Alert archive / Indiana / Extreme Cold Warnings in 2025

Extreme Cold Warning 1, NWS Indianapolis, IN

December 13, 202518 counties in Indiana

NWS Indianapolis, IN issued this extreme cold warning at Dec 13, 2025, 2:48 PM EST for 18 counties in Indiana. It took effect at Dec 14, 2025, 12:00 AM EST. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 13, 2025, 2:48 PM EST (19:48 UTC)
In effect from: Dec 14, 2025, 12:00 AM EST
Expired: Dec 14, 2025, 11:00 AM EST
In force: 11 hr
Issued by: NWS Indianapolis, IN

Counties Boone County, IN, Carroll County, IN, Clay County, IN, Clinton County, IN, Fountain County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Madison County, IN, Marion County, IN, Montgomery County, IN, Parke County, IN, Putnam County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN

The radar

The Indianapolis radar (KIND), 50 km from the middle of the area, began a volume at 19:51 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 12:00Z, 7.8 hours before the alert went out and 163 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1028 m above ground
0-6 km bulk shear: 84 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this extreme cold warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Indianapolis, IN wrote its last area forecast discussion before this extreme cold warning went out at Dec 13, 12:21 PM EST, 2 hours 27 minutes earlier.

Area forecast discussion, Dec 13, 12:21 PM EST, 2 hours 27 minutes before

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Hazardous weather outlook, Dec 13, 3:50 AM EST, 10 hours 58 minutes before

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In the hours before

Local storm report, Dec 13, 2:18 PM EST, 30 minutes before

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Local storm report, Dec 13, 2:20 PM EST, 28 minutes before

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Local storm report, Dec 13, 2:27 PM EST, 21 minutes before

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Local storm report, Dec 13, 2:41 PM EST, 7 minutes before

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        Please try again in a few minutes.
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Local storm report, Dec 13, 2:43 PM EST, 5 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Dec 13, 2:48 PM EST, 0 minutes before

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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 13, 3:10 AM EST	Winter Storm Warning	IND	Bartholomew, Boone, Clay, Clinton, Decatur, Delaware and 21 more	18 hr

Nearby

Extreme Cold Warnings in Indiana, 2025 Every extreme cold warning 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.