Aikyam-Lab/Synoptic-Bench huggingface dataset:
643 AM EDT WED APR 1 2015 WEATHER WILL BE QUIET TODAY WITH HIGH PRESSURE STILL IN CONTROL. SHOWERS AND THUNDERSTORMS ARE EXPECTED ON THURSDAY AS A COLD FRONT SLIDES ACROSS THE REGION. HIGH PRESSURE CENTERED OVER SOUTH CENTRAL OHIO EARLY THIS MORNING WILL CONTINUE TO DRIFT EAST. MID LEVEL RIDGE WILL MOVE OVER OUR AREA TODAY PROVIDING MOSTLY SUNNY SKIES AND LIGHT WINDS TO START THE DAY. GRADIENT WILL INCREASE A BIT WESTERN AREAS MID AFTERNOON AS RIDGE AXIS MOVES EAST. AN UPPER TROF HAD MOVED ONSHORE OVER THE WESTERN NORTH AMERICAN COAST. THE NAM IS INDICATING A NARROW BAND OF DEW POINTS IN THE LOWER 60S ALONG WITH AFTERNOON CAPE VALUES RISING TO AROUND 1000 J/KG.
THE HIGHEST POPS FOR TODAY ARE STILL ALONG AND EAST OF I-35 WERE MODELS SHOWS SCATTERED SHOWERS AND THUNDERSTORMS BY THIS AFTERNOON AS THE UPPER TROUGH MOVES ACROSS TEXAS TODAY. UPPER AIR ANALYSIS LAST EVENING SHOWED A SHALLOW TROUGH MOVING INTO WEST TEXAS WITH A WEAK RIDGE OVER OUR PART OF THE STATE. AT THE SURFACE AN AREA OF LOW PRESSURE WAS MOVING ACROSS NORTHERN MEXICO AND WINDS AHEAD OF THIS LOW WERE GENERALLY FROM THE SOUTH. THE UPPER LEVEL TROUGH WILL MOVE ACROSS TEXAS TODAY AND TONIGHT AND THE PATTERN WILL BECOME ZONAL BY THURSDAY. AS THE TROUGH MOVES ACROSS THERE WILL BE A CHANCE FOR SHOWERS AND THUNDERSTORMS.
CURRENT OBS SHOW TEMPS ARE ALREADY IN THE LOW TO MID 60S ACROSS THE TN VALLEY. A COLD FRONT HAS STALLED OUT JUST SOUTH OF THE TN/AL BORDER BUT IS MOSTLY A WIND AND MOISTURE BOUNDARY. BUT WILL LIFT BACK NORTH TONIGHT AS A WARM FRONT. THE COLD FRONT THAT MOVED THROUGH THIS MORNING HAS STALLED JUST TO THE SOUTH OF THE TERMINALS. DRY AIR WILL REMAIN IN PLACE AT THE LOWER LEVELS.
1238 PM CDT WED APR 1 2015 GUSTY WINDS CONTINUE OVER THE AREA IN THE WAKE OF THE COLD FRONT PUSHING OFF TO THE EAST. COLD FRONT CONTINUES TO PUSH THROUGH CENTRAL NORTH DAKOTA. THE OCCLUDING FRONTAL SYSTEM ACROSS WESTERN NORTH DAKOTA THIS MORNING IS EXPECTED TO PUSH THROUGH THE HIGHWAY 83 CORRIDOR BY 13-14 UTC. A COLD FRONT WAS JUST ENTERING WESTERN NORTH DAKOTA THIS MORNING. A STRONG COLD FRONT ACROSS WESTERN NORTH DAKOTA THIS MORNING. A STRONG COLD FRONT ACROSS WESTERN NORTH DAKOTA THIS MORNING WILL MOVE EAST ACROSS THE REMAINDER OF THE STATE BY EARLY AFTERNOON. TEMPERATURES WILL BE COOLER IN THE UPPER 30S TO THE MID 40S.
359 AM CDT WED APR 1 2015 WINDS AND FIRE WEATHER TODAY AND THEN CHANCES FOR RAIN/SNOW SHOWERS TOMORROW BEHIND THE COLD FRONT WILL BE THE MAIN FORECAST ISSUES FOR THE PERIOD. UPPER TROUGH CURRENTLY DIGGING INTO WESTERN MT WILL MOVE OUT INTO THE WESTERN PLAINS TODAY. THE HIGH CLOUDS MAY LIMIT INSOLATION A BIT TODAY. BUT WITH A WARM START AND THE THERMAL RIDGE REMAINING OVER THE AREA THROUGH AT LEAST MIDDAY. THE UPPER TROUGH MOVES OFF TO THE EAST.
