Alert archive / Mississippi / Flash Flood Warnings in 2009

Flash Flood Warning 212, NWS Memphis, TN

September 23, 2009Monroe County, Mississippi

NWS Memphis, TN issued this flash flood warning at Sep 23, 2009, 5:52 PM CDT for Monroe 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, 5:52 PM CDT (22:52 UTC)
Expired: Sep 23, 2009, 8:45 PM CDT
In force: 3 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

County Monroe County, MS

The radar

The Columbus AFB radar (KGWX), 14 km from the middle of the area, began a volume at 22:53 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

Birmingham, AL (KBMX), launched 12:00Z, 10.9 hours before the alert went out and 176 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: 207 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 808 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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, 3:47 PM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, Sep 23, 3:47 PM CDT, 2 hours 5 minutes before

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Hazardous weather outlook, Sep 23, 3:55 PM CDT, 1 hour 57 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 22, 7:53 PM CDT	Flash Flood Warning	MEG	Chickasaw, Itawamba, Lafayette, Lee, Monroe, Pontotoc and 3 more	3 hr
Sep 22, 8:17 PM CDT	Flash Flood Warning	MEG	Alcorn, Prentiss, Tishomingo	3 hr
Sep 23, 11:26 AM CDT	River Flood Warning	MEG	Lowndes, Monroe	71 hr
Sep 22, 11:05 PM CDT	Areal Flood Warning	MEG	Hardin	8 hr
Sep 23, 4:30 PM CDT	Areal Flood Advisory	MEG	Chester, Henderson, Madison	3 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.