Template:Tropical cyclone numbering/testcases

Numbering (mobile)[edit]

Tropical Cyclone Numbering^[1]^[2]^[3]
Basin(s)	Warning Center	Format	Example
N Atlantic	NHC	nn (nnL)^[a]	06 (06L)
NE Pacific (E of 140°W)	NHC	nnE	09E
NC Pacific (E of IDL, W of 140°W)	CPHC	nnC	02C
NW Pacific (W of IDL)	JMA	yynn (nn, Tyynn)^[b]	1330 (30, T1330)
NW Pacific (W of IDL)	JTWC	nnW	10W
N Indian (Bay of Bengal)	IMD	BOB nn	BOB 03
N Indian (Bay of Bengal)	JTWC	nnB	05B
N Indian (Arabian Sea)	IMD	ARB nn	ARB 01
N Indian (Arabian Sea)	JTWC	nnA	02A
SW Indian (W of 90°E)	MFR	nn (REnn)^[c]	07 (RE07)
SW Indian & Australian reg. (W of 135°E)	JTWC	nnS	01S
Australian reg. (E of 90°E, W of 160°E)	BOM	nnU	08U
Australian reg. & S Pacific (E of 135°E)	JTWC	nnP	04P
S Pacific (E of 160°E)	FMS	nnF	11F
S Atlantic	NRL, NHC^[d]	nnQ	01Q
S Atlantic	UKMet	nnT^[e]	02T
Notes: ^ Although the NHC does not append any suffix to TC numbers of North Atlantic-basin cyclones, the ATCF-defined suffix L is explicitly appended to them by JTWC and non-US-based weather services like UKMet, to avoid ambiguity with numbers from other warning centers tracking other basins. (The L suffix is explicitly used, however, by NHC for other non-cyclonic systems in N Atlantic, like invests.) ^ yy indicates the last two digits of a year and is often omitted for non-English usages. The prefix T is only used for the best track data and technical reports by JMA.^[4]^[5] ^ MFR assigns prefix RE only for its best track data pages.^[6] Historically, weather website Australia Severe Weather added prefix MFR- to MFR-tracked cyclone numbers (like "MFR-07") to distinguish them from JTWC numbers;^[7] this practice is no longer done. ^ Although the NHC does not issue warnings for the South Atlantic basin, it has tracked tropical systems there in the past, in coordination with the NRL's Marine Meteorological Division.^[8] ^ Although UKMet does not issue warnings for the South Atlantic basin, it does assign suffix T to it since 2004, but only for cyclones without US track data.^[7]^[9]

Numbering (desktop)[edit]

Tropical Cyclone Numbering^[1]^[2]^[3]
Basin(s)	Warning Center	Format	Example
N Atlantic	NHC	nn (nnL)^[a]	06 (06L)
NE Pacific (E of 140°W)	NHC	nnE	09E
NC Pacific (E of IDL, W of 140°W)	CPHC	nnC	02C
NW Pacific (W of IDL)	JMA	yynn (nn, Tyynn)^[b]	1330 (30, T1330)
NW Pacific (W of IDL)	JTWC	nnW	10W
N Indian (Bay of Bengal)	IMD	BOB nn	BOB 03
N Indian (Bay of Bengal)	JTWC	nnB	05B
N Indian (Arabian Sea)	IMD	ARB nn	ARB 01
N Indian (Arabian Sea)	JTWC	nnA	02A
SW Indian (W of 90°E)	MFR	nn (REnn)^[c]	07 (RE07)
SW Indian & Australian reg. (W of 135°E)	JTWC	nnS	01S
Australian reg. (E of 90°E, W of 160°E)	BOM	nnU	08U
Australian reg. & S Pacific (E of 135°E)	JTWC	nnP	04P
S Pacific (E of 160°E)	FMS	nnF	11F
S Atlantic	NRL, NHC^[d]	nnQ	01Q
S Atlantic	UKMet	nnT^[e]	02T
Notes: ^ Although the NHC does not append any suffix to TC numbers of North Atlantic-basin cyclones, the ATCF-defined suffix L is explicitly appended to them by JTWC and non-US-based weather services like UKMet, to avoid ambiguity with numbers from other warning centers tracking other basins. (The L suffix is explicitly used, however, by NHC for other non-cyclonic systems in N Atlantic, like invests.) ^ yy indicates the last two digits of a year and is often omitted for non-English usages. The prefix T is only used for the best track data and technical reports by JMA.^[4]^[5] ^ MFR assigns prefix RE only for its best track data pages.^[6] Historically, weather website Australia Severe Weather added prefix MFR- to MFR-tracked cyclone numbers (like "MFR-07") to distinguish them from JTWC numbers;^[7] this practice is no longer done. ^ Although the NHC does not issue warnings for the South Atlantic basin, it has tracked tropical systems there in the past, in coordination with the NRL's Marine Meteorological Division.^[8] ^ Although UKMet does not issue warnings for the South Atlantic basin, it does assign suffix T to it since 2004, but only for cyclones without US track data.^[7]^[9]