359 PM EDT WED APR 1 2015 EXPECT PRIMARILY INCREASING CLOUDS INTO THE OVERNIGHT PERIOD AS LOW PRESSURE APPROACHES THE REGION. HIGHS THURSDAY WILL RANGE FROM 60 TO THE LOW 70S. CONVECTIVE OUTFLOW BOUNDARY FROM UPPER MIDWEST CONVECTION AND PRIMARY SYNOPTIC COLD FRONT WILL DROP SOUTHEAST INTO AN INCREASINGLY MOIST ENVIRONMENT LATE THURSDAY MORNING/AFTERNOON. 25 INCHES AND 850 MB DEWPOINTS 9-10C IN PRE-FRONTAL THETA-E RIDGE. STILL SOME DISAGREEMENT AMONG LATEST NWP ON EXACTLY HOW FAR SOUTH THE LOW LEVEL THETA-E TROUGH WILL PUSH.
1116 AM CDT WED APR 1 2015 MINOR CHANGE TO THE CURRENT ZONES BY RAISING THE HIGHS FOR TODAY BY A DEGREE.
404 PM CDT WED APR 1 2015 CURRENT SURFACE ANALYSIS PLACES COLD FRONT PUSHING THROUGH THE RED RIVER VALLEY WITH GUSTY WINDS OVER WESTERN THROUGH CENTRAL NORTH DAKOTA IN ITS WAKE. MAINLY QUIET WEATHER EXPECTED UNTIL TOWARDS MORNING WHEN SHORT WAVE SWINGING AROUND EASTERLY MOVING UPPER LOW NUDGES INTO THE AREA BRINGING LOW PRECIPITATION CHANCES TO THE NORTHWEST. RELATIVE HUMIDITY LEVELS WILL AGAIN BE ON THE LOW SIDE OVER THE SOUTH WHICH WILL COMBINE WITH THE WINDS TO BRING ANOTHER DAY OF FIRE CONCERNS (PLEASE SEE FIRE WEATHER DISCUSSION BELOW). AS AN UPPER LOW CONTINUES TO VACATE THE REGION.
ALL EYES REMAIN ON THE APPROACHING COLD FRONT AND THE ASSOCIATED CONVECTION EXPECTED TO DEVELOP. AIDED BY A DEVELOPING LOW LEVEL JET OVERNIGHT WHICH WILL ENHANCE CONVERGENCE ALONG THE COLD FRONT/LEADING EDGE OF THE CONVECTION. AND SLOPED COLD FRONT ALOFT RISE/FALL COUPLET. THE ONLY PRECIP POTENTIAL OVER THE WEEKEND APPEARS TO BE SAT NIGHT NE WITH WARM FRONT DEVELOPING OVER NRN IA AND WEAK WAVE RIPPLING ALONG WEAK BAROCLINIC ZONE.
SHORT TERM: (Through Late This Afternoon) An upper ridge axis will pass overhead today. At the surface, a boundary which was located near the MO/AR border last night will be drawn northeastward as a warm front during the day in response to a developing low pressure system over the northern plains. The thermal ridge axis will be over central MO and good mixing conditions are forecast.
CHANGES EXPECTED THIS PERIOD AS A WARM FRONT PUSHES ACROSS THE AREA TOWARD 12Z THU. SFC OBS SHOW A WARM FRONT ACROSS ARKANSAS AND MISSISSIPPI SLOWLY MOVING NORTHWARD. SHORT TERM MODELS REALLY DO NOT INDICATE ANY CONVECTION UNTIL AFTER 12Z ACROSS THE WRN MIDDLE TN AS THAT WARM FRONT REALLY GETS INTO OUR WRN AREAS AND THE LOW- LEVEL JET STARTS TO KICK IN TOWARDS MORNING. HIGH PRESSURE WILL BRING VFR WX THROUGH TODAY WITH MAINLY E WINDS 5-10KT. A WARM FRONT WILL LIFT INTO THE REGION WITH INCREASING CLOUDS AND WINDS BECOMING S 10-15KT.
A broad upper level trough will take shape out west into the northern Plains today into tonight in response to a strong zonal jet stream. The cold front will continue a slow southward migration toward the Ozarks Thursday while the upper pattern becomes increasingly zonal.
A COLD FRONT WAS JUST ENTERING WESTERN NORTH DAKOTA THIS MORNING.
408 PM EDT WED APR 1 2015 HIGH PRESSURE WILL BUILD EAST OVER THE REGION TODAY AND OFF THE DELMARVA COAST TONIGHT. THURSDAY WILL TURN MUCH WARMER AHEAD OF AN APPROACHING. ALBEIT SLOW MOVING COLD FRONTAL BOUNDARY.
235 PM CDT Wed Apr 1 2015 Upper pattern looks to have primarily high pressure aloft over the region with zonal flow across the area.
LOWER CLOUDS WILL CONTINUE TO LIFT INTO THE LOW VFR CATEGORY AS AN UPPER LEVEL DISTURBANCE TRACKING ACROSS CNTRL TX BRINGS IN SOME ADDITIONAL DENSE CIRRUS. /ISSUED 1116 AM CDT WED APR 1 2015/ MINOR CHANGE TO THE CURRENT ZONES BY RAISING THE HIGHS FOR TODAY BY A DEGREE.
