Inter-comparison of physical processes associated with winter and non-winter hailstorms using the weather research and forecasting (WRF) model

Chevuturi, Amulya; Dimri, A. P.

doi:10.1007/s40808-015-0014-5

Cited by 11 publications

(2 citation statements)

References 14 publications

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“…Good agreement trends between observed and simulated values (overestimation/underestimation) are seen at the surface. Chevuturi and Dimri (2015). The model has produced better simulation of these parameters on the day of occurrence (table 3).…”

Section: Surface Wind Slp Rh and Temperature Analysesmentioning

confidence: 99%

Simulation of tornado over Brahmanbaria on 22 March 2013 using Doppler weather radar and WRF model

Das

Chowdhury

et al. 2015

Geomatics, Natural Hazards and Risk

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A tornado occurred at Brahmanbaria in Bangladesh in the afternoon of 22 March 2013. The tornado event has been studied based on tropical rainfall measuring mission (TRMM) data, radar observations and model simulations. The maximum reflectivity and the vertical extent of the system have been recorded to be about 54.7 dBZ and 15 km, respectively, by the Doppler weather radar (DWR) at Agartala, India. The event has been simulated by using the WRF model at 3-and 1-km horizontal resolution nested domains based on six hourly final (FNL) re-analysis data and boundary conditions of National Centers for Environmental Prediction (NCEP). Results show that, while there are differences of 40 minutes before the observed time of the storm, the distance between observed and simulated locations of the storms is 0.5 . The maximum amount of vorticity transferred by directional shear in the storm updraft (helicity) due to convective motion simulated by the model is found to be 1774 m 2 s ¡2 , and the highest value of bulk Richardson number shear that defines the region in which low-level mesocyclogenesis is more likely has been 457.3 m 2 s ¡2 , which is generally supposed to produce rotating storms according to the prescribed range. The highest vertical velocity simulated by the model is about ¡28 to 58 m s ¡1 .

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Section: Surface Wind Slp Rh and Temperature Analysesmentioning

confidence: 99%

Simulation of tornado over Brahmanbaria on 22 March 2013 using Doppler weather radar and WRF model

Das

Chowdhury

et al. 2015

Geomatics, Natural Hazards and Risk

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“…A detailed technical description of ARW is available in [31]. WRF model has been very widely used over a range of applicability and operability and has been tested effectively in forecasting extreme rainfall event [32,33], intercomparison of winter and non-winter hail storms [34], sensitivity of physical schemes in simulating intense western disturbances [35] and meteorological data source for dispersion modeling [36].…”

Section: Model Descriptionmentioning

confidence: 99%

Sensitivity study of planetary boundary layer scheme in numerical simulation of western disturbances over Northern India

2019

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A numerical weather forecasting model (WRF-ARW) is used to simulate the weather during western disturbances over India. The horizontal resolution of the model is 27 km, and the model covers a region extending from 40°E to 105°E and 10°N to 48°N. The Asymmetric Convective Model, version 2 (ACM2) scheme is used to parameterize planetary boundary layer in the simulations. This scheme uses several parameters which are hidden or implicit from the model users. Literature shows that a particular parameter 'p' used in this scheme to prescribe the vertical profile of eddy exchange coefficient has significant impact on mixing within the planetary boundary layer. Thus, the default value of 'p' may not be the most appropriate choice for all types of atmospheric conditions. In the present study, attempt has been made to study the effect of 'p' on the parameters like potential temperature and relative humidity within planetary boundary layer and also to prescribe an appropriate value of 'p' for the region under study. Our study reveals that the WRF-ARW model embedded with PBL parameterization (ACM2) is capable of more appropriately simulating the potential temperature and relative humidity by using 'p' value of 1.25 to prescribe the vertical profile of eddy exchange coefficient within the boundary layer especially during the daytime when the system is dominated by convective-scale eddies at least for the chosen domain and period of study.

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Rare winter‐thunderstorms with hail overnight 12/13 December 2019 over Delhi and its vicinity: an observational study

Saha,

Prasad,

Rani

et al. 2024

Weather

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A rare overnight thunderstorm with hail on 12/13 December 2019 over Delhi was driven by a Westerly Disturbance (WD) and analysed with the aid of multi‐platform observations. The Doppler weather radar (DWR) detected high reflectivity values (>50dBZ), indicating hail within towering convective clouds. In‐situ measurements showed intense rainfall (totalling ~134mm), accompanied by strong wind gusts and a rapid pressure drop. Satellite data revealed widespread cold cloud tops (<−50°C) associated with the deep convection, while radiosonde profiles indicated atmospheric instability and veering winds during its passage. Lightning observations confirmed energetic convective updrafts. The event highlights the impact of WDs in triggering severe and rare winter convective storms over northern India.

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Inter-comparison of physical processes associated with winter and non-winter hailstorms using the weather research and forecasting (WRF) model

Cited by 11 publications

References 14 publications

Simulation of tornado over Brahmanbaria on 22 March 2013 using Doppler weather radar and WRF model

Simulation of tornado over Brahmanbaria on 22 March 2013 using Doppler weather radar and WRF model

Sensitivity study of planetary boundary layer scheme in numerical simulation of western disturbances over Northern India

Rare winter‐thunderstorms with hail overnight 12/13 December 2019 over Delhi and its vicinity: an observational study

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