| INFO ON THE NEW TROPICAL STORM FOR 1962 SEASON U.S. Tropical Storm Landfall ---------------------------- 06/30 21Z 35.2N 75.8W 55 kt NC Daily Metadata: June 28: 1. Maps and old HURDAT: HWM and microfilm analyze a stationary front over the western Atlantic at 12Z. June 29: 1. Maps and old HURDAT: HWM analyzes an extratropical cyclone of at most 1015 mb at 32.0N, 77.0W at 12Z. Microfilm shows an extratropical cyclone of at most 1014 mb at 33.3N, 75.0W at 12Z. 2. Ship highlights: 38 kt NE and 1023 mb at 33.5N, 77.6W at 00Z (Frying Pan Shoals, SWO, micro). 35 kt E and 1015 mb at 35.0N, 75.1W at 12Z (COADS). 38 kt ENE and 1021 mb at 33.6N, 77.6W at 18Z (Frying Pan Shoals, SWO, micro). 35 kt E and 1016 mb at 35.4N, 74.1W at 23Z (COADS). 3. Discussion: CLIMO: On June 29 an offshore storm caused torrential rains over the central section of the coast, with very heavy rains extending inland fifty to sixty miles. Cedar Island reported 17 inches in about 18 hours, the second greatest one-day rain in North Carolina weather history. Several stations in that section of the State had their greatest 24-hour rainfall of record and their greatest June total of record. Agricultural losses from the storm rainfall were very high. Reanalysis: A weakening frontal boundary over the western Atlantic led to the formation of an extratropical cyclone early on June 29th off the southeast of the United States. The first position is analyzed at 00Z on June 29th as a 40 kt extratropical cyclone based on synoptic data. June 30: 1. Maps and old HURDAT: HWM analyzes an extratropical cyclone of at most 1005 mb at 35.0N, 75.0W at 12Z. Microfilm shows an extratropical cyclone of at most 1002 mb at 35.5N, 76.2W at 12Z. 2. Ship highlights: 50 kt NW and 1003 mb at 33.7N, 76.7W at 00Z (COADS). 10 kt NW and 1001 mb at 34.3N, 75.9W at 06Z (COADS). 55 kt W and 1008 mb at 34.0N, 76.5W at 12Z (COADS). 40 kt W and 1009 mb at 33.9N, 74.9W at 18Z (COADS). 35 kt SSW and 1006 mb at 35.8N, 74.0W at 23Z (MWL). 3. Land highlights: 21 kt NNW and 1003 mb at Cherry Point, NC at 1058Z (SWO). 20 kt SE and 1002 mb at Cape Hatteras, NC at 12Z (micro). 20 kt W and 1000 mb at Cape Hatteras, NC at 1558Z (SWO). 4. Discussion/Reanalysis: The extratropical cyclone moved northeastward, turning to the north and northwest on June 30th. The system gradually intensified and a couple of ships reported winds of 40 kt on the 29th, 50 kt at 00Z on the 30th and 55 kt at 06Z on the 30th. A ship reported 10 kt NW and 1001 mb at 06Z on the 30th, suggesting a central pressure of 1000 mb, which has been added to the corresponding time slot. Cape Hatteras, NC, reported 20 kt SE and 1002 mb at 12Z on the 30th, suggesting a central pressure of 1000 mb, which was also added to the appropriate time slot. Transition to a tropical storm was gradual and based on the synoptic data, is analyzed to have occurred at 18Z on the 30th. At this time, there was no temperature gradient across the circulation and the strongest winds were about 60 nm from the center. Given that an upper-level low was directly over the system, it may have been a subtropical storm. However, without the availability of satellite images, it is analyzed as a tropical storm. 55 kt is analyzed as the peak intensity. Cape Hatteras, NC, measured 20 kt W and 1000 mb at 1558Z on the 30th suggesting a central pressure of 998 mb, which has been added at 18Z on this day. (A central pressure of 998 mb suggests maximum surface winds of 47 kt from the north of 25N Brown et al. and 52 kt from the north of 35N Landsea et al. pressure-wind relationships. The analyzed intensity at 18Z on the 30th is 55 kt based on the pressure-wind relationship and synoptic data. The tropical storm moved to the southeast late on the 30th making landfall in the Outer Banks of North Carolina. July 1: 1. Maps and old HURDAT: HWM analyzes an extratropical cyclone of at most 1010 mb at 36.0N, 71.0W at 12Z. Microfilm shows a closed low pressure of at most 1002 mb at 36.0N, 73.5W at 12Z. 2. Ship highlights: 6 kt SW and 1000 mb (min P, 6 hourly) at 35.2N, 75.5W (Diamond Shoals) at 00Z (SWO). 