434 AM EDT WED APR 1 2015 WEATHER WILL BE QUIET TODAY WITH HIGH PRESSURE STILL IN CONTROL. SHOWERS AND THUNDERSTORMS ARE EXPECTED ON THURSDAY AS A COLD FRONT SLIDES ACROSS THE REGION. HIGH PRESSURE CENTERED OVER SOUTH CENTRAL OHIO EARLY THIS MORNING WILL CONTINUE TO DRIFT EAST. MID LEVEL RIDGE WILL MOVE OVER OUR AREA TODAY PROVIDING MOSTLY SUNNY SKIES AND LIGHT WINDS TO START THE DAY. GRADIENT WILL INCREASE A BIT WESTERN AREAS MID AFTERNOON AS RIDGE AXIS MOVES EAST. AN UPPER TROF HAD MOVED ONSHORE OVER THE WESTERN NORTH AMERICAN COAST. THE NAM IS INDICATING A NARROW BAND OF DEW POINTS IN THE LOWER 60S ALONG WITH AFTERNOON CAPE VALUES RISING TO AROUND 1000 J/KG.
FOLLOWING A COLD FRONT THAT HAS PRETTY MUCH CLEARED THE STATE. CONTINUE TO HAVE POPS OVER THE MOUNTAINS TODAY AS THE MAIN TROUGH AXIS MOVES THROUGH THE AREA. AND MODELS CONTINUE TO SHOW RELATIVE HUMIDIITIES DROPPING BACK INTO THE LOW TO MID TEENS THIS AFTERNOON. THE COOLER TEMPERATURES WILL CONTINUE. THE OVERALL THEME FOR THE EXTENDED CONTINUES TO BE COOLER AND MORE UNSETTLED.
A COLD FRONT IS EXPECTED TO MOVE INTO THE FORECAST AREA LATE THIS MORNING AND INTO THE AFTERNOON. SO DESPITE THE WARMER TEMPERATURES THE RELATIVE HUMIDITY SHOULD BE HIGHER. BEHIND THE COLD FRONT.
404 AM CDT WED APR 1 2015 ANALYSIS OF THE 07Z MSL DATA SHOWS LOW PRESSURE CENTERED IN WESTERN SASKATCHEWAN. A TROUGH EXTENDED FROM NORTHEAST WYOMING THROUGH THE NEBRASKA PANHANDLE AND EASTERN COLORADO TO EASTERN NEW MEXICO. THE BOUNDARY LAYER THETA-E SHOWS THE THETA-E RIDGE AXIS ACROSS EASTERN NEBRASKA WITH THE STRONGEST GRADIENT ACROSS MUCH OF CENTRAL AND PART OF WESTERN NEBRASKA. MAINLY EAST OF A PINERIDGE-IMPERIAL LINE. COOLER AIR SETTLE ACROSS THE AREA FOR THURSDAY. UPPER LEVEL TROUGH WILL SWING ACROSS THE NORTHERN ROCKIES WITH SW FLOW AHEAD OF THE TROUGH. MOISTURE IS MARGINAL AND THE MAIN UPPER LEVEL DISTURBANCE SHOULD PUSH ONTO THE HIGH PLAINS LATER IN THE DAY.
MID/UPPER TROUGH OVER NORTHERN MEXICO WILL CONTINUE ON ITS TRACK TO LIFT ACROSS THE REGION TODAY. ALONG WITH DYNAMICS OF PASSING UPPER TROUGH SHOULD BE ENOUGH TO SPUR SOME CONVECTION ACROSS THE REGION. ONE CONCERN THOUGH IS A POTENTIAL DRY LAYER STAYING IN THE LOWER LVLS OFF THE SURFACE THROUGH THE MORNING.
MID LEVEL HEIGHT GRADIENT WILL BEGIN TO TIGHTEN THIS EVENING AHEAD OF AN UPPER LEVEL SHORT WAVE TROUGH MOVING ONTO THE WEST COAST THIS AFTN. HEIGHT GRADIENT WILL BECOME TIGHTEST OVER THE REGION THURSDAY AFTN AND EVENING AS THE UPPER TROUGH CROSSES THE ROCKIES. STRONGER MID LEVEL WINDS ASSOCIATED WITH THIS TROUGH AND TIGHTER GRADIENT WILL MIX DOWN LATE MORNING THROUGH THE AFTN. A WEAK COLD FRONT WILL MOVE INTO THE FCST AREA TONIGHT BECOMING STATIONARY ACROSS THE NERN PART OF THE FCST AREA. NOT OUT OF THE QUESTION TO SEE A BIT OF PRECIP GET TO THE GROUND FROM THE HIGH-BASED CUMULUS BUT CONFIDENCE AND EXPECTED AREAL COVERAGE BOTH LOW. COLD FRONT WILL SLIDE THROUGH THE EXTREME SOUTHERN TEXAS PANHANDLE.
