Alert archive / Mississippi / Flash Flood Warnings in 2009

Flash Flood Warning 188, NWS Memphis, TN

September 17, 20097 counties in Mississippi; Phillips County, Arkansas

NWS Memphis, TN issued this flash flood warning at Sep 17, 2009, 2:37 PM CDT for 7 counties in Mississippi; Phillips County, Arkansas. 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 17, 2009, 2:37 PM CDT (19:37 UTC)
Expired: Sep 17, 2009, 5:45 PM CDT
In force: 3 hr
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Flood severity: None

Counties Phillips County, AR, Calhoun County, MS, Coahoma County, MS, Lafayette County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Yalobusha County, MS

The radar

The Memphis radar (KNQA), 129 km from the middle of the area, began a volume at 19:39 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

Little Rock, AR (KLZK), launched 12:00Z, 7.6 hours before the alert went out and 71 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: 353 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 452 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 44 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 17, 2:11 PM CDT, 26 minutes earlier.

Area forecast discussion, Sep 17, 2:11 PM CDT, 26 minutes before

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Hazardous weather outlook, Sep 17, 3:12 AM CDT, 11 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MEMPHIS TN
312 AM CDT THU SEP 17 2009

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-181015-
ALCORN-BENTON MS-CALHOUN-CARROLL-CHESTER-CHICKASAW-CLAY-COAHOMA-
CRAIGHEAD-CRITTENDEN-CROCKETT-CROSS-DESOTO-DECATUR-DUNKLIN-DYER-
FAYETTE-GIBSON-GREENE-HARDEMAN-HARDIN-HAYWOOD-HENDERSON-HENRY-
ITAWAMBA-LAFAYETTE-LAKE-LAUDERDALE-LAWRENCE-LEE AR-LEE MS-MADISON-
MARSHALL-MCNAIRY-MISSISSIPPI-MONROE-OBION-PANOLA-PEMISCOT-
PHILLIPS-POINSETT-PONTOTOC-PRENTISS-QUITMAN-RANDOLPH-SHELBY-
ST. FRANCIS-TALLAHATCHIE-TATE-TIPPAH-TIPTON-TISHOMINGO-TUNICA-
UNION-WEAKLEY-YALOBUSHA-
312 AM CDT THU SEP 17 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST ARKANSAS...
THE MISSOURI BOOTHEEL...NORTH MISSISSIPPI...AND WEST TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE MIDSOUTH. NUMEROUS SHOWERS
AND THUNDERSTORMS WILL REPEATEDLY MOVE OVER THE WATCH AREA WITH VERY
HEAVY RAINFALL RATES. SEVERAL INCHES OF RAIN WILL BE POSSIBLE OVER
THESE AREAS WHICH MAY LEAD TO FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A THREAT FOR LOCALLY HEAVY RAINFALL WILL CONTINUE OVER THE MIDSOUTH
THROUGH THE END OF THE WEEK. PLEASE CONTINUE TO MONITOR THE LATEST
FORECASTS FOR ADDITIONAL INFORMATION CONCERNING THE THREAT OF
HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

STORM SPOTTERS...EMERGENCY MANAGEMENT...AND LAW ENFORCEMENT
OFFICIALS ARE ENCOURAGED TO REPORT ANY FLOODING TO THE NATIONAL
WEATHER SERVICE FORECAST OFFICE IN MEMPHIS.

In the hours before

Local storm report, Sep 17, 10:24 AM CDT, 4 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
1024 AM CDT THU SEP 17 2009

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1015 AM     FLASH FLOOD      3 N NEW ALBANY          34.53N 89.02W
09/17/2009                   UNION              MS   LAW ENFORCEMENT

            FLOODING ALONG HIGHWAY 15 IN THE TOWN OF NORTH HAVEN.

&&

CCD

Local storm report, Sep 17, 10:49 AM CDT, 3 hours 48 minutes before

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Local storm report, Sep 17, 11:14 AM CDT, 3 hours 23 minutes before

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Local storm report, Sep 17, 1:25 PM CDT, 1 hour 12 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 16, 7:08 PM CDT	Flash Flood Warning	MEG	Coahoma, Panola, Quitman, Tallahatchie, Tunica, Yalobusha	3 hr
Sep 16, 10:13 PM CDT	Areal Flood Advisory	MEG	Calhoun, Lafayette, Lee, Pontotoc, Union, Yalobusha	2 hr
Sep 17, 9:16 AM CDT	Flash Flood Warning	MEG	Prentiss, Tippah, Union	4 hr
Sep 17, 10:37 AM CDT	Flash Flood Warning	MEG	Alcorn, Benton, Lafayette, Marshall, Prentiss, Tippah and 1 more	3 hr
Sep 17, 1:04 PM CDT	Areal Flood Advisory	MEG	Tishomingo	75 min
Sep 17, 1:29 PM CDT	Areal Flood Advisory	MEG	Coahoma	3 hr
Sep 17, 2:08 PM CDT	Areal Flood Advisory	MEG	Lafayette	3 hr
Sep 17, 9:14 AM CDT	Flash Flood Warning	MEG	Hardin	3 hr
Sep 16, 8:08 PM CDT	Flash Flood Warning	MEG	Phillips	2 hr

Nearby

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