Alert archive / Indiana / Frost Advisories in 2013

Frost Advisory 1, NWS Northern Indiana

May 12, 201312 counties in Indiana; Allen County, Van Wert County, Ohio

NWS Northern Indiana issued this frost advisory at May 12, 2013, 4:01 AM EDT for 12 counties in Indiana; Allen County, Van Wert County, Ohio. It took effect at May 13, 2013, 4:00 AM EDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 12, 2013, 4:01 AM EDT (08:01 UTC)
In effect from
May 13, 2013, 4:00 AM EDT
Expired
May 13, 2013, 8:15 AM EDT
In force
4 hr
Issued by
NWS Northern Indiana

Counties Adams County, IN, Blackford County, IN, Cass County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Miami County, IN, Pulaski County, IN, Wabash County, IN, Wells County, IN, White County, IN, Allen County, OH, Van Wert County, OH

The radar

The Northern Indiana radar (KIWX), 68 km from the middle of the area, began a volume at 08:00 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, 8.0 hours before the alert went out and 212 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 2013-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2013-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.19395878Sfc1 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
755 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 12, 4:01 AM EDTFreeze WarningIWXAllen, DeKalb, Elkhart, LaGrange, Marshall, Noble and 3 more28 hr

Nearby

Frost Advisories in Indiana, 2013Frost Advisories in Ohio, 2013Every frost advisory in 2013

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.