Alert archive / Mississippi / Flash Flood Warnings in 2009

Flash Flood Warning 214, NWS Memphis, TN

September 23, 2009Tallahatchie County, Mississippi

NWS Memphis, TN issued this flash flood warning at Sep 23, 2009, 8:52 PM CDT for Tallahatchie County, Mississippi. It was in force for 3 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: Sep 23, 2009, 8:52 PM CDT (01:52 UTC)
Expired: Sep 24, 2009, 12:00 AM CDT
In force: 3 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

County Tallahatchie County, MS

The radar

The Memphis radar (KNQA), 157 km from the middle of the area, began a volume at 01:51 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

Jackson, MS (KJAN), launched 00:00Z, 1.9 hours before the alert went out and 182 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: 1458 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 16 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 Sep 23, 6:10 PM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, Sep 23, 6:10 PM CDT, 2 hours 42 minutes before

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Hazardous weather outlook, Sep 23, 3:55 PM CDT, 4 hours 57 minutes before

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In the hours before

Local storm report, Sep 23, 7:02 PM CDT, 1 hour 50 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
Sep 23, 7:35 PM CDT	Flash Flood Warning	MEG	Benton, Tippah	113 min
Sep 24, 5:17 PM CDT	Flash Flood Warning	MEG	Calhoun, Chickasaw	3 hr
Sep 24, 4:56 PM CDT	Flash Flood Warning	MEG	Madison	2 hr

Nearby

Flash Flood Warnings in Mississippi, 2009 Every flash flood warning in 2009

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.