Alert archive / Tennessee / Flash Flood Warnings in 2008

Flash Flood Warning 109, NWS Memphis, TN

June 12, 2008Hardeman County, Tennessee

NWS Memphis, TN issued this flash flood warning at Jun 12, 2008, 3:50 PM CDT for Hardeman County, Tennessee. It was in force for 115 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: Jun 12, 2008, 3:50 PM CDT (20:50 UTC)
Expired: Jun 12, 2008, 5:45 PM CDT
In force: 115 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

County Hardeman County, TN

The radar

The Memphis radar (KNQA), 81 km from the middle of the area, began a volume at 20:53 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 12:00Z, 8.8 hours before the alert went out and 239 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: 396 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: -26 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 Memphis, TN wrote its last area forecast discussion before this flash flood warning went out at Jun 12, 3:50 PM CDT, 0 minutes earlier.

Area forecast discussion, Jun 12, 3:50 PM CDT, 0 minutes before

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In the hours before

Special weather statement, Jun 12, 2:44 PM CDT, 1 hour 6 minutes before

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Special weather statement, Jun 12, 3:14 PM CDT, 36 minutes before

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Special weather statement, Jun 12, 3:21 PM CDT, 29 minutes before

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Local storm report, Jun 12, 3:42 PM CDT, 8 minutes before

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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 2:53 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto	18 min
Jun 12, 3:45 PM CDT	Flash Flood Warning	MEG	Calhoun	2 hr

Nearby

Flash Flood Warnings in Tennessee, 2008 Every flash flood warning in 2008

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.