Begin forwarded message: From: "John Idzikowski" <[email protected]> Date: April 9, 2005 10:26:20 AM CDT To: "Wisconsin Birding Network" <[email protected]> Subject: [wisb] Re: Nexrad tonight
It's nice to see that someone is using the Nexrad site, understanding what they are seeing AND losing sleep over migration.... Last night was essentially the beginning of the big movements out of Mexico altho these have been building over the last three weeks. Together with just more Neotropicals beginning to migrate as well as a perfect weather system flow, last night was great for a tailwind. There is a High over the Gulf and a High to our east making for a strong southerly flow on the backsides of both systems. Nights like this will be regular but not nightly from now on. We saw a major arrival of Hermit Thrushes last night. For those of you that have access to the Internet during the day you can view Gulf crossers landing on the northern Gulf Coast beginning in the late morning and into the afternoon following good nights. Use the Weather Underground or UCAR sites linked from the Nexrad site and stay with the Houston or Lake Charles image; check the Base Radial Velocity for direction of movement. Note how high they come in over the radar (there will be a big hole in the donut or partial donut that is formed). If a bird flies higher over the Gulf it has better winds perhaps and a longer distance to the water when it hits a headwind. On most days note that they continue to head inland- you'll see lots of detections north of the radar- often continuing beyond radar detection as they do not seek first land. We are still about 4.5 weeks away from the beginning of our peak nights here. Right now in mid-morning the coastal hoppers are still moving over Brownsville, TX. The vast majority of migrants probably take this safer route. Let's not forget the island hoppers coming into Florida and the Gulf via the Caribbean seen on the Key West radar. Included in this group later on will be Black-throated Blue and Connecticut Was. Here's a velocity image of Corpus Christi of a 20+ dbz movement- the reddest reds indicate targets moving fastest away from the radar the bluest blues towards the radar. http://my.execpc.com/CE/5F/idzikoj/nexrad/409corpuschristi.jpg John I, Milwaukee ----- Original Message ----- From: "Kevin Kearns" <[email protected]> To: "Wisconsin Birding Network" <[email protected]> Sent: Friday, April 08, 2005 10:59 PM Subject: [wisb] Re: Nexrad tonight > I lied, couldn't sleep. Reflectivity is now over 20DBZ for the entire > state, with hits of close to 30. The Mississippi valley is generally above > 30DBZ. The entire Midwest covering Missouri, Iowa, Illinois, > Minnesota, > Michigan, Indiana and Wisconsin are showing above 20DBZ for the entire > Range. The Texas Gulf Coast is way above 30DBZ from south of > Brownsville > past Houston. There is also a good sized wave that left Michigan at > 9:15 > and is approaching Door Peninsula - the entire peninsula from > Sheboygan to > Escanaba. > > If you don't remember what these numbers mean, check John Idzikowski's > tutorial. > http://my.execpc.com/CE/5F/idzikoj/nexrad/nexweb/nexrad.htm > > http://my.execpc.com/CE/5F/idzikoj/nexrad/nexweb/Slide12.JPG > > Good Birding tomorrow, > Kevin Kearns > Neenah > > -----Original Message----- > From: Wisconsin Birding Network [mailto:[email protected]]on Behalf > Of Kevin Kearns > Sent: Friday, April 08, 2005 9:33 PM > To: Wisconsin Birding Network > Subject: [wisb] Nexrad tonight > > > Unfortunately, I am exhausted, or I would stay up and watch the > migration on > radar tonight. It seems that the entire region is exploding right now. > Eastern Wisconsin is showing 15DBZ all the way through, while the > Mississippi Valley is experiencing in the 20-25 range at 9:30pm. > > Incredible > > http://www.crh.noaa.gov/radar/loop/DS.p19r0/si.kmkx.shtml > > Kevin Kearns > Neenah > > > ############################## > This message is sent to you because you are subscribed to > the mailing list <[email protected]>. > To UNSUBSCRIBE, E-mail to <[email protected]> > To switch to the DIGEST mode, E-mail to <[email protected]> > Send administrative QUERIES, E-mail to <[email protected]> > > > ############################## > This message is sent to you because you are subscribed to > the mailing list <[email protected]>. > To UNSUBSCRIBE, E-mail to <[email protected]> > To switch to the DIGEST mode, E-mail to <[email protected]> > Send administrative QUERIES, E-mail to <[email protected]> ############################## This message is sent to you because you are subscribed to the mailing list <[email protected]>. To UNSUBSCRIBE, E-mail to <[email protected]> To switch to the DIGEST mode, E-mail to <[email protected]> Send administrative QUERIES, E-mail to <[email protected]>