Almost all tropical and subtropical cyclones, even if not developed enough to be formally assigned names, are assigned numbers by the warning centers tasked with monitoring them.

For example, systems (tropical, subtropical, or even potential tropical) forming in the North Atlantic and North Pacific basins (in an official manner), as well as those originating in other areas (in an unofficial basis) serving United States government interests (both civilian and military), are assigned tropical cyclone numbers (or TC numbers for short) by the National Hurricane Center, the Central Pacific Hurricane Center, and the Joint Typhoon Warning Center. A TC number is a two-digit number (starting each year/season with "01" and running upwards) followed by (except for the North Atlantic basin) a suffix letter corresponding to the basin of origin (like "E" for Eastern Pacific, "C" for Central Pacific, and "W" for Western Pacific);^[1] the number is often spelled-out in English (like "ONE", sometimes appended with a hyphen and the basin suffix as in "ONE-E") for the purpose of generating a placeholder name for a (sub)tropical depression or an otherwise yet-unnamed storm (especially in JTWC-tracked areas where differences in wind scales result in one agency upgrading the system to a storm without the other following suit).

Examples of TC numbers are PTC 08 for a North Atlantic potential tropical cyclone EIGHT, TD 21E for an East Pacific tropical depression TWENTYONE-E, and SD 03C for a Central Pacific subtropical depression THREE-C. TC numbers are hard-limited to a maximum of "49" by the Automated Tropical Cyclone Forecasting System; however, the NHC and the CPHC usually limit this to "30";^[10] also, TC numbers are not recycled until the next year/season. This numbering system is similar to that used for invests, except invests are numbered from "90" to "99" (which are rotated and recycled within the same year/season) and explicitly specify suffix "L" for North Atlantic systems.

Tropical Cyclone Numbering^[1]^[2]^[3]
Basin(s)	Warning Center	Format	Example
N Atlantic	NHC	nn (nnL)^[a]	06 (06L)
NE Pacific (E of 140°W)	NHC	nnE	09E
NC Pacific (E of IDL, W of 140°W)	CPHC	nnC	02C
NW Pacific (W of IDL)	JMA	yynn (nn, Tyynn)^[b]	1330 (30, T1330)
NW Pacific (W of IDL)	JTWC	nnW	10W
N Indian (Bay of Bengal)	IMD	BOB nn	BOB 03
N Indian (Bay of Bengal)	JTWC	nnB	05B
N Indian (Arabian Sea)	IMD	ARB nn	ARB 01
N Indian (Arabian Sea)	JTWC	nnA	02A
SW Indian (W of 90°E)	MFR	nn (REnn)^[c]	07 (RE07)
SW Indian & Australian reg. (W of 135°E)	JTWC	nnS	01S
Australian reg. (E of 90°E, W of 160°E)	BOM	nnU	08U
Australian reg. & S Pacific (E of 135°E)	JTWC	nnP	04P
S Pacific (E of 160°E)	FMS	nnF	11F
S Atlantic	NRL, NHC^[d]	nnQ	01Q
S Atlantic	UKMet	nnT^[e]	02T
Notes: ^ Although the NHC does not append any suffix to TC numbers of North Atlantic-basin cyclones, the ATCF-defined suffix L is explicitly appended to them by JTWC and non-US-based weather services like UKMet, to avoid ambiguity with numbers from other warning centers tracking other basins. (The L suffix is explicitly used, however, by NHC for other non-cyclonic systems in N Atlantic, like invests.) ^ yy indicates the last two digits of a year and is often omitted for non-English usages. The prefix T is only used for the best track data and technical reports by JMA.^[4]^[5] ^ MFR assigns prefix RE only for its best track data pages.^[6] Historically, weather website Australia Severe Weather added prefix MFR- to MFR-tracked cyclone numbers (like "MFR-07") to distinguish them from JTWC numbers;^[7] this practice is no longer done. ^ Although the NHC does not issue warnings for the South Atlantic basin, it has tracked tropical systems there in the past, in coordination with the NRL's Marine Meteorological Division.^[8] ^ Although UKMet does not issue warnings for the South Atlantic basin, it does assign suffix T to it since 2004, but only for cyclones without US track data.^[7]^[9]

