Alert archive / Missouri / Heat Advisories in 2011

Heat Advisory 5, NWS Springfield, MO

August 23, 201120 counties in Missouri; Bourbon County, Cherokee County, Crawford County, Kansas

NWS Springfield, MO issued this heat advisory at Aug 23, 2011, 4:15 AM CDT for 20 counties in Missouri; Bourbon County, Cherokee County, Crawford County, Kansas. It took effect at Aug 23, 2011, 12:00 PM CDT. It was in force for 31 hr.

The area

The counties it named.

The facts

Issued: Aug 23, 2011, 4:15 AM CDT (09:15 UTC)
In effect from: Aug 23, 2011, 12:00 PM CDT
Expired: Aug 24, 2011, 7:00 PM CDT
In force: 31 hr
Issued by: NWS Springfield, MO

All 23 counties

Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Morgan County, MO, Newton County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Springfield radar (KSGF), 51 km from the middle of the area, began a volume at 09:16 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

Springfield, MO (KSGF), launched 00:00Z, 9.3 hours before the alert went out and 90 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: 1980 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1449 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

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 Springfield, MO wrote its last area forecast discussion before this heat advisory went out at Aug 23, 3:50 AM CDT, 25 minutes earlier.

Area forecast discussion, Aug 23, 3:50 AM CDT, 25 minutes before

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Hazardous weather outlook, Aug 22, 10:43 PM CDT, 5 hours 32 minutes before

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The office that day

Everything else NWS Springfield, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 7:54 PM CDT	Special Weather Statement	SGF	Howell	66 min
Aug 22, 8:31 PM CDT	Special Weather Statement	SGF	Laclede	59 min
Aug 22, 9:06 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Phelps, Pulaski, Texas	54 min
Aug 22, 9:50 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Phelps	55 min
Aug 23, 9:08 AM CDT	Special Weather Statement	SGF	Dade	52 min
Aug 23, 10:13 AM CDT	Special Weather Statement	SGF	Greene	32 min

Nearby

Heat Advisories in Missouri, 2011 Heat Advisories in Kansas, 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.