Alert archive / Mississippi / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 98, NWS New Orleans, LA

June 5, 2010Harrison County, Jackson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 5, 2010, 4:58 PM CDT for Harrison County, Jackson County, Mississippi. It was in force for 62 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: Jun 5, 2010, 4:58 PM CDT (21:58 UTC)
Expired: Jun 5, 2010, 6:00 PM CDT
In force: 62 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Harrison County, MS, Jackson County, MS

The radar

The Mobile radar (KMOB), 64 km from the middle of the area, began a volume at 22:02 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.0 hours before the alert went out and 84 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: 1235 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 705 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

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 New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 5, 3:26 PM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, Jun 5, 3:26 PM CDT, 1 hour 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
326 PM CDT SAT JUN 5 2010

.SYNOPSIS...
AN UPPER LOW MOVING ACROSS THE AREA TODAY WILL BECOME SHEARED OUT
AND ABSORBED INTO JET THIS EVENING. SHOWERS AND THUNDERSTORMS WILL
DIMINISH AS THIS OCCURS. A WEAK TROUGH LEFT OVER THE AREA SUN WILL
PROVIDE A FOCUS FOR CONTINUED DAYTIME SHOWERS AND THUNDERSTORMS. A
RIDGE WILL BUILD OVER THE REGION ON MON AND REMAIN THROUGH THE
WEEK BRINGING INCREASING TEMPERATURES.

&&

.SHORT TERM...THE UPPER LOW OVER THE AREA TODAY WILL BECOME
ABSORBED BY A TROUGH IN THE MID LATITUDE JET. MODELS CONTINUE TO
REMAIN IN GOOD AGREEMENT WITH THE SPEED OF DEPARTURE AND A WEAK
TROUGH LINGERING THROUGH THE AREA FOR SUN. THIS TROUGH WILL
PROVIDE A FOCUS FOR SHOWERS AND THUNDERSTORMS DURING THE AFTERNOON
SUN ACROSS THE CWA. THESE ARE NOT EXPECTED TO AS WIDESPREAD AS THE
PREVIOUS DAYS. THIS TROUGH IS SHOULD DIMINISH SAT NIGHT AS A RIDGE
NOSES INTO THE AREA. BY MON MODELS INDICATE THE RIDGE DOMINATING
AND BRINGING WARMER TEMPS. HIGHER TEMPS IN SOUTHERLY FLOW WILL
CAUSE FOR AN ELEVATED HEAT INDEX. MON SHOULD SEE A HEAT INDEX OVER
100 DEGREES F. BFG

.LONG TERM...MODELS ARE IN FAIR AGREEMENT THROUGH THE MAJORITY OF
THE WEEK SHOWING A DOMINATING RIDGE WHICH WILL YIELD HIGHER THAN
NORMAL TEMP IN CONJUNCTION WITH ELEVATED DEWPOINT TEMPS. THE END OF
THE WEEK LOOKS TO BRING A REPRIEVE WITH MORE SHOWERS AND
THUNDERSTORMS ARRIVING. ANY CONVECTION THAT OCCURS UNDER THE RIDGE
WILL BE A RESULT OF THE SEA BREEZE.

&&

.AVIATION...
PATCHY AREAS OF MVFR CEILINGS CONTINUE THIS AFTERNOON
WITH NUMEROUS THUNDERSTORMS OVER THE AREA. CONVECTION PEAKING IN
COVERAGE THIS AFTERNOON SHOULD BECOME MORE ISOLATED THIS EVENING
THEN TAPER OFF. PATCHY FOG OVERNIGHT WILL BRING SPOTTY MVFR
CONDITIONS THROUGH THE EARLY MORNING HOURS.

&&

.MARINE...
THE PERSISTENT UPPER LEVEL TROUGH CENTERED OVER LOUISIANA
AND MISSISSIPPI HAS TRIGGERED ANOTHER ACTIVE AFTERNOON WITH NUMEROUS
THUNDERSTORMS OVER THE WATER. CONVECTIVE ACTIVITY SHOULD DISSIPATE
THIS EVENING WITH MOSTLY QUIET CONDITIONS TONIGHT. SUNDAY SHOULD SEE
MORE SCATTERED SHRA AND TSRA BUT OVERALL COVERAGE SHOULD BE LIGHTER
THAN TODAY. AS WE HEAD INTO NEXT WEEK THINGS WILL REALLY BEGIN TO
QUIET DOWN AS AN UPPER LEVEL RIDGE BUILDS OVER THE REGION LEAVING
THE COASTAL WATERS RATHER RAIN FREE. AS FOR WINDS IT SHOULD BE
ANOTHER BREEZY DAY TODAY. MODERATE ONSHORE FLOW WILL CONTINUE AND
SMALL CRAFT SHOULD EXERCISE CAUTION BUT OVERALL WINDS WILL BE
LIGHTER THAN YESTERDAY. SEAS WILL CONTINUE TO REMAIN BETWEEN 2-4 FT
TODAY AND LIKELY DROP TO 2-3 FT TOMORROW AND MORE AROUND 2 FEET FOR
MUCH OF NEXT WEEK. CAB/JER

