But if a hard clicking persists or is accompanied by any kind of repeating clunking (or grinding) sound, then there is likely a physical issue with the drive. Mentioned above, a solitary hard clicking sound can mean the heads are getting parked. A healthy drive emits mild and regular sounds of whirring. Compare multiple drives when possible to establish a normal vibration baseline. Listen for irregularities in the vibrations as well. While all spinning drives will cause a modicum of vibration, a faulty drive can experience exaggerated and abnormal vibrations. When HDDs spin, they create vibrations and vibrations from an HDD sitting on a desk may cause other objects on the desk, or even the desk itself, to emit a sound. These can also produce sounds which can be more noticeable in warmer environments where the fan will kick in sooner and more often – this sounds like the HDD whirring mentioned above. Some external drive enclosures have internal fans, especially devices with multiple hard drives. The HDD’s heads, which read and write the data, are constantly making rapid movements as well – this usually sounds like an occasional soft click during use but can sound like a hard click when the heads get parked, for example during shutdown or when entering sleep mode. The outdoor warning sirens are not intended to warn people indoors.While an HDD is reading or writing data, the disk’s platters are spinning rapidly – this typically emits a whirring sound and can be more pronounced when an HDD is winding up or down. Even if not actively being accessed by a user, hard drives are often used by the computer in the background, for example, during automatic indexing. Remember, outdoor warning sirens are intended to notify people who are outdoors that there is a severe weather situation occurring, and they should seek shelter immediately. Hamilton County Emergency Management recommends every household in the county have a radio as a way to receive important information even if power and the internet are out. Weather radios are inexpensive and may include battery backup, solar charging, hand-crack power, or a USB connection to charge cell phones. The best way to receive watches, warnings, and emergency messages is through an NOAA All-Hazards Weather Radio. National Oceanic and Atmospheric Administration (NOAA) All-Hazards Weather Alert Radios The system checks for communications, battery status, and many other settings year-round to ensure the system is always ready for activation. For example, if the power goes out at a siren site, a message is sent to the system administrators stating the siren is on battery backup power. The system continuously checks the sirens to ensure they are in working order. If maintenance is required, the siren own will contact their service provider to repair the siren. The information is reviewed for any potential issues. The sirens are automatically sounded, and a report is sent to siren owners. Hamilton County tests all sirens on Fridays at 11:00 a.m., starting the Friday before the statewide tornado drill and ending last Friday in October. As communities have expanded, so have the sirens. Sirens began being used for tornado warnings. Civil Defense eventually transitioned to Emergency Management, taking an all-hazards approach. History and Why SirensĬivil Defense first installed sirens as air raid sirens to warn the public of a possible attack or nuclear war. Sirens could potentially be used to alert people of a shelter in place or evacuation order however, this would be done at the direction of the siren owner. To know if the all-clear is given, listen to your NOAA Weather Radio for the warning to expire or listen to NOAA Weather Radio on the free Hamilton County Emergency Management, Indiana App. Most of the outdoor warning sirens are capable of producing multiple tones (wail, steady, and fast wail) however, only the wail tone is used for severe weather. The only time all 75 sirens will be activated is if a tornado warning polygon includes the entire county. For example, if a tornado warning by the National Weather Service includes a portion of Noblesville, all of the Noblesville sirens will be sounded. Sirens are grouped geographically by the municipality and sounded together when the warning criteria are met. Hamilton County Emergency Management sounds the sirens when the National Weather Service issues a tornado warning or when a trained weather spotter or public safety personnel sees a funnel cloud or tornado. White River Campground - 1 (owned/maintained by Hamilton County).The City of Westfield and Westfield-Washington Township - 8.The City of Noblesville and Noblesville Township - 19.The City of Fishers, including Delaware and Fall Creek Townships - 20.The City of Carmel and Clay Township - 21.There are currently 75 outdoor warning sirens in Hamilton County:
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