Storm Activity: Jul 17, 2021 - Jul 21, 2021
Jul 21 · 00:00 GMT 35 mph 1,007 mb Tropical Low
| Jul 21 | 00:00 GMT | 18.5 | -127.2 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 21:00 GMT | 18.66 | -126.51 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 18:00 GMT | 18.8 | -125.8 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 15:00 GMT | 18.91 | -125.07 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 12:00 GMT | 19 | -124.3 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 09:00 GMT | 19.06 | -123.52 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 06:00 GMT | 19.1 | -122.7 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 03:00 GMT | 19.16 | -121.87 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 20 | 00:00 GMT | 19.2 | -121 | 35 mph | 1,007 mb | Tropical Low | -- |
| Jul 19 | 21:00 GMT | 19.22 | -120.05 | 35 mph | 1,006 mb | Tropical Storm | -- |
| Jul 19 | 18:00 GMT | 19.2 | -119.1 | 40 mph | 1,006 mb | Tropical Storm | -- |
| Jul 19 | 15:00 GMT | 19.11 | -118.21 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 19 | 12:00 GMT | 19 | -117.4 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 19 | 09:00 GMT | 18.9 | -116.68 | 40 mph | 1,004 mb | Tropical Storm | -- |
| Jul 19 | 06:00 GMT | 18.8 | -116 | 40 mph | 1,004 mb | Tropical Storm | -- |
| Jul 19 | 03:00 GMT | 18.71 | -115.29 | 45 mph | 1,002 mb | Tropical Storm | -- |
| Jul 19 | 00:00 GMT | 18.6 | -114.6 | 50 mph | 1,001 mb | Tropical Storm | -- |
| Jul 18 | 21:00 GMT | 18.46 | -113.99 | 55 mph | 1,000 mb | Tropical Storm | -- |
| Jul 18 | 18:00 GMT | 18.3 | -113.4 | 60 mph | 999 mb | Tropical Storm | -- |
| Jul 18 | 15:00 GMT | 18.11 | -112.79 | 55 mph | 1,000 mb | Tropical Storm | -- |
| Jul 18 | 12:00 GMT | 17.9 | -112.2 | 50 mph | 1,001 mb | Tropical Storm | -- |
| Jul 18 | 09:00 GMT | 17.69 | -111.68 | 50 mph | 1,002 mb | Tropical Storm | -- |
| Jul 18 | 06:00 GMT | 17.5 | -111.2 | 45 mph | 1,003 mb | Tropical Storm | -- |
| Jul 18 | 03:00 GMT | 17.35 | -110.75 | 45 mph | 1,004 mb | Tropical Storm | -- |
| Jul 18 | 00:00 GMT | 17.2 | -110.3 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 17 | 21:00 GMT | 17.01 | -109.81 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 17 | 18:00 GMT | 16.8 | -109.3 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 17 | 15:00 GMT | 16.56 | -108.82 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 17 | 12:00 GMT | 16.3 | -108.3 | 40 mph | 1,005 mb | Tropical Storm | -- |
| Jul 17 | 09:00 GMT | 16.01 | -107.68 | 35 mph | 1,005 mb | Tropical Depression | -- |
| Jul 17 | 06:00 GMT | 15.7 | -107 | 35 mph | 1,006 mb | Tropical Depression | -- |
| Jul 17 | 03:00 GMT | 15.36 | -106.3 | 30 mph | 1,006 mb | Tropical Depression | -- |
| Jul 17 | 00:00 GMT | 15 | -105.6 | 30 mph | 1,007 mb | Tropical Depression | -- |
Learn more about Tropical Storm Guillermo and the 2021 Eastern Pacific hurricane season in our hurricane archive.
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