There are several chasers here on the forum that can attest that the FWD NWS has called them direct while chasing.
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Greg, I assume YOU are the "Greg" I've dealt with out of the Fort Worth NWS office via ham while chasing/spotting. If so, you are absolutely wonderful to work with. Greg is correct. More times than I can count I have been called on my cell phone, and called on the ham radio by the FWD NWS office. I've been on one storm that had 3-4 other spotters on it, and been asked if I would be willing to switch to a different storm that they are worried about. They will see my dot on SN moving north on I35, and call me to ask which storm I'm heading to. The reason I love using Amature radio is because I can hear when another spotter/chaser is working a storm with the FWD office and I am then able to figure out how I can help. I may have a better angle on a "feature" and can confirm that the funnel is not on the ground yet, etc. My wife and I are also equipped and experienced to be able and willing to chase after dark when most people pack it up.
To the subject at hand......I only see "resistance" from the major cities spotter nets. I don't bother working a storm if it is in the DFW metro or suburbs. They have enough resources and have it covered IMO. Rural areas are what we work, and have been welcomed with open arms every single time, from Arkansas to Kansas to Texas to Oklahoma. We always check in early before things get heated, let the net know we are SKYWARN out of Dallas and are operating in their area today, etc. We have never gotten a cold shoulder.
As for spotters vs chasers......
I think a lot of chasers are seen as spaz thrill seekers. Plus, the local Skywarn net has no idea who the chaser is and whether they are credible. Then, add in the fact that most Skywarn nets are run by older men who are set in their ways......
The problem is.....most local nets are county based. They activate when the weather enters their county, and deactivate when it leaves their county. Since 1987, I was a traditional "spotter". I would wait all year only to activate twice and never see anything. Most "spotters" have never seen a tornado. When I listen to a local net, I hear so much bad information it is scary. Obvious scud being called in as a funnel. Overestimation of wind speed. I hear too many excited, scared, poorly trained people. The net controllers filter most of the junk out, but still....Also, the traditional "spotter" does not have GR3 in their vehicle nor other equipment. Chasers see more severe weather and gain more experience in one season than most "spotters" do in an entire lifetime. After just 3 seasons of all out chasing, I am a MUCH better asset to the NWS than I was after 20 years as a "spotter"! But, like the earler poster, I don't use the dirty word of chaser. Carmen and I say we are HIGHLY moble spotters.