Alert archive / Mississippi / Winter Storm Watches in 2015

Winter Storm Watch 2, NWS Memphis, TN

February 18, 201522 counties in Mississippi; 21 counties in Tennessee; 12 counties in Arkansas

NWS Memphis, TN issued this winter storm watch at Feb 18, 2015, 3:36 PM CST for 22 counties in Mississippi; 21 counties in Tennessee; 12 counties in Arkansas. It took effect at Feb 20, 2015, 3:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 18, 2015, 3:36 PM CST (21:36 UTC)
In effect from: Feb 20, 2015, 3:00 AM CST
Expired: Feb 19, 2015, 3:09 PM CST
In force
Issued by: NWS Memphis, TN

All 55 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, Alcorn County, MS, 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, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 42 km from the middle of the area, began a volume at 21:39 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

Nashville Metro, TN (KBNA), launched 12:00Z, 9.6 hours before the alert went out and 280 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: 491 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 177 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 18, 11:16 AM CST, 4 hours 20 minutes earlier.

Area forecast discussion, Feb 18, 11:16 AM CST, 4 hours 20 minutes before

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Hazardous weather outlook, Feb 18, 9:48 AM CST, 5 hours 48 minutes before

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In the hours before

Special weather statement, Feb 18, 9:40 AM CST, 5 hours 56 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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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 18, 3:46 AM CST	Wind Chill Advisory	MEG	Alcorn, Benton, Chickasaw, DeSoto, Itawamba, Lafayette and 11 more	32 hr

Nearby

Winter Storm Watches in Mississippi, 2015 Winter Storm Watches in Tennessee, 2015 Winter Storm Watches in Arkansas, 2015 Every winter storm watch in 2015

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.