Alert archive / Arkansas / Special Weather Statements in 2012

Special Weather Statement, NWS Memphis, TN

April 15, 2012Lawrence County, Arkansas

NWS Memphis, TN issued this special weather statement at Apr 15, 2012, 8:28 PM CDT for Lawrence County, Arkansas. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 15, 2012, 8:28 PM CDT (01:28 UTC)
Expired: Apr 15, 2012, 9:15 PM CDT
In force: 47 min
Issued by: NWS Memphis, TN

County Lawrence County, AR

The radar

The Memphis radar (KNQA), 120 km from the middle of the area, began a volume at 01:29 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 00:00Z, 1.5 hours before the alert went out and 151 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: 1081 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1176 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 389 m²/s²
0-3 km storm-relative helicity: 497 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 12.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 15, 6:45 PM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, Apr 15, 6:45 PM CDT, 1 hour 43 minutes before

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Hazardous weather outlook, Apr 15, 6:28 PM CDT, 2 hours before

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In the hours before

Special weather statement, Apr 15, 8:28 PM CDT, 0 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
Apr 16, 3:08 AM CDT	Special Weather Statement	MEG	Tippah, Union	37 min
Apr 16, 1:08 AM CDT	Special Weather Statement	MEG	Haywood, Madison	37 min
Apr 16, 1:30 AM CDT	Special Weather Statement	MEG	Fayette, Hardeman	45 min
Apr 16, 3:13 AM CDT	Special Weather Statement	MEG	McNairy	47 min
Apr 15, 8:59 PM CDT	Special Weather Statement	MEG	Craighead	31 min
Apr 15, 9:20 PM CDT	Special Weather Statement	MEG	Clay	25 min
Apr 15, 9:31 PM CDT	Special Weather Statement	MEG	Craighead, Cross, Poinsett	29 min
Apr 15, 9:45 PM CDT	Special Weather Statement	MEG	Clay, Greene	30 min
Apr 15, 9:59 PM CDT	Special Weather Statement	MEG	Cross, Mississippi	31 min

Nearby

Special Weather Statements in Arkansas, 2012 Every special weather statement in 2012

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.