Alert archive / Missouri / Special Weather Statements in 2018

Special Weather Statement, NWS Kansas City, MO

May 20, 2018Cooper County, Missouri

NWS Kansas City, MO issued this special weather statement at May 20, 2018, 7:10 PM CDT for Cooper County, Missouri. It was in force for 50 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: May 20, 2018, 7:10 PM CDT (00:10 UTC)
Expired: May 20, 2018, 8:00 PM CDT
In force: 50 min
Issued by: NWS Kansas City, MO

County Cooper County, MO

The radar

The Pleasant Hill radar (KEAX), 125 km from the middle of the area, began a volume at 00:12 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.2 hours before the alert went out and 235 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: 1752 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 917 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 109 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 May 20, 6:18 PM CDT, 52 minutes earlier.

Area forecast discussion, May 20, 6:18 PM CDT, 52 minutes before

AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
618 PM CDT Sun May 20 2018

.Discussion...
Issued at 148 PM CDT SUN MAY 20 2018

Beneficial rains have been observed across areas mainly south of
I-70 as of the early afternoon. Totals have generally ranged from
a tenth to 1 inch for most of the area, while totals south of
Highway 50 have ranged from half an inch up to an inch and a half.
While no flooding concerns were observed, these more southern
areas could be sensitive to additional rainfall expected this
afternoon. Up to a half inch more is possible until the evening
time frame, with locally higher amounts possible. The forcing for
this subsequent round of activity will come in the form of
moisture convergence ahead of a frontal boundary stretched across
south central Kansas into central Oklahoma. A weak mid-level
impulse will also provide modest ascent to maintain rain showers
with embedded thunderstorms as the boundary pushes into the local
area. Expecting to see this line of activity to affect eastern
Kansas and western Missouri in the early afternoon, before pushing
through central and then eastern Missouri through the late
afternoon and early evening. While no widespread severe weather is
expected due to a stabilized local environment, some storms could
become organized enough to promote the potential for hail and
gusty winds, as pockets of clearing have been noted via visible
satellite imagery.

Low-level cloud cover will hold on through the overnight hours
before scattering out late Monday morning and afternoon. Weak
northwesterly surface flow will maintain near-seasonal high temps
Monday afternoon, though a ridging pattern through the mid-week will
bring a return of above-seasonable temps through the better part of
the work week. Would not be surprised to see some areas reach the 90
degree mark from Wednesday through the late week. There are some
chances of storm development throughout the week as weak
shortwaves trek across the ridge axis, with the most likely setup
for widespread precip holding off until Thursday. Weak wind fields
aloft during this time should moderate any chances of storms
becoming severe, though this trend will need to be monitored given
a progged unstable environment. Better chances for more organized
convection looks to hold off until the weekend time frame.

&&

.Aviation...(For the 00Z TAFS through 00Z Monday Evening)
Issued at 618 PM CDT SUN MAY 20 2018

VFR conditions initially will deteriorate to low MVFR and possibly
IFR ceilings later tonight and persist through tomorrow morning.
Confidence is high on the MVFR ceilings and medium on IFR ceilings
developing. Winds will be light through the forecast but trend to
the west-northwest overnight.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
MO...NONE.
&&

Discussion...Welsh
Aviation...CDB

Hazardous weather outlook, May 20, 4:53 AM CDT, 14 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
453 AM CDT Sun May 20 2018

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-211000-
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-
453 AM CDT Sun May 20 2018

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

.DAY ONE...Today and Tonight

 Several rounds of storms will be possible today. Morning storms are
 expected to remain sub-severe but may see small hail and gusty
 winds with stronger storms.

 Another round of storms will be possible this afternoon and evening.
 Some of the storms may become strong to marginally severe with hail
 and strong winds the primary concern...generally along and south of
 Highway 36.

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

.DAYS TWO THROUGH SEVEN...Monday through Saturday

 Periodic rain and thunderstorm chances will continue through much of
 the week. Best chance for more widespread activity will occur later
 in the week.

