Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.
By: Dr. Jeff Masters, 3:28 PM GMT on August 29, 2014
Hurricane Cristobal ceased to be at 11 am EDT on Friday, as the storm completed its transition to a powerful extratropical storm. Though Cristobal is no longer a hurricane, it still has hurricane-force winds, and will be a threat to marine interests off the Newfoundland coast today, and to Iceland on Sunday night. With Cristobal's transition to an extratropical storm and the demise of the Eastern Pacific's Tropical Storm Marie earlier today, there are now no named t...
Updated: 3:33 PM GMT on August 29, 2014
By: Dr. Jeff Masters, 3:38 PM GMT on August 28, 2014
Hurricane Cristobal continues to churn northeastwards over the Atlantic towards Iceland. Satellite loops show that Cristobal has its most impressive appearance of its lifetime, with a large symmetric area of heavy thunderstorms. Cristobal will merge with a frontal zone on Friday and transition to a powerful extratropical storm that will likely bring tropical storm-force winds and heavy rain to Iceland on Sunday night. The GOES-14 satellite is in rapid-scan mode ove...
By: Dr. Jeff Masters, 5:05 PM GMT on August 27, 2014
(By Steve Gregory - Subbing for Dr. Masters who is on Vacation.)
CRISTOBAL is located about 360NM SE of Cape Hatteras moving North at around 11Kts. The storm remains a minimal hurricane with sustained surface winds around 65Kts. ALL models call for the storm to turn NNE and then NE at an accelerated pace as an upper air, mid-latitude TROF moves into the Northeastern US. While the storm may see some additional intensific...
Updated: 5:22 PM GMT on August 27, 2014
By: Dr. Jeff Masters, 12:25 PM GMT on August 26, 2014
It doesn't look much like hurricane, but the Hurricane Hunters measured surface winds around 75 mph on Monday evening and Tuesday morning in Hurricane Cristobal, making it the third hurricane of the 2014 Atlantic hurricane season. These missions proved the value of hurricane hunter flights, since there is no way that we would have known Cristobal was a hurricane based on satellite data. The storm is stretched out in a long line of heavy thunderstorms, has no eye or...
By: Dr. Jeff Masters, 3:23 PM GMT on August 25, 2014
Tropical Storm Cristobal continues to dump heavy rains over the Central and Southeast Bahamas and Turks and Caicos Islands as the storm heads slowly north-northeastwards out to sea. Satellite loops show that Cristobal is struggling with wind shear, with a center of circulation that is completely exposed to view, and all the heavy thunderstorms pushed to the south and east sides of the center. The shear is expected to relax by Wednesday as a trough of low pressure ca...