Case Study 1: Meteorological Evaluation for Calgary, Alberta for 21 January
In this report, all temperatures are in degrees Celsius, and visibilities in kilometers.
Throughout most of the day 21 January, light snow fell continuously through much of southern Alberta, southwest Saskatchewan and northern Montana. As the day progressed the snow area moved slowly southward, with snow ending in Calgary by 1400 Local Standard Time (LST). This snow occurred to the rear of a cold front which had passed through Calgary between 0300 and 0400 LST on 19 January. Prior to this event, over the period from 13 through 15 January, 3.4 centimeters of snow had fallen and was followed by a period of time where the temperature was above freezing for a part of each day.
Case Study 2: Measured precipitation totals at Calgary International Airport:
Snow from the 13th, 14th and 15th of January totaled 3.4 centimeters. The lowest amount of snow reported on the ground at anytime from the13th through the 22nd of January at 0500 LST was a trace on the 18th, 19th and 20th. A trace indicates less than .5 centimeters of snow on the ground. During that time, the snow likely partially melted during the day and some of the melted snow refroze as ice at night. Because at least a trace of snow was reported each morning, the snow and the water resulting from snow melt from the 16th through the 19th of January, had not completely sublimated/evaporated prior to the commencement of the precipitation event on 19 January.
Case Study 3
The scope of the project is to review the rain events near a switching yard, which is located in South Seattle close to Safeco Field. The goal is to determine if excessive amounts of rain occurred on 1-10- and the days leading up to 1-10- and to make a statement concerning the possibility of standing water in the area. We reviewed and analyzed rainfall data from 12-19- to 1-10- from the official weather stations at Seattle Boeing Field and Seattle Tacoma Airport, the two closest stations to the Stacy switching yard. We also reviewed the official climate data from the following US government agencies: NOAA Regional Climate Centers, Applied Climate Information Systems, and Western Regional Climate Center.