Alert archive / Arkansas / Flash Flood Warnings in 2009

Flash Flood Warning 235, NWS Memphis, TN

December 24, 2009Coahoma County, Tunica County, Mississippi; Tipton County, Tennessee; 12 counties in Arkansas

NWS Memphis, TN issued this flash flood warning at Dec 24, 2009, 12:24 PM CST for Coahoma County, Tunica County, Mississippi; Tipton County, Tennessee; 12 counties in Arkansas. It was in force for 4 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: Dec 24, 2009, 12:24 PM CST (18:24 UTC)
Expired: Dec 24, 2009, 4:30 PM CST
In force: 4 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Coahoma County, MS, Tunica County, MS, Tipton County, TN

The radar

The Memphis radar (KNQA), 64 km from the middle of the area, began a volume at 18:28 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

Springfield, MO (KSGF), launched 12:00Z, 6.4 hours before the alert went out and 333 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: 5 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 657 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 15 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 Dec 24, 12:11 PM CST, 13 minutes earlier.

Area forecast discussion, Dec 24, 12:11 PM CST, 13 minutes before

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Hazardous weather outlook, Dec 24, 3:20 AM CST, 9 hours 4 minutes before

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In the hours before

Local storm report, Dec 24, 7:10 AM CST, 5 hours 14 minutes before

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Local storm report, Dec 24, 7:11 AM CST, 5 hours 13 minutes before

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Local storm report, Dec 24, 9:40 AM CST, 2 hours 44 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
Dec 24, 4:19 PM CST	Areal Flood Warning	MEG	Coahoma, Tunica	13 hr
Dec 23, 8:28 PM CST	Areal Flood Advisory	MEG	Clay, Craighead, Cross, Greene, Lawrence, Poinsett and 1 more	3 hr
Dec 23, 8:30 PM CST	Flash Flood Watch	MEG	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more	22 hr
Dec 23, 11:30 PM CST	Flash Flood Warning	MEG	Clay, Craighead, Cross, Greene, Lawrence, Mississippi and 3 more	13 hr
Dec 24, 8:18 AM CST	River Flood Warning	MEG	Lee, St. Francis	8 days
Dec 24, 8:18 AM CST	River Flood Warning	MEG	Craighead	8 days
Dec 24, 8:18 AM CST	River Flood Warning	MEG	Mississippi, Poinsett	25 hr

Nearby

Flash Flood Warnings in Arkansas, 2009 Flash Flood Warnings in Mississippi, 2009 Flash Flood Warnings in Tennessee, 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.