200 - Typhoon Committee

TCAR
CHAPTER 1 - TYPHOON COMMITTEE ACTIVITIES 2007
2007
Note: Z: geopotential height U: eastward wind
V: northward wind
T: temperature D: dewpoint depression
H: relative humidity
ω: vertical velocity (: vorticity
ψ: stream function
χ: velocity potential P: sea level pressure R: rainfall
The prefixes µ and σ represent the average and standard
deviations of ensemble prediction results respectively.
The symbols °, *, , §, ‡ and † indicate limitations on
the forecast hours or initial time as shown in the notes
below.
1) 06 and 18 UTC are to be provided after 21 Nov 2007.
Table 2 List of Other Products and
Data on the RSMC Data Serving System
Oct 2007
Data Satellite wind data Typhoon information Wave data Observational data
Content/
frequency
(initial time)
High-density atmospheric
motion vectors (BUFR)
(a) MTSAT-1R
(VIS, IR, WV)
VIS: 00 and 06 UTC
IR, WV: 00, 06, 12
and 18 UTC
(b) METEOSAT-7
(VIS, IR, WV)
VIS: every 1.5 hours
Between 01:30
and 15:00 UTC
IR, WV: every 1.5 hours
Tropical cyclone
Related information
(BUFR)
• tropical cyclone
analysis data
00, 06, 12 and 18
UTC
Global Wave Model
(GRIB)
• significant
wave height
• prevailing
wave period
• wave direction
Forecast hours:
0–84 every 6 hours
(00 UTC)
0–84 every 6 hours
and 96–192 every
12 hours
(12 UTC)
(a) Surface data
(SYNOP, SHIP, BUOY)
Mostly four times a day
(b) Upper-air data
(TEMP, parts A-D)
(PILOT, parts A-D)
Mostly twice a day
b.2 Provision of satellite imagery data through the Internet
In March 2007, JMA extended its service to provide all HRIT imagery for registered National Meteorological and
Hydrological Services (NMHSs) through the Internet as a backup to the direct broadcast. As of 1 November 2007,
21 countries/territories were registered to access the data. JMA also plans to start providing JPEG images over the
Internet by the end of 2007.
b.3 Provision of satellite imagery and NWP products as a WIS prototype service
JMA started providing MTSAT imagery and NWP products transformed for display with Satellite Animation and
Interactive Diagnosis (SATAID) software as a WMO Information System (WIS) prototype service on 27 March
2007. This software can be used to superimpose NWP products onto satellite imagery. As of 1 November 2007, 13
Members of the WMO (six of whom are TC Members) had applied for the service.
b.4 JMA Ensemble Prediction System Website - EPSWEB
Since June 2006, JMA has operated the Ensemble Prediction System Website (EPSWEB) as a pilot project, with the
aim of improving the EPS and increasing the availability of its products to National Meteorological and Hydrological
Services (NMHSs). On this website, weather chart guidance (stamp maps), probability guidance (probability
maps) and time-series point guidance (EPSgrams) are available. In August 2007, JMA renewed EPSWEB and started
providing EPSgrams to WMO Region II (Asia) countries/territories.
b.5 Provision of information under GMDSS
Since 1992, JMA has provided meteorological messages for shipping safety under the framework of the Global
Maritime Distress and Safety System (GMDSS). These messages are broadcast via the two independent systems
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