Alert archive / Illinois / Heat Advisories in 2011

Heat Advisory 2, NWS Paducah, KY

July 3, 20119 counties in Kentucky; 12 counties in Illinois; 11 counties in Missouri

NWS Paducah, KY issued this heat advisory at Jul 3, 2011, 10:51 AM CDT for 9 counties in Kentucky; 12 counties in Illinois; 11 counties in Missouri. It took effect at Jul 3, 2011, 12:00 PM CDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jul 3, 2011, 10:51 AM CDT (15:51 UTC)
In effect from: Jul 3, 2011, 12:00 PM CDT
Expired: Jul 3, 2011, 5:27 PM CDT
In force: 5 hr
Issued by: NWS Paducah, KY

All 32 counties

Alexander County, IL, Franklin County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Marshall County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 45 km from the middle of the area, began a volume at 15:55 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, 3.9 hours before the alert went out and 265 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: 1886 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 941 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: -4 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 Paducah, KY wrote its last area forecast discussion before this heat advisory went out at Jul 3, 6:28 AM CDT, 4 hours 23 minutes earlier.

Area forecast discussion, Jul 3, 6:28 AM CDT, 4 hours 23 minutes before

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Hazardous weather outlook, Jul 3, 5:25 AM CDT, 5 hours 26 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 1:38 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson	37 min
Jul 3, 1:45 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	34 min
Jul 3, 2:13 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	28 min
Jul 3, 2:23 PM CDT	Flash Flood Warning	PAH	Jefferson, Wayne	2 hr
Jul 3, 2:52 PM CDT	Severe Thunderstorm Warning	PAH	Hamilton	23 min
Jul 3, 3:11 PM CDT	Severe Thunderstorm Warning	PAH	White	34 min

Nearby

Heat Advisories in Illinois, 2011 Heat Advisories in Missouri, 2011 Heat Advisories in Kentucky, 2011 Every heat advisory 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.