Alert archive / Arkansas / Excessive Heat Warnings in 2012

Excessive Heat Warning 1, NWS Memphis, TN

July 19, 20127 counties in Arkansas

NWS Memphis, TN issued this excessive heat warning at Jul 19, 2012, 3:15 AM CDT for 7 counties in Arkansas. It was in force for 16 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 19, 2012, 3:15 AM CDT (08:15 UTC)
Expired: Jul 19, 2012, 7:00 PM CDT
In force: 16 hr
Issued by: NWS Memphis, TN

Counties Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR

The radar

The Memphis radar (KNQA), 101 km from the middle of the area, began a volume at 08:17 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, 8.3 hours before the alert went out and 145 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: 3131 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1829 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 111 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 excessive heat warning 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 excessive heat warning went out at Jul 19, 3:08 AM CDT, 7 minutes earlier.

Area forecast discussion, Jul 19, 3:08 AM CDT, 7 minutes before

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Hazardous weather outlook, Jul 18, 10:45 PM CDT, 4 hours 30 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
Jul 19, 3:32 PM CDT	Special Weather Statement	MEG	Benton	28 min
Jul 19, 3:42 PM CDT	Special Weather Statement	MEG	Marshall	33 min
Jul 19, 4:23 PM CDT	Special Weather Statement	MEG	Marshall	37 min
Jul 19, 4:42 PM CDT	Special Weather Statement	MEG	Chickasaw	33 min
Jul 19, 4:43 PM CDT	Special Weather Statement	MEG	Monroe	32 min
Jul 19, 4:58 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Lee, Monroe, Pontotoc	32 min
Jul 19, 5:05 PM CDT	Special Weather Statement	MEG	Pontotoc, Union	25 min
Jul 19, 5:29 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Lee, Monroe, Pontotoc	46 min
Jul 19, 5:36 PM CDT	Flash Flood Warning	MEG	Chickasaw, Lee, Monroe, Pontotoc	3 hr
Jul 19, 6:29 PM CDT	Flash Flood Warning	MEG	Calhoun, Chickasaw, Pontotoc	3 hr
Jul 18, 7:18 PM CDT	Severe Thunderstorm Warning	MEG	Madison	42 min
Jul 18, 7:27 PM CDT	Severe Thunderstorm Warning	MEG	Carroll, Chester, Decatur, Henderson	24 min
Jul 19, 2:20 PM CDT	Special Weather Statement	MEG	Woodruff	40 min
Jul 19, 2:30 PM CDT	Severe Thunderstorm Warning	MEG	Cross, St. Francis	29 min
Jul 19, 3:15 PM CDT	Special Weather Statement	MEG	St. Francis	30 min
Jul 19, 3:35 PM CDT	Special Weather Statement	MEG	St. Francis	25 min
Jul 19, 4:56 PM CDT	Special Weather Statement	MEG	Clay	49 min
Jul 19, 5:26 PM CDT	Severe Thunderstorm Warning	MEG	Clay	49 min

Nearby

Excessive Heat Warnings in Arkansas, 2012 Every excessive heat warning 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.