Derek Ortt wrote:question about French reporting of winds:
Why do they use 10 minutes for the Indian Ocean, but in their advisories, use 1 minute for the Atlantic? Isnt that a major descrepency, or does the Al have a designation where all winds are 1 minute and not 10 min? (I know France issues advisories for the Atl as well since there are many French Islands that are considered to be a part of the overseas departments, and not colonies)
The French use 10 minute averages as we do with MetArea I. However for tropical cyclones in the RSMC Miami area do they not just copy the forecast into the MetArea forecast? In that case they would just have to state they were one minute averages, unless they convert to ten minute averages.
110kts but forecast to reach 115kts.
ZCZC 180
WTIO30 FMEE 280622 CCA
*************** CORRECTIVE **************
RSMC / TROPICAL CYCLONE CENTRE / LA REUNION
TROPICAL CYCLONE FORECAST WARNING (SOUTH-WEST INDIAN OCEAN)
0.A WARNING NUMBER : 22/10/20052006
1.A INTENSE TROPICAL CYCLONE 10 (CARINA)
2.A POSITION 2006/02/28 AT 0600 UTC :
16.5S / 78.6E
(SIXTEEN DECIMAL FIVE DEGREES SOUTH AND SEVENTY EIGHT DECIMAL SIX
DEGREES
EAST)
3.A DVORAK ANALYSIS : 6.5/6.5 /D 1.5/24 H
4.A CENTRAL PRESSURE : 915 HPA
5.A MAX AVERAGE WIND SPEED (10 MN) : 110 KT
6.A EXTENSION OF WINDS BY QUADRANTS (KM):
30 KT NE: 350 SE: 450 SO: 400 NO: 350
50 KT NE: 090 SE: 110 SO: 110 NO: 090
7.A FIRST CLOSED ISOBARE (PRESSURE / AVERAGE DIAM): 1004 HPA / 600 KM
8.A VERTICAL EXTENSION OF CYCLONE CIRCULATION: DEEP
1.B FORECASTS:
12H: 2006/02/28 18 UTC: 16.9S/77.9E, MAX WIND=115KT, INTENSE TROP.
CYCL..
24H: 2006/03/01 06 UTC: 17.5S/76.9E, MAX WIND=115KT, INTENSE TROP.
CYCL..
36H: 2006/03/01 18 UTC: 18.0S/76.0E, MAX WIND=110KT, INTENSE TROP.
CYCL..
48H: 2006/03/02 06 UTC: 18.6S/75.0E, MAX WIND=105KT, INTENSE TROP.
CYCL..
60H: 2006/03/02 18 UTC: 19.0S/74.2E, MAX WIND=090KT, INTENSE TROP.
CYCL..
72H: 2006/03/03 06 UTC: 19.6S/73.2E, MAX WIND=080KT, TROPICAL
CYCLONE.
2.B OTHER INFORMATIONS:
"CARINA" KEEPS ON INTENSIFYING GRADUALLY, IT HAS TRACKED
SOUTHWESTWARDS
DURING THE LAST HOURS.
THE SYSTEM IS EXPECTED TO TRACK MAINLY SOUTHWESTWARDS ON THE NORTHERN
EDGE OF THE SUBTROPICAL HIGH PRESSURES BUILDING IN THE SOUTH, THEN TO
SLOW DOWN AS THE HIGH PRESSURES STRENGTHEN IN THE SOUTHWEST.THE
ENVIRONMENT REMAINS FAVOURABLE AT THE BEGINING OF THE RANGE.=
NNNN