Alert archive / Louisiana / Flash Flood Warnings in 2010

Flash Flood Warning 2, NWS New Orleans, LA

April 23, 20106 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at Apr 23, 2010, 3:08 PM CDT for 6 parishes in Louisiana. It was in force for 79 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 23, 2010, 3:08 PM CDT (20:08 UTC)
Expired: Apr 23, 2010, 4:27 PM CDT
In force: 79 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.1 hours before the alert went out and 284 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: 37 J/kg
Mixed-layer CIN: -425 J/kg
Mixed-layer LCL: 519 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 154 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this flash flood warning went out at Apr 23, 2:32 PM CDT, 36 minutes earlier.

Area forecast discussion, Apr 23, 2:32 PM CDT, 36 minutes before

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Hazardous weather outlook, Apr 23, 10:27 AM CDT, 4 hours 41 minutes before

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In the hours before

Special weather statement, Apr 23, 12:52 PM CDT, 2 hours 16 minutes before

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Special weather statement, Apr 23, 1:44 PM CDT, 1 hour 24 minutes before

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Special weather statement, Apr 23, 2:14 PM CDT, 54 minutes before

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Local storm report, Apr 23, 2:53 PM CDT, 15 minutes before

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        Please try again in a few minutes.
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Special weather statement, Apr 23, 2:57 PM CDT, 11 minutes before

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      <p id="message2">
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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, Apr 23, 2:58 PM CDT, 10 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.
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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 New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 23, 4:22 AM CDT	Small Craft Advisory	LIX		42 hr
Apr 23, 2:02 PM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Saint Charles	28 min
Apr 23, 2:30 PM CDT	Areal Flood Advisory	LIX	Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more	2 hr
Apr 23, 3:39 PM CDT	Special Marine Warning	LIX		2 hr
Apr 23, 3:52 PM CDT	Areal Flood Advisory	LIX	Saint Tammany	113 min

Nearby

Flash Flood Warnings in Louisiana, 2010 Every flash flood warning in 2010

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.