2-66
Section 2
FIS Operation
Understanding Weather Reports
Rev 4 Aug/2007
KMD 250 Pilot's Guide
NOTE: Only reported at those locations with certified RVR reporting
capability.
7.
Significant Present Weather:
TSRA
TS
is a two letter designation for thunderstorm. Other possible des-
ignations could be as follows:
BC
Patches
BL
Blowing
DR
Low Drifting
FZ
Supercooled/Freezing
MI
Shallow
PR
Partial
SH
Showers
The second two letter designator,
RA,
indicates moderate rain.
Moderate is indicated by the absence of a “+”, “-” or “VC” preceding
the designation. These preceding designations represent the fol-
lowing:
+
Heavy
-
Light
VC
In the vicinity
Other possible designations could be as follows:
BR
Mist
DS
Dust Storm
DU
Widespread Dust
DZ
Drizzle
FC
Funnel Cloud
+FC Tornado/Water Spout
FG
Fog
FU
Smoke
GR
Hail
GS
Small Hail/Snow Pellets
HZ
Haze
IC
Ice Crystals
PE
Ice Pellets
PO
Dust/Sand Whirls
PY
Spray
SA
Sand
SG
Snow Grains
SN
Snow
SQ
Squall
SS
Sandstorm
UP
Unknown Precipitation (Automated Observations)
VA
Volcanic Ash
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