Alert archive / Mississippi / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 69, NWS Jackson, MS

April 23, 20104 counties in Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 23, 2010, 2:09 PM CDT for 4 counties in Mississippi. It was in force for 66 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
Apr 23, 2010, 2:09 PM CDT (19:09 UTC)
Expired
Apr 23, 2010, 3:15 PM CDT
In force
66 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon

Counties Leake County, MS, Madison County, MS, Rankin County, MS, Scott County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 34 km from the middle of the area, began a volume at 19:12 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
Apr 23, 12:51 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.2 hours before the alert went out and 37 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, Jackson, MS at 12:00Z on 2010-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 37 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jackson, MS at 12:00Z on 2010-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.19395878Sfc1 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
37 J/kg
Mixed-layer CIN
-425 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
154 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 12:10 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Apr 23, 12:10 PM CDT, 1 hour 59 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE JACKSON MS
1210 PM CDT FRI APR 23 2010

.UPDATE...
UPDATED THE HOURLY VALUES TO REFLECT CURRENT CONDITIONS. SHOWERS AND
THUNDERSTORMS WERE SLOWLY SPREADING ACROSS NORTHEAST LOUISIANA AND
FAR WEST MISSISSIPPI...SO RAIN CHANCES WERE GOOD. WILL DO ANOTHER UPDATE
TO REMOVE MORNING WORDING...RAISE HIGHS IN THE WEST AND LOWER HIGHS IN
THE NORTHEAST. GUSTY SOUTHERLY WINDS WERE HELPING TO BRING IN WARM
AND MOIST AIR. WARM ADVECTION WAS NOT AS GOOD IN THE EAST/NORTHEAST.
EVERYTHING ELSE WAS GOOD.

&&

.AVIATION...
LOW CLOUDS AND STORMS WILL MOVE INTO THE AREA THIS AFTERNOON AND
IMPACT MOST LOCATIONS. CEILINGS WILL REMAIN AROUND 1500 TO 2500 FEET
WITH LOWER CLOUDS LIKELY WITH THUNDERSTORMS. WINDS WILL ALSO REMAIN
FROM 10 TO 15KTS WITH OCCASIONAL HIGHER GUSTS. WILL KEEP WORSENING
CONDITIONS IN THE TEMPO GROUPS. THUNDERSTORMS WILL IMPACT TVR AROUND
18Z...GLH/JAN 19Z...GWO 20Z...GTR/MEI AROUND 22Z. VERY HEAVY
RAIN...GUSTY WINDS...SMALL HAIL AND PLENTY OF LIGHTNING WILL BE
LIKELY THROUGH 00Z. THUNDERSTORMS WILL BE SCATTERED IN NATURE. AFTER
00Z...WILL MAINTAIN THUNDERSTORMS FOR GLH/JAN/GWO...WHERE THERE MAY
BE MORE ACTIVITY THROUGH 6Z. LOW CLOUDS WILL LIKELY CONTINUE THROUGH
MUCH OF THE PERIOD.

&&

.PRELIMINARY POINT TEMPS/POPS...
JACKSON       77  70  78  55 /  58  76  99  22
MERIDIAN      80  67  80  57 /  41  77  97  41
VICKSBURG     79  69  78  54 /  66  76  99  14
HATTIESBURG   81  70  79  59 /  47  49  90  39
NATCHEZ       79  70  77  56 /  60  61  97  13
GREENVILLE    76  69  77  55 /  66  80 100  19
GREENWOOD     77  72  77  57 /  61  78 100  22

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...NONE.
LA...NONE.
AR...NONE.
&&
Hazardous weather outlook, Apr 23, 5:30 AM CDT, 8 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
530 AM CDT FRI APR 23 2010

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
241030-
ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND-
MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR-
SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES-
CHOCTAW-OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON-
NOXUBEE-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER-
WARREN-HINDS-RANKIN-SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH-
SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN-
LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST-
530 AM CDT FRI APR 23 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI...
NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS.

.DAY ONE...TODAY AND TONIGHT

A SIGNIFICANT SEVERE WEATHER OUTBREAK IS EXPECTED FROM THIS AFTERNOON
THROUGH SATURDAY. TORNADOES...SOME STRONG AND LONG TRACK...ALONG WITH
HAIL TO THE SIZE OF GOLF BALLS OR LARGER...AND DAMAGING WINDS WILL BE
POSSIBLE DURING THIS SEVERE WEATHER OUTBREAK.

SCATTERED SEVERE THUNDERSTORMS ARE EXPECTED BETWEEN 1 AND 9 PM TODAY.
ALL AREAS WILL HAVE THE POTENTIAL FOR SEVERE STORMS DURING THIS TIME.
HOWEVER...AREAS ROUGHLY ALONG AND WEST OF I-55 HAVE THE HIGHEST
SEVERE WEATHER POTENTIAL. SCATTERED SUPERCELL THUNDERSTORMS ARE
EXPECTED TODAY. ANY OF THESE STORMS WILL BE CAPABLE OF PRODUCING
QUARTER TO GOLF BALL SIZED HAIL AND TORNADOES. A COUPLE STRONG
TORNADOES APPEAR POSSIBLE WITH THE MOST INTENSE SUPERCELLS. DAMAGING
WINDS MAY ALSO OCCUR FROM INDIVIDUAL STORMS AS WELL.

