1. REVIEW BY FLT LT KK DESHMUKH
UTILISATION OF AEROSTAT DOPPLER WEATHER RADAR IN NOWCASTING OF CONVECTIVE PHENOMENA P.K. ARORA AND T.P. SRIVASTAVA MAUSAM 61, 1 (JAN 2010)
REVIEW BY FLT LT KK DESHMUKH

2. SEQUENCE INTRODUCTION AIM
SYSTEM AND ASSOCIATED METEOROLOGICAL EQUIPMENTS
DWR: SPECIFICATION AND WORKING PRINCIPLE
METHODOLOGY AND DATA USED
CASE STUDY
INFERENCES
CONCLUSION
CRITICAL APPRECIATION

3. INTRODUCTION

4. AIM
UTILISATION OF THE DWR IMAGES FOR NOWCASTING OF THUNDERSTORM/DUST STORMS DURING PRE-MONSOON AND SW MONSOON SEASON

5. AEROSTAT SYSTEM AND ASSOCIATED METEOROLOGICAL EQUIPMENTS
AUTOMATIC WEATHER STATION (AWS)
WIND PROFILER
THUNDERSTORM SENSOR AND ELECTRIC FIELD MILL
DOPPLER WEATHER RADAR

6. OPERATING LIMITATIONS DUE TO WEATHER
WIND SPEED
GUSTING
TURBULENCE
LIGHTENING
THUNDERSTORM
DUST DEVILS
PRECIPITATION

7. SPECIFICATIONS AND WORKING PRINCIPLE

8. MODES OF OPERATIONS WEATHER (Wx) MODE
WEATHER PLUS TURBULENCE (Wx + T) MODE
TURBULENCE (T) MODE

10. PRODUCTS GENERATED THROUGH DWR
STANDARD METEOROLOGICAL PRODUCTS
EXTENDED METEOROLOGICAL PRODUCTS
HYDROLOGICAL PRODUCTS
WIND SHEAR DETECTION PRODUCTS
PHENOMENA DETECTION PRODUCT
AVIATION PRODUCT
RAW DATA PRE-PROCESSING

11. METHODOLOGY AND DATA USED
CONTINUES HALF HOURLY BARNALA RADAR IMAGES OF 2008 DURING PR-MONSOON AND SW MONSOON
COMPARISON WITH ACTUAL TIME OBSERVATION
NWP PRODUCTS GENERATED WITH 1200 UTC INITIAL CONDITIONS AT AFCNWP (MM5 MODEL VERSION 3.7.2)

12. CASE STUDY APR 08

13. ANALYSIS OF DWR IMAGERIES
TIME
(UTC)
LOCATION OF ECHO
1411
OVER PAKISTAN, ABOUT 20 NM SE OF SARGODHA
1511
ECHO MOVED SLIGHTLY EASTWARDS
1626
ANOTHER ECHO WAS SEEN ALONG THE INTERNATIONAL BORDER, ABOUT NM WEST OF BARNALA
2-3 SIGNIFICANT ECHOES WERE OBSERVED MOVING TOWARDS NORTHEAST, AFFECTING WEATHER OVER PATHANKOT, AMRITSAR AND ADAMPUR
1906
SIGNIFICANT ECHO WAS OBSERVED BETWEEN NM TO THE NORTHEAST OF BARNALA
FRESH ECHOES FORMED AND MOVED TOWARDS NORTHEAST, AFFECTING WEATHER OVER PATHANKOT, ADAMPUR, HALWARA AND BATHINDA

14. DWR IMAGES FROM BARNALA ON 15-16 APRIL 2008

15. OBSERVED WEATHER

16. ANALYSIS OF NWP PRODUCTS

17. VERTICAL PROFILE OF VERTICAL VELOCITY AND RELATIVE HUMIDITY

20. PREDICTED AND OBSERVED STRONGEST WIND

21. WIND SPEED IN LOWER LEVELS

23. PREDICTED AND OBSERVED STRONGEST WIND

24. SIMULATED COMPOSITE REFLECTIVITY

26. FORECAST RAINFALL PATTERN

28. INFERENCES RADAR IMAGES GAVE VERY RELIABLE INDICATION
MESO-SCALE NWP MODELS CAN BE UTILISED
VERTICAL PROFILES OF VERTICAL MOTION AND RELATIVE HUMIDITY INDICATE THE POSSIBLE TIME FRAME
PREDICTED AMOUNT OF RAINFALL MAY NOT ALWAYS BE RELIABLE

29. CONCLUSION DWR IS A VERY GOOD TOOL TO TRACK THE MOVEMENT
MESO-SCALE NWP MODELS ARE CAPABLE OF GENERATING RELIABLE INDICATIONS
INTEGRATION OF BOTH THE INPUTS CAN INCREASE THE ACCURACY AND RELIABILITY
RADAR ECHOES ARE SENSITIVE TO THE SEASONS

30. CRITICAL APPRECIATION
STUDY IS CARRIED OUT ONLY FOR PRE-MONSOON AND SW MONSOON, HOWEVER NW INDIA WEATHER IS ALSO AFFECTED DURING POST-MONSOON. THE CASES ARE NOT CONSIDERED
MORE CASE SHOULD HAVE BEEN TAKEN INTO CONSIDARATION
AS PER AUTHOR ONLY HALF HOURLY IMAGES ARE AVAILABLE, BUT THE IMAGES ARE AVAILABLE IN REAL TIME