Alert archive / Mississippi / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 178, NWS New Orleans, LA

October 15, 2009Pearl River County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Oct 15, 2009, 6:05 PM CDT for Pearl River County, Mississippi. It was in force for 28 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: Oct 15, 2009, 6:05 PM CDT (23:05 UTC)
Expired: Oct 15, 2009, 6:33 PM CDT
In force: 28 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

County Pearl River County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.1 hours before the alert went out and 179 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: 1438 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.1

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 New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 15, 4:45 PM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, Oct 15, 4:45 PM CDT, 1 hour 20 minutes before

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Hazardous weather outlook, Oct 15, 10:40 AM CDT, 7 hours 25 minutes before

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In the hours before

Special weather statement, Oct 15, 5:32 PM CDT, 33 minutes before

MSZ077-152330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
532 PM CDT THU OCT 15 2009

...STRONG THUNDERSTORM MOVING SOUTHEAST AFFECTING PEARL RIVER
COUNTY...

AT 530 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 16 MILES SOUTHEAST OF COLUMBIA...OR ABOUT 18
MILES NORTHWEST OF POPLARVILLE...MOVING SOUTHEAST AT 20 MPH.

THE STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND...POPLARVILLE

THE PRIMARY THREATS FROM THIS STORM ARE FREQUENT LIGHTNING...SMALL
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.

95/DM

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 14, 10:07 PM CDT	Dense Fog Advisory	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Helena, Washington and 2 more	10 hr
Oct 15, 4:20 PM CDT	Small Craft Advisory	LIX		3 days
Oct 15, 3:28 PM CDT	Severe Thunderstorm Warning	LIX	Walthall	47 min
Oct 15, 4:55 PM CDT	Severe Thunderstorm Warning	LIX	Walthall	31 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2009 Every 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.