IRFP-01
Metro Review
(3) Direction arrows
(a) Arrows with barbs or flags indicate area or line
movement
(b) Arrows with number indicate direction and speed of
individual cell within a line or area
NOTE: Arrows are oriented to eight cardinal points of
compass.
(4) Contractions and letters depict the type of surface weather
associated with the echoes
NOTE: A “+” (plus) symbol indicates the intensity of the
echoes are increasing. A “-” (minus) symbol indicates
decreasing intensity.
(5) Dashed line box indicates a forecast weather watch (WW)
area
(a) Valid time and ID number of WW displayed alongside
(b) “WT” denotes tornado watch, “WS” indicates severe
thunderstorms
NOTE: Only forecast information is on the RADAR
Summary Chart; all other information is observed.
(6) If for any reason no echoes were observed, the following
symbols are used to indicate why:
(a) “NE” - No Echo - echo information but none observed
(b) “NA” - Observation Not Available
NOTE: If plotted with station call letters, a report is
available but received too late to plot.
(c) “OM” - Equipment Out for Maintenance
(d) “ROBEPS” - Radar Operating Below Performance
Standards
(8-97) Original
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