Alert archive / Oklahoma / Heat Advisories in 2012

Heat Advisory 2, NWS Norman, OK

July 20, 201248 counties in Oklahoma; 8 counties in Texas

NWS Norman, OK issued this heat advisory at Jul 20, 2012, 5:09 AM CDT for 48 counties in Oklahoma; 8 counties in Texas. It took effect at Jul 20, 2012, 7:00 AM CDT. It was in force for 4 days.

The area

The counties it named.

The facts

Issued: Jul 20, 2012, 5:09 AM CDT (10:09 UTC)
In effect from: Jul 20, 2012, 7:00 AM CDT
Expired: Jul 24, 2012, 4:07 AM CDT
In force: 4 days
Issued by: NWS Norman, OK

All 56 counties

Alfalfa County, OK, Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 10:11 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

Norman, OK (KOUN), launched 00:00Z, 10.2 hours before the alert went out and 67 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: 3363 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 73 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 heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this heat advisory went out at Jul 20, 4:20 AM CDT, 49 minutes earlier.

Area forecast discussion, Jul 20, 4:20 AM CDT, 49 minutes before

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Hazardous weather outlook, Jul 19, 10:51 PM CDT, 6 hours 18 minutes before

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<body>
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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 7:12 PM CDT	Special Weather Statement	OUN	Major	48 min
Jul 19, 7:15 PM CDT	Special Weather Statement	OUN	Garfield	45 min
Jul 20, 3:11 PM CDT	Special Weather Statement	OUN	Pontotoc	49 min
Jul 20, 3:44 PM CDT	Special Weather Statement	OUN	Johnston, Murray, Pontotoc	61 min
Jul 20, 3:48 PM CDT	Severe Thunderstorm Warning	OUN	Johnston, Murray, Pontotoc	42 min
Jul 20, 4:28 PM CDT	Special Weather Statement	OUN	Murray	47 min
Jul 20, 4:55 PM CDT	Special Weather Statement	OUN	Beckham	35 min
Jul 20, 4:56 PM CDT	Special Weather Statement	OUN	Washita	34 min
Jul 20, 5:31 PM CDT	Special Weather Statement	OUN	Beckham	29 min
Jul 20, 4:47 PM CDT	Special Weather Statement	OUN	Archer	28 min
Jul 20, 4:59 PM CDT	Special Weather Statement	OUN	Baylor	31 min

Nearby

Heat Advisories in Oklahoma, 2012 Heat Advisories in Texas, 2012 Every heat advisory 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.