Alert archive / Indiana / Areal Flood Advisories in 2021

Areal Flood Advisory 33, NWS Northern Indiana

August 7, 2021Elkhart County, Saint Joseph County, Indiana; Cass County, Michigan

NWS Northern Indiana issued this areal flood advisory at Aug 7, 2021, 12:23 AM EDT for Elkhart County, Saint Joseph County, Indiana; Cass County, Michigan. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Aug 7, 2021, 12:23 AM EDT (04:23 UTC)
Expired: Aug 7, 2021, 3:30 AM EDT
In force: 3 hr
Issued by: NWS Northern Indiana
Area: Storm-based polygon

Counties Elkhart County, IN, Saint Joseph County, IN, Cass County, MI

The radar

The Northern Indiana radar (KIWX), 49 km from the middle of the area, began a volume at 04:26 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, 4.4 hours before the alert went out and 276 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: 1366 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 152 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 areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Northern Indiana wrote its last area forecast discussion before this areal flood advisory went out at Aug 6, 7:34 PM EDT, 4 hours 49 minutes earlier.

Area forecast discussion, Aug 6, 7:34 PM EDT, 4 hours 49 minutes before

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Hazardous weather outlook, Aug 6, 3:25 PM EDT, 8 hours 58 minutes before

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In the hours before

Special weather statement, Aug 6, 8:07 PM EDT, 4 hours 16 minutes before

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Local storm report, Aug 6, 8:53 PM EDT, 3 hours 30 minutes before

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Special weather statement, Aug 6, 9:31 PM EDT, 2 hours 52 minutes before

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Local storm report, Aug 6, 9:34 PM EDT, 2 hours 49 minutes before

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      </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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Local storm report, Aug 6, 10:18 PM EDT, 2 hours 5 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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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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Special weather statement, Aug 6, 11:09 PM EDT, 1 hour 14 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <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.
      </p>
      <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 Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 8:00 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko	30 min
Aug 6, 8:30 PM EDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, LaGrange, Noble	45 min
Aug 6, 9:31 PM EDT	Special Weather Statement	IWX	DeKalb	44 min
Aug 6, 11:09 PM EDT	Special Weather Statement	IWX	LaPorte	36 min
Aug 7, 12:57 AM EDT	Special Weather Statement	IWX	Marshall	33 min
Aug 7, 1:21 AM EDT	Special Weather Statement	IWX	Kosciusko	24 min
Aug 7, 2:18 AM EDT	Special Weather Statement	IWX	Noble	27 min
Aug 7, 3:13 AM EDT	Special Weather Statement	IWX	Huntington, Wabash	32 min
Aug 7, 3:44 AM EDT	Special Weather Statement	IWX	Pulaski	31 min
Aug 7, 5:25 AM EDT	Special Weather Statement	IWX	Fulton	35 min
Aug 7, 5:28 AM EDT	Special Weather Statement	IWX	Kosciusko	32 min
Aug 7, 11:58 AM EDT	Special Weather Statement	IWX	Allen	32 min
Aug 7, 12:08 PM EDT	Severe Thunderstorm Warning	IWX	Allen	37 min
Aug 7, 5:01 PM EDT	Special Weather Statement	IWX	Huntington	29 min
Aug 7, 1:43 PM EDT	Special Weather Statement	IWX	Allen	47 min
Aug 6, 8:07 PM EDT	Special Weather Statement	IWX	Branch	53 min
Aug 6, 8:33 PM EDT	Severe Thunderstorm Warning	IWX	Branch, Hillsdale	39 min
Aug 7, 12:54 AM EDT	Areal Flood Advisory	IWX	Saint Joseph	3 hr

Nearby

Areal Flood Advisories in Indiana, 2021 Areal Flood Advisories in Michigan, 2021 Every areal flood advisory in 2021

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.