COLD FRONT CURRENTLY EXTENDS FROM NORTHWEST ARKANSAS EASTWARD THROUGH NORTH ALABAMA AND INTO WESTERN NORTH CAROLINA. THIS FRONT HAS BEEN SLOWLY MOVING SOUTH OVERNIGHT BUT WILL START TO MOVE BACK TO THE EAST AS A WARM FRONT. BY THURSDAY ANOTHER COLD FRONT WILL MOVE SOUTH INTO THE OHIO VALLEY AND THE CENTRAL PLAINS. THE COLD FRONT WILL MOVE CLOSER TO THE FORECAST AREA SO THE CHANCE OF THUNDERSTORMS WILL INCREASE.
626 AM CDT WED APR 1 2015 ANALYSIS OF THE 07Z MSL DATA SHOWS LOW PRESSURE CENTERED IN WESTERN SASKATCHEWAN. A TROUGH EXTENDED FROM NORTHEAST WYOMING THROUGH THE NEBRASKA PANHANDLE AND EASTERN COLORADO TO EASTERN NEW MEXICO. THE BOUNDARY LAYER THETA-E SHOWS THE THETA-E RIDGE AXIS ACROSS EASTERN NEBRASKA WITH THE STRONGEST GRADIENT ACROSS MUCH OF CENTRAL AND PART OF WESTERN NEBRASKA. MAINLY EAST OF A PINERIDGE-IMPERIAL LINE. COOLER AIR SETTLE ACROSS THE AREA FOR THURSDAY. UPPER LEVEL TROUGH WILL SWING ACROSS THE NORTHERN ROCKIES WITH SW FLOW AHEAD OF THE TROUGH. MOISTURE IS MARGINAL AND THE MAIN UPPER LEVEL DISTURBANCE SHOULD PUSH ONTO THE HIGH PLAINS LATER IN THE DAY.
TODAY THROUGH THURSDAY NIGHT CURRENT SURFACE MAP SHOWS COLD FRONT MOVING THROUGH EASTERN MONTANA INTO CENTRAL WYOMING. COLD FRONT SLIDES THROUGH WESTERN SOUTH DAKOTA EARLY THIS MORNING. COOLER AND BREEZY FOR THURSDAY AS UPPER TROF MOVE INTO THE NORTHERN PLAINS.
THE LOW LVL RIDGE EXTENDS ACROSS S FL WITH WNW LOW LVL WINDS PROGF TO 15-20 KNOTS AT H9 THIS MORNING DELAYING THE SEA BREEZE ACROSS VOLUSIA COUNTY. THE MORNING LOW STRATUS AND FOG ACROSS SRN AREAS HAS BURNED OFF AND SHOULD SEE HIGHS IN THE LOWER TO MID 80S THIS AFTERNOON. LOW TSTM CHCS KDAB VCNTY 22Z-24Z WITH BACK DOOR FRONTAL TROUGH. A LIGHT EAST FLOW IS FORECAST TO DEVELOP ACROSS THE NORTHERN WATERS LATE AS HIGH PRESSURE STRENGTHENS ALONG THE MID ATLC COAST.
AS EVIDENT BY SURFACE DEWPOINTS ONLY IN THE LOW-40S AT BEST ACROSS MOST OF THE CWA. A COLD FRONT IS EXPECTED TO MOVE INTO THE FORECAST AREA LATE THIS MORNING AND INTO THE AFTERNOON. SO DESPITE THE WARMER TEMPERATURES THE RELATIVE HUMIDITY SHOULD BE HIGHER. BEHIND THE COLD FRONT.
317 PM PDT Wed Apr 1 2015 An upper trough will bring a slight chance of showers to the northern mountains this evening, then breezy north winds tonight into Thursday.
AS THE STALLED FRONT LIFTS BACK TO THE N AS A WARM FRONT. THEREBY DRAGGING AN ATTENDANT COLD FRONT THROUGH THE LOWER MS/TN VALLEY REGIONS. INCREASING CONVERGENCE ALONG THE COLD FRONT COUPLED WITH FAVORABLE WLY/SPEED SHEAR PROFILES SUGGEST THE PROB FOR DAMAGING WIND GUSTS AND LARGE HAIL WITH SOME OF THE STRONGER STORMS. A STRONG DOME OF HIGH PRESSURE IS XPCTED TO SETTLE INTO THE SE REGION IN THE WAKE OF THE FRONTAL PASSAGE. WEAK COLD FRONT HAS PUSHED TO THE SOUTH OF BOTH TERMINALS. WARM FRONT WILL LIFT NEWD RATHER QUICKLY BTWN 02/04-08Z.
