lrdheat wrote:
Hi Wally,
Just realized why I was getting oddities on MSLP contours around Michigan. The data base lists KGNA as Grand Marais as a Michigan station. It should be Minnesota, and 47.75N -90.35(W), 185M.
Heatwave
Wow. This was a poser. And, it would be a long time error as it was in the original file this way.
The original file and current has KGRM for Grand Marais MN.
Airnav.com has this:
KCKC Grand Marais, MN, USA Grand Marais/Cook County Airport
Y98 Grand Marais, MI, USA Grand Marais Airport
0G5 Grand Marais, MN, USA Grand Marais/Cook County Seaplane Base
and no entry for KGNA. First time I've seen a miss for them.
Yet,
http://weather.rap.ucar.edu/surface/stations.txt gives Grand Marais as...
MN GRAND MARAIS KGNA 47 45N 090 21W 185 X A 7 US
MN GRAND MARAIS KGRM GRM 47 50N 090 23W 505 X 7 US
MN GRAND MARAIS/COO KCKC 47 50N 090 22W 548 X 7 US
It has no listing for the name in MI. All three lines are suspect because of elevations listed, unless there is quite a rise going inland. Being near the coast points to KGNA.
Two of them vote for KCKC in MN.
I just don't know the area. Took more digging, Apparently the MI city airport is KY98 based on
http://www.burttownship.com/Recreational/airport.htmThere is a Grand Marais coast guard station in MN, but it is also in the file as MI. That one looks wrong, too, and cannot be found in either main site database.
I'll enter the GNA listing, but not take out KCKC as it looks legit and only 5 mi. away. Will, make changes and repost file shortly.
Let me know how this affects contouring. Somebody is wrong, and I'm betting on your analyses.
UPDATE: New corrected file is uploaded.