| C |
Center (runway indentification) 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 |
Chesepeake |
| 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 |
| CLEGLFGLS |
Great Lakes Marine Synopsis |
| CLEGLOCLE |
Great Lakes Storm Outlook |
| CLEGLSCLE |
Great Lakes Storm Summary |
| CLEICEFBO |
Great Lakes Freeze-Up Outlook or Great Lakes Ice Outlook for the Opening of Navigation |
| CLEICEIO |
Great Lakes 5-Day Ice Outlook |
| 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 cancelled |
| 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 |