449 PM CDT WED APR 1 2015 EXPECT INCREASING CHANCES OF STORMS OVER THE NEXT FEW DAYS AS A STRONGER COLD FRONT AND UPPER LEVEL JET MOVES THROUGH THE MID TO SRN MS VALLEY. TONIGHT EXPECT SOME SHOWERS/STORMS TO LINGER IN THE W/NW DUE TO INCREASING ISENTROPIC LIFT AS THE UPPER RIDGE SLOWLY SLIDES TO THE E. CLOUDS WILL LINGER INTO TONIGHT AND KEEP TEMPS UP IN THE LOW/MID 60S OVERNIGHT. INCREASING WARM AIR ADVECTION AND NEAR ZONAL FLOW ALOFT WILL BRING IN SOME WARMER TEMPS IN THE LOW/MID 80S TOMORROW ACROSS THE REGION.
OF COURSE COOLER TEMPERATURES WILL FOLLOW WITH HIGH TEMPERATURES IN THE 50S AND 60S TODAY. ACCUMULATIONS WILL BE SIGNIFICANTLY REDUCED AS SURFACE TEMPERATURES WILL GENERALLY REMAIN ABOVE FREEZING AND THE RELATIVELY HIGH SUN ANGLE WILL CONTINUE TO WARM THE SURFACE CAUSING MORE MELTING. AS THE SUN SETS THURSDAY EVENING AND TEMPERATURES DIP BELOW FREEZING.
959 AM EDT WED APR 1 2015 HIGH PRESSURE WILL REMAIN OVERHEAD TODAY BEFORE MOVING OFF THE COAST TONIGHT AND THURSDAY.
133 PM EDT WED APR 1 2015 HIGH PRESSURE OVER THE AREA WILL MOVE EAST TONIGHT AND ALLOW LOW PRESSURE TO MOVE ACROSS ONTARIO. THE LOW WILL FORCE A WARM FRONT ACROSS THE AREA THURSDAY. A COLD FRONT WILL FOLLOW THURSDAY NIGHT.
/ISSUED 406 AM EDT WED APR 1 2015/ HIGH PRESSURE IN CONTROL OF THE PATTERN FOR THE REMAINDER OF THE WEEK.
AND A LEESIDE TROUGH WILL DEVELOP AND STRENGTHEN NORTH OF THE PANHANDLES. THE POSITION AND STRENGTH OF THE TROUGH AND ITS ASSOCIATED WEAK LOW LEVEL CONVERGENCE WILL BE A MAJOR FACTOR FOR THE POSSIBILITY OF CONVECTION TO DEVELOP /AS IT IS FOR THE FIRE WEATHER CONCERNS/.
SFC OBS SHOW A WARM FRONT ACROSS ARKANSAS AND MISSISSIPPI SLOWLY MOVING NORTHWARD. SHORT TERM MODELS REALLY DO NOT INDICATE ANY CONVECTION UNTIL AFTER 12Z ACROSS THE WRN MIDDLE TN AS THAT WARM FRONT REALLY GETS INTO OUR WRN AREAS AND THE LOW- LEVEL JET STARTS TO KICK IN TOWARDS MORNING. HIGH PRESSURE WILL BRING VFR WX THROUGH TODAY WITH MAINLY E WINDS 5-10KT. A WARM FRONT WILL LIFT INTO THE REGION WITH INCREASING CLOUDS AND WINDS BECOMING S 10-15KT.
125 PM EDT WED APR 1 2015 HIGH PRESSURE CENTER BEHIND A FRONT WILL BRIEFLY RIDGE INTO THE AREA TONIGHT. THE HIGH WILL BE OFF THE COAST THURSDAY WITH AN ONSHORE FLOW INTO THE FORECAST AREA. A WARM FRONT WILL ALSO BE JUST SOUTH OF THE AREA THURSDAY. HIGHS IN THE LOWER 70S NORTH. WITH THE FRONT SOUTH OF THE AREA AND WITH HIGH PRESSURE MOVING ACROSS THE REGION. THE MAIN UPPER LEVEL RIDGE WILL ALSO BE PUSHING INTO AND ACROSS THE AREA OVERNIGHT. USED THE GUIDANCE CONSENSUS FOR THE LOW TEMPERATURE FORECAST. HIGH PRESSURE OFF THE COAST WILL DIRECT AN ONSHORE FLOW INTO THE FORECAST AREA THROUGH THURSDAY NIGHT. THE MODELS DISPLAY A WARM FRONT IN GEORGIA WITH ISENTROPIC UPGLIDE IN THE FORECAST AREA.
AN AREA OF HIGH PRESSURE IS CURRENTLY ANALYZED ACROSS SOUTH AND CENTRAL FLORIDA WITH A LARGER AND MORE TRANSIENT HIGH EXPANDING FROM THE GREAT LAKES TOWARDS THE MID ATLANTIC. THE LOW TEMPERATURE IN KEY WEST DIPPED TO 56 DEGREES. THIS SET THE LOW DAILY TEMPERATURE RECORD FOR APRIL FIRST IN KEY WEST.
