE A FEW DEGS LOWER TODAY WITH THE UPPER LOWS NEARBY.
915 AM CDT FRI APR 29 2016 MID LEVEL CLOUDS AND SPRINKLES HAVE BEEN NOTED AROUND THE MOBRIDGE AREA. THICKER CLOUDS AND COOLER TEMPS AT 925/850MB WILL PREVAIL ACROSS THE SOUTHERN CWA. MAIN FOCUS IN THE SHORT TERM IS THE LOW PRESSURE SYSTEM MOVING ACROSS THE CENTRAL PLAINS TONIGHT THROUGH SATURDAY EVENING.
931 AM EDT FRI APR 29 2016 DESPITE THE SOUTHERN EDGE OF HIGH PRESSURE TRYING TO BUILD INTO THE REGION TODAY. A WARM FRONT PUSHING INTO THE AREA ON SATURDAY WILL LEAD TO WIDESPREAD SHOWERS SATURDAY.
/ISSUED 1001 AM CDT FRI APR 29 2016/ SHOWERS AND THUNDERSTORMS SHOULD CONTINUE TO MOVE OFF TO THE NORTHEAST AHEAD OF A VORT LOBE CONNECTED TO A NEGATIVELY TILTED TROUGH THAT IS LOCATED FROM WESTERN MONTANA INTO THE TEXAS PANHANDLE. /ISSUED 607 AM CDT FRI APR 29 2016/ 12Z TAF CYCLE MOIST UPSLOPE SURFACE FLOW ALONG WITH AN UPPER LOW APPROACHING FROM THE WEST TODAY WILL ALLOW FOR SCATTERED TO NUMEROUS CONVECTION AT ALL THREE TAF SITES THROUGH ABOUT 20Z TODAY TO AROUND 02Z TO 05Z SATURDAY. /ISSUED 334 AM CDT FRI APR 29 2016/ CLOSED UPPER LOW NEAR THE FOUR CORNERS REGION WILL TRACK EASTWARD INTO THE CENTRAL AND SOUTHERN ROCKIES TODAY. INCREASING CHANCES FOR CONVECTION TODAY ALONG WITH CLOUDY SKIES AND BRISK UPSLOPE SURFACE FLOW SHOULD KEEP TEMPS IN THE LOW TO MID 60S.
ISSUED BY NATIONAL WEATHER SERVICE GRAY ME 918 AM EDT FRI APR 29 2016 HIGH PRESSURE WILL REMAIN ACROSS THE AREA THROUGH SATURDAY.
1023 AM EDT FRI APR 29 2016 CURRENTLY - NORTH ATLANTIC HIGH PRESSURE CELL EXTENDS INTO THE FLORIDA PENINSULA. TEMPERATURES ARE CLIMBING UPWARDS THROUGH THE LOWER 80S WITH DEW POINTS NEAR 70. SHORT TERM UPDATE - HIGH PRESSURE TO OUR NORTH WILL MAINTAIN LIGHT EAST TO SOUTHEAST BREEZES TODAY. HIGH PRESSURE TO OUR NORTH WILL KEEP WINDS LIGHT TO GENTLE OUT OF THE EAST TO SOUTHEAST ACROSS KEYS WATERS. WINDS ARE STILL ON TRACK TO INCREASE THIS WEEKEND AS THE HIGH TO OUR NORTH IS REINFORCED.
UPPER 60S WITH A FEW READINGS EVEN IN THE LOWER 70S. AXIS OF THE HIGH PRESSURE RIDGE WILL SHIFT TO OUR SOUTH AS A WEAK FRONTAL TROUGH PUSHES OFF THE GEORGIA COAST. WIND FLOW BECOMES LIGHT SOUTHEAST 5 TO 10 KNOTS AS HIGH PRESSURE BUILDS OVER THE ATLANTIC.
856 AM PDT FRI APR 29 2016 A cooler system will bring increased cloud cover and areas of rain across Eastern Washington and north Idaho today.
a nearly stationary warm front extended eastward along/near the Red River with a cold front/dryline trailing to the southwest. North of the warm front. with additional thunderstorms near the upper low in Western Oklahoma and the Oklahoma/Texas Panhandles. the true warm front with 70 degree dewpoints looks to remain in the vicinity of the Red River. Depending on exactly where the true warm front sets up. will determine the higher potential for tornadic development.
STRONG SUBSIDENCE ALOFT WILL SPREAD OVER THE REGION THIS AFTERNOON ON THE BACK SIDE OF THE UPPER LOW MOVING ACROSS COLORADO. DRY WESTERLY SURFACE WINDS QUICKLY SPREAD ACROSS WEST TEXAS BEHIND THE UPPER LEVEL TROUGH AXIS AS IT PIVOTS NORTHWARD ACROSS THE TEXAS PANHANDLE INTO THE CENTRAL PLAINS DURING THE LATTER HALF OF THE AFTERNOON. THIS TROUGH WILL BE SUPPORTED BY A JET STREAK FROM NRN NEW MEXICO TO THE OZARKS.
607 AM CDT FRI APR 29 2016 12Z TAF CYCLE MOIST UPSLOPE SURFACE FLOW ALONG WITH AN UPPER LOW APPROACHING FROM THE WEST TODAY WILL ALLOW FOR SCATTERED TO NUMEROUS CONVECTION AT ALL THREE TAF SITES THROUGH ABOUT 20Z TODAY TO AROUND 02Z TO 05Z SATURDAY. /ISSUED 334 AM CDT FRI APR 29 2016/ CLOSED UPPER LOW NEAR THE FOUR CORNERS REGION WILL TRACK EASTWARD INTO THE CENTRAL AND SOUTHERN ROCKIES TODAY. INCREASING CHANCES FOR CONVECTION TODAY ALONG WITH CLOUDY SKIES AND BRISK UPSLOPE SURFACE FLOW SHOULD KEEP TEMPS IN THE LOW TO MID 60S.
THE LOW PRESSURE SYSTEM OVER COLORADO WILL EXIT EAST INTO THE PLAINS LATE TONIGHT. THE UPPER LOW CURRENTLY CENTERED OVER COLORADO WILL CONTINUE ON A SLOW EAST-NORTHEAST TRACK INTO THE CENTRAL PLAINS STATES THIS WEEKEND.
1030 AM EDT FRI APR 29 2016 MOSTLY SUNNY CONDITIONS EXPECTED TODAY UNDER HIGH PRESSURE. CHATTANOOGA AIRPORT, TN 87 61 83 64 / 0 20 50 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 84 60 81 64 / 0 10 50 60 OAK RIDGE, TN 85 61 80 63 / 0 20 60 70 TRI CITIES AIRPORT, TN 81 53 78 57 / 0 20 50 60.
637 AM CDT FRI APR 29 2016 Large trough of low pressure continues to spin across the Great Basin and Desert Southwest this morning. with well-established southwest flow prevailing downstream across the Plains and into the Lower Missouri Vly. expect increasing cloud cover as upper trough shifts east and sfc front to our south begins to lift north with time. precip chances will again increase from south to the north during the late afternoon hrs with activity becoming more widespread heading into the evening and overnight hrs as main trough ejects east and takes on a negative tilt across the central High Plains.
Vapor imagery and upper air data showed mainly zonal flow over the Gulf Coast states, with no obvious short wave troughs upstream. There are mixed signals in the NWP guidance, but the HRRR appears to be handling the current cloud cover well, and it's solution maintains the low overcast through the overnight hours. Tonight's lows will be near average in the lower to mid 40s.