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2023 Severe Tropical Cyclone ILSA (2023099S11128)


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Storm track - Intensity - Wind Radii - Intensity Data - Source Data - All data

Summary Information

Storm ID 2023099S11128
Start Apr 8 18Z
Landfall Apr 13 18Z
Max Intensity 128 kt (Apr 13 06Z), 929 mb (Apr 13 06Z)
End Apr 13 18Z
ATCF IDs SI182023
Track status PROVISIONAL. Track from operational data. This will be upgraded to 'best track' quality after reanalysis

Storm track plot

Map of storm track

Intensity plots

Map of storm track

Radial wind information

Map of storm track

Position and Intensity Table

BASIN ISO_TIME_________ NATURE LAT LON USA WIND USA PRES
degrees north degrees east kts mb
SI 2023-04-08 18:00:00 NR -11.30 128.20 35 1000
SI 21:00:00 NR -11.62 127.71 37 999
SI 2023-04-09 00:00:00 NR -11.90 127.20 39 999
SI 03:00:00 NR -12.11 126.65 42 998
SI 06:00:00 NR -12.30 126.10 45 998
SI 09:00:00 NR -12.54 125.58 45 997
SI 12:00:00 NR -12.80 125.10 45 997
SI 15:00:00 NR -13.06 124.63 45 997
SI 18:00:00 NR -13.30 124.20 45 997
SI 21:00:00 NR -13.52 123.77 48 996
SI 2023-04-10 00:00:00 NR -13.60 123.40 51 995
SI 03:00:00 NR -13.34 123.13 48 996
SI 06:00:00 NR -13.10 122.90 45 998
SI 09:00:00 NR -13.25 122.58 45 997
SI 12:00:00 NR -13.50 122.30 45 997
SI 15:00:00 NR -13.61 122.21 48 996
SI 18:00:00 NR -13.70 122.10 51 995
SI 21:00:00 NR -13.84 121.71 51 993
SI 2023-04-11 00:00:00 NR -14.00 121.40 51 992
SI 03:00:00 NR -14.13 121.58 52 991
SI 06:00:00 NR -14.30 121.80 54 990
SI 09:00:00 NR -14.56 121.70 57 989
SI 12:00:00 NR -14.90 121.40 60 988
SI 15:00:00 NR -15.35 120.97 70 981
SI 18:00:00 NR -15.70 120.50 80 975
SI 21:00:00 NR -15.74 120.16 80 974
SI 2023-04-12 00:00:00 NR -15.70 119.90 80 974
SI 03:00:00 NR -15.81 119.66 84 969
SI 06:00:00 NR -16.00 119.50 89 965
SI 09:00:00 NR -16.23 119.48 94 960
SI 12:00:00 NR -16.50 119.50 99 956
SI 15:00:00 NR -16.79 119.42 102 954
SI 18:00:00 NR -17.10 119.30 105 953
SI 21:00:00 NR -17.37 119.21 110 948
SI 2023-04-13 00:00:00 NR -17.70 119.10 115 944
SI 03:00:00 NR -18.19 118.86 121 936
SI 06:00:00 NR -18.70 118.70 128 929
SI 09:00:00 NR -19.10 118.81 128 929
SI 12:00:00 NR -19.50 119.10 128 929
SI 15:00:00 NR -19.98 119.48 121 936
SI 18:00:00 NR -20.50 119.90 115 944

Source Information

Agency Information
USA BOTH_tcvitals.txt:Line=13079
TOKYO
CMA
HKO
NEWDELHI
REUNION
BOM
NADI
WELLINGTON
DS824
TD9636
TD9635
NEUMANN
MLC

