Alert archive / Arkansas / Flash Flood Warnings in 2010

Flash Flood Warning 217, NWS Memphis, TN

July 11, 2010Lawrence County, Randolph County, Arkansas

NWS Memphis, TN issued this flash flood warning at Jul 11, 2010, 10:22 PM CDT for Lawrence County, Randolph County, Arkansas. It was in force for 113 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: Jul 11, 2010, 10:22 PM CDT (03:22 UTC)
Expired: Jul 12, 2010, 12:15 AM CDT
In force: 113 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Lawrence County, AR, Randolph County, AR

The radar

The Memphis radar (KNQA), 143 km from the middle of the area, began a volume at 03:22 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 00:00Z, 3.4 hours before the alert went out and 256 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: 2169 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1374 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.5

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 Jul 11, 9:50 PM CDT, 32 minutes earlier.

Area forecast discussion, Jul 11, 9:50 PM CDT, 32 minutes before

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Hazardous weather outlook, Jul 11, 2:27 PM CDT, 7 hours 55 minutes before

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In the hours before

Special weather statement, Jul 11, 6:22 PM CDT, 4 hours before

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Special weather statement, Jul 11, 8:18 PM CDT, 2 hours 4 minutes before

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Special weather statement, Jul 11, 8:45 PM CDT, 1 hour 37 minutes before

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Special weather statement, Jul 11, 9:47 PM CDT, 35 minutes before

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Local storm report, Jul 11, 10:14 PM CDT, 8 minutes before

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Local storm report, Jul 11, 10:22 PM CDT, 0 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
Jul 11, 8:13 PM CDT	Flash Flood Warning	MEG	Carroll, Gibson, Henry, Weakley	2 hr
Jul 12, 2:47 AM CDT	Flash Flood Warning	MEG	Shelby	3 hr
Jul 12, 3:42 AM CDT	Flash Flood Warning	MEG	Shelby	3 hr
Jul 12, 4:21 AM CDT	Flash Flood Watch	MEG	Carroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more	30 hr
Jul 12, 5:39 AM CDT	Flash Flood Warning	MEG	Shelby, Tipton	3 hr
Jul 12, 6:36 AM CDT	Flash Flood Warning	MEG	Shelby	84 min
Jul 12, 7:54 AM CDT	Flash Flood Warning	MEG	Shelby	2 hr
Jul 12, 8:45 AM CDT	Flash Flood Warning	MEG	Shelby, Tipton	60 min
Jul 12, 8:51 AM CDT	Flash Flood Warning	MEG	Fayette, Hardeman, Shelby	114 min
Jul 12, 4:16 PM CDT	Areal Flood Advisory	MEG	Tipton	3 hr
Jul 12, 4:17 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Haywood, Lauderdale, Madison, Tipton	43 min
Jul 12, 4:46 PM CDT	Severe Thunderstorm Warning	MEG	Fayette, Haywood, Shelby, Tipton	24 min
Jul 12, 5:52 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Decatur, Henderson, Madison	38 min
Jul 11, 8:55 PM CDT	Severe Thunderstorm Warning	MEG	Greene, Lawrence, Randolph	34 min
Jul 11, 9:20 PM CDT	Flash Flood Warning	MEG	Clay, Greene, Lawrence, Randolph	3 hr
Jul 11, 10:15 PM CDT	Flash Flood Warning	MEG	Craighead, Greene, Mississippi	117 min
Jul 12, 1:40 AM CDT	Flash Flood Warning	MEG	Cross, Poinsett	5 hr
Jul 12, 3:52 AM CDT	Flash Flood Warning	MEG	Greene, Lawrence, Randolph	3 hr
Jul 12, 2:24 PM CDT	Severe Thunderstorm Warning	MEG	Craighead, Greene, Lawrence, Poinsett	51 min
Jul 12, 3:18 PM CDT	Severe Thunderstorm Warning	MEG	Clay, Craighead, Greene, Mississippi	30 min
Jul 12, 4:55 PM CDT	Severe Thunderstorm Warning	MEG	Lawrence	25 min
Jul 12, 4:57 PM CDT	Flash Flood Warning	MEG	Lawrence, Randolph	2 hr
Jul 12, 6:35 PM CDT	Severe Thunderstorm Warning	MEG	Lee, St. Francis	40 min
Jul 12, 6:42 PM CDT	Severe Thunderstorm Warning	MEG	Cross, Poinsett	48 min

Nearby

Flash Flood Warnings in Arkansas, 2010 Every flash flood warning in 2010

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.