Alert archive / Missouri / Special Weather Statements in 2017

Special Weather Statement, NWS Kansas City, MO

August 20, 2017Clinton County, Missouri

NWS Kansas City, MO issued this special weather statement at Aug 20, 2017, 8:23 AM CDT for Clinton County, Missouri. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 20, 2017, 8:23 AM CDT (13:23 UTC)
Expired: Aug 20, 2017, 9:15 AM CDT
In force: 52 min
Issued by: NWS Kansas City, MO

County Clinton County, MO

The radar

The Pleasant Hill radar (KEAX), 105 km from the middle of the area, began a volume at 13:25 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 12:00Z, 1.4 hours before the alert went out and 138 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: 415 J/kg
Mixed-layer CIN: -346 J/kg
Mixed-layer LCL: 1090 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: -54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Kansas City, MO wrote its last area forecast discussion before this special weather statement went out at Aug 20, 6:17 AM CDT, 2 hours 6 minutes earlier.

Area forecast discussion, Aug 20, 6:17 AM CDT, 2 hours 6 minutes before

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Hazardous weather outlook, Aug 20, 5:39 AM CDT, 2 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
539 AM CDT Sun Aug 20 2017

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-211045-
Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS-
Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler-
Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton-
Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton-
Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis-
Cooper-Bates-Henry-
539 AM CDT Sun Aug 20 2017

This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.

.DAY ONE...Today and Tonight

 Storms this morning will produce 40-50 mph winds across the Kansas
 City metro and points southeastward.

 Heat indices are expected to reach the 100 to 105 degree mark this
 afternoon area-wide.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

.DAYS TWO THROUGH SEVEN...Monday through Saturday

 Additional storms are possible early Monday morning, and are likely
 Monday night through Tuesday morning. A few storms could become
 strong to severe, particularly Monday night. In addition, heavy rain
 could lead to localized flooding.

 More detailed information can be accessed at...
 https://www.weather.gov/eax/hwo

In the hours before

Special weather statement, Aug 20, 2:55 AM CDT, 5 hours 28 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
255 AM CDT SUN AUG 20 2017

KSZ102-MOZ001>004-011-012-020-200845-
Doniphan KS-Atchison MO-Buchanan MO-Holt MO-Worth MO-Gentry MO-
Nodaway MO-Andrew MO-
255 AM CDT SUN AUG 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR DONIPHAN...NORTHWESTERN
BUCHANAN...WORTH...NORTHWESTERN GENTRY...EASTERN ATCHISON...HOLT...
NODAWAY AND ANDREW COUNTIES UNTIL 345 AM CDT...

At 255 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Blanchard to Hamlin. Movement was east at
40 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Maryville, Savannah, Wathena, Mound City, Highland, Troy, Grant City,
Oregon, Fairfax, Burlington Junction, Hopkins, Ravenwood, Maitland,
Amazonia, Skidmore, Forest City, Craig, Fillmore, White Cloud and
Denton.

This includes the following highways...
 Interstate 29 between mile markers 55 and 100.
 Interstate 229 between mile markers 10 and 14.

LAT...LON 4057 9430 3964 9500 3974 9534 4000 9534
      4000 9531 4004 9542 4012 9539 4018 9548
      4025 9549 4057 9526
TIME...MOT...LOC 0755Z 285DEG 36KT 4062 9513 3993 9565

Laflin

Special weather statement, Aug 20, 3:09 AM CDT, 5 hours 14 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill
309 AM CDT Sun Aug 20 2017

KSZ103>105-MOZ028-029-037-210000-
Leavenworth-Wyandotte-Johnson KS-Platte-Clay-Jackson-
Including the cities of Fort Leavenworth, Leavenworth, Lansing,
Kansas City Kansas, Overland Park, Stanley, Olathe, Shawnee,
Lenexa, Parkville, Platte City, Riverside, Weatherby Lake,
Weston, Gladstone, Liberty, Excelsior Springs, Kansas City,
and Independence
309 AM CDT Sun Aug 20 2017

...HOT AND MUGGY CONDITIONS THIS AFTERNOON...

Temperatures this afternoon will rise into the mid 90s across the
Kansas City Metro, and will combine with rising humidity to bring
heat indices into the 101-104 degree range. This combination of
heat and humidity could lead to heat-related illness if proper
precautions are not taken, particularly for the elderly and those
without access to air conditioning.

Laflin

Special weather statement, Aug 20, 3:39 AM CDT, 4 hours 44 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
339 AM CDT SUN AUG 20 2017

KSZ102-MOZ002>005-011>013-020-200930-
Doniphan KS-Buchanan MO-De Kalb MO-Holt MO-Worth MO-Gentry MO-
Nodaway MO-Harrison MO-Andrew MO-
339 AM CDT SUN AUG 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN DONIPHAN...
NORTHEASTERN BUCHANAN...WORTH...GENTRY...WESTERN HARRISON...
SOUTHEASTERN HOLT...SOUTHEASTERN NODAWAY...ANDREW AND DEKALB COUNTIES
UNTIL 430 AM CDT...

At 339 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Athelstan to near Troy. Movement was east
at 40 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
St. Joseph, Savannah, Albany, Gower, Wathena, Elwood, Stanberry,
Maysville, Troy, Country Club Villa, Country Club, King City, Grant
City, Stewartsville, Agency, Ravenwood, Union Star, Eagleville,
Amazonia and New Hampton.

This includes the following highways...
 Interstate 35 in Missouri between mile markers 101 and 114.
 Interstate 29 between mile markers 40 and 69.
 Interstate 229 between mile markers 0 and 14.

LAT...LON 4013 9419 4013 9422 4010 9421 3975 9447
      3974 9460 3960 9460 3976 9522 4057 9462
      4058 9386
TIME...MOT...LOC 0839Z 285DEG 36KT 4051 9458 3981 9510

Laflin

Special weather statement, Aug 20, 8:23 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 2:55 AM CDT	Special Weather Statement	EAX	Andrew, Holt, Nodaway, Worth	50 min
Aug 20, 3:39 AM CDT	Special Weather Statement	EAX	Andrew, Buchanan, DeKalb, Gentry, Worth	51 min
Aug 20, 2:36 PM CDT	Flash Flood Watch	EAX	Andrew, Bates, Buchanan, Caldwell, Carroll, Cass and 17 more	43 hr
Aug 20, 5:52 PM CDT	Special Weather Statement	EAX	Henry	23 min

Nearby

Special Weather Statements in Missouri, 2017 Every special weather statement 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.