Alert archive / Indiana / Winter Weather Advisories in 2012

Winter Weather Advisory 5, NWS Indianapolis, IN

December 25, 20125 counties in Indiana

NWS Indianapolis, IN issued this winter weather advisory at Dec 25, 2012, 4:43 AM EST for 5 counties in Indiana. It took effect at Dec 26, 2012, 3:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 25, 2012, 4:43 AM EST (09:43 UTC)
In effect from
Dec 26, 2012, 3:00 AM EST
Expired
Dec 25, 2012, 12:45 PM EST
In force
Issued by
NWS Indianapolis, IN

Counties Carroll County, IN, Fountain County, IN, Tippecanoe County, IN, Vermillion County, IN, Warren County, IN

The radar

The Indianapolis radar (KIND), 93 km from the middle of the area, began a volume at 09:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.7 hours before the alert went out and 297 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2012-12-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 00:00Z on 2012-12-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
446 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 25, 4:43 AM ESTWinter Storm WarningINDBartholomew, Boone, Brown, Clay, Clinton, Daviess and 28 more8 hr
Dec 25, 12:45 PM ESTBlizzard WarningINDBartholomew, Boone, Brown, Clay, Clinton, Daviess and 28 more26 hr
Dec 25, 12:45 PM ESTWinter Storm WarningINDCarroll, Fountain, Tippecanoe, Vermillion, Warren26 hr

Nearby

Winter Weather Advisories in Indiana, 2012Every winter weather advisory in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.