Alert archive / Missouri / Heat Advisories in 2017

Heat Advisory 9, NWS Springfield, MO

August 20, 20175 counties in Missouri; Bourbon County, Cherokee County, Crawford County, Kansas

NWS Springfield, MO issued this heat advisory at Aug 20, 2017, 3:23 AM CDT for 5 counties in Missouri; Bourbon County, Cherokee County, Crawford County, Kansas. It took effect at Aug 20, 2017, 12:00 PM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Aug 20, 2017, 3:23 AM CDT (08:23 UTC)
In effect from: Aug 20, 2017, 12:00 PM CDT
Expired: Aug 20, 2017, 7:00 PM CDT
In force: 7 hr
Issued by: NWS Springfield, MO

Counties Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Barton County, MO, Jasper County, MO, McDonald County, MO, Newton County, MO, Vernon County, MO

The radar

The Springfield radar (KSGF), 101 km from the middle of the area, began a volume at 08:23 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

Topeka, KS (KFOE), launched 00:00Z, 8.4 hours before the alert went out and 210 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: 2234 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 1772 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.3

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 19, 11:31 PM CDT, 3 hours 52 minutes earlier.

Area forecast discussion, Aug 19, 11:31 PM CDT, 3 hours 52 minutes before

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Hazardous weather outlook, Aug 19, 8:07 PM CDT, 7 hours 16 minutes before

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In the hours before

Special weather statement, Aug 19, 10:25 PM CDT, 4 hours 58 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 19, 10:25 PM CDT	Special Weather Statement	SGF	Taney	50 min
Aug 20, 9:31 AM CDT	Severe Thunderstorm Warning	SGF	Dallas, Laclede, Webster	29 min
Aug 20, 9:58 AM CDT	Special Weather Statement	SGF	Webster, Wright	47 min
Aug 20, 11:13 AM CDT	Special Weather Statement	SGF	Texas	47 min
Aug 20, 11:37 AM CDT	Severe Thunderstorm Warning	SGF	Shannon, Texas	38 min
Aug 20, 12:06 PM CDT	Special Weather Statement	SGF	Howell	39 min
Aug 20, 12:12 PM CDT	Special Weather Statement	SGF	Shannon	48 min
Aug 20, 12:16 PM CDT	Special Weather Statement	SGF	Dent	44 min
Aug 20, 12:46 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon	29 min
Aug 20, 12:51 PM CDT	Severe Thunderstorm Warning	SGF	Shannon	24 min
Aug 20, 1:50 PM CDT	Special Weather Statement	SGF	Oregon	40 min
Aug 20, 5:15 PM CDT	Special Weather Statement	SGF	Cedar	45 min
Aug 20, 5:32 PM CDT	Special Weather Statement	SGF	St. Clair	43 min
Aug 20, 6:02 PM CDT	Special Weather Statement	SGF	Benton	43 min
Aug 20, 6:11 PM CDT	Special Weather Statement	SGF	Cedar, Dade	49 min
Aug 20, 6:35 PM CDT	Special Weather Statement	SGF	St. Clair	40 min
Aug 20, 6:43 PM CDT	Severe Thunderstorm Warning	SGF	Dade, Polk	32 min
Aug 20, 6:54 PM CDT	Areal Flood Advisory	SGF	Cedar, Dade, Polk	6 hr

Nearby

Heat Advisories in Missouri, 2017 Heat Advisories in Kansas, 2017 Every heat advisory in 2017

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.