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  72  93  77  96 /  20  40  10  20
BTR  72  95  75  96 /  30  40  10  20
ASD  76  93  77  95 /  30  50  10  20
MSY  74  92  75  94 /  30  50  10  20
GPT  77  91  77  94 /  30  50  10  20
PQL  75  91  76  94 /  30  50  10  20

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...NONE.
GM...NONE.
MS...NONE.
GM...NONE.
&&

Hazardous weather outlook, Jun 5, 4:47 PM CDT, 11 minutes before

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In the hours before

Special weather statement, Jun 5, 3:08 PM CDT, 1 hour 50 minutes before

LAZ057>059-052045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
308 PM CDT SAT JUN 5 2010

...STRONG THUNDERSTORM MOVING NORTHEAST AFFECTING ST. JOHN THE
BAPTIST PARISH...ST. JAMES PARISH...LAFOURCHE PARISH...

AT 302 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 7 MILES NORTH OF THIBODAUX...OR ABOUT 13 MILES
SOUTH OF LUTCHER...MOVING NORTHEAST AT 20 MPH.

THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...LUTCHER...
GRAMERCY...GARYVILLE AND EDGARD

THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING...PEA TO
DIME SIZE HAIL...AND WIND GUSTS TO NEAR 50 MPH...WHICH COULD DOWN
TREE LIMBS AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A
SAFE HOME OR BUILDING UNTIL THIS STORM HAS PASSED.

Special weather statement, Jun 5, 3:32 PM CDT, 1 hour 26 minutes before

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Local storm report, Jun 5, 4:13 PM CDT, 45 minutes before

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Special weather statement, Jun 5, 4:19 PM CDT, 39 minutes before

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Special weather statement, Jun 5, 4:31 PM CDT, 27 minutes before

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Special weather statement, Jun 5, 4:33 PM CDT, 25 minutes before

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The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 1:37 PM CDT	Special Marine Warning	LIX		53 min
Jun 5, 1:55 PM CDT	Special Marine Warning	LIX		35 min
Jun 5, 2:06 PM CDT	Special Marine Warning	LIX		24 min
Jun 5, 2:13 PM CDT	Tornado Warning	LIX	Livingston, Saint Helena, Tangipahoa	21 min
Jun 5, 2:18 PM CDT	Special Marine Warning	LIX		27 min
Jun 5, 2:20 PM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	25 min
Jun 5, 2:30 PM CDT	Special Marine Warning	LIX		30 min
Jun 5, 2:31 PM CDT	Special Marine Warning	LIX		44 min
Jun 5, 2:44 PM CDT	Tornado Warning	LIX	Plaquemines	31 min
Jun 5, 2:52 PM CDT	Severe Thunderstorm Warning	LIX	Saint John the Baptist	23 min
Jun 5, 3:01 PM CDT	Special Marine Warning	LIX		59 min
Jun 5, 3:02 PM CDT	Special Marine Warning	LIX		43 min
Jun 5, 3:02 PM CDT	Special Marine Warning	LIX		28 min
Jun 5, 3:21 PM CDT	Special Marine Warning	LIX		24 min
Jun 5, 3:27 PM CDT	Flash Flood Warning	LIX	Saint Tammany	2 hr
Jun 5, 3:43 PM CDT	Special Marine Warning	LIX		47 min
Jun 5, 4:46 PM CDT	Special Marine Warning	LIX		29 min
Jun 5, 5:03 PM CDT	Special Marine Warning	LIX		87 min
Jun 5, 5:47 PM CDT	Special Marine Warning	LIX		58 min
Jun 5, 6:33 PM CDT	Special Marine Warning	LIX		57 min
Jun 5, 2:55 PM CDT	Severe Thunderstorm Warning	LIX	Pearl River	35 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2010 Every 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.