All available IBTrACS Data

SEASON BASIN SUBBASIN ISO_TIME_________ NATURE LAT LON DIST2LAND LANDFALL IFLAG USA AGENCY USA ATCF_ID USA LAT USA LON USA WIND USA PRES USA SSHS USA R34 USA POCI USA ROCI USA RMW STORM SPEED STORM DIR
Year degrees north degrees east km km degrees north degrees east kts mb 1 nmile mb nmile nmile kts degrees
2023 SI WA 2023-04-08 18:00:00 NR -11.30 128.20 208 208 O_____________ tcvitals SI182023 -11.30 128.20 35 1000 0 1007 180 35 12 236
2023 SI WA 21:00:00 NR -11.62 127.71 254 213 P_____________ SI182023 -11.62 127.71 37 999 0 1007 190 40 12 239
2023 SI WA 2023-04-09 00:00:00 NR -11.90 127.20 213 190 O_____________ tcvitals SI182023 -11.90 127.20 39 999 0 65,85,70,65 1007 200 45 12 245
2023 SI WA 03:00:00 NR -12.11 126.65 193 184 P_____________ SI182023 -12.11 126.65 42 998 0 57,82,65,40 1006 200 45 11 250
2023 SI WA 06:00:00 NR -12.30 126.10 189 171 O_____________ tcvitals SI182023 -12.30 126.10 45 998 0 50,80,60,15 1006 200 45 11 247
2023 SI WA 09:00:00 NR -12.54 125.58 176 164 P_____________ SI182023 -12.54 125.58 45 997 0 57,75,65,35 1006 200 45 11 243
2023 SI WA 12:00:00 NR -12.80 125.10 172 165 O_____________ tcvitals SI182023 -12.80 125.10 45 997 0 65,70,70,55 1006 200 45 11 241
2023 SI WA 15:00:00 NR -13.06 124.63 172 171 P_____________ SI182023 -13.06 124.63 45 997 0 65,82,80,55 1006 200 45 10 240
2023 SI WA 18:00:00 NR -13.30 124.20 181 179 O_____________ tcvitals SI182023 -13.30 124.20 45 997 0 65,95,90,55 1006 200 45 10 241
2023 SI WA 21:00:00 NR -13.52 123.77 194 194 P_____________ SI182023 -13.52 123.77 48 996 0 67,100,97,62 1007 195 37 8 249
2023 SI WA 2023-04-10 00:00:00 NR -13.60 123.40 224 224 O_____________ tcvitals SI182023 -13.60 123.40 51 995 0 70,105,105,70 1008 190 30 6 286
2023 SI WA 03:00:00 NR -13.34 123.13 269 269 P_____________ SI182023 -13.34 123.13 48 996 0 67,102,97,67 1008 190 30 7 316
2023 SI WA 06:00:00 NR -13.10 122.90 299 299 O_____________ tcvitals SI182023 -13.10 122.90 45 998 0 65,100,90,65 1008 190 30 6 280
2023 SI WA 09:00:00 NR -13.25 122.58 321 316 P_____________ SI182023 -13.25 122.58 45 997 0 60,90,85,70 1007 190 30 7 236
2023 SI WA 12:00:00 NR -13.50 122.30 326 318 O_____________ tcvitals SI182023 -13.50 122.30 45 997 0 55,80,80,75 1007 190 30 5 225
2023 SI WA 15:00:00 NR -13.61 122.21 325 318 P_____________ SI182023 -13.61 122.21 48 996 0 55,77,80,72 1007 185 25 3 224
2023 SI WA 18:00:00 NR -13.70 122.10 324 317 O_____________ tcvitals SI182023 -13.70 122.10 51 995 0 55,75,80,70 1007 180 20 5 244
2023 SI WA 21:00:00 NR -13.84 121.71 328 318 P_____________ SI182023 -13.84 121.71 51 993 0 55,75,80,70 1006 153 20 7 246
2023 SI WA 2023-04-11 00:00:00 NR -14.00 121.40 322 302 O_____________ tcvitals SI182023 -14.00 121.40 51 992 0 55,75,80,70 1006 126 20 3 204