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

In the hours before

Local storm report, May 20, 5:34 PM CDT, 1 hour 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
534 PM CDT SUN MAY 20 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0442 PM     HAIL             RICH HILL               38.10N 94.36W
05/20/2018  E0.25 INCH       BATES              MO   911 CALL CENTER

&&

SGA

Special weather statement, May 20, 5:56 PM CDT, 1 hour 14 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
556 PM CDT SUN MAY 20 2018

MOZ054-202330-
Henry MO-
556 PM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN HENRY COUNTY UNTIL
630 PM CDT...

At 555 PM CDT, Doppler radar was tracking a strong thunderstorm near
Deepwater, or near Clinton, moving northeast at 25 mph.

Nickel size hail will be possible with this storm.

This strong thunderstorm will be near...
  Clinton around 605 PM CDT.
  Calhoun around 625 PM CDT.

Other locations impacted by this storm include Brownington, La Due,
Coal, Tightwad and Truman Lake.

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.

If on or near Truman Lake, get out of the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.

&&

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
west central Missouri.

LAT...LON 3823 9384 3832 9391 3851 9359 3843 9351
      3833 9352 3821 9379
TIME...MOT...LOC 2255Z 238DEG 23KT 3831 9379

Cutter

Special weather statement, May 20, 6:27 PM CDT, 43 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
627 PM CDT SUN MAY 20 2018

MOZ045-210015-
Pettis MO-
627 PM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PETTIS COUNTY UNTIL
715 PM CDT...

At 627 PM CDT, Doppler radar was tracking a strong thunderstorm near
Knob Noster, moving east at 10 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Houstonia.

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.

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 3880 9350 3888 9349 3894 9334 3880 9332
TIME...MOT...LOC 2327Z 254DEG 9KT 3882 9350

Cutter

Special weather statement, May 20, 6:29 PM CDT, 41 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
629 PM CDT SUN MAY 20 2018

MOZ045-054-210000-
Pettis MO-Henry MO-
629 PM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HENRY AND
SOUTHWESTERN PETTIS COUNTIES UNTIL 700 PM CDT...

At 629 PM CDT, Doppler radar was tracking a strong thunderstorm near
Windsor, moving northeast at 30 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Windsor, Green Ridge, Calhoun and Truman Lake.

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.

&&

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
west central Missouri.

LAT...LON 3848 9365 3856 9354 3856 9351 3858 9351
      3871 9333 3854 9320 3854 9328 3851 9330
      3851 9351 3843 9351 3833 9352
TIME...MOT...LOC 2329Z 234DEG 26KT 3846 9350

Cutter

Special weather statement, May 20, 6:54 PM CDT, 16 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
654 PM CDT SUN MAY 20 2018

MOZ039-045-210045-
Saline MO-Pettis MO-
654 PM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PETTIS AND SOUTH
CENTRAL SALINE COUNTIES UNTIL 745 PM CDT...

At 654 PM CDT, Doppler radar was tracking a strong thunderstorm over
Houstonia, or 8 miles southeast of Sweet Springs, moving east at 20
mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
this storm.

This storm will remain over mainly rural areas of northeastern Pettis
and south central Saline Counties, including the following
locations... Hughesville.

This includes Interstate 70 in Missouri between mile markers 78 and
81.

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.

&&

LAT...LON 3881 9340 3890 9342 3899 9313 3879 9313
TIME...MOT...LOC 2354Z 258DEG 16KT 3887 9332

Cutter

Special weather statement, May 20, 7:10 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
710 PM CDT SUN MAY 20 2018

MOZ040-046-210100-
Cooper MO-Howard MO-
710 PM CDT SUN MAY 20 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HOWARD AND COOPER
COUNTIES UNTIL 800 PM CDT...

At 710 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Smithton to Otterville to 8 miles west of
Tipton. Movement was northeast at 45 mph.

Half inch hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Boonville, Pilot Grove, Otterville, Bunceton, Blackwater, Lamine and
Clifton City.

This includes Interstate 70 in Missouri between mile markers 87 and
113.

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 3869 9275 3869 9305 3885 9306 3898 9304
      3906 9294 3897 9273 3897 9262 3894 9252
TIME...MOT...LOC 0010Z 213DEG 40KT 3870 9305 3869 9297 3864 9293

Cutter

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 7:23 PM CDT	Severe Thunderstorm Warning	EAX	Cooper	37 min

Nearby

Special Weather Statements in Missouri, 2018 Every special weather statement in 2018

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.