Battling a longer allergy season

The National Phenology Network is showing the early arrival of leaves on trees in the Ohio Valley, the Midwest, and Western United States this year. This trend has become more of a norm over the past past 50 years.

Climate Central published data this week showing the same trend since 1970 with notable attention to the West where states are seeing as many as 17 more frost-free days, extending the growing season. Here in the Local 6 area, the growth is not as notable but still averaging between 4-9 days additional to the growing season. Why does this matter? Aside from having an influence on which plants are suitable for planting zones, it has a much higher societal impact by extending the allergy season.

"As the climate warms from the increase of greenhouse gases into the atmosphere, the last spring freeze is trending earlier and the first fall freeze is coming later. This means the growing season is getting longer, and so is the pollen season— whether it is from tree pollens in the spring, grass pollens in the summer, or ragweed in the fall. A study sampling 10 locations from Texas to Saskatoon, Canada indicated that pollen seasons lengthened between two to four weeks from 1995 to 2009, with the largest increases in the northernmost areas.
In addition, increasing atmospheric carbon dioxide enhances photosynthesis in plants, meaning that they produce more pollen. Lab studies have confirmed this, with timothy grass producing twice as much pollen for a doubling of carbon dioxide, and ragweed producing twice as much pollen even before a doubling of carbon dioxide is reached. And the lab studies are supported from the field. One study in Baltimore, where carbon dioxide concentrations were 30 percent higher than outside the city, found that ragweed grew faster and produced more pollen in the city.
Pollen allergies are not just a nuisance. Asthma symptoms can be triggered by exposure to pollen, with the number of emergency room visits increasing on days with high pollen. An analysis of emergency room visits in New York City during 1999 showed peaks in the number of visits correlated with high spring pollen counts, and is consistent with other work connecting allergy-induced asthma to increasing in hospital visits." -Climate Central

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Mid-South Winter Outlook 2023-2024

Getting a general idea of what the upcoming Winter months (December, January and February) will look like for our region can be heavily influenced by El Nino and La Nina episodes. Global and oceanic forecasters have observed El Nino conditions in the central and eastern Pacific Ocean and an EL NINO ADVISORY has been issued. The episode is expected to continue through Spring (March, April and May) in the Northern Hemisphere. Model projections are pointing to a strong, possibly very strong episode occurrence. (Current Sea Surface Temps warming off S. America) Meteorologists look at monthly data from Dec - Jan - Feb to determine a winter season average, or define that period of time as Meteorological Winter. An average winter in the Local 6 area shows an average temperature of 37 degrees, average precipitation total of 12.18" and average snowfall of 8.4". The National Weather Service in Paducah has historical data that covers 7 of the past strongest El Nino episodes in the past

Planting Zones Heading North

As our global climate changes, so does our planting zones, helping us determine which flowers/shrubs/trees are hardy in specific areas. The Local 6 area has always been split by 2-3 growing zones so placement becomes very important to those in the agricultural community. The image below represents the average over the past 30 years. Climate Central published the following information: "What kinds of flowers, shrubs and trees you’ll find at your local nursery depends on your climate — how warm it tends to get in summer, and how cold in winter. A plant that’s happy in Wisconsin might be miserable in Alabama, and vice versa. The U.S. Department of Agriculture has formalized these differences into " hardiness zones " — strips of similar climate that run more or less east-to-west (except in the high mountains), where particular plants should do especially well. But as the planet warms under its thickening blanket of greenhouse gases, those zones are shifting northward. Th

Update: Impacts From Tropical Depression Bill

Friday AM Update Heavy rain still appears to be our greatest concern as the remnants of Tropical Storm Bill pass directly over the Local 6 area throughout the day today. A Flash Flood WATCH continues for Southern Illinois, SE Missouri, and the Ohio River counties in Western Kentucky through Saturday. Here is a look at today's forecast concerning rainfall totals from the Weather/Hydrological Prediction Center. In any given area, 2-4 inches of rain will be possible. Low-lying areas are most prone to flash flooding. Showers and storms will increase in coverage and intensity during the day on Friday. Keep preparedness and awareness in mind as heavy rain moves in. Locate areas of higher ground in the event you need to retreat there. Never drive across flooded roadways. Keep children from playing in flood waters. Water depth and swiftness is difficult to determine. Below is the latest Flash Flooding Potential Briefing from the Paducah National Weather Service.

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