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(AWW) is sent before the WW. (WFOs know this
product as a SAW).
EXAMPLE−
Example of an AWW:
MKC AWW 011734
WW 75 TORNADO TX OK AR 011800Z−020000Z
AXIS..80 STATUTE MILES EAST AND WEST OF A
LINE..60ESE DAL/DALLAS TX/ − 30 NW ARG/ WALNUT
RIDGE AR/
AIM 8/5/04
7−1−16 Meteorology
..AVIATION COORDS.. 70NM E/W /58W GGG − 25NW
ARG/
HAIL SURFACE AND ALOFT..1 3/4 INCHES. WIND
GUSTS..70 KNOTS. MAX TOPS TO 450. MEAN WIND
VECTOR 24045.
5. Soon after the AWW goes out, the actual
watch bulletin itself is issued. A WW is in the
following format:
(a) Type of severe weather watch, watch area,
valid time period, type of severe weather possible,
watch axis, meaning of a watch, and a statement that
persons should be on the lookout for severe weather.
(b) Other watch information; i.e., references
to previous watches.
(c) Phenomena, intensities, hail size, wind
speed (knots), maximum cumulonimbus (CB) tops,
and estimated cell movement (mean wind vector).
(d) Cause of severe weather.
(e) Information on updating Convective
Outlook (CA) products.
EXAMPLE−
Example of a WW:
BULLETIN − IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 381
STORM PREDICTION CENTER NORMAN OK
556 PM CDT MON JUN 2 1997
THE STORM PREDICTON CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF NORTHEAST
NEW MEXICO TEXAS PANHANDLE
EFFECTIVE THIS MONDAY NIGHT AND TUESDAY
MORNING FROM 630 PM UNTIL MIDNIGHT CDT.
TORNADOES...HAIL TO 2 3/4 INCHES IN
DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE
POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE
FROM 50 MILES SOUTHWEST OF RATON NEW
MEXICO TO 50 MILES EAST OF AMARILLO TEXAS.
REMEMBER...A TORNADO WATCH MEANS
CONDITIONS ARE FAVORABLE FOR TORNADOES
AND SEVERE THUNDERSTORMS IN AND CLOSE TO
THE WATCH AREA. PERSONS IN THESE AREAS
SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND
LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...
WW 378...WW 379...WW 380
DISCUSSION...THUNDERSTORMS ARE INCREASING
OVER NE NM IN MOIST SOUTHEASTERLY UPSLOPE
FLOW. OUTFLOW BOUNDARY EXTENDS
EASTWARD INTO THE TEXAS PANHANDLE AND
EXPECT STORMS TO MOVE ESE ALONG AND
NORTH OF THE BOUNDARY ON THE N EDGE OF
THE CAP. VEERING WINDS WITH HEIGHT ALONG
WITH INCREASGING MID LVL FLOW INDICATE A
THREAT FOR SUPERCELLS.
AVIATION...TORNADOES AND A FEW SEVERE
THUNDERSTORMS WITH HAIL SURFACE AND
ALOFT TO 2 3/4 INCHES. EXTREME TURBULENCE
AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW
CUMULONIMBI WITH MAXIMUM TOPS TO 550.
MEAN STORM MOTION VECTOR 28025.
6. Status reports are issued as needed to show
progress of storms and to delineate areas no longer
under the threat of severe storm activity. Cancellation
bulletins are issued when it becomes evident that no
severe weather will develop or that storms have
subsided and are no longer severe.
7. When tornadoes or severe thunderstorms
have developed, the local WFO office will issue the
warnings covering those areas.
h. Center Weather Advisories (CWAs)
1. CWAs are unscheduled inflight, flow control,
air traffic, and air crew advisory. By nature of its short
lead time, the CWA is not a flight planning product.
It is generally a nowcast for conditions beginning
within the next two hours. CWAs will be issued:
(a) As a supplement to an existing SIGMET,
Convective SIGMET or AIRMET.
(b) When an Inflight Advisory has not been
issued but observed or expected weather conditions
meet SIGMET/AIRMET criteria based on current
pilot reports and reinforced by other sources of
information about existing meteorological conditions.
(c) When observed or developing weather
conditions do not meet SIGMET, Convective
SIGMET, or AIRMET criteria; e.g., in terms of
intensity or area coverage, but current pilot reports or
other weather information sources indicate that
existing or anticipated meteorological phenomena
will adversely affect the safe flow of air traffic within
the ARTCC area of responsibility.
2. The following example is a CWA issued from
the Kansas City, Missouri, ARTCC. The “3” after
ZKC in the first line denotes this CWA has been
8/5/04 AIM
Meteorology 7−1−17
issued for the third weather phenomena to occur for
the day. The “301” in the second line denotes the
phenomena number again (3) and the issuance
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