adamhsparks
commented
3 years ago Thanks, I’ll check on this.
On 23 Jun 2021, at 03:26, dvictori @.***> wrote:
I'd like to evaluate hail frequency so I'm interested in the I_HAIL flag. But it's always returning NA. Bellow, an exemple:
check if Hail flag is working
library(data.table) library(GSODR)
first get station data using GSODR
stn <- '310540-99999'
data_gsodr <- get_GSOD(2001, stn)
do we have hail? NO! All NA values
unique(data_gsodr$I_HAIL)
> [1] NA
now get data from server
data_server <- fread('https://www.ncei.noaa.gov/data/global-summary-of-the-day/access/2001/31054099999.csv')
Hail is the third flag in FRSHTT. Thus anything that has xxx1xx is hail
There are 3 days with hail obs for this station / year
hail <- as.integer(data_server$FRSHTT / 100) %% 10 data_server[hail == 1,]
> STATION DATE LATITUDE LONGITUDE ELEVATION NAME TEMP
> 1: 31054099999 2001-04-11 59.18333 135.15 212 UST JUDOMA, RS 19.5
> 2: 31054099999 2001-06-03 59.18333 135.15 212 UST JUDOMA, RS 46.7
> 3: 31054099999 2001-07-29 59.18333 135.15 212 UST JUDOMA, RS 74.0
> TEMP_ATTRIBUTES DEWP DEWP_ATTRIBUTES SLP SLP_ATTRIBUTES STP
> 1: 7 9.9 7 1007.7 7 999.9
> 2: 7 44.1 6 998.3 7 999.9
> 3: 8 56.2 7 1010.3 6 999.9
> STP_ATTRIBUTES VISIB VISIB_ATTRIBUTES WDSP WDSP_ATTRIBUTES MXSPD GUST
> 1: 0 24.3 7 0.8 7 3.9 999.9
> 2: 0 16.0 7 0.6 7 3.9 999.9
> 3: 0 31.1 8 0.2 8 1.9 999.9
> MAX MAX_ATTRIBUTES MIN MIN_ATTRIBUTES PRCP PRCP_ATTRIBUTES SNDP
> 1: 36.5 2.7 * 0.01 E 999.9
> 2: 55.9 36.5 * 0.43 F 999.9
> 3: 92.3 57.0 99.99 999.9
> FRSHTT
> 1: 11100
> 2: 110100
> 3: 10100
Data for the same days has no hail information. No hail flag is present
data_gsodr[hail == 1,]
> STNID NAME CTRY COUNTRY_NAME ISO2C ISO3C STATE LATITUDE
> 1: 310540-99999 UST'-JUDOMA RS RUSSIA RU RUS 59.183
> 2: 310540-99999 UST'-JUDOMA RS RUSSIA RU RUS 59.183
> 3: 310540-99999 UST'-JUDOMA RS RUSSIA RU RUS 59.183
> LONGITUDE ELEVATION BEGIN END YEARMODA YEAR MONTH DAY YDAY TEMP
> 1: 135.15 212 19590101 20210116 2001-04-11 2001 4 11 101 -6.9
> 2: 135.15 212 19590101 20210116 2001-06-03 2001 6 3 154 8.2
> 3: 135.15 212 19590101 20210116 2001-07-29 2001 7 29 210 23.3
> TEMP_ATTRIBUTES DEWP DEWP_ATTRIBUTES SLP SLP_ATTRIBUTES STP
> 1: 7 -12.3 7 1007.7 7 NA
> 2: 7 6.7 6 998.3 7 NA
> 3: 8 13.4 7 1010.3 6 NA
> STP_ATTRIBUTES VISIB VISIB_ATTRIBUTES WDSP WDSP_ATTRIBUTES MXSPD GUST MAX
> 1: 0 39.1 7 0.4 7 2 NA 2.5
> 2: 0 25.7 7 0.3 7 2 NA 13.3
> 3: 0 50.1 8 0.1 8 1 NA 33.5
> MAX_ATTRIBUTES MIN MIN_ATTRIBUTES PRCP PRCP_ATTRIBUTES SNDP I_FOG
> 1:
-16.3 * 0.3 E NA NA > 2:
2.5 * 10.9 F NA NA > 3:
13.9 NA NA NA > I_RAIN_DRIZZLE I_SNOW_ICE I_HAIL I_THUNDER I_TORNADO_FUNNEL EA ES RH
> 1: NA NA NA NA NA 0.2 0.4 65.4
> 2: NA NA NA NA NA 1.0 1.1 90.3
> 3: NA NA NA NA NA 1.5 2.9 53.7
sessionInfo()
> R version 4.1.0 (2021-05-18)
> Platform: x86_64-pc-linux-gnu (64-bit)
> Running under: Ubuntu 20.04.2 LTS
>
> Matrix products: default
> BLAS: /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3
> LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/liblapack.so.3
>
> locale:
> [1] LC_CTYPE=pt_BR.UTF-8 LC_NUMERIC=C
> [3] LC_TIME=pt_BR.UTF-8 LC_COLLATE=en_US.UTF-8
> [5] LC_MONETARY=pt_BR.UTF-8 LC_MESSAGES=en_US.UTF-8
> [7] LC_PAPER=pt_BR.UTF-8 LC_NAME=C
> [9] LC_ADDRESS=C LC_TELEPHONE=C
> [11] LC_MEASUREMENT=pt_BR.UTF-8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats graphics grDevices utils datasets methods base
>
> other attached packages:
> [1] GSODR_3.1.0 data.table_1.14.0
>
> loaded via a namespace (and not attached):
> [1] digest_0.6.27 withr_2.4.2 R6_2.5.0 magrittr_2.0.1
> [5] reprex_2.0.0 evaluate_0.14 httr_1.4.2 highr_0.9
> [9] stringi_1.6.2 rlang_0.4.11 cli_2.5.0 curl_4.3.1
> [13] rstudioapi_0.13 fs_1.5.0 rmarkdown_2.8 tools_4.1.0
> [17] bit64_4.0.5 stringr_1.4.0 glue_1.4.2 bit_4.0.4
> [21] xfun_0.23 yaml_2.2.1 compiler_4.1.0 htmltools_0.5.1.1
> [25] knitr_1.33
Created on 2021-06-22 by the reprex package (v2.0.0)
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I'd like to evaluate hail frequency so I'm interested in the I_HAIL flag. But it's always returning NA. Bellow, an exemple:
Created on 2021-06-22 by the reprex package (v2.0.0)