BILLINGS WRIGHT LOW CLOUDS WILL DEVELOP AND EXPAND EARLY THIS MORNING AS WARM FRONT/RICHER GULF MOISTURE MOVES NORTHWARD. THUS FORCING A COLD FRONT SOUTHWARD ACROSS THE CENTRAL PLAINS. THE STORMS SHOULD QUICKLY FORM INTO A LINE ALONG THE SURFACE COLD FRONT.
1148 AM EDT WED APR 1 2015 HIGH PRESSURE WILL BUILD INTO OUR REGION TODAY AND SLOWLY MOVE OFFSHORE ON THURSDAY. A WARM FRONT WILL MOVE NORTHWARD THROUGH OUR AREA THURSDAY NIGHT.
UPPER AIR ANALYSIS LAST EVENING SHOWED A SHALLOW TROUGH MOVING INTO WEST TEXAS WITH A WEAK RIDGE OVER OUR PART OF THE STATE. AT THE SURFACE AN AREA OF LOW PRESSURE WAS MOVING ACROSS NORTHERN MEXICO AND WINDS AHEAD OF THIS LOW WERE GENERALLY FROM THE SOUTH. THE UPPER LEVEL TROUGH WILL MOVE ACROSS TEXAS TODAY AND TONIGHT AND THE PATTERN WILL BECOME ZONAL BY THURSDAY. AS THE TROUGH MOVES ACROSS THERE WILL BE A CHANCE FOR SHOWERS AND THUNDERSTORMS.
WILL ACCOMPANY A COLD FRONT EARLY TOMORROW AM NEAR GAG/WWR.
A DRY COOL AIRMASS HAS SPREAD OVER UTAH TODAY BEHIND A COLD FRONT. HIGH PRESSURE ALOFT WILL RETURN AT THE END OF THE WEEK. THE THREAT OF FREEZING TEMPS COULD BEGIN AS EARLY AS TONIGHT NORTH OF ABOUT SLC ALTHO THIS IS DEPENDENT ON THE AMOUNT OF CLOUD COVER. FREEZING TEMPS WILL BE MORE WIDESPREAD THU NIGHT WITH AN EVEN COLDER AIRMASS IN PLACE AS SKIES CLEAR OUT.
301 PM EDT WED APR 1 2015 HIGH PRESSURE WILL BUILD SHIFT OFFSHORE THROUGH THURSDAY.
northern branch wave now working through the northern Rockies with trailing cold front extending southwest through the Intermountain West.
406 AM EDT WED APR 1 2015 HIGH PRESSURE IN CONTROL OF THE PATTERN FOR THE REMAINDER OF THE WEEK.
421 PM CDT WED APR 1 2015 THIS AFTERNOON AN UPPER SHORT WAVE TROUGH OF LOW PRESSURE WAS MOVING ACROSS THE AREA AND PRODUCING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS. THE TIGHT PRESSURE GRADIENT BETWEEN THE HIGH AND LOW PRESSURE SYSTEMS WILL BE PROVIDING ELEVATED WINDS OVERNIGHT AND THROUGH THURSDAY.
THIS TROUGH WILL WEAKEN AS IT APPROACHES AND PUSHES THROUGH THE LOWER MISSISSIPPI RIVER VALLEY LATER TODAY INTO TONIGHT. RIDGING BUILDING EAST THROUGH THE REGION WILL CAUSE THE BOUNDARY PLAGUING THE NORTHERN HALF OF THE CWA TO LIFT NORTH AND OUT OF THE FORECAST AREA. DESPITE THE TROUGH WEAKENING AS IT APPROACHES AND MOVES THROUGH THE CWA.
AS THE STALLED FRONT LIFTS BACK TO THE N AS A WARM FRONT. THEREBY DRAGGING AN ATTENDANT COLD FRONT THROUGH THE LOWER MS/TN VALLEY REGIONS. INCREASING CONVERGENCE ALONG THE COLD FRONT COUPLED WITH FAVORABLE WLY/SPEED SHEAR PROFILES SUGGEST THE PROB FOR DAMAGING WIND GUSTS AND LARGE HAIL WITH SOME OF THE STRONGER STORMS. A STRONG DOME OF HIGH PRESSURE IS XPCTED TO SETTLE INTO THE SE REGION IN THE WAKE OF THE FRONTAL PASSAGE.
632 AM EDT WED APR 1 2015 HIGH PRESSURE BUILDS IN TONIGHT BEHIND AN EXITING COLD FRONT. HIGH PRESSURE WEDNESDAY. WARM FRONT MOVES THROUGH EARLY THURSDAY.
615 PM EDT WED APR 1 2015 HIGH PRESSURE WILL BUILD IN FROM THE WEST TONIGHT AND CREST OVER THE REGION THURSDAY. A WARM FRONT WILL APPROACH FROM THE SOUTHWEST THURSDAY EVENING.
