Winter weather advisory issued ahead of ice storm for parts of Indiana
The National Weather Services in Indianapolis issued a winter weather advisory for counties north of the capital city, including Hamilton and Tippecanoe counties. The advisory predicts freezing rain will accumulate to concerning levels for evening commuters.
Meteorologists from the National Weather Services of Indianapolis noted that during the first few hours of the freezing rainstorm, temperatures in parts of northern Indiana will be below freezing, which could lead to slick roads.
"This could be isolated, ground temperatures are about 35 degrees, so the ground is warm enough not to allow for ice (accumulation)," said Matthew Eckhoff, a meteorologist with the NWS Indianapolis.
The winter weather advisory will be in effect from 5 p.m. this evening to 4 a.m. tomorrow, but meteorologists believe conditions should normalize through most of northern Indiana by 2 a.m. tomorrow.
"Pockets of ice could still remain up until 4 a.m.," Eckhoff said. "By the morning commute of Thursday, it looks like everyone should be above freezing and experience regular rain, and things should be mostly fine."
With NWS Indianapolis meteorologists expecting Indiana to be hit with notable weather conditions soon, here are the criteria the National Weather Service uses to determine when winter weather-related issues ought to be considered an advisory, watch or warning.
NWS will place a winter weather advisory when the weather is wintry but does not showcase any other severe weather elements. For example, if the NWS expects light amounts of precipitation or snow that could cause slick driving conditions.
A winter weather watch will be alert if the NWS determines that conditions could indicate a winter storm is expected to hit a region. Severe weather conditions that meteorologists might highlight are heavy snow, sleet or freezing rain, which could cause significant impacts to travel.
The NWS will alert a winter storm warning if meteorologists believe weather conditions will be significantly severe and expect hazardous conditions to hit an area.
In the case of ice storms, the NWS will alert an ice storm warning if meteorologists expect ice accumulation of 1/4 inch or more on all surfaces.
Other notable advisories, watches or warnings may alert people about:
Sleet advisory: If a region is expected to have up to 2 inches of sleet on the road.
Sleet warning: If a region is expected to have more than 2 inches or more of sleet.
Freezing rain advisory: If a region will receive less than one-quarter of an inch of ice.
Freezing rain warning: if a region will receive a quarter of an inch or more of ice.
The NWS notes that these criteria are just one component when determining if a regional NWS station should issue watches, warnings and advisories. The NWS also looks at the timing, impacts and duration of an event in addition to criteria for making its decision.
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If you encounter a downed traffic signal or a limb blocking a roadway, contact the Mayor's Action Center at 317-327-4622 or online at RequestIndy.gov. When calling after hours, press "2" to be connected.
Check road conditions, including road closures, crashes and live webcams using Indiana's online Trafficwise map at 511in.org, or visit our gridlock guide page for live traffic cams and more.
INDOT's CARS Program provides information about road conditions, closures and width and weight restrictions. The website has a color-coded map of Indiana's highways and highlights hazardous road conditions and travel delays.
The interactive map also shows road work warnings, closures, roadway restrictions and other information helpful to drivers.
This article originally appeared on Indianapolis Star: Winter weather advisory issued ahead of ice storm for parts of Indiana
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