Categories - NWP

71 posts in total

NWP | Tropical Cyclone Track Data | TIGGE

NWP | TC Best Track | IBTrACS TIGGE Project TIGGE, the THORPEX Interactive Grand Global Ensemble, is a key component of THORPEX: a World Weather Research Programme to accelerate the improvements in t

2025-09-22

NWP

#NWP #WRF #MPAS #GFS #FNL #ERA5 #IFS #CMA #TIGGE #TC #typhoon #tracker

GEFS | MPAS | WRF

Global Ensemble Forecast System (GEFS) The Global Ensemble Forecast System (GEFS) is a weather model created by the National Centers for Environmental Prediction (NCEP) that generates 30 + 1 separate

2025-09-17

NWP

#WRF #WPS #MPAS #IC/BC #GFS #FNL #RDA #NCEP #GEFS

NWP | plot GFS grib files

NWP | wgrib2 | grib_ls Download subset of GFS NCEP GFS Forecasts (0.25 degree grid) https://nomads.ncep.noaa.gov/gribfilter.php?ds=gfs_0p25 Herbie https://herbie.readthedocs.io/en/latest/galle

2025-09-11

NWP

#NWP #WRF #MPAS #GFS #FNL #ERA5 #IFS #CMA

NWP | shapefile

shapefile A shapefile is a widely used geospatial vector data format for storing geographic features' location, shape, and associated attributes, developed by Esri for geographic information system (G

2025-09-10

NWP

#NWP #WRF #MPAS #GFS #FNL #ERA5 #IFS #CMA

Obs | weather records from the rp5.ru

https://pypi.org/project/weather-rp5/1.4/ https://github.com/KonstantenKomkov/weather

2025-08-04

NWP

#NWP #WRF #MPAS #HKO #obs #rp5.ru

Obs | China weather observations | 中国天气网

數據下載 (方法) 僅供學術研究及教學用途中国天气网 https://www.weather.com.cn/wzfw/about.shtml 中国天气网（www.weather.com.cn）是公益性气象服务门户网站，是中国气象局公众气象服务权威品牌“中国天气”的重要载体和组成部分，由中国气象局公共气象服务中心主办、华风气象传媒集团负责运营，于2008年7月正式上线运行。 city lis

2025-08-01

NWP

#NWP #WRF #MPAS #HKO #obs #GBA #China

Obs | Lightning data (閃電位置資訊)

HKO hourly_count https://www.hko.gov.hk/tc/wxinfo/llis/gm/llis_area_counts.htm https://www.hko.gov.hk/wxinfo/llis/gm/hourly_count 1234#!/bin/bashtmp_dir=$(date +'%Y-%m')mkdir -p ${

2025-07-31

NWP

#NWP #MPAS #HKO #obs #WRF-ELEC #Lightning #GBA

NWP | Specific Humidity

Relative Humidity and the Dewpoint Temperature NWP | Why is RH preferred over mixing ratio for initial moisture in NWP models Tephigram | 溫熵圖 To convert relative humidity (RH) to specific humidity

2025-07-23

NWP

#NWP #WRF #MAPS

NWP | PGW + Bias-corrected-CMIP6

2025-07-10

NWP

#NWP #WRF #MPAS #GFS #ERA5 #PGW #GRIB #NetCDF #CMIP6 #scale_factor #add_offset

DA | VarBC

Most data assimilation schemes assumes an unbiased observation model error. Berry, Tyrus, and John Harlim. "Correcting biased observation model error in data assimilation." Mo

2025-06-04

NWP

#NWP #WRF #MPAS #DA #WRFDA #KF #EKF #EnKF #VarBC #3dVar #4dVar

NWP | MPAS | WRF| Land Use/Land Cover and Soil Type

The Interplay Between Land Use/Land Cover and Soil Type in the WRF Model: Implications for Surface Variable Prognostication The Weather Research and Forecasting (WRF) model is a widely used numerical

2025-05-28

NWP

#NWP #WRF #MPAS #Meteorology #LANDUSE #SOILPARM

NWP | MPAS | WRF| Albedo calculation

Albedo Description of albedo calculation | Aug 30, 2018 If you map data to the 24-category USGS data, then albedo will be given at the model start time, based on the LANDUSE.TBL. Since

2025-05-09

NWP

#NWP #WRF #MPAS #Meteorology #Albedo #static.nc #geogrid.exe #LANDUSE

NWP | MPAS | Radar Reflectivity

Radar Reflectivity(雷達回波) 在描述雷達回波圖時，總是避免不了用到一個單位 —— dBZ 。「dBZ」是表示雷達回波強度的物理量，可用來估算降雨和降雪強度及預測諸如冰雹、強風等災害性天氣出現的可能性。一般來說，它的數值越大，降雨、降雪的可能性越大，強度也越強。當回波強度大於或等於40dBZ時，出現雷雨天氣的可能性較大；當它的值在45dBZ或以上時，出現暴雨、冰雹、強風

2025-05-07

NWP

#NWP #WRF #MPAS #HKO #Meteorology

NWP | Herbie | Download NWP model output (grib2) | MPAS | WRF

Herbie Herbie is a python package that downloads recent and archived numerical weather prediction (NWP) model output from different cloud archive sources. NWP data is distributed in GRIB2 format which

2025-04-10

NWP

#NWP #WRF #WPS #MPAS #GFS #IFS #GEFS #AIFS #grib #grib2 #ungrib

NWP | Eddy Dissipation Rate (EDR)

Eddy Dissipation Rate (EDR) Eddy Dissipation Rate (EDR) is a measure of atmospheric turbulence intensity, quantifying how quickly turbulent kinetic energy (TKE) is dissipated in the atmosphere. It is

2025-04-08

NWP

#NWP #WRF #MPAS #HKO #TKE #EDR #aviation

NWP | CMA | CMA_GFS real time data

中國氣象局（China Meteorological Administration，縮寫：CMA），是中華人民共和國國務院負責氣象行政管理與科學研究的副部級直屬事業單位。 CMA-GFS (原名为GRAPES-GFS) 作为我国自主研发的新一代全球数值预报模式，从初始场、变分同化、模式框架等核心技术均实现了自主化。CMA-GFS全球模式从2001年开始组织数值预报团队启动研发，2016年实现业务化

2025-04-02

NWP

#NWP #WRF #MPAS #CMA #CMA_GFS #Land-sea mask

NWP | DA | Kalman Filter

Optimal Interpolation (OI), 3D-Variational Assimilation (3DVar), and the Kalman Filter (KF) share foundational mathematical objectives but differ in implementation and error covariance treatment. Belo

2025-04-02

NWP

#NWP #WRF #MPAS #DA #KF #EKF #EnKF

NWP | DA | Optimal weight matrix W

Data assimilation (DA) NWP | DA | Kalman Filter NWP | DA | 4D-Var To derive the optimal weight matrix $ $in DA, we follow a minimum variance approach to combine background (model) and observation d

2025-04-02

NWP

#NWP #WRF #MPAS #DA #KF #EKF #EnKF

NWP | 4D-Var | Tangent Linear and Adjoint Models

Data assimilation (DA) What Are Tangent Linear and Adjoint Models? A mathematical explanation of the tangent linear and adjoint models in the context of variational data assimilation such as WRFDA:

2025-03-20

NWP

#NWP #WRF #MPAS #DA #WRFDA #4Dvar

NWP | Spectral Method

Spectral methods Spectral methods in numerical weather prediction (NWP) are advanced computational techniques that use global basis functions to solve the atmospheric governing equations with high acc

2025-03-20

NWP

#NWP #ECMWF #spherical harmonics #Truncation for wave numbers