TO THE LOW 50S AT FORT MADISON AND KEOKUK. THE COLD FRONT WILL REMAIN WELL TO THE WEST THROUGH 00Z. THE COLD FRONT THEN STALLS OUT TO OUR SOUTH.
INSTABILITY AND MODEST MOISTURE WITH THE UPPER TROUGH NOW OVER THE ESPECIALLY IN NRN ZONES.
A FEW STORMS MAY DEVELOP OVER NORTH FLORIDA THIS AFTERNOON ALONG THE SEA BREEZE WITH AFTERNOON TEMPS REACHING THE LOWER TO MID 80S. OTHERWISE, THE BEST CHANCE FOR CONVECTION WILL BE OUR EASTERNMOST ZONES IN THE REGION OF COOLER MID-LEVEL TEMPERATURES AND GREATER INSTABILITY.
AN UPPER TROUGH WILL BRING SHOWERS AND COOL WEATHER TODAY. SHOWERS WILL DIMINISH THURSDAY AS WEAK HIGH PRESSURE BUILDS OVER THE AREA.
640 AM EDT WED APR 1 2015 HIGH PRESSURE CENTERED OVER OHIO THIS MORNING WILL BUILD EAST OVER THE REGION TODAY. THURSDAY WILL TURN MUCH WARMER AHEAD OF AN APPROACHING. ALBEIT SLOW MOVING COLD FRONTAL BOUNDARY.
AND WILL LIFT SLOWLY TO THE NORTHEAST AS A WARM FRONT THIS AFTERNOON. UPPER LEVEL RIDGING ACROSS THE MIDSOUTH AHEAD OF AN UPPER LEVEL SHORT WAVE APPROACHING FROM THE WEST WILL HELP TO LIMIT THE THREAT SOME. AFTERNOON TEMPERATURES WILL WARM INTO THE 70S AREA WIDE WITH WINDS INCREASING FROM THE SOUTH AS THE WARM FRONT LIFTS NORTHWARD. COLD FRONT CURRENTLY EXTENDS FROM NORTHWEST ARKANSAS EASTWARD THROUGH NORTH ALABAMA AND INTO WESTERN NORTH CAROLINA. THIS FRONT HAS BEEN SLOWLY MOVING SOUTH OVERNIGHT BUT WILL START TO MOVE BACK TO THE EAST AS A WARM FRONT. BY THURSDAY ANOTHER COLD FRONT WILL MOVE SOUTH INTO THE OHIO VALLEY AND THE CENTRAL PLAINS. THE COLD FRONT WILL MOVE CLOSER TO THE FORECAST AREA SO THE CHANCE OF THUNDERSTORMS WILL INCREASE.
A RIDGE AT THE SURFACE REMAINS STRETCHED FROM CENTRAL FL ACROSS THE NORTHERN GULF COAST THIS AFTERNOON. ALOFT A WEAK MID LVL RIDGE IS SHIFTING EAST WHILE A MODEST SHORT WAVE OVER TX APPROACHES. WITH THE DEPARTING OF THE UPPER RIDGING AND INCOMING DISTURBANCE A FEW SHOWERS AND STORMS HAVE DEVELOPED WITH AFTERNOON HEATING.
311 AM CDT Wed Apr 1 2015 Strengthening southerly flow will develop across central Illinois today ahead of low pressure deepening eastward into the northern Plains and upper Midwest. Warm advection in the southerly flow will result in temperatures reaching the low 70s most areas, with mid 70s from around Springfield to Peoria westward. Aside from scattered high clouds, the day should be mostly sunny as significant lift and instability with the approaching low/cold front hold off until overnight. Tightening pressure gradient ahead of approaching cold front will keep the winds and associated WAA up a bit overnight.
542 AM EDT WED APR 1 2015 HIGH PRESSURE WILL BUILD OVER THE REGION TODAY WITH FAIR AND COOL CONDITIONS. THURSDAY WILL BE WARMER AHEAD OF A NEW FRONTAL SYSTEM APPROACHING FROM THE MIDWEST. HIGH PRESSURE WILL BUILD EAST FROM OHIO THIS MORNING AND FURTHER DIMINISH THE ALREADY LIGHT NW BREEZE. HIGH PRESSURE MIGRATES EAST AND OVER THE AREA LATE TODAY AND TONIGHT.
/ISSUED 330 AM CDT Wed Apr 1 2015/ The amplification/expansion of the 85h thermal ridge will largely modulate the increasing temperature trend thru Thur. Weakish wly mid level flow today will serve to induce pressure falls of 4-8mb/12hrs to result in a broad lee trof with surface winds sw-w by late afternoon. Said thermal ridge will be displaced farther e Thur and increases from 21-24C Wed to 22-25C Thur.
