NOTE: Dotted line indicates freezing level at
Chart contains legend for clarity
High-level significant weather prognostic chart
NOTE: Meteorologists utilize the low-level
significant Wx Prog chart more than the high-level.
All of the high-level information is available from
other sources, e.g., constant pressure charts. Many
weather offices choose to not receive this facsimile
from the National Weather Service.
Point to southern California on Figure 15.
Refer to the Low-Level Prognostic Chart (Figure 15).
Regarding the south Texas area, what weather
information can be derived?
ANSWER: The offshore and coastal areas are forecast to be
MVFR. Expect improving weather with cold frontal passage.
Winds aloft prognostic chart symbology 18.104.22.168.4
Sg 5, fr 8
Fig 16: Winds Aloft
Wind shafts indicate wind direction
Wind flags, barbs, and half-barbs mounted on
arrow display wind speed
Temperature depicted in degrees C near base
of wind flag