Alert archive / Kansas / Special Weather Statements in 2021

Special Weather Statement, NWS Kansas City, MO

March 17, 2021Leavenworth County, Kansas

NWS Kansas City, MO issued this special weather statement at Mar 17, 2021, 2:57 AM CDT for Leavenworth County, Kansas. It was in force for 48 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: Mar 17, 2021, 2:57 AM CDT (07:57 UTC)
Expired: Mar 17, 2021, 3:45 AM CDT
In force: 48 min
Issued by: NWS Kansas City, MO

County Leavenworth County, KS

The radar

The Pleasant Hill radar (KEAX), 77 km from the middle of the area, began a volume at 07:59 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 (KTOP), launched 00:00Z, 8.0 hours before the alert went out and 58 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 295 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 Mar 16, 11:08 PM CDT, 3 hours 49 minutes earlier.

Area forecast discussion, Mar 16, 11:08 PM CDT, 3 hours 49 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Mar 16, 12:29 PM CDT, 14 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
1229 PM CDT Tue Mar 16 2021

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-171730-
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-
1229 PM CDT Tue Mar 16 2021

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

 Scattered thunderstorms are expected to develop after midnight. A
few storms could be strong to severe with hail up to quarter sized
and winds up to 60mph as the main threat.

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

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

 Additional chances for showers and thunderstorms continue into
 Wednesday with additional strong to severe storms will be possible.

 Rain chances continue through Thursday with widespread amounts of
 2-3 inches possible this week.

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

In the hours before

Special weather statement, Mar 17, 2:57 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
257 AM CDT Wed Mar 17 2021

KSZ103-170845-
Leavenworth KS-
257 AM CDT Wed Mar 17 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LEAVENWORTH COUNTY
UNTIL 345 AM CDT...

At 257 AM CDT, Doppler radar was tracking a strong thunderstorm near
Williamstown, or near Lawrence, moving northeast at 25 mph.

Nickel size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Leavenworth, Lansing, Tonganoxie, Basehor, Reno, Fairmount and
Jarbalo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3921 9518 3931 9504 3926 9490 3920 9489
      3920 9490 3913 9490 3912 9491 3902 9519
TIME...MOT...LOC 0757Z 228DEG 20KT 3905 9525

Leighton

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 3:09 AM CDT	Special Weather Statement	EAX	Bates	51 min
Mar 17, 3:23 AM CDT	Severe Thunderstorm Warning	EAX	Bates, Cass, Henry	37 min
Mar 17, 4:01 AM CDT	Severe Thunderstorm Warning	EAX	Henry, Johnson	44 min
Mar 17, 4:16 AM CDT	Special Weather Statement	EAX	Henry	44 min
Mar 17, 5:02 AM CDT	Severe Thunderstorm Warning	EAX	Bates	43 min
Mar 17, 6:01 AM CDT	Special Weather Statement	EAX	Bates, Henry	44 min
Mar 17, 6:51 AM CDT	River Flood Warning	EAX	Cooper	65 hr
Mar 17, 7:00 AM CDT	River Flood Warning	EAX	Cooper	54 hr
Mar 17, 8:11 AM CDT	Special Weather Statement	EAX	Buchanan, Clay, Jackson, Platte	49 min
Mar 17, 9:24 AM CDT	River Flood Warning	EAX	Bates	21 days
Mar 17, 9:48 AM CDT	River Flood Warning	EAX	Carroll, Chariton, Saline	53 hr
Mar 17, 9:48 AM CDT	River Flood Warning	EAX	Jackson, Lafayette, Ray	4 days
Mar 17, 9:48 AM CDT	River Flood Warning	EAX	Carroll, Lafayette, Saline	4 days
Mar 17, 9:48 AM CDT	River Flood Warning	EAX	Cooper, Howard	68 hr
Mar 17, 9:48 AM CDT	River Flood Warning	EAX	Chariton, Howard, Saline	5 days
Mar 17, 10:25 AM CDT	River Flood Warning	EAX	Howard	38 hr
Mar 17, 10:25 AM CDT	River Flood Warning	EAX	Ray	3 days
Mar 17, 2:15 PM CDT	Winter Weather Advisory	EAX	Bates, Buchanan, Caldwell, Carroll, Cass, Clay and 7 more	14 hr
Mar 17, 4:53 AM CDT	Special Weather Statement	EAX	Miami	52 min
Mar 17, 9:24 AM CDT	River Flood Warning	EAX	Miami	4 days
Mar 17, 9:24 AM CDT	River Flood Warning	EAX	Linn	6 days

Nearby

Special Weather Statements in Kansas, 2021 Every special weather statement in 2021

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.