WRF 72-Hour Forecasts for

VietNam and Southeast Asia  

 

 

 

QUICK LOOK - FORECASTS FOR NEXT 24 HOURS:

 

INTRODUCTION

The mesoscale model WRF (Weather Research and Forecast)  is the most accurate and updated model available today. It has been developed by U.S. National Center of Atmospheric Research (NCAR) with contributions from weather agencies and universities, both in the US and around the world.  The WRF model is being used in mesoscale meteorological modeling, including real-time forecasting, by government agencies and well-known universities, both in the U.S. (e.g., National Weather Service and NASA) and abroad (e.g., Europe, Hong Kong and Taiwan).  The WRF forecasts cover most of Southeast Asia, from south China in the north to north Borneo in the south, and India in the west to the Phillipines in the east.  Two nested modeling domains are used: the outer grid (Domain D01) is comprised of 110x85 grid cells with a grid resolution of 36 km; and an inner domain (D02) focusing on Cambodia, Laos and Vietnam has a finer resolution of 12 km with 88x148 grid cells All three modeling grids have 27 vertical levels.

Four WRF forecasts, valid for 72 hours, are available daily and free of charge, for 00 UTC (07 A.M. Vietnam time), 06 UTC (1 P.M. Vietnam), 12 UTC (7 P.M. Vietnam) and 18 UTC (1 A.M. next day Vietnam).  Initial and boundary conditions have been derived from the NCEP GFS global analyses. The forecasts are updated with the latest weather information and reports from satellites, radars, weather stations, airports and ships in the region. The GFS global forecasts employ a coarse grid resolution of over 50 km. With a finer grid resolution (12 km in the inner domain), the WRF forecasts are expected to be more accurate than other Internet forecasts, such as those that rely on these coarse global forecasts. Our WRF forecasts also provide predicted rainfall amount and winds ---  information that are important in emergency planning during tropical storms.  We hope that these WRF forecasts will be useful in emergency planning, such as storm alert and evacuation decisions, so that potential losses of both life and property can be minimized.

 NOTES IN READING FORECAST MAPS

1. All times on the maps are UTC. To convert to local time in Vietnam, add 7 hours (Local time Vietnam= UTC + 7). For Myanmar, Local time = UTC + 6:30

2. Wind speed and direction are represented by wind barbs.  The direction the wind is blowing from is represented by a staff or wind direction line. Wind speed (in knots) is denoted by the barbs at the end of the wind direction line (short lines 5 knots; long lines 10 knots; flag 50 knots). Calm winds are indicated by O's.

3. Surface wind speed in knots ( 1 kt = 1.9 km/hr). 

 

FORECAST MAPS OF 12 KM DOMAIN (D02)

Surface Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
Accumulated Total Precipitation 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
850-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
700-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
500-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
300-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation

FORECAST MAPS OF 36 KM DOMAIN (D01)

Surface Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
Accumulated Total Precipitation 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
850-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
700-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
500-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation
300-mb Temperature & Winds 00 03 06 09 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 Animation


Last modified: June 2021