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The radar loop below shows the emergence of light reflectivities, which appear to be moving to the west. This image is a radar loop from Sunday morning showing the re-emergence of the mayflies. Notice they spread west southwest in the direction of the mean wind flow. It's fascinating to see just how high the reflectivities are with areas of greater than 40 dbz echoes (yellows) which are higher than what is typically observed with insects being detected on radar.
So why did they appear to emerge over the western suburbs? It is believed that a lake breeze carried these mayflies inland on Saturday evening. Looking at the radar loop below from Saturday evening we can see a pronounced lake breeze boundary oriented from northwest to southeast across the western suburbs. Near the end of the loop the boundary begins to dissipate. Notice that this area corresponds well with the area of increasing reflectivity during the early morning hours, shown on the left. Therefore it is likely that the mayflies were picked up by and carried west by the boundary Saturday evening. Then, radar showed blossoming reflectivity around sunrise Sunday morning right in the location of where the boundary dissipated Saturday evening, so this was mayflies taking off early Sunday morning from where the boundary had left them Saturday evening!
At Day 5, GFS sends Tropical Wave westward near islands beneath strong Bermuda high. Ugly weather for Spain.
Huge ridge in the Atlantic...
Man this setup is screaming East coast Tropical storms. Waves coming off Africa, choo choo training under the Bermuda High (which has shifted back to Atlantic) and then you get a trough in the East and it will ride up the right side of the trough.
"Temperatures at Norilsk, Russia have peaked at 32.0°C (89.6°F) today (Monday, July 22), the warmest ever observed at this large city in the Russian Arctic near 70° N latitude, almost as far north as Barrow, Alaska, and possibly the warmest temperature ever measured at such a northerly latitude on earth."
Another humid day (surprise surprise), but finally with some much needed rain. Grass is starting to get brown. Whatever happened to that cold front that was supposed to come through this weekend? The dewpoint did briefly drop into the 50s yesterday, but I guess I didn't notice since I was soaked in sweat from running around at work. Didn't last long either. Dewpoints jumped back up.
Maybe some sweet relief later this week. This is the best forecast I've seen in a while. Hope it verifies.
Tonight: Showers and thunderstorms likely. Some of the storms could produce heavy rain. Low 21.
Tuesday: Mostly cloudy with showers and thunderstorms likely. Some of the storms could produce heavy rain. High 28.
Wednesday: Mostly sunny. High 26. Low 19.
Thursday: Mostly sunny. High 26. Low 14.
Friday: Mostly sunny. High 27. Low 12.
Saturday: Mostly sunny. High 27. Low 18.
Sunday: Partly sunny with a 40% chance of showers and thunderstorms. High 27. Low 18.
Monday: Mostly sunny. High 27. Low 16.
Yeah, but not for here as we never, ever, ever get thunderstorms, and today is proving no exception as most of the action was to the west of here. Gr. Summer is sh*t.
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