References[edit]

^ ^a ^b ^c ^d Office of the Federal Coordinator for Meteorological Services and Supporting Research (May 2017). National Hurricane Operations Plan (PDF) (Report). National Oceanic and Atmospheric Administration. pp. 26–28. Retrieved October 14, 2018.
^ ^a ^b ^c United States Naval Research Laboratory–Monterey, Marine Meteorology Division (2010-06-08). "Best Track/Objective Aid/Wind Radii Format". United States Navy. Retrieved 2018-10-15.{{cite web}}: CS1 maint: multiple names: authors list (link)
^ ^a ^b ^c "Tropical Cyclone Names". Met Office (United Kingdom Meteorological Office). Retrieved 17 October 2018.
^ ^a ^b ^c "RSMC Tokyo - Typhoon Center". Japan Meteorological Agency. Retrieved 19 October 2018.
^ ^a ^b ^c "過去の台風資料" (in Japanese). Japan Meteorological Agency. Retrieved 19 October 2018.
^ ^a ^b ^c "Saisons cycloniques archivées" (in French). Météo-France La Réunion.
^ ^a ^b ^c ^d ^e ^f "Monthly Global Tropical Cyclone Summary March 2004". Australia Severe Weather.
^ ^a ^b ^c "Rare Tropical Cyclone Forms Off Brazil". EarthWeek. Retrieved 18 October 2018.
^ ^a ^b ^c "Observed and forecast tracks: southern hemisphere 2016-17". Met Office (United Kingdom Meteorological Office). Retrieved 17 October 2018.
^ Michael J. Brennan, National Hurricane Center (2017-07-03). "Automated Tropical Cyclone Forecast (ATCF) Data Files / Text Files". National Oceanic and Atmospheric Administration. Retrieved October 14, 2018.

[4] Although the NHC does not append any suffix to TC numbers of North Atlantic-basin cyclones, the ATCF-defined suffix L is explicitly appended to them by JTWC and non-US-based weather services like UKMet, to avoid ambiguity with numbers from other warning centers tracking other basins. (The L suffix is explicitly used, however, by NHC for other non-cyclonic systems in N Atlantic, like invests.)

[7] yy indicates the last two digits of a year and is often omitted for non-English usages. The prefix T is only used for the best track data and technical reports by JMA.^[4]^[5]

[10] MFR assigns prefix RE only for its best track data pages.^[6] Historically, weather website Australia Severe Weather added prefix MFR- to MFR-tracked cyclone numbers (like "MFR-07") to distinguish them from JTWC numbers;^[7] this practice is no longer done.

