Alert archive / Missouri / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 127, NWS Kansas City, MO

June 26, 2020Atchison County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jun 26, 2020, 11:09 PM CDT for Atchison County, Missouri. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 26, 2020, 11:09 PM CDT (04:09 UTC)
Expired: Jun 26, 2020, 11:45 PM CDT
In force: 36 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Atchison County, MO

The radar

The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 04:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 26, 7:50 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.2 hours before the alert went out and 127 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: 1803 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1399 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 26, 6:43 PM CDT, 4 hours 26 minutes earlier.

Area forecast discussion, Jun 26, 6:43 PM CDT, 4 hours 26 minutes before

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Hazardous weather outlook, Jun 26, 5:12 AM CDT, 17 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
512 AM CDT Fri Jun 26 2020

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-271015-
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-
512 AM CDT Fri Jun 26 2020

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

.DAY ONE...Today and Tonight

 Strong to severe thunderstorms will be possible this evening into
 the overnight across eastern Kansas and the northern half of
 Missouri. In addition, heat indices in the mid to upper 90s will be
 possible this afternoon.

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

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

 Scattered showers and thunderstorms will remain likely off and on
 through the weekend. The severe threat remains very low at this
 time.

 Heat index values on Sunday will climb into the mid 90s.

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

In the hours before

Special weather statement, Jun 26, 9:54 PM CDT, 1 hour 15 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
954 PM CDT Fri Jun 26 2020

MOZ001-002-270345-
Atchison MO-Nodaway MO-
954 PM CDT Fri Jun 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN ATCHISON AND
NORTHWESTERN NODAWAY COUNTIES UNTIL 1045 PM CDT...

At 954 PM CDT, Doppler radar was tracking a strong thunderstorm over
Blanchard, or 14 miles northeast of Tarkio, moving southeast at 30
mph.

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

Locations impacted include...
Burlington Junction, Clearmont, Elmo, Pickering, Westboro and
Blanchard.

This includes Interstate 29 between mile markers 117 and 123.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
northwestern Missouri.

LAT...LON 4059 9565 4057 9485 4041 9477 4049 9568
      4051 9569 4052 9566 4054 9565 4056 9567
      4056 9569 4052 9571 4052 9575 4053 9577
      4058 9577
TIME...MOT...LOC 0254Z 297DEG 26KT 4057 9517

Special weather statement, Jun 26, 10:38 PM CDT, 31 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1038 PM CDT Fri Jun 26 2020

MOZ001-002-270430-
Atchison MO-Nodaway MO-
1038 PM CDT Fri Jun 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR ATCHISON AND NODAWAY COUNTIES
UNTIL 1130 PM CDT...

At 1038 PM CDT, Doppler radar was tracking a strong thunderstorm near
Burlington Junction, or 8 miles northwest of Maryville, moving
southeast at 30 mph.

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

Locations impacted include...
Maryville, Tarkio, Rock Port, Fairfax, Burlington Junction, Skidmore,
Rockport, Clearmont, Elmo, Pickering, Westboro, Brownville, Watson,
Arkoe, Quitman, Phelps City and Brownville State Recreation Area.

This includes Interstate 29 between mile markers 105 and 123.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
northwestern Missouri.

LAT...LON 4058 9534 4044 9472 4022 9478 4035 9563
      4041 9566 4046 9564 4047 9570 4049 9568
      4051 9569 4052 9566 4054 9565 4056 9568
      4052 9571 4052 9575 4058 9577
TIME...MOT...LOC 0338Z 300DEG 27KT 4043 9498

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 9:54 PM CDT	Special Weather Statement	EAX	Atchison	51 min
Jun 26, 10:38 PM CDT	Special Weather Statement	EAX	Atchison, Nodaway	52 min
Jun 26, 11:37 PM CDT	Severe Thunderstorm Warning	EAX	Mercer, Putnam	23 min
Jun 26, 11:45 PM CDT	Special Weather Statement	EAX	Holt	45 min
Jun 26, 11:59 PM CDT	Special Weather Statement	EAX	Mercer	46 min
Jun 27, 12:17 AM CDT	Special Weather Statement	EAX	Andrew, Holt	43 min
Jun 27, 12:45 AM CDT	Special Weather Statement	EAX	Adair, Schuyler	45 min
Jun 27, 12:50 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Holt	25 min
Jun 27, 1:07 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan	38 min
Jun 27, 1:10 AM CDT	Severe Thunderstorm Warning	EAX	Adair, Putnam, Schuyler	35 min
Jun 27, 1:34 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Clinton, DeKalb, Platte	41 min
Jun 27, 1:35 AM CDT	Special Weather Statement	EAX	Adair	25 min
Jun 27, 1:55 AM CDT	Special Weather Statement	EAX	Clay, Jackson, Platte	50 min
Jun 27, 2:09 AM CDT	Severe Thunderstorm Warning	EAX	Platte	36 min
Jun 27, 2:35 AM CDT	Severe Thunderstorm Warning	EAX	Cass, Jackson, Platte	40 min
Jun 27, 2:42 AM CDT	Special Weather Statement	EAX	Clay, Jackson	48 min
Jun 27, 3:08 AM CDT	Severe Thunderstorm Warning	EAX	Cass, Jackson	37 min
Jun 27, 3:31 AM CDT	Severe Thunderstorm Warning	EAX	Cass, Jackson	29 min
Jun 27, 3:59 AM CDT	Special Weather Statement	EAX	Johnson	46 min
Jun 27, 4:25 AM CDT	Areal Flood Advisory	EAX	Cass, Jackson	3 hr
Jun 27, 6:03 AM CDT	Special Weather Statement	EAX	Linn	42 min
Jun 27, 8:35 AM CDT	River Flood Warning	EAX	Atchison	11 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2020 Every severe thunderstorm warning in 2020

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.