You are given theaverage monthly distribution of tornadoes,…
Question You are given theaverage monthly distribution of tornadoes,… You are given the average monthly distribution of tornadoes,Image transcription textNumber of Tornadoes in FWD CWA byMonth between 1950-2017 NWS FortWorth, TX Last Updated: … Show more… Show morecalculated from the period 1950-2017, for the forecast area of the National Weather Service in Fort Worth, Texas. The general pattern of this monthly distribution of tornadoes is consistent with what you’ve learned about the occurrence of supercell thunderstorms capable of spawning tornadoes over the Southern Plains However, one curious aspect of this is the relative maximum in October. You are given the climatological average surface wind for SeptemberImage transcription textNCEP / NCAR Reanalysis Surface VectorWind (m/s) Climatology 1981-2010 climoNOAA/ESRL Physical Scien… Show more… Show moreOctober and Novembercomputed from the period 1981-2010. Arrows indicate average direction, while average speeds (in m/s) are color-coded. In light of these charts, order the three months from the one in which low-level warm, moist air masses (mT air masses) have the strongest impact on North Texas to the month in which they have the weakest impact on North Texas. Explain your answer.2. Explain why the presence of low-level warm, moist air (mT air masses) is important for surface-based thunderstorms. 3. You are also given the climatological average 500-mb wind for September Octoberand Novemberalso computed from the period 1981-2010. Arrows indicate average direction, while average speeds (in m/s) are color-coded. Explain the general trend in the strength of 500-mb winds over north Texas from September to November in terms of the seasonal migration of the westerlies aloft. 4. Order the three months from the month with the largest vertical wind shear between the ground and six kilometers over North Texas to the month with the smallest 0-6 km vertical wind shear over North Texas (just consider speed shear). You should use the 500-mb charts as proxies for winds at six kilometers over North Texas. Recall that relatively strong vertical wind shear is important for supercell thunderstorms. 5. Now it’s time to put your answers together. Explain the uptick in tornadoes during October over North Texas in terms of the presence of the two key ingredients explored in this problem. In the process, you should indicate why tornadoes are not as likely in North Texas during September and November (compared to October). Earth Science Science Meteorology ERSC 131 Share QuestionEmailCopy link Comments (0)


