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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.41 [2012] >
IJRSP Vol.41(4) [August 2012] >
| Title: | Forecasting and nowcasting convective weather phenomena over southern peninsular India – Part I: Thunderstorms |
| Authors: | Suresh, R |
| Keywords: | Thunderstorm
Rain rate
Velocity spectrum width
Rainfall variability
Thermodynamic stability indices
Sea breeze
Convective available potential energy (CAPE)
Radar reflectivity |
| Issue Date: | Aug-2012 |
| Publisher: | NISCAIR-CSIR, India |
| PACS No.: | 92.60.Wc; 92.60.Qx |
| Abstract: | A few case studies of thunderstorms over
Chennai and its neighbourhood have been discussed with its antecedent
thermodynamic stability indices and parameters that are usually favourable for
the development of convective clouds. As the forecast based on upper air data
(radio sonde / radio wind and /or GPS sonde) is not time as well as location
specific, data obtained from Doppler Weather Radar, Chennai have been used to
issue location / time specific thunderstorm warnings especially for the
aircraft operations from Chennai airport. Monitoring of sea breeze front
propagation and velocity spectrum width data may help the forecaster to nowcast
the development and movement of thunderstorms. Rainfall variability has been
analysed using the radar reflectivity data based rain rate estimation and
precipitation accumulation over a period of time. It is well understood from
this analysis that fully calibrated radar and aptly fine tuned radar
reflectivity (z) – rain rate (R) relationship will address the problem of
inadequacy of rain gauges besides giving a better quality hydrological data
(than that is being obtained through sparsely located surface rain gauges)
which may be quite useful for the administrators and water resources managers. |
| Page(s): | 421-434 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.41(4) [August 2012]
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