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PoT Thunder - Model Blend Probs - Zeros on Day 4 (mid shift)

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JM
Joseph Moore, modified 7 Years ago.

PoT Thunder - Model Blend Probs - Zeros on Day 4 (mid shift)

Youngling Posts: 72 Join Date: 11/1/13 Recent Posts

I noticed this morning (July 1, 2018 mid shift) that my Day 4 PoTThunder grid had zero for all of Day 4 day period (12z-00z) when the available guidance (just MOSGuide at that time range) had much higher probabilities. I've attached a screenshot showing what the tool gave me (white numbers) versus what MOSGuide had (brownish color numbers/lines). I was able to catch this and fix it, but just wanted to report this as it seems like a bug. I would expect PoTThunder to equal the MOSGuide grid for this time range, and it does match up fine from Day 4 night period onward. (At this time range, when I ran the tool (around 6:30z) there is no SREF data available; the 21z SREF is the latest available.)

I do seem to get an error when running this tool - a "Java expected grid of type (float32, native endian, C ordered) but Python returned (int64, native endian, C ordered)" error.

Our ForecastBuilderUtility is version 4.44.

JM
Joseph Moore, modified 7 Years ago.

RE: PoT Thunder - Model Blend Probs - Zeros on Day 4 (mid shift)

Youngling Posts: 72 Join Date: 11/1/13 Recent Posts

I was able to replicate this bug again this morning (7/2) at ~07:00z when the 03z SREF was rolling in but had not completed. The tool properly put in the latest available SREF data and MOSGuide, but the day 4 day period filled in all zeroes with the same Java grid type error.

AJ
Andy Just, modified 6 Years ago.

RE: PoT Thunder - Model Blend Probs - Zeros on Day 4 (mid shift)

Youngling Posts: 89 Join Date: 6/2/15 Recent Posts

Joe - Yeah we're running into the issue as well. It appears Day 4 and that time period only where we get a missing gap of no SREF and no 3 hourly MOSGuide data. We are going to fix the code so it checks if there is no 3 hourly MOSGuide data, revert to 6 hourly MOSGuide.

Needless to say this will all become a moot point with the NBM.

JM
Joseph Moore, modified 6 Years ago.

RE: PoT Thunder - Model Blend Probs - Zeros on Day 4 (mid shift)

Youngling Posts: 72 Join Date: 11/1/13 Recent Posts
Good to know it wasn't just me!

What's the timeline on the switch to NBM? If this problem is something that can be fixed easily it would be nice to have while we're in the middle of the convection season up here.

-Joe

On Mon, Jul 2, 2018 at 1:36 PM, Andy Just <VLab.Notifications@noaa.gov> wrote:

Joe - Yeah we're running into the issue as well. It appears Day 4 and that time period only where we get a missing gap of no SREF and no 3 hourly MOSGuide data. We are going to fix the code so it checks if there is no 3 hourly MOSGuide data, revert to 6 hourly MOSGuide.

Needless to say this will all become a moot point with the NBM.

Virtual Lab Message Boards https://vlab.noaa.gov/web/cr-soo/forecast-builder-forum/-/message_boards/view_message/4359027 VLab.Notifications@noaa.gov http://vlab.noaa.gov



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Joseph J. Moore
Meteorologist | WFO Duluth Social Media & IDSS Program Leader | Open Source GIS Evangelist
NOAA/National Weather Service Duluth, MN