0021	<P> : original PENTAD, 2.5 deg, 5 days
----
0091	<WD>: distance from weighting pointer to real grid
----
1000	<B> : 5 day sum of <A>, 2.5 deg
----
1001	<A> : ipolate GDAS TO 2.5 deg, 6 hr
  :     
  :
1020	(1024 for leap year pentad 12)
----
3001	<Q> : = <P> * <A> / <B>
  :	temporally disaggregated <P> to 2.5 deg, 6 hr
  :
3020    (3024 for leap year pentad 12)
----
4001	<G> : spatially disaggregated <Q> TO 0.7 deg, 6 hr
  :
  :
4020    (4024 for leap year pentad 12)
----
5001	<QQ> : remap <Q> TO 0.7 deg, 6 hr
  :
  :
5020    (5024 for leap year pentad 12)
----
6001	<AA> : remap <A> TO 0.7 deg, 6 hr
  :
  :
6020    (6024 for leap year pentad 12)
----
9001    <G> : spatially disaggregated <Q> TO 0.7 deg, 6 hr
  :           in grib format
  :
9020    (9024 for leap year pentad 12)
----
SNOW DOES NOT LIKE UNIT 9000, USE 900 INSTEAD