Alert archive / Mississippi / Winter Storm Watches in 2011

Winter Storm Watch 2, NWS Memphis, TN

February 7, 201119 counties in Mississippi; 4 counties in Tennessee; 12 counties in Arkansas

NWS Memphis, TN issued this winter storm watch at Feb 7, 2011, 3:29 PM CST for 19 counties in Mississippi; 4 counties in Tennessee; 12 counties in Arkansas. It took effect at Feb 9, 2011, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 7, 2011, 3:29 PM CST (21:29 UTC)
In effect from: Feb 9, 2011, 6:00 AM CST
Expired: Feb 8, 2011, 4:31 PM CST
In force
Issued by: NWS Memphis, TN

All 35 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Fayette County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 51 km from the middle of the area, began a volume at 21:26 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

Little Rock, AR (KLZK), launched 12:00Z, 9.5 hours before the alert went out and 8 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: 507 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 115 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 Memphis, TN wrote its last area forecast discussion before this winter storm watch went out at Feb 7, 12:04 PM CST, 3 hours 25 minutes earlier.

Area forecast discussion, Feb 7, 12:04 PM CST, 3 hours 25 minutes before

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Hazardous weather outlook, Feb 7, 9:36 AM CST, 5 hours 53 minutes before

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In the hours before

Local storm report, Feb 7, 1:01 PM CST, 2 hours 28 minutes before

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Local storm report, Feb 7, 1:02 PM CST, 2 hours 27 minutes before

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Local storm report, Feb 7, 1:20 PM CST, 2 hours 9 minutes before

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Local storm report, Feb 7, 1:32 PM CST, 1 hour 57 minutes before

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Local storm report, Feb 7, 1:44 PM CST, 1 hour 45 minutes before

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Local storm report, Feb 7, 3:05 PM CST, 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 7, 9:06 AM CST	Winter Storm Warning	MEG	Carroll, Crockett, Dyer, Gibson, Haywood, Henry and 5 more	6 hr

Nearby

Winter Storm Watches in Mississippi, 2011 Winter Storm Watches in Arkansas, 2011 Winter Storm Watches in Tennessee, 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; radar from the NEXRAD Level II archive.