50 kt SW and 1006 mb at 34.5N, 74.3W at 00Z (COADS). 35 kt W and 1010 mb at 33.0N, 75.5W at 06Z (COADS). 4 kt NE and 1001 mb at 35.2N 75.5W (Diamond Shoals) at 06Z (SWO). 35 kt NE and 1013 mb at 40.5N, 68.9W at 12Z (micro). 35 kt WSW at 34.7N, 73.0W at 18Z (COADS). 3. Discussion/Reanalysis: An approaching frontal boundary caused the tropical cyclone to move northeastward increasing in forward speed on July 1st. Gales were also reported on the 1st, up to 50 kt. Observations at Diamond Shoals allowed for an analysis of a 999 mb central pressure at 00Z and 1000 mb at 06Z. July 2: 1. Maps and old HURDAT: HWM analyzes an extratropical cyclone of at most 1010 mb at 39.0N, 67.0W at 12Z. Microfilm shows a closed low pressure of at most 1005 mb at 36.7N, 64.3W with a frontal boundary just to the northwest at 12Z. 2. Ship highlights: 35 kt SW and 1008 mb at 34.0N, 66.3W at 12Z (COADS). 35 kt SW and 1009 mb at 34.6N, 62.8W at 18Z (COADS). 3. Discussion/Reanalysis: The tropical storm weakened on July 1st and 2nd as it moved away from the United States. Late on the 2nd, the tropical cyclone interacted with the approaching frontal boundary and transition back to an extratropical cyclone is analyzed at 18Z on the 2nd. July 3: 1. Maps and old HURDAT: HWM analyzes an extratropical cyclone of at most 995 mb at 41.0N, 54.0W at 12Z. Microfilm shows an extratropical cyclone of at most 999 mb at 40.0N, 54.0W at 12Z. 2. Ship highlights: 45 kt NNE and 999 mb at 36.6N, 66.5W at 00Z (COADS). 55 kt (or 25 kt) SE and 1002 mb at 37.5N, 58.5W at 06Z (micro). 45 kt SSE and 996 mb at 40.1N, 53.5W at 12Z (COADS/micro). 35 kt NW and 1003 mb at 42.0N, 53.0W at 18Z (COADS). 3. Discussion/Reanalysis: A ship at 06Z on July 3rd appears in microfilm suggesting 55 kt SE and 1002 mb. It is possible that the reading was 25 kt since the triangle is unfilled and 55 kt appears substantially too high compared to the surrounding ships. The reported pressure also appears inconsistent with the surrounding synoptic data. Because of all the inconsistencies, it is not used in this reanalysis July 4: 1. Maps and old HURDAT: HWM analyzes an occluded extratropical cyclone of at most 1000 mb at 48.0N, 63.0W at 12Z. Microfilm shows a closed low pressure of at most 1005 mb at 47.0N, 63.5W at 12Z. 2. Ship highlights: 40 kt SW and 1005 mb at 46.0N, 51.5W at 00Z (COADS). 40 kt E and 1009 mb at 50.4N, 52.0W at 03Z (COADS). 3. Land highlights: 35 kt NE and 1013 mb at Anticosti Island, Canada at 18Z (micro). 4. Discussion/Reanalysis: The extratropical cyclone moved across Newfoundland on July 4th and across New Brunswick and Nova Scotia on July 5th while performing a large counter-clockwise loop. July 5: 1. Maps and old HURDAT: HWM does not analyze an organized system at 12Z. Microfilm shows a closed low pressure of at most 1008 mb at 47.0N, 64.5W at 12Z. 2. Discussion/Reanalysis: Weakening below gale-force is analyzed at 00Z on the 5th. July 6: 1. Maps and old HURDAT: HWM analyzes an extratropical cyclone of at most 1005 mb at 40.5N, 61.5W (original cyclone appears to have been absorbed) at 12Z. Microfilm shows a closed low pressure of at most 1008 mb at 43.0N, 62.0W at 12Z. 2. Land highlights: 40 kt ESE and 1015 mb at Fatima, Canada at 06Z (micro). 3. Discussion/Reanalysis: A rapidly developing extratropical cyclone approached the weakening system early on July 6th and synoptic data suggests that both merged after 06Z on this day. The last position is analyzed at 06Z on the 6th. Sources: the NHC microfilm maps, the Historical Weather Maps series, the COADS ship database, Mariners Weather Log, Surface Weather Observations, and Local Climatological Data. This disturbance was in Jack Bevens List of Suspects. |