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20000404: GRDDISP valid date/time display

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  • Subject: 20000404: GRDDISP valid date/time display
  • Date: Tue, 04 Apr 2000 11:27:55 -0600
>From: Bill Fingerhut <address@hidden>
>Organization: Lyndon State College
>Keywords: 200004041402.IAA28811 McIDAS-X 7.60 GRDDISP 

Bill,

>The command,
>GRDDISP MYDATA/GRIDS.1 1 FHOUR=6 NAV=F COLOR=6 CINT=QNQ TDAY=CAL
>
>just generated the label,
>... RUN TIME 0Z 04 APRIL 2000   6  HR FCST VALID 03 APR/06Z
>
>The run time is correct, but the valid time is one day short.

It would be useful to know the contents of MYDATA/GRIDS.1.  I just
tried plotting 6-hour forecast ETA grids from today and did not
experience the label problem you are reporting.

>Same thing happens for other forecast times from the same run.
>Could GRDDISP calculate the fcst time wrong?

I guess that it could, but I wonder why the problem isn't consistent.
What happens when you try to plot a forecast grid from today's ETA
GRID file:

MAP NA
GRDDISP RTGRIDS/ETA.5 NAV=F TDAY=CAL PAR=Z LEV=700

Tom

>From address@hidden  Tue Apr  4 12:47:54 2000

re: MAP NA
   GRDDISP RTGRIDS/ETA.5 NAV=F TDAY=CAL PAR=Z LEV=700

>I ran these two commands, and the label is wrong:
>        VALID  03 APR/00Z

Yikes!  What does the following listing return:

GRDLIST RTGRIDS/ETA.5 PAR=Z LEV=700 FHOUR=6 FORM=ALL

Here is what comes back on my machine:

Dataset position 5      Directory Title= ALL  00Z ETA 0  HR<=VT<=24 HR
PAR    LEVEL       DAY        TIME    SRC FHOUR     FDAY       FTIME  GRID  PRO
---- --------- ------------ -------- ---- ----- ------------ -------- ----- ----
Z     700 MB   04 APR 00095 00:00:00  ETA     6 04 APR 00095 06:00:00   230 LAMB
Total pts=  6045 Num rows=  65  Num columns=  93    received:  2000095 020415Z
Geopotential height
GRIB ID numbers: Geographic =211; PAR =  7; Model ID = 84; Level type =100
Units of gridded variable are GPM  Scale of variable is:   2
Lambert Conformal Tangent Cone Projection
Row num of pole= -113.34  Col num of pole=   53.00  Col spacing (m)= 81270.0
Standard Latitudes=   25.00     25.00   Standard Longitude=   95.00
Number of grids listed = 1
GRDLIST - done

Tom