Mostly sunny. Warmer. Highs 62 to 70 above 6000 feet to 69 to 74 below 6000 feet. Areas of winds northwest 15 to 25 mph. Gusts to 40 mph...Becoming 35 mph in the afternoon.
Many gardeners have been puzzled by the sudden wilting and death of tomato plants. Possible causes of wilting include lack of water, vascular wilts, tomato spotted wilt virus, walnut toxicity, or stalk borers. Tomato plants require approximately 1 inch of water per week.
The appearance of yellow leaves on your tomato plant is usually not a death sentence. However, it does mean that your plant has a problem in need of attention and correction. Tomatoes need nitrogen; their leaves will turn yellow without it. Mix some compost or used coffee grounds in with the soil to determine if a lack of nitrogen is the problem. If the bottom leaves of your tomato plant turn yellow, it's probably lacking in important nutrients. It may not be getting adequate sunlight.