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Rev 2 Apr/2004 KMD 250 Pilot's Guide
Appendix B
Wx Abbreviations
TRMTS Terminates
TRNSP Transport
TRNSPG Transporting
TROF Trough
TROFS Troughs
TROP Tropopause
TRPCD Tropical continental
air mass
TRPCL Tropical
TRRN Terrain
TRSN Transition
TRW Thunderstorm
TRW+ Thunderstorm with
heavy rain shower
TS Thunderstorm
(METAR)
TS + Thunderstorm with
heavy snow
TSFR Transfer
TSFRD Transferred
TSFRG Transferring
TSFRS Transfers
TSHWR Thundershower
TSNO Thunderstorm infor-
mation not available
TSNT Transient
TSQLS Thundersquall
TSTM Thunderstorm
TSW Thunderstorm with
snow showers
TSW+ Thunderstorm with
heavy snow showers
TURBC Turbulence
TURBT Turbulent
TWD Toward
TWDS Towards
TWI Twilight
TWR Tower
TWRG Towering
TX Texas
UA Pilot weather reports
UDDF Up- and downdrafts
UN Unable
UNAVBL Unavailable
UNEC Unnecessary
UNKN Unknown
UNL Unlimited
UNRELBL Unreliable
UNRSTD Unrestricted
UNSATFY Unsatisfactory
UNSBL Unseasonable
UNSTBL Unstable
UNSTDY Unsteady
UNSTL Unsettle
UNSTLD Unsettled
UNUSBL Unusable
UP Unknown precipita-
tion (used only by
automated sites
incapable of discrimi-
nation)
UPDFTS Updrafts
UPR Upper
UPSLP Upslope
UPSTRM Upstream
URG Urgent
USBL Usable
UT Utah
UTC Universal Time
Coordinate
UUA Urgent PIREP
Weather Reports
UVV Upward vertical
velocity
UWNDS Upper winds
V Varies
VA Virginia or Volcanic
Ash
VAAC Volcanic Ash
Advisory Center
VAAS Volcanic Ash
Advisory Statement
VAD Velocity azimuth
display
VAL Valley
VARN Variation
VC Vicinity
Common Weather Abbreviations
Appendix B 8/13/07 10:02 AM Page B-19