[12] Although the NHC does not issue warnings for the South Atlantic basin, it has tracked tropical systems there in the past, in coordination with the NRL's Marine Meteorological Division.^[8]

[14] Although UKMet does not issue warnings for the South Atlantic basin, it does assign suffix T to it since 2004, but only for cyclones without US track data.^[7]^[9]

[15] Although the NHC does not append any suffix to TC numbers of North Atlantic-basin cyclones, the ATCF-defined suffix L is explicitly appended to them by JTWC and non-US-based weather services like UKMet, to avoid ambiguity with numbers from other warning centers tracking other basins. (The L suffix is explicitly used, however, by NHC for other non-cyclonic systems in N Atlantic, like invests.)

[16] yy indicates the last two digits of a year and is often omitted for non-English usages. The prefix T is only used for the best track data and technical reports by JMA.^[4]^[5]

[17] MFR assigns prefix RE only for its best track data pages.^[6] Historically, weather website Australia Severe Weather added prefix MFR- to MFR-tracked cyclone numbers (like "MFR-07") to distinguish them from JTWC numbers;^[7] this practice is no longer done.

[18] Although the NHC does not issue warnings for the South Atlantic basin, it has tracked tropical systems there in the past, in coordination with the NRL's Marine Meteorological Division.^[8]

[19] Although UKMet does not issue warnings for the South Atlantic basin, it does assign suffix T to it since 2004, but only for cyclones without US track data.^[7]^[9]

[21] Although the NHC does not append any suffix to TC numbers of North Atlantic-basin cyclones, the ATCF-defined suffix L is explicitly appended to them by JTWC and non-US-based weather services like UKMet, to avoid ambiguity with numbers from other warning centers tracking other basins. (The L suffix is explicitly used, however, by NHC for other non-cyclonic systems in N Atlantic, like invests.)

[22] yy indicates the last two digits of a year and is often omitted for non-English usages. The prefix T is only used for the best track data and technical reports by JMA.^[4]^[5]

[23] MFR assigns prefix RE only for its best track data pages.^[6] Historically, weather website Australia Severe Weather added prefix MFR- to MFR-tracked cyclone numbers (like "MFR-07") to distinguish them from JTWC numbers;^[7] this practice is no longer done.

[24] Although the NHC does not issue warnings for the South Atlantic basin, it has tracked tropical systems there in the past, in coordination with the NRL's Marine Meteorological Division.^[8]

[25] Although UKMet does not issue warnings for the South Atlantic basin, it does assign suffix T to it since 2004, but only for cyclones without US track data.^[7]^[9]

[OFCM_NHOP-1] Office of the Federal Coordinator for Meteorological Services and Supporting Research (May 2017). National Hurricane Operations Plan (PDF) (Report). National Oceanic and Atmospheric Administration. pp. 26–28. Retrieved October 14, 2018.

[ATCF_Format-2] United States Naval Research Laboratory–Monterey, Marine Meteorology Division (2010-06-08). "Best Track/Objective Aid/Wind Radii Format". United States Navy. Retrieved 2018-10-15.{{cite web}}: CS1 maint: multiple names: authors list (link)

[UKMet-3] "Tropical Cyclone Names". Met Office (United Kingdom Meteorological Office). Retrieved 17 October 2018.

[JMA_Eng-5] "RSMC Tokyo - Typhoon Center". Japan Meteorological Agency. Retrieved 19 October 2018.

[JMA_Jpn-6] "過去の台風資料" (in Japanese). Japan Meteorological Agency. Retrieved 19 October 2018.

[MFR-RE-8] "Saisons cycloniques archivées" (in French). Météo-France La Réunion.

[ASW_032004-9] ^ ^a ^b ^c ^d ^e ^f "Monthly Global Tropical Cyclone Summary March 2004". Australia Severe Weather.

[EarthWeekBrazilCyclone-11] "Rare Tropical Cyclone Forms Off Brazil". EarthWeek. Retrieved 18 October 2018.

[UKMet_SH2016-17-13] "Observed and forecast tracks: southern hemisphere 2016-17". Met Office (United Kingdom Meteorological Office). Retrieved 17 October 2018.

[ATCF_Readme-20] Michael J. Brennan, National Hurricane Center (2017-07-03). "Automated Tropical Cyclone Forecast (ATCF) Data Files / Text Files". National Oceanic and Atmospheric Administration. Retrieved October 14, 2018.

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