Alert archive / Mississippi / Flash Flood Warnings in 2010

Flash Flood Warning 248, NWS Memphis, TN

July 17, 2010Lafayette County, Panola County, Tate County, Mississippi

NWS Memphis, TN issued this flash flood warning at Jul 17, 2010, 8:38 AM CDT for Lafayette County, Panola County, Tate County, Mississippi. It was in force for 2 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: Jul 17, 2010, 8:38 AM CDT (13:38 UTC)
Expired: Jul 17, 2010, 11:03 AM CDT
In force: 2 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Lafayette County, MS, Panola County, MS, Tate County, MS

The radar

The Memphis radar (KNQA), 99 km from the middle of the area, began a volume at 13:39 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 12:00Z, 1.6 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: 1725 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 50 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 Jul 17, 6:27 AM CDT, 2 hours 11 minutes earlier.

Area forecast discussion, Jul 17, 6:27 AM CDT, 2 hours 11 minutes before

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Hazardous weather outlook, Jul 17, 4:17 AM CDT, 4 hours 21 minutes before

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In the hours before

Local storm report, Jul 17, 7:35 AM CDT, 1 hour 3 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 16, 7:30 PM CDT	Heat Advisory	MEG	Crockett, Dyer, Gibson, Henry, Lake, Lauderdale and 4 more	19 hr
Jul 17, 3:11 PM CDT	Heat Advisory	MEG	Crockett, Dyer, Fayette, Gibson, Haywood, Lake and 5 more	28 hr
Jul 16, 8:29 PM CDT	Flash Flood Warning	MEG	Panola, Quitman, Tallahatchie, Yalobusha	2 hr
Jul 16, 8:37 PM CDT	Flash Flood Warning	MEG	Lee, Phillips	113 min

Nearby

Flash Flood Warnings in Mississippi, 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.