Oklahoma Mesonet Station Detects Intense Cold-Frontal Passage The Oklahoma Mesonet is a network of 108 remote stations (Fig. 1) that monitor the Oklahoma environment on a nearly continuous basis. Each mesonet site records 5-min readings (averages) of air temperature, relative humidity, station pressure, solar radiation, wind speed and direction, and rainfall accumulations. Soil temperatures at 10 cm below sod and bare soil conditions are also measured Mesonet site Locations every 15 min. Selected sites (about half) record 15-min averages of 5-cm tem- peratures below sod and bare soil and 30 cm below sod conditions. An example of the utility and capability of the Oklahoma Mesonet occurred during the recent passage of a cold front. A strong polar cold front moved through Oklahoma on 30 December 1992 producing an abrupt change in wind direction and a marked temperature drop, as revealed by the mesonet station in Norman. The cold front passed the Norman site around 9:45 P.M. CST when wind directions changed from a southerly direction to a northerly direction. During the next 90 min, the air temperature at 1.5 m fell 13.5°C (24.3°F). In 12 h following frontal passage, temperatures dropped a remarkable 25.4°C (45.7°F). A unique aspect of
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Nov 1, 1993
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