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C Center (runway identification) or Degrees Celsius (Centigrade) CA Cloud-Air Lightning or California CAA Cold Air Advection CADAS Centralized Automated Data Acquisition System CAPE Convective Available Potential Energy CAPPI Constant Altitude PPI. CARIB Caribbean CASCDS Cascades CAT Category or Clear Air Turbulence CAVOK Visibility, cloud and present weather better than prescribed values or conditions CAVU Ceiling and visibility unlimited Cb or CB Cumulonimbus Cloud CBMAM Cumulonimbus Mammatus CBS Cumulonimbi Cc or CC Cirrocumulus CC Cloud-Cloud Lightning CCA (or CCB, CCC ... etc, in sequence) Corrected meteorological message (message type designator) CCL Convective Condensation Level CCLDS Clear of clouds CCLKWS Counter-clockwise CCSL Cirrocumulus Standing Lenticular CD Climatological Data CDA NOAA or NESDIS Command and Data Acquisition (CDA) Station CDC Climate Diagnostics Center CDFNT Cold front CDFNTL Cold frontal CEM Civil Emergency Message CFP Cold front passage CFS Cubic Feet per Second CG Cloud-Ground Lightning CHC Chance CHCS Chances CHG Change CHGD Changed CHGG Changing CHGS Changes CHSPK Chesapeake Ci or CI Cirrus CIG Ceiling CIGS Ceilings CIN Convective Inhibition CISK Conditional Instability of the Second Kind. CLA Clear type of ice formation CLD Cloud CLDNS Cloudiness CLDS Clouds CLKWS Clockwise CLR Clear CLRG Clearing CLRS Clears CM Centimeter CMPLX Complex CNCL Cancel CNCLD Canceled CNCLG Cancelling CNCLS Cancels CNDN Canadian CNFDC Confidence CNIF Calibration Network Information Files CNL Cancel or canceled CNTR Center CNTRD Centered CNTRL Central CNTRLN Centerline CNTRS Centers CNTY County CNTYS Counties CNVG Converge CNVGG Converging CNVGNC Convergence CNVTN Convection CNVTV Convective CNVTVLY Convectively CO Colorado COE An acronym for Corps of Engineers COM Communications COMPAR Compare COMPARD Compared COMPARG Comparing COMPARS Compares COND Conditions CONS Continuous CONSHELF Continental Shelf CONT Continue(s) or continued CONTD Continued CONTDVD Continental Divide CONTG Continuing CONTLY Continually CONTRAILS Condensation Trails CONTS Continues CONUS Continental United States COOR Co-ordinate or co-ordination COORD Coordinate COR Correction COT At the coast COV Cover or covered or covering CPBL Capable CPC Climate Prediction Center CPHC Central Pacific Hurricane Center CR Composite Reflectivity CRC Composite Reflectivity Contour CRC Circle CRCLC Circulate CRCLN Circulation CRNR Corner CRNRS Corners CRP Critical Rainfall Probability CRS Course Cs or CS Cirrostratus CS Combined Shear CSC Combined Shear Contour CSDR Consider CSDRBL Considerable CSI Conditional Symmetric Instability CST Coast CSTL Coastal CT Connecticut or Cross Totals CTGY Category CTSKLS Catskills Cu or CU Cumulus. CUF Cumuliform CUFRA Cumulus Fractus CVR Cover CVRD Covered CVRG Covering CVRS Covers CW Cloud-Water Lightning or Continuous Wave CWA County Warning Area CWF Coastal Marine Forecasts CYC Cyclonic CYCLGN Cyclogenesis
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