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The October cyclone was difficult to classify, consisting of a small area of very strong (~50 kt sustained) winds embedded within a much broader environment of low pressure that was itself producing gale/tropical-storm-force winds, at least early on. The inner system possessed some of the essential characteristics of a tropical storm: it had sustained winds in excess of 34 kt, it had a well-defined center of circulation, it had a warm core, at least in the lower troposphere, and the low center itself did not lie along any frontal boundaries, at least at the time the center moved onshore. In particular, the strength, distribution, and impacts of the winds near the center of this system were indistinguishable from many other small tropical storms.
Other attributes of the system, however, argued against its classification as a tropical storm. The system's convection near the core was intermittent and of short duration, and was considered too transient to satisfy the definition's organized deep convection requirement. The transient nature of the strong inner core circulation itself also cast doubt as to whether it could be considered of synoptic scale. The vertical extent of the cyclonic circulation was limited to below about 12,000 ft, very uncharacteristic of a tropical cyclone of this strength.
We also considered whether the system should be classified as a subtropical cyclone. There were clearly mixed characteristics of extratropical and tropical cyclones present, including the presence nearby of an upper-level cold low, and the large-scale distribution of winds and convection. However, there was enough air mass contrast associated with the system to raise doubts as to whether it was truly non-frontal. The very small radius of maximum winds and occasional convection very near the center also made the system difficult to classify as a subtropical cyclone.
Nature does not always cooperate with the classification systems designed by man. There is a continuum of cyclone types in the real atmosphere, and it is often difficult to place these systems into the small number of bins that meteorologists have created for them. The 9-10 October Florida system is certainly one of these difficult cyclones. NHC’s historical record, however, requires its members to belong to either the “tropical” or “subtropical” bins, and our view in this case is that neither applies. It is simply “something else”.
RECORD EVENT REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
315 PM CDT THU NOV 24 2011
...RECORD HIGH TEMPERATURE SET IN GRAND FORKS AND FARGO
THIS AFTERNOON...
RECORD HIGH TEMPERATURES FOR THIS DATE HAVE BEEN SET AT THE GRAND
FORKS/NWS...MARK ANDREWS GRAND FORKS INTERNATIONAL AIRPORT AND FARGO
HECTOR FIELD.
THE MERCURY REACHED 55 DEGREES EARLIER THIS AFTERNOON AT THE WEATHER
FORECAST OFFICE IN GRAND FORKS. THIS BREAKS THE PREVIOUS RECORD OF 54
DEGREES SET IN 1984.
A HIGH OF 56 DEGREES WAS OBSERVED AT THE AIRPORT. THE PREVIOUS
RECORD WAS 53 DEGREES LAST SET IN 1984.
THE HIGH TEMPERATURE RECORDED AT FARGO THIS AFTERNOON WAS 57 DEGREES.
THIS BREAKS THE PREVIOUS HIGH OF 56 DEGREES REGISTERED IN 1984.
THE ABOVE IS ONLY PRELIMINARY AND SUBJECT TO MINOR CHANGES.
RECORD EVENT REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
300 PM CDT WED NOV 23 2011
...RECORD HIGH TEMPERATURE SET IN GRAND FORKS THIS AFTERNOON...
RECORD HIGH TEMPERATURES FOR THIS DATE HAVE BEEN SET AT THE GRAND
FORKS/NWS AND MARK ANDREWS GRAND FORKS INTERNATIONAL
AIRPORT...FEATURING THE BYRON DORGAN TERMINAL FACILITY.
THE MERCURY REACHED 56 DEGREES EARLIER THIS AFTERNOON AT THE
WEATHER FORECAST OFFICE. THIS BREAKS THE PREVIOUS RECORD OF 51
DEGREES SET IN 1984.
A HIGH OF 58 DEGREES WAS OBSERVED AT THE AIRPORT. THE PREVIOUS RECORD
WAS 52 DEGREES SET IN 1972.
THE ABOVE IS ONLY PRELIMINARY AND SUBJECT TO MINOR CHANGES.
I am happy to announce that I completed my first solo flight today in Grand Forks. It was cold, and there was ice around the airport, but three landings and it was done.You can fly aircraft?
