The folks who invented Doppler never expected this.
A massive Mayfly hatch over the Mississippi last night near La Crosse shows up brilliantly on the Doppler radar reflectivity loop last night. The hatch occurred between about 9pm and 10pm from near Winona south through La Crosse and to near Guttenberg, Iowa.
Mayfly "cloud" visible on NWS La Crosse doppler radar Monday night.
As the dense "cloud" of Mayflies hatches and drifts over the river valley, it shows up on Doppler as the radar beam hits the cloud and returns to the radar site. Doppler radar is so sensitive that birds, insects and even dust are visible in clear air mode.
Tropical Storm Bonnie?
The National Hurricane Center has upgraded the chance that a tropical wave near Puerto Rico will strengthen into a tropical storm within the next 48 hours from 20% to 40%. If it does, it would become tropical storm Bonnie.
Many forecast models then track the system toward the southeastern United States.
2010: Hottest year on record so far
It's either the mother of all coincidences or climate change is kicking into high gear.
We're half way through 2010 and NOAA reports that globally this is the hottest year on record so far. Check out these startling facts.
-June 2010 was the hottest on record globally (+1.22 degrees F)
-The past 4 MONTHS (Mar-Jun) have all been the hottest on record globally!
-2010 is on pace to be the hottest year on record globally (+1.22 degrees F)
-June was the 304th consecutive month above average globally!
-The last below average month was 25 years ago, February 1985. That's a lifetime for nearly 1/3 of the world's population.
2010 is on pace to surpass 1998 as the hottest year on record globally.
The data takes the wind out of the sails of those who would claim that the earth has been "cooling" since 1998. The 10 hottest years globally have all occurred since 1998, and there has not been one cooler than average year globally in 25 years.
You do the math.
Posted at 5:08 PM on July 20, 2010
by Paul Huttner
Filed under: Hurricanes
We may be saying hello to Tropical Storm Bonnie in the next 48 hours.
The National Hurricane Center is giving a vigorous tropical wave near Puerto Rico a 60% chance of strengthening into a tropical storm in the next 48 hours.
If the system develops, it would become the second named storms of the season, Bonnie.
Bonnie is fighting a few variables in terms of development, according to Dr. Jeff Masters, hurricane guru at Weather Underground. Dry air out ahead of Bonnie may retard development.
Also in favor of development are the warm ocean temperatures of 29°C. The SHIPS model predicts shear will stay in the moderate range, 10 - 20 knots, over the next five days. The primary detriment to development of 97L over the next three days will probably be the presence of dry, stable air in its path over the Bahamas, thanks to the upper-level low to the north of the Dominican Republic. If the center forms close to the coast of the Dominican Republic, the high mountains of Hispaniola may also be a problem for the storm. NHC is giving 97L a 60% chance of developing into a tropical depression by Thursday, which is a reasonable forecast. I think there is a 70% chance 97L will eventually become Tropical Storm Bonnie, sometime in the next five days. Sudden rapid development today or on Wednesday is unlikely, due to the dry air over the Bahamas. I put the odds of 97L making it to hurricane strength before reaching Florida at 30%, and I give a 20% chance it will be a hurricane in the Gulf of Mexico. The probability of 97L being a hurricane in the Gulf of Mexico will depend heavily upon how long the storm spends over land or interacting with land over the next four days, which is very uncertain.
Various forecast models are pushing what could become Bonnie toward south Florida by Thursday or Friday. The system may possible track into the eastern Gulf of Mexico after that.
All eyes in the southeast U.S. will be watching for the potential for Bonnie in the coming days.