Alert archive / Mississippi / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 436, NWS Memphis, TN

December 8, 20094 counties in Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Dec 8, 2009, 6:19 PM CST for 4 counties in Mississippi. It was in force for 26 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
Dec 8, 2009, 6:19 PM CST (00:19 UTC)
Expired
Dec 8, 2009, 6:45 PM CST
In force
26 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon

Counties Lafayette County, MS, Panola County, MS, Tallahatchie County, MS, Yalobusha County, MS

The radar

The Memphis radar (KNQA), 130 km from the middle of the area, began a volume at 00:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Dec 8, 5:48 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 0.3 hours before the alert went out and 74 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-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 2009-12-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2009-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
426 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
-12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

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 Dec 8, 5:35 PM CST, 44 minutes earlier.

Area forecast discussion, Dec 8, 5:35 PM CST, 44 minutes before
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Hazardous weather outlook, Dec 8, 6:08 PM CST, 11 minutes before
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In the hours before

Local storm report, Dec 8, 3:55 PM CST, 2 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEMPHIS TN
355 PM CST TUE DEC 08 2009

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

0354 PM     FLASH FLOOD      HERNANDO                34.83N 89.99W
12/08/2009                   DESOTO             MS   LAW ENFORCEMENT

            PINE TREE LOOP UNPASSABLE...BARRICADES BEING SET UP

&&

DSV
Local storm report, Dec 8, 4:17 PM CST, 2 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
417 PM CST TUE DEC 08 2009

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

0354 PM     FLASH FLOOD      HERNANDO                34.83N 89.99W
12/08/2009                   DESOTO             MS   LAW ENFORCEMENT

            PINE TREE LOOP UNPASSABLE...BARRICADES BEING SET UP

0414 PM     FLASH FLOOD      BOLIVAR                 35.26N 89.00W
12/08/2009                   HARDEMAN           TN   LAW ENFORCEMENT

            VERY HIGH WATER ON HWY 18N NEAR THE HATCHIE RIVER...AND
            HWY 125S NEAR HANNIS RD. BOTH OF THESE LOCATIONS ARE
            QUICKLY BECOMING IMPASSABLE.

&&

DSV
Local storm report, Dec 8, 4:29 PM CST, 1 hour 50 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
429 PM CST TUE DEC 08 2009

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

0354 PM     FLASH FLOOD      HERNANDO                34.83N 89.99W
12/08/2009                   DESOTO             MS   LAW ENFORCEMENT

            PINE TREE LOOP UNPASSABLE...BARRICADES BEING SET UP

0414 PM     FLASH FLOOD      BOLIVAR                 35.26N 89.00W
12/08/2009                   HARDEMAN           TN   LAW ENFORCEMENT

            VERY HIGH WATER ON HWY 18N NEAR THE HATCHIE RIVER...AND
            HWY 125S NEAR HANNIS RD. BOTH OF THESE LOCATIONS ARE
            QUICKLY BECOMING IMPASSABLE.

0423 PM     FLASH FLOOD      6 NE GERMANTOWN         35.15N 89.72W
12/08/2009                   SHELBY             TN   NWS EMPLOYEE

            WATER OVERFLOWING FROM COULEES AND DITCHES ONTO THE
            ROADWAY AT THESE LOCATIONS...WALNUT GROVE AND ROCK
            CREEK...HUMPHREYS AND HOUSTON LEVEE...AND SEVERAL
            LOCATIONS ON MACON ROAD...EAST OF PISGAH. PASSAGE THROUGH
            THESE AREAS BECOMING VERY DANGEROUS.

&&

DSV
Local storm report, Dec 8, 5:01 PM CST, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MEMPHIS TN
501 PM CST TUE DEC 08 2009

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

0218 PM     FLASH FLOOD      HENDERSON               35.44N 88.65W
12/08/2009                   CHESTER            TN   TRAINED SPOTTER

            LARGE AMOUNTS OF STREET FLOODING AND POOLING OF WATER ON
            ROADWAYS IN HENDERSON

0354 PM     FLASH FLOOD      HERNANDO                34.83N 89.99W
12/08/2009                   DESOTO             MS   LAW ENFORCEMENT

            PINE TREE LOOP UNPASSABLE...BARRICADES BEING SET UP

0414 PM     FLASH FLOOD      BOLIVAR                 35.26N 89.00W
12/08/2009                   HARDEMAN           TN   LAW ENFORCEMENT

            VERY HIGH WATER ON HWY 18N NEAR THE HATCHIE RIVER...AND
            HWY 125S NEAR HANNIS RD. BOTH OF THESE LOCATIONS ARE
            QUICKLY BECOMING IMPASSABLE.

0423 PM     FLASH FLOOD      6 NE GERMANTOWN         35.15N 89.72W
12/08/2009                   SHELBY             TN   NWS EMPLOYEE

            WATER OVERFLOWING FROM COULEES AND DITCHES ONTO THE
            ROADWAY AT THESE LOCATIONS...WALNUT GROVE AND ROCK
            CREEK...HUMPHREYS AND HOUSTON LEVEE...AND SEVERAL
            LOCATIONS ON MACON ROAD...EAST OF PISGAH. PASSAGE THROUGH
            THESE AREAS BECOMING VERY DANGEROUS.

0444 PM     FLASH FLOOD      5 WNW ARLINGTON         35.31N 89.75W
12/08/2009                   SHELBY             TN   TRAINED SPOTTER

            HEAVY RUNOFF OF WATER ON BRUNSWICK RD...BETWEEN THE
            CITIES OF MILLINGTON AND ARLINGTON

&&

DSV
Local storm report, Dec 8, 5:13 PM CST, 1 hour 6 minutes before
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Local storm report, Dec 8, 5:45 PM CST, 34 minutes before
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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 8, 6:31 PM CSTSevere Thunderstorm WarningMEGBenton, Lafayette, Marshall, Union18 min
Dec 8, 8:39 PM CSTRiver Flood WarningMEGQuitman45 hr
Dec 8, 8:39 PM CSTRiver Flood WarningMEGQuitman37 hr
Dec 8, 10:51 PM CSTSevere Thunderstorm WarningMEGChickasaw, Monroe39 min
Dec 8, 7:17 PM CSTRiver Flood WarningMEGMadison4 days
Dec 8, 7:28 PM CSTFlash Flood WarningMEGDecatur3 hr
Dec 8, 8:01 PM CSTRiver Flood WarningMEGCrockett, Dyer, Lauderdale6 days
Dec 8, 8:01 PM CSTRiver Flood WarningMEGFayette, Shelby12 hr
Dec 9, 5:53 AM CSTWind AdvisoryMEGCarroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more6 hr

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.