Add ingest for the Quantitative Precipitation Forecast

[wmjolly]

https://www.wpc.ncep.noaa.gov/qpf

GRIB2 files are here

[alexander-petkov]

WPC Quantitative Precipitation Forecast on noaa.gov: https://www.wpc.ncep.noaa.gov/qpf/qpf2.shtml

Grib2 ftp location: https://ftp.wpc.ncep.noaa.gov/2p5km_qpf/

[alexander-petkov]

Spatial info and pixel resolution appears identical to NDFD, slightly larger grid

[alexander-petkov]

Consider this table when scheduling a cron update:

[alexander-petkov]

Naming convention: https://www.wpc.ncep.noaa.gov/grib/hpcgrib022301.html

[alexander-petkov]

For now I will get the 6-hour data for the 00Z forecast--this will result in 7-day forecast with time resolution for every 6 hours.

[alexander-petkov]

Get date in YYYYMMDD format:

date +'%Y%m%d'

Get a list of today's files for the 00 forecast:

today=`date +'%Y%m%d' `
curl -s --list-only  https://ftp.wpc.ncep.noaa.gov/2p5km_qpf/|grep -E "p06m_${today}00f[
0-9]{3}.grb"|cut -d '"' -f 2

Or just use a for loop without querying remote server for a list:

for h in `seq -w 006 6 168`

[alexander-petkov]

It would be nice to snag a ready colormap

[alexander-petkov]

So far I have added the 6-hour accumulation files, for 7 days.

Are any others needed?

[wmjolly]

Are there 24 hour summaries too?

On Fri, Oct 2, 2020, 14:37 alexander-petkov notifications@github.com wrote:

So far I have added the 6-hour accumulation files, for 7 days.

Are any others needed?

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[alexander-petkov]

Are there 24 hour summaries too?

Yes

[alexander-petkov]

Is the 24 hour forecast the one that is needed?

Should I drop the 6-hour files, or keep it?

[wmjolly]

Keep all the 6 hour files too. They'll be useful in the future. However, the 24 hour summaries are most useful right now.

On Mon, Oct 5, 2020 at 9:48 AM alexander-petkov notifications@github.com wrote:

Is the 24 hour forecast the one that is needed?

Should I drop the 6-hour files, or keep it?

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[alexander-petkov]

I copied the colormap from the WPC images by using a colorpicker tool.

Tedious, but it works.... The values in the sld file need to be in ascending order, if modes like ramp or interval are used:

<ColorMap type="ramp">
              <ColorMapEntry color="#ffffff" quantity="0.00" label="0.00" opacity="0" />
              <ColorMapEntry color="#7fff00" quantity="0.01" label="0.01" />
              <ColorMapEntry color="#00cd00" quantity="0.10" label="0.10" />
              <ColorMapEntry color="#008b00" quantity="0.25" label="0.25" />
              <ColorMapEntry color="#104e8b" quantity="0.50" label="0.50" />
              <ColorMapEntry color="#1e90ff" quantity="0.75" label="0.75" />
              <ColorMapEntry color="#00b2ee" quantity="1.00" label="1.00" />
              <ColorMapEntry color="#00eeee" quantity="1.25" label="1.25" />
              <ColorMapEntry color="#8968cd" quantity="1.50" label="1.50" />
              <ColorMapEntry color="#912cee" quantity="1.75" label="1.75" />
              <ColorMapEntry color="#8b008b" quantity="2" label="2.00" />
              <ColorMapEntry color="#8b0000" quantity="2.50" label="2.50" />
              <ColorMapEntry color="#cd0000" quantity="3" label="3.00" />
              <ColorMapEntry color="#ee4000" quantity="4" label="4.00" />
              <ColorMapEntry color="#ff7f00" quantity="5" label="5.00" />
              <ColorMapEntry color="#cd8500" quantity="7" label="7.00" />
              <ColorMapEntry color="#ffd700" quantity="10" label="10.00" />
              <ColorMapEntry color="#ffff00" quantity="15" label="15.00"/>
              <ColorMapEntry color="#ffaeb9" quantity="20" label="20.00" />

However, my maps look quite different than WPC.

Mine:

WPC:

I think their maps aren't using all these colors. despite what the legend says.

[alexander-petkov]

Style colors scraped from QPF KML files:

Value	Color
0.1	#7fff00
0.25	#00cd00
0.5	#008b00
0.75	#104e8b
1.0	#1e90ff
1.25	#00b2ee
1.5	#00eeee
1.75	#8968cd
2.0	#912cee
2.5	#8b008b
3.0	#8b0000
4.0	#cd0000
5.0	#ee4000

[alexander-petkov]

Fixed url encoding error for coverage names with spaces.

[wmjolly]

[image: image.png] So cool!

On Wed, Oct 7, 2020 at 4:08 PM alexander-petkov notifications@github.com wrote:

Fixed url encoding error for coverage names with spaces.

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