2023 SI WA 03:00:00 NR -14.13 121.58 302 273 P_____________ SI182023 -14.13 121.58 52 991 0 67,82,75,67 1006 126 20 5 128
2023 SI WA 06:00:00 NR -14.30 121.80 273 253 O_____________ tcvitals SI182023 -14.30 121.80 54 990 0 80,90,70,65 1006 126 20 5 165
2023 SI WA 09:00:00 NR -14.56 121.70 248 240 P_____________ SI182023 -14.56 121.70 57 989 0 72,72,60,62 1006 126 20 7 213
2023 SI WA 12:00:00 NR -14.90 121.40 240 239 O_____________ tcvitals SI182023 -14.90 121.40 60 988 0 65,55,50,60 1006 126 20 11 222
2023 SI WA 15:00:00 NR -15.35 120.97 239 239 P_____________ SI182023 -15.35 120.97 70 981 1 65,60,55,60 1005 158 17 12 227
2023 SI WA 18:00:00 NR -15.70 120.50 247 247 O_____________ tcvitals SI182023 -15.70 120.50 80 975 1 65,65,60,60 1005 190 14 9 243
2023 SI WA 21:00:00 NR -15.74 120.16 273 273 P_____________ SI182023 -15.74 120.16 80 974 1 65,67,62,60 1005 190 14 6 270
2023 SI WA 2023-04-12 00:00:00 NR -15.70 119.90 300 300 O_____________ tcvitals SI182023 -15.70 119.90 80 974 1 65,70,65,60 1005 190 14 5 261
2023 SI WA 03:00:00 NR -15.81 119.66 313 313 P_____________ SI182023 -15.81 119.66 84 969 2 72,92,82,72 1005 190 14 5 232
2023 SI WA 06:00:00 NR -16.00 119.50 322 312 O_____________ tcvitals SI182023 -16.00 119.50 89 965 2 80,115,100,85 1005 190 14 4 201
2023 SI WA 09:00:00 NR -16.23 119.48 312 300 P_____________ SI182023 -16.23 119.48 94 960 2 90,107,95,85 1005 185 14 5 178
2023 SI WA 12:00:00 NR -16.50 119.50 300 294 O_____________ tcvitals SI182023 -16.50 119.50 99 956 3 100,100,90,85 1006 180 14 6 187
2023 SI WA 15:00:00 NR -16.79 119.42 300 294 P_____________ SI182023 -16.79 119.42 102 954 3 102,97,90,87 1005 215 12 6 198
2023 SI WA 18:00:00 NR -17.10 119.30 302 296 O_____________ tcvitals SI182023 -17.10 119.30 105 953 3 105,95,90,90 1005 250 10 6 198
2023 SI WA 21:00:00 NR -17.37 119.21 296 267 P_____________ SI182023 -17.37 119.21 110 948 3 105,97,92,97 1005 237 10 6 198
2023 SI WA 2023-04-13 00:00:00 NR -17.70 119.10 267 213 O_____________ tcvitals SI182023 -17.70 119.10 115 944 4 105,100,95,105 1005 225 10 9 203
2023 SI WA 03:00:00 NR -18.19 118.86 213 162 P_____________ SI182023 -18.19 118.86 121 936 4 112,102,92,105 1005 207 7 11 201
2023 SI WA 06:00:00 NR -18.70 118.70 162 116 O_____________ tcvitals SI182023 -18.70 118.70 128 929 4 120,105,90,105 1005 190 5 9 183
2023 SI WA 09:00:00 NR -19.10 118.81 116 67 P_____________ SI182023 -19.10 118.81 128 929 4 120,105,90,105 1005 190 5 9 155
2023 SI WA 12:00:00 NR -19.50 119.10 67 22 O_____________ tcvitals SI182023 -19.50 119.10 128 929 4 120,105,90,105 1005 190 5 11 144
2023 SI WA 15:00:00 NR -19.98 119.48 11 0 P_____________ SI182023 -19.98 119.48 121 936 4 102,100,80,87 1004 165 5 13 143
2023 SI WA 18:00:00 NR -20.50 119.90 0 O_____________ tcvitals SI182023 -20.50 119.90 115 944 4 85,95,70,70 1004 140 5 13 143