17 Jan 2025 - 16:14 EST
17 Jan 2025 - 21:14 UTC

Post-tropical Cyclone Guillermo at 18.7°N - 126.5°W

North Pacific Ocean

Last observation: 02 Jun 2023 - 13:35 UTC

« 2021 Storms »

17 Jul 2021 - 20 Jul 2021

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PTC Guillermo - RGB Loops
PTC Guillermo - Channel Loops

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NHC Storm Description:

20 Jul 2021 - 21:00 UTC ...GUILLERMO BECOMES A POST-TROPICAL REMNANT LOW... ...THIS IS THE LAST ADVISORY... As of 2:00 PM PDT Tue Jul 20 the center of Guillermo was located near 18.7, -126.5 with movement W at 17 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

20 Jul 2021 - 15:00 UTC ...GUILLERMO EXPECTED TO BECOME A REMNANT LOW LATER TODAY... As of 8:00 AM PDT Tue Jul 20 the center of Guillermo was located near 19.2, -125.0 with movement W at 17 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

More storm history

20 Jul 2021 - 9:00 UTC ...GUILLERMO LIKELY TO BECOME A REMNANT LOW LATER TODAY... As of 2:00 AM PDT Tue Jul 20 the center of Guillermo was located near 19.0, -123.4 with movement W at 17 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

20 Jul 2021 - 3:00 UTC ...GUILLERMO EXPECTED TO BECOME A REMNANT LOW ON TUESDAY... As of 8:00 PM PDT Mon Jul 19 the center of Guillermo was located near 19.3, -122.0 with movement W at 18 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

19 Jul 2021 - 21:00 UTC ...POORLY ORGANIZED GUILLERMO BECOMES A DEPRESSION... As of 2:00 PM PDT Mon Jul 19 the center of Guillermo was located near 19.3, -119.8 with movement W at 17 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

19 Jul 2021 - 15:00 UTC ...GUILLERMO WEAKENS FURTHER... ...EXPECTED TO BECOME A DEPRESSION SOON... As of 5:00 AM HST Mon Jul 19 the center of Guillermo was located near 19.1, -117.8 with movement W at 15 mph. The minimum central pressure was 1005 mb with maximum sustained winds of about 40 mph.

19 Jul 2021 - 9:00 UTC ...POORLY-ORGANIZED GUILLERMO WEAKENS SOME MORE... As of 11:00 PM HST Sun Jul 18 the center of Guillermo was located near 18.8, -116.8 with movement W at 15 mph. The minimum central pressure was 1003 mb with maximum sustained winds of about 45 mph.

19 Jul 2021 - 3:00 UTC ...GUILLERMO WEAKENS SLIGHTLY OVER THE OPEN PACIFIC... As of 5:00 PM HST Sun Jul 18 the center of Guillermo was located near 18.9, -115.6 with movement W at 15 mph. The minimum central pressure was 1001 mb with maximum sustained winds of about 50 mph.

18 Jul 2021 - 21:00 UTC ...GUILLERMO A LITTLE BIGGER...FASTER...STRONGER... As of 3:00 PM MDT Sun Jul 18 the center of Guillermo was located near 18.7, -113.8 with movement WNW at 14 mph. The minimum central pressure was 999 mb with maximum sustained winds of about 60 mph.

18 Jul 2021 - 15:00 UTC ...GUILLERMO FORECAST TO TURN WESTWARD AND STRENGTHEN A LITTLE DURING THE NEXT DAY OR SO... As of 9:00 AM MDT Sun Jul 18 the center of Guillermo was located near 17.9, -112.5 with movement WNW at 12 mph. The minimum central pressure was 1000 mb with maximum sustained winds of about 50 mph.

18 Jul 2021 - 9:00 UTC ...GUILLERMO STRENGTHENS... As of 3:00 AM MDT Sun Jul 18 the center of Guillermo was located near 17.6, -111.6 with movement WNW at 12 mph. The minimum central pressure was 1000 mb with maximum sustained winds of about 50 mph.

18 Jul 2021 - 3:00 UTC ...LARGE GUILLERMO REMAINS DISORGANIZED AS IT HEADS AWAY FROM SOUTHWESTERN MEXICO... As of 9:00 PM MDT Sat Jul 17 the center of Guillermo was located near 17.5, -111.1 with movement WNW at 13 mph. The minimum central pressure was 1004 mb with maximum sustained winds of about 40 mph.

17 Jul 2021 - 21:00 UTC ...DEPRESSION STRENGTHENS INTO TROPICAL STORM GUILLERMO WELL OFFSHORE THE SOUTHWESTERN COAST OF MEXICO... As of 3:00 PM MDT Sat Jul 17 the center of Guillermo was located near 17.1, -110.1 with movement WNW at 14 mph. The minimum central pressure was 1004 mb with maximum sustained winds of about 40 mph.

17 Jul 2021 - 15:00 UTC ...NEW TROPICAL DEPRESSIONS FORMS WELL OFFSHORE THE SOUTHWESTERN COAST OF MEXICO... As of 9:00 AM MDT Sat Jul 17 the center of Seven-E was located near 16.8, -109.2 with movement WNW at 17 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.