Alert archive / Kansas / Heat Advisories in 2017

Heat Advisory 8, NWS Wichita, KS

August 20, 201715 counties in Kansas

NWS Wichita, KS issued this heat advisory at Aug 20, 2017, 4:14 AM CDT for 15 counties in Kansas. It took effect at Aug 20, 2017, 1:00 PM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Aug 20, 2017, 4:14 AM CDT (09:14 UTC)
In effect from
Aug 20, 2017, 1:00 PM CDT
Expired
Aug 20, 2017, 6:57 PM CDT
In force
6 hr
Issued by
NWS Wichita, KS

Counties Allen County, KS, Butler County, KS, Chautauqua County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Harper County, KS, Kingman County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Sedgwick County, KS, Sumner County, KS, Wilson County, KS, Woodson County, KS

The radar

The Wichita radar (KICT), 90 km from the middle of the area, began a volume at 09:15 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, 9.2 hours before the alert went out and 181 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-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2017-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2234 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2017-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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 Wichita, KS wrote its last area forecast discussion before this heat advisory went out at Aug 20, 3:54 AM CDT, 20 minutes earlier.

Area forecast discussion, Aug 20, 3:54 AM CDT, 20 minutes before
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Hazardous weather outlook, Aug 19, 10:39 PM CDT, 5 hours 35 minutes before
Hazardous Weather Outlook
National Weather Service Wichita KS
1039 PM CDT Sat Aug 19 2017

KSZ032-033-047>053-067>072-082-083-091>096-098>100-210345-
Russell-Lincoln-Barton-Ellsworth-Saline-Rice-McPherson-Marion-Chase-
Reno-Harvey-Butler-Greenwood-Woodson-Allen-Kingman-Sedgwick-Harper-
Sumner-Cowley-Elk-Wilson-Neosho-Chautauqua-Montgomery-Labette-
1039 PM CDT Sat Aug 19 2017

This hazardous weather outlook is for portions of Central Kansas,
South Central Kansas and Southeast Kansas.

.DAY ONE...Tonight

A few isolated hit-or-miss storms will impact portions of south
central and southeast Kansas overnight. The strongest activity will
be capable of quarter size hail, 60 mph winds and heavy rain.
Additionally, a cluster or two of storms is possible generally
north of Interstate 70. Winds to 55 mph, small hail and locally
heavy rain is possible with this activity.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Heat indices from 100 to 105 degrees are likely Sunday afternoon
and early evening across southern and especially southeast Kansas.

Storms are possible Sunday night into Monday for mainly central and
eastern Kansas, with storms becoming more numerous Monday night
into Tuesday, as a strong cold front moves through. At least some
strong storms with heavy rain appear possible with this activity.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

&&

For a graphical version of this information, see our webpage at:
http://weather.gov/wichita/hwo/

In the hours before

Special weather statement, Aug 20, 1:11 AM CDT, 3 hours 3 minutes before
Special Weather Statement
National Weather Service Wichita KS
111 AM CDT SUN AUG 20 2017

KSZ095-200715-
Wilson KS-
111 AM CDT SUN AUG 20 2017

The National Weather Service in Wichita has issued a

* Significant Weather Advisory for...
  Southwestern Wilson County in southeastern Kansas...

* Until 215 AM CDT

* At 110 AM CDT...National Weather Service Doppler radar was tracking
  a strong thunderstorm with locally heavy rainfall 6 miles southwest
  of Fredonia...moving north at 10 mph.

Hail up to the size of dimes...and wind gusts up to 50 mph will be
possible with this storm.

* Locations impacted include...
  Fredonia, New Albany and Buxton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to take shelter in the event the storms intensify and
become severe...or a warning is issued by the National Weather
Service.

These storms may produce ponding of water on roadways. Listen for
later statements or possible flood warnings...should the risk for
minor low-land flooding become more imminent.

&&

LAT...LON 3763 9596 3760 9565 3739 9575 3739 9596
TIME...MOT...LOC 0611Z 195DEG 9KT 3745 9587

CARUSO
Special weather statement, Aug 20, 2:09 AM CDT, 2 hours 5 minutes before
Special Weather Statement
National Weather Service Wichita KS
209 AM CDT SUN AUG 20 2017

KSZ094>096-099-200815-
Montgomery KS-Wilson KS-Neosho KS-Elk KS-
209 AM CDT SUN AUG 20 2017

The National Weather Service in Wichita has issued a

* Significant Weather Advisory for...
  Northern Montgomery County in southeastern Kansas...
  Wilson County in southeastern Kansas...
  Southwestern Neosho County in southeastern Kansas...
  Northeastern Elk County in southeastern Kansas...

* Until 315 AM CDT

* At 206 AM CDT...National Weather Service Doppler radar was tracking
  strong thunderstorms with locally heavy rainfall along a line
  extending from 6 miles west of Fredonia to near Independence...and
  moving northeast at 15 mph.

Hail up to the size of dimes...wind gusts up to 50 mph...and very
heavy rainfall rates of 1 to 2 inches per hour can be expected with
these storms.

* Locations impacted include...
  Independence, Neodesha, Fredonia, Thayer, Altoona, Sycamore,
  Benedict, New Albany, Coyville, Buxton and Elk City Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3744 9605 3760 9598 3760 9596 3763 9596
      3773 9592 3773 9588 3751 9543 3719 9566
TIME...MOT...LOC 0707Z 221DEG 12KT 3750 9594 3728 9571

CARUSO

The office that day

Everything else NWS Wichita, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 1:11 AM CDTSpecial Weather StatementICTWilson64 min
Aug 20, 2:09 AM CDTSpecial Weather StatementICTWilson66 min
Aug 20, 2:45 AM CDTAreal Flood WarningICTWilson7 hr
Aug 20, 3:13 AM CDTSevere Thunderstorm WarningICTWilson40 min
Aug 20, 3:29 AM CDTFlash Flood WarningICTWilson6 hr

Nearby

Heat Advisories in Kansas, 2017Every 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.