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NASA-CR-2289
Variation of the low level winds during the passage of a thunderstorm gust front
Year: 1973
Abstract: Three time histories of wind profiles in thunderstorm gust fronts at Cape Kennedy and three at Oklahoma City are analyzed. Wind profiles at maximum wind strength below 100 m follow logarithmic laws, so that winds above the surface layer can be estimated from surface winds once the roughness length is known. A statistical analysis of 81 cases of surface winds during thunderstorms at Tampa revealed no predictor with skill to predict the time of maximum gust. Some 34 of the variance of the strength of the gust is accounted for by a stability index and surface wind prior to the gust; the regression equations for these variables are given. The coherence between microscale wind speed variations at the different levels has the same proportions as in non-thunderstorm cases.
Subject: GROUND WIND
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:44:51Z | |
| date available | 2017-09-04T15:44:51Z | |
| date copyright | 01/01/1973 | |
| date issued | 1973 | |
| identifier other | PQHOEEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/47272 | |
| description abstract | Three time histories of wind profiles in thunderstorm gust fronts at Cape Kennedy and three at Oklahoma City are analyzed. Wind profiles at maximum wind strength below 100 m follow logarithmic laws, so that winds above the surface layer can be estimated from surface winds once the roughness length is known. A statistical analysis of 81 cases of surface winds during thunderstorms at Tampa revealed no predictor with skill to predict the time of maximum gust. Some 34 of the variance of the strength of the gust is accounted for by a stability index and surface wind prior to the gust; the regression equations for these variables are given. The coherence between microscale wind speed variations at the different levels has the same proportions as in non-thunderstorm cases. | |
| language | English | |
| title | NASA-CR-2289 | num |
| title | Variation of the low level winds during the passage of a thunderstorm gust front | en |
| type | standard | |
| page | 73 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1973 | |
| contenttype | fulltext | |
| subject keywords | GROUND WIND | |
| subject keywords | METEOROLOGICAL PARAMETERS | |
| subject keywords | PREDICTION ANALYSIS TECHNIQUES | |
| subject keywords | THUNDERSTORMS | |
| subject keywords | VERTICAL DISTRIBUTION | |
| subject keywords | WIND (METEOROLOGY) | |
| subject keywords | WIND PROFILES | |
| subject keywords | WIND SHEAR | |
| subject keywords | WIND VARIATIONS | |
| subject keywords | WIND VELOCITY |