Weather Acronyms: M's

M	Mesocyclone, Mach number (followed by figures), or Meters (preceded by figures)
m²/s²	Meters squared per second squared (also m²/S²)
MA	Massachusetts
MAN	Manitoba
MAP	Mean Areal Precipitation or Aeronautical maps and charts
MAR	March
MAREP	Marine Reporting Program
MAX	Maximum
MAY	May
MB or mb	Millibars.
MCC	Mesoscale Convective Complex
MCD	Mesoscale Discussion
MCDW	Monthly Climatic Data of the World
McIDAS	Man-computer Interactive Data Access System.
MCS	Mesoscale Convective System
MCW	Modulated continuous wave
MD	Maryland
MDFY	Modify
MDFYD	Modified
MDFYG	Modifying
MDL	Model
MDLS	Models
MDS	Minimum Discernible Signal
MDT	Moderate
MDTLY	Moderately
ME	Maine
MED	Medium
MEGG	Merging
MESO	Mesocyclone or Mesoscale
MET	Meteorological or meteorology
METAR	Aviation routine weather report (in aeronautical meteorological code)
METRO	Metropolitan
MEX	Mexico
MHKVLY	Mohawk Valley
MI	Michigan
MIC	Meteorologist-In-Charge
Micro-ART	Microcomputer Automatic Radiotheodolite Master Control Unit
MID	Middle
MIDN	Midnight
MIFG	Shallow fog
MIL	Military
MIN	Minutes or Minimum
MISG	Missing
MLCAPE	Mean Layer CAPE
MLLI	Mean Layer Lifted Index
MLLW	Mean Lower Low Water
MLOS	Microwave Line-Of-Site
MLTLVL	Melting level
MLW	Mean Low Water
MN	Minnesota
MNLND	Mainland
MNLY	Mainly
MNM	Minimum
MNT	Monitor or monitoring or monitored
MO	Missouri
MOD	Meteorological Operations Division or Moderate
MOGR	Moderate or greater
MON	Above mountains or Monday
MOS	Model Output Statistics
MOV	Move or moving or movement
MOVD	Moved
MOVG	Moving
MOVMT	Movement
MOVS	Moves
MPC	Marine Prediction Center
MPH	Miles per hour
MPL	Max Parcel Level
MRF	Medium-Range Forecast model
MRGL	Marginal
MRGLLY	Marginally
MRNG	Morning
MRTM	Maritime
MS	Mississippi or Minus
MSG	Message
MSL	Mean Sea Level
MST	Most
MSTLY	Mostly
MSTR	Moisture
MT	Montana or Mountain
MTN	Mountain
MTNS	Mountains
MTU	Metric units
MTW	Mountain waves
MUCAPE	Most Unstable CAPE
MULI	Most Unstable Lifted Index
MULT	Multiple
MULTILVL	Multi-level
MWO	Meteorological watch office
MX	Mixed type of ice formation (white and clear)
MXD	Mixed