Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 263, NWS Memphis, TN
NWS Memphis, TN issued this severe thunderstorm warning at Jul 4, 2009, 7:32 PM CDT for 5 counties in Tennessee. It was in force for 43 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 4, 2009, 7:32 PM CDT (00:32 UTC)
- Expired
- Jul 4, 2009, 8:15 PM CDT
- In force
- 43 min
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
Counties Crockett County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Lauderdale County, TN
The radar
The Memphis radar (KNQA), 77 km from the middle of the area, began a volume at 00:33 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 00:00Z, 0.5 hours before the alert went out and 128 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.
- Mixed-layer CAPE
- 1875 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1194 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.4
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 4, 7:19 PM CDT, 13 minutes earlier.
Area forecast discussion, Jul 4, 7:19 PM CDT, 13 minutes before
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</html>Hazardous weather outlook, Jul 4, 4:06 PM CDT, 3 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE MEMPHIS TN 406 PM CDT SAT JUL 4 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>092-051100- 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- 406 PM CDT SAT JUL 4 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST ARKANSAS... THE MISSOURI BOOTHEEL...NORTH MISSISSIPPI...AND WEST TENNESSEE. .DAY ONE...THIS AFTERNOON AND TONIGHT A FEW THUNDERSTORMS MAY BECOME SEVERE ACROSS PORTIONS OF EAST ARKANSAS AND WEST TENNESSEE TONIGHT. THE TIME OF GREATEST THREAT FOR SEVERE THUNDERSTORMS IS FROM 4 PM TO 11 PM. ANY THUNDERSTORMS THAT BECOME SEVERE WILL PRODUCE DAMAGING WINDS AND PERHAPS LARGE HAIL. HEAVY RAINFALL IS ALSO POSSIBLE WITH THESE THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A FEW THUNDERSTORMS MAY BECOME STRONG TO PERHAPS SEVERE ACROSS THE NORTH MISSISSIPPI SUNDAY AS A COLD FRONT MOVES THROUGH THE REGION. LARGE HAIL AND DAMAGING WINDS ARE THE MAIN SEVERE WEATHER THREATS FOR ANY THUNDERSTORMS THAT BECOME SEVERE ACROSS NORTH MISSISSIPPI ON SUNDAY. .SPOTTER INFORMATION STATEMENT... STORM SPOTTER ACTIVATION WILL LIKELY BE NEEDED LATER THIS AFTERNOON AND TONIGHT AND AGAIN ON SUNDAY IN SUPPORT OF SEVERE WEATHER OPERATIONS. CJC
In the hours before
Special weather statement, Jul 4, 5:59 PM CDT, 1 hour 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MEMPHIS TN 559 PM CDT SAT JUL 4 2009 ARZ028-TNZ019-048-050-051-042330- MISSISSIPPI AR-CROCKETT TN-LAUDERDALE TN-HAYWOOD TN-DYER TN- 559 PM CDT SAT JUL 4 2009 ...THIS SIGNIFICANT WEATHER ALERT IS FOR... NORTHEASTERN MISSISSIPPI COUNTY IN EASTERN ARKANSAS... WEST CENTRAL CROCKETT COUNTY IN NORTHWEST TENNESSEE... SOUTHERN DYER COUNTY IN NORTHWEST TENNESSEE... EXTREME NORTHWESTERN HAYWOOD COUNTY IN SOUTHWEST TENNESSEE... NORTHERN LAUDERDALE COUNTY IN SOUTHWEST TENNESSEE... A STRONG THUNDERSTORM PRODUCING PEA TO DIME SIZE HAIL AND 40 TO 50 MPH WINDS WAS LOCATED 16 MILES WEST OF UNIONVILLE AT 559 PM CDT... MOVING EAST AT 25 MPH. PEOPLE IN CROCKETT...DYER...HAYWOOD...LAUDERDALE AND MISSISSIPPI COUNTIES SHOULD MONITOR THIS STORM CLOSELY THIS SIGNIFICANT WEATHER ALERT IS IN EFFECT UNTIL 630 PM CDT. THIS SIGNIFICANT WEATHER ALERT ALSO INCLUDES CHISHOLM LAKE AND OPEN LAKE.
Special weather statement, Jul 4, 6:32 PM CDT, 1 hour before
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</html>Special weather statement, Jul 4, 7:09 PM CDT, 23 minutes before
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</html>The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 3:02 AM CDT | Flash Flood Warning | MEG | DeSoto, Tate, Tunica | 2 hr |
| Jul 5, 4:05 AM CDT | Severe Thunderstorm Warning | MEG | DeSoto, Marshall, Tate | 30 min |
| Jul 5, 7:43 AM CDT | Areal Flood Advisory | MEG | Lee, Pontotoc, Union | 92 min |
| Jul 5, 7:59 AM CDT | Severe Thunderstorm Warning | MEG | Itawamba, Lee, Monroe | 46 min |
| Jul 5, 8:32 AM CDT | Severe Thunderstorm Warning | MEG | Monroe | 28 min |
| Jul 4, 7:41 PM CDT | Severe Thunderstorm Warning | MEG | Crockett, Gibson, Haywood, Madison | 40 min |
| Jul 4, 10:39 PM CDT | Areal Flood Advisory | MEG | Carroll, Gibson, Henry, Obion, Weakley | 2 hr |
| Jul 4, 11:19 PM CDT | Flash Flood Warning | MEG | Carroll, Decatur, Gibson, Henderson, Weakley | 4 hr |
| Jul 5, 12:26 AM CDT | Severe Thunderstorm Warning | MEG | Carroll, Henderson | 49 min |
| Jul 5, 12:33 AM CDT | Tornado Warning | MEG | Carroll, Henderson, Madison | 42 min |
| Jul 5, 1:12 AM CDT | Severe Thunderstorm Warning | MEG | Carroll, Decatur, Henderson | 48 min |
| Jul 5, 1:54 AM CDT | Severe Thunderstorm Warning | MEG | Fayette, Hardeman, Haywood, Madison | 40 min |
| Jul 5, 2:58 AM CDT | Flash Flood Warning | MEG | Chester, Decatur, Hardin, Henderson, McNairy | 63 min |
| Jul 5, 3:07 PM CDT | Areal Flood Advisory | MEG | Decatur, Henderson | 113 min |
| Jul 5, 4:08 PM CDT | Areal Flood Advisory | MEG | Fayette, Shelby | 3 hr |
| Jul 5, 4:21 PM CDT | Flash Flood Warning | MEG | Fayette, Shelby | 3 hr |
| Jul 5, 12:53 PM CDT | Areal Flood Advisory | MEG | Cross | 2 hr |
| Jul 5, 2:13 PM CDT | Areal Flood Advisory | MEG | Lee, St. Francis | 3 hr |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2009Every severe thunderstorm 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.