Alert archive / Kentucky / Flash Flood Watches in 2011

Flash Flood Watch 5, NWS Paducah, KY

April 29, 201122 counties in Kentucky; 19 counties in Illinois; 11 counties in Missouri

NWS Paducah, KY issued this flash flood watch at Apr 29, 2011, 8:35 PM CDT for 22 counties in Kentucky; 19 counties in Illinois; 11 counties in Missouri. It took effect at Apr 30, 2011, 7:00 PM CDT. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued: Apr 29, 2011, 8:35 PM CDT (01:35 UTC)
In effect from: Apr 30, 2011, 7:00 PM CDT
Expired: May 1, 2011, 10:27 PM CDT
In force: 27 hr
Issued by: NWS Paducah, KY
Flood severity: None

All 52 counties

Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 31 km from the middle of the area, began a volume at 01:36 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

Nashville Metro, TN (KBNA), launched 00:00Z, 1.6 hours before the alert went out and 232 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: 2454 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 126 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Paducah, KY wrote its last area forecast discussion before this flash flood watch went out at Apr 29, 6:18 PM CDT, 2 hours 17 minutes earlier.

Area forecast discussion, Apr 29, 6:18 PM CDT, 2 hours 17 minutes before

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Hazardous weather outlook, Apr 29, 2:09 PM CDT, 6 hours 26 minutes before

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In the hours before

Local storm report, Apr 29, 5:04 PM CDT, 3 hours 31 minutes before

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Local storm report, Apr 29, 5:08 PM CDT, 3 hours 27 minutes before

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Local storm report, Apr 29, 6:54 PM CDT, 1 hour 41 minutes before

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Local storm report, Apr 29, 6:56 PM CDT, 1 hour 39 minutes before

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Local storm report, Apr 29, 7:52 PM CDT, 43 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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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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The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 30, 4:18 AM CDT	Lake Wind Advisory	PAH	Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more	14 hr

Nearby

Flash Flood Watches in Kentucky, 2011 Flash Flood Watches in Illinois, 2011 Flash Flood Watches in Missouri, 2011 Every flash flood watch in 2011

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.