Alert archive / Missouri / Special Weather Statements in 2017

Special Weather Statement, NWS Kansas City, MO

December 4, 2017Jackson County, Missouri

NWS Kansas City, MO issued this special weather statement at Dec 4, 2017, 2:20 PM CST for Jackson County, Missouri. It was in force for 25 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: Dec 4, 2017, 2:20 PM CST (20:20 UTC)
Expired: Dec 4, 2017, 2:45 PM CST
In force: 25 min
Issued by: NWS Kansas City, MO

County Jackson County, MO

The radar

The Pleasant Hill radar (KEAX), 5 km from the middle of the area, began a volume at 20:23 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 12:00Z, 8.3 hours before the alert went out and 118 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: 30 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 773 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 385 m²/s²
0-3 km storm-relative helicity: 405 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Dec 4, 11:36 AM CST, 2 hours 44 minutes earlier.

Area forecast discussion, Dec 4, 11:36 AM CST, 2 hours 44 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Dec 4, 11:22 AM CST, 2 hours 58 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
1122 AM CST Mon Dec 4 2017

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-051730-
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-
1122 AM CST Mon Dec 4 2017

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

.DAY ONE...This Afternoon and Tonight

Isolated severe storms are possible this afternoon east of I-35.
Damaging winds and small hail will be the main threats. High fire
danger will develop this afternoon across northwestern MO and
northeastern KS.

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

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

 Very high fire danger is expected across the region Tuesday.

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

In the hours before

Special weather statement, Dec 4, 2:20 PM CST, 0 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
220 PM CST MON DEC 4 2017

MOZ037-038-043-044-042045-
Cass MO-Johnson MO-Lafayette MO-Jackson MO-
220 PM CST MON DEC 4 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CASS...SOUTHWESTERN
LAFAYETTE...SOUTHEASTERN JACKSON AND NORTHWESTERN JOHNSON COUNTIES
UNTIL 245 PM CST...

At 220 PM CST, Doppler radar was tracking a strong thunderstorm over
Greenwood, moving northeast at 40 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Lee's Summit, Blue Springs, Grandview, Belton, Raymore, Grain Valley,
Pleasant Hill, Oak Grove, Greenwood, Peculiar, Lake Lotawana, Lake
Winnebago, Lone Jack, Baldwin Park, Lake Lafayette, Bates City, Unity
Village and Tarsney Lakes.

This includes the following highways...
 Interstate 70 in Missouri between mile markers 21 and 32.
 Interstate 470 between mile markers 7 and 12.

LAT...LON 3870 9442 3886 9455 3911 9415 3889 9391
TIME...MOT...LOC 2020Z 234DEG 36KT 3887 9434

Mell

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 4, 2:53 PM CST	Special Weather Statement	EAX	Linn, Livingston	37 min
Dec 4, 3:17 PM CST	Special Weather Statement	EAX	Bates	43 min
Dec 4, 3:30 PM CST	Severe Thunderstorm Warning	EAX	Bates, Henry	30 min
Dec 4, 3:33 PM CST	Severe Thunderstorm Warning	EAX	Johnson, Lafayette, Saline	27 min
Dec 4, 3:47 PM CST	Special Weather Statement	EAX	Adair, Linn	43 min
Dec 4, 3:59 PM CST	Severe Thunderstorm Warning	EAX	Adair, Macon	31 min
Dec 4, 4:15 PM CST	Severe Thunderstorm Warning	EAX	Cooper, Howard, Saline	30 min
Dec 4, 4:41 PM CST	Severe Thunderstorm Warning	EAX	Howard, Randolph	34 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.