Alert archive / Indiana / Frost Advisories in 2025

Frost Advisory 5, NWS Northern Indiana

October 23, 20258 counties in Indiana; 6 counties in Ohio

NWS Northern Indiana issued this frost advisory at Oct 23, 2025, 2:12 AM EDT for 8 counties in Indiana; 6 counties in Ohio. It took effect at Oct 24, 2025, 12:00 AM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Oct 23, 2025, 2:12 AM EDT (06:12 UTC)
In effect from
Oct 24, 2025, 12:00 AM EDT
Expired
Oct 24, 2025, 9:00 AM EDT
In force
9 hr
Issued by
NWS Northern Indiana

Counties Allen County, IN, DeKalb County, IN, Kosciusko County, IN, LaPorte County, IN, Marshall County, IN, Noble County, IN, Starke County, IN, Whitley County, IN, Allen County, OH, Defiance County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH

The radar

The Northern Indiana radar (KIWX), 47 km from the middle of the area, began a volume at 06:13 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

Lincoln, IL (KILX), launched 00:00Z, 6.2 hours before the alert went out and 312 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, Lincoln, IL at 00:00Z on 2025-10-23Temperature 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, Lincoln, IL at 00:00Z on 2025-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.1939587897117136Sfc1 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
2349 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
125 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
Oct 23, 2:12 AM EDTFreeze WarningIWXAdams, Blackford, Cass, Fulton, Grant, Huntington and 6 more31 hr

Nearby

Frost Advisories in Indiana, 2025Frost Advisories in Ohio, 2025Every frost advisory in 2025

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.