LATER TONIGHT...MAINLY BETWEEN 10 PM AND 4 AM...ACTIVITY IS EXPECTED
TO DECREASE IN STRENGTH OR MOVE OUT OF THE AREA FOR A BRIEF PERIOD
OF TIME. AFTER 4 AM...THE SECOND AND MORE SUBSTANTIAL EVENT IS
EXPECTED TO DEVELOP.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

EARLY SATURDAY MORNING INTO THE AFTERNOON HOURS...NUMEROUS SEVERE
STORMS ARE EXPECTED ACROSS THE FORECAST AREA. SUPERCELL STORMS ARE
AGAIN EXPECTED WITH SOME OF THESE CAPABLE OF PRODUCING STRONG LONG
TRACKED TORNADOES. HAIL TO GOLF BALL SIZE OR LARGE WILL BE POSSIBLE
ALONG WITH DAMAGING WINDS. THE SUPERCELLS MAY TRANSITION INTO A FEW
BROKEN BANDS OF STORMS WITH BOWING LINE SEGMENTS DEVELOPING. THIS
LOOKS TO BE POSSIBLE LATER IN THE EVENT AND WILL POSE PRIMARILY A
DAMAGING WIND AND HAIL THREAT. THE MAIN TIME FRAME FOR SEVERE STORMS
LOOKS TO BE BETWEEN 6 AM AND 4 PM BEFORE ACTIVITY PUSHES EAST.

.SPOTTER CALL TO ACTION STATEMENT...
THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS WILL BE NEEDED THIS AFTERNOON INTO SATURDAY.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

CME

In the hours before

Special weather statement, Apr 23, 1:06 PM CDT, 1 hour 3 minutes before
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Special weather statement, Apr 23, 1:08 PM CDT, 1 hour 1 minute before
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Special weather statement, Apr 23, 1:31 PM CDT, 38 minutes before
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Special weather statement, Apr 23, 1:52 PM CDT, 17 minutes before
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Special weather statement, Apr 23, 1:52 PM CDT, 17 minutes before
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Special weather statement, Apr 23, 2:02 PM CDT, 7 minutes before
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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 12:31 PM CDTSevere Thunderstorm WarningJANIssaquena, Warren44 min
Apr 23, 1:11 PM CDTSevere Thunderstorm WarningJANHinds, Issaquena, Madison, Sharkey, Warren, Yazoo50 min
Apr 23, 3:11 PM CDTSevere Thunderstorm WarningJANCovington, Jasper, Jefferson Davis, Jones, Simpson, Smith64 min
Apr 23, 3:13 PM CDTTornado WarningJANCarroll, Holmes, Humphreys, Leflore, Sunflower, Washington62 min
Apr 23, 3:16 PM CDTSevere Thunderstorm WarningJANAttala, Holmes, Leake, Madison59 min
Apr 23, 3:53 PM CDTTornado WarningJANHolmes, Humphreys22 min
Apr 23, 3:58 PM CDTSevere Thunderstorm WarningJANAttala, Choctaw, Oktibbeha, Winston46 min
Apr 23, 4:04 PM CDTSevere Thunderstorm WarningJANClarke, Jasper, Lauderdale, Newton56 min
Apr 23, 4:08 PM CDTSevere Thunderstorm WarningJANAttala, Carroll, Montgomery, Webster67 min
Apr 23, 4:12 PM CDTSevere Thunderstorm WarningJANKemper, Leake, Neshoba, Noxubee, Winston63 min
Apr 23, 4:13 PM CDTTornado WarningJANAttala, Carroll, Holmes, Leflore62 min
Apr 23, 4:42 PM CDTSevere Thunderstorm WarningJANChoctaw, Webster48 min
Apr 23, 4:56 PM CDTSevere Thunderstorm WarningJANLowndes, Noxubee, Oktibbeha, Winston49 min
Apr 23, 5:01 PM CDTTornado WarningJANCarroll, Choctaw, Montgomery, Oktibbeha, Webster40 min
Apr 23, 5:39 PM CDTSevere Thunderstorm WarningJANLowndes, Noxubee66 min
Apr 23, 5:44 PM CDTSevere Thunderstorm WarningJANHolmes, Humphreys, Yazoo50 min
Apr 23, 5:49 PM CDTTornado WarningJANHolmes, Humphreys, Yazoo45 min
Apr 23, 12:08 PM CDTSevere Thunderstorm WarningJANMadison, Tensas52 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2010Every severe thunderstorm 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.