Once thunderstorms develop, the National Weather Service's WSR-88D Doppler radar is used to evaluate severe weather and tornadic radar signatures in order to make short-term predictions of tornado occurrence. If a tornado is suspected, a tornado warning is issued for the affected area. However, while Doppler radar can interrogate severe storms very well, it cannot always detect the small-scale processes that actually lead to tornadogenesis.

Some conditions can be detected through careful physical exam, EKG, and a thorough medical history. When cardiovascular health concerns are identified or suspected through initial testing, further studies can confirm the presence of serious conditions, so that treatment or other intervention can take place.

Pupil dilation: This examination enables your eye care professional to see more of the retina and look for signs of AMD. To do this, drops are placed into the eye to dilate (widen) the pupil. After the examination, your vision may remain blurred for several hours. One of the most common early signs of AMD is the presence of drusen. Drusen are tiny yellow deposits in the retina. Your eye care professional can see them during an eye examination.

If you have diabetes, you should have your eyes examined at least once a year. Your eyes should be dilated during the exam. That means eyedrops are used to enlarge your pupils. This allows the eye doctor to see more of the inside of your eyes to check for signs of the disease.

Tornadoes can last from a few seconds to more than an hour. They might remain on the ground for just a few yards or for more than 100 miles. On average, tornadoes move from the southwest to the northeast at about 30 mph. However, as the killer Jarrell, Texas, tornado of May 27, 1997, showed, tornadoes can defy these averages. The "F-5" tornado that killed 27 people when it churned through a Jarrell subdivision moved southwest at only 10 mph.

In an average year, about 1,000 tornadoes are reported across the United States, resulting in 80 deaths and over 1,500 injuries. A tornado is a violently rotating column of air extending from a cumuliform cloud and in contact with the ground. A tornado usually (but not always) is visible due to condensation and dust and debris within the rotating column.

Tornadoes are possible anywhere in the United States, but are most common in the central plains east of the Rocky Mountains and west of the Appalachians. They usually occur in the late afternoon and evening during the spring and summer, being most common in the south in early spring and in the northern tier of states in the summer. However, tornadoes can occur on any day of the year and at any hour.

present, the fasting plasma glucose (FPG) and the 2-h oral glucose tolerance test (OGTT) are the tests of choice to identify all states of hyperglycemia. Either test is suitable, and each has advantages and disadvantages, such as convenience, cost, and reproducibility. Identification of individuals with IGT can be made only with a 2-hour OGTT; the fasting plasma glucose (FPG) alone will miss approximately 30% of patients with isolated IGT.

Since the 1980s, cloud-to-ground lightning flashes have been detected and mapped in real time across the entire US by several networks. In 1994, the networks were combined into one national network consisting of antennas that detect the angle from ground strike points to an antenna (direction-finder antenna), that detect the time it took for them to arrive at an antenna (time-of-arrival method), or a combination of both detection methods.

Dilated eye exam. Drops are placed in your eyes to widen, or dilate, the pupils. Your eye care professional uses a special magnifying lens to examine your retina and optic nerve for signs of damage and other eye problems. After the exam, your close-up vision may remain blurred for several hours. Tonometry. An instrument measures the pressure inside the eye. Numbing drops may be applied to your eye for this test.

Declining vision noticed by the patient or by a doctor during a routine eye exam may be the first indicator of macular degeneration. The formation of new blood vessels and exudates, or "drusen," from blood vessels in and under the macular is often the first physical sign that macular degeneration may develop. In addition, the following signs may be indicative of macular problems. Anyone experiencing these symptoms should consult an ophthalmologist immediately: a.

Your vet will do a blood test; there are two types of blood tests which can be performed. Some vets will automatically do one of the tests before vaccinating your cat to make sure it is not already positive for the virus. The first (ELISA test) is where the vet takes some of your cat's blood, mixes it with a chemical and watches for a color change. If the blood changes color then your cat has tested positive for the virus.

Prostate cancer screening should begin at age 50. In men at increased risk, including those with first degree relatives with prostate cancer and men of African American descent, screening should start at age 40.; African American men have the highest incidence of prostate cancer in the world as well as the highest risk of prostate cancer death. As such, early detection is the key element for cure.