Alert archive / Louisiana / Winter Storm Watches in 2011

Winter Storm Watch 2, NWS New Orleans, LA

February 2, 20118 parishes in Louisiana; 5 counties in Mississippi

NWS New Orleans, LA issued this winter storm watch at Feb 2, 2011, 4:49 PM CST for 8 parishes in Louisiana; 5 counties in Mississippi. It took effect at Feb 3, 2011, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 2, 2011, 4:49 PM CST (22:49 UTC)
In effect from: Feb 3, 2011, 6:00 AM CST
Expired: Feb 3, 2011, 3:53 AM CST
In force
Issued by: NWS New Orleans, LA

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.8 hours before the alert went out and 180 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 101 kt
0-1 km storm-relative helicity: -263 m²/s²
0-3 km storm-relative helicity: -269 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 winter storm watch 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 winter storm watch went out at Feb 2, 4:19 PM CST, 30 minutes earlier.

Area forecast discussion, Feb 2, 4:19 PM CST, 30 minutes before

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Hazardous weather outlook, Feb 2, 1:07 PM CST, 3 hours 42 minutes before

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In the hours before

Special weather statement, Feb 2, 12:00 PM CST, 4 hours 49 minutes before

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Special weather statement, Feb 2, 4:15 PM CST, 34 minutes before

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Special weather statement, Feb 2, 4:45 PM CST, 4 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
Feb 2, 5:58 AM CST	Freeze Warning	LIX	Saint John the Baptist	2 hr
Feb 2, 4:49 PM CST	Winter Weather Advisory	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 6 more	17 hr

Nearby

Winter Storm Watches in Louisiana, 2011 Winter Storm Watches in Mississippi, 2011 Every winter storm watch in 2011

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.