DAYTIME TEMPERATURES WILL WARM SLIGHTLY BY THE END OF THE WEEK AS HIGH PRESSURE BUILDS OVER THE AREA.
353 PM EDT WED APR 1 2015 CURRENT CONDITIONS ACROSS THE AREA FEATURE HIGH PRESSURE SLOWLY MOVING OFF TO THE EAST AS UPPER LEVEL CLOUD COVER MOVES INTO KENTUCKY AND THE OH VALLEY REGION. MID LEVEL RIDGING OVER THE SOUTHEASTERN CONUS SEEM TO KEEP THE MAIN AXIS FOR THE HEAVIER PRECIP OVER CENTRAL AND WESTERN KENTUCKY THROUGH THE THURSDAY TIME PERIOD BUT WILL STILL BRING GOOD CHANCE POPS INTO THE AREA WITH SOME DECENT INSTABILITY IN PLACE.
CURRENT SFC OBS ALREADY SHOWING AREA OF LOW PRESSURE ORGANIZING OVER THE NRN PLAINS ALONG WITH GULF MOISTURE. LATEST RAP13 IS PLACING THE LEADING EDGE OF THE COLD FRONT MOVING INTO THE NRN CWA AROUND 21Z WITH STOUT LLVL THETA-E ADV RACING UP AHEAD OF THE BNDRY. RAP13 IS SUGGESTING THAT EFFECTIVE SHEAR WILL BE ON THE LOW END FOR PRODUCING SEVERE STORMS AND SUSPECT THE HAIL THREAT WILL BE ISOLATED IN NATURE.
333 PM CDT WED APR 1 2015 FINAL STAGE OF THE UPPER RIDGE BREAKDOWN IS UNDERWAY AS LARGE UPPER LOW PROGRESSES EWD ACROSS THE NORTHERN ROCKIES AND SOUTHERN CANADA. SEVERAL PV ANOMALIES ARE NOTED IN WATER VAPOR IMAGERY ASSOCIATED WITH THE UPPER LOW. A COLD FRONT CONTINUES TO MAKE ITS WAY SOUTHEAST THROUGH THE AREA LATE THIS AFTERNOON. PROGRESSIVE UPPER PATTERN IS IN PLACE ACRSS THE CONUS AS UPPER LOW SLIDES EWD ACROSS SRN CANADA FOR THE NEXT 7 DAYS.
1018 AM EDT WED APR 1 2015 HIGH PRESSURE TODAY. WARM FRONT MOVES THROUGH EARLY THURSDAY.
331 AM PDT Wed Apr 1 2015 Cooler but still slightly warmer than normal today with a chance of showers across the northern mountains.
A PERIOD OF RAIN AND POTENTIALLY THUNDERSTORMS IS EXPECTED EARLY THURSDAY MORNING THROUGH THURSDAY EVENING AS A COLD FRONT SWEEPS THROUGH LOWER MICHIGAN. COOLER AIR FILTERS BACK IN THURSDAY NIGHT BEHIND THE COLD FRONT.
400 AM PDT WED APR 1 2015 A WEAK TROUGH OF LOW PRESSURE WILL MOVE INLAND THROUGH CALIFORNIA TODAY MAINTAINING STRONGER ONSHORE FLOW WITH CONTINUED INLAND COOLING.
738 AM EDT WED APR 1 2015 HIGH PRESSURE CENTERED OVER OHIO THIS MORNING WILL BUILD EAST OVER THE REGION TODAY. THURSDAY WILL TURN MUCH WARMER AHEAD OF AN APPROACHING. ALBEIT SLOW MOVING COLD FRONTAL BOUNDARY.
617 PM EDT WED APR 1 2015 HIGH PRESSURE CENTERED OVER THE EASTERN GREAT LAKES WILL CONTINUE TO MOVE EAST OVERNIGHT. AN AREA OF LOW PRESSURE WILL MOVE ACROSS ONTARIO ON THURSDAY. A WARM FRONT FROM THE LOW WILL LIFT NORTH ACROSS THE AREA TOMORROW AND WILL BE FOLLOWED BY A COLD FRONT DURING THE EVENING.
COOLER AIR WILL MOVE IN BEHIND THE FRONT THIS EVENING AND THREAT FOR SEVERE WEATHER WILL END BY 06Z.
AN UPPER TROUGH WILL BRING SHOWERS AND COOL WEATHER TONIGHT. SHOWERS WILL DIMINISH THURSDAY AS WEAK HIGH PRESSURE BUILDS OVER THE AREA.
THE LOW CLOUDS AND FOG THAT DEVELOPED EARLY THIS MORNING HAS DISSIPATED. MODEL FORECASTS THE HIGHEST CAPE AND INSTABILITY ACROSS WEST ALABAMA THIS AFTERNOON.
331 PM EDT WED APR 1 2015 HIGH PRESSURE WILL BUILD SHIFT OFFSHORE THROUGH THURSDAY.