Alert archive / Missouri / Special Weather Statements in 2021

Special Weather Statement, NWS Kansas City, MO

September 17, 2021Schuyler County, Missouri

NWS Kansas City, MO issued this special weather statement at Sep 17, 2021, 3:57 PM CDT for Schuyler County, Missouri. It was in force for 33 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
Sep 17, 2021, 3:57 PM CDT (20:57 UTC)
Expired
Sep 17, 2021, 4:30 PM CDT
In force
33 min
Issued by
NWS Kansas City, MO
Hail
0.75 in
Wind
40

County Schuyler County, MO

The radar

The Des Moines radar (KDMX), 175 km from the middle of the area, began a volume at 21:01 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

Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 230 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2021-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2021-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1617 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
110 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 Sep 17, 2:21 PM CDT, 1 hour 36 minutes earlier.

Area forecast discussion, Sep 17, 2:21 PM CDT, 1 hour 36 minutes before
AREA FORECAST DISCUSSION
National Weather Service Kansas City/Pleasant Hill MO
221 PM CDT Fri Sep 17 2021

.Discussion...
Issued at 213 PM CDT FRI SEP 17 2021

Today:

A cold front has been slowly drifting into our area today and
brought shower activity to far northwest Missouri this morning. This
activity has diminished, however, as the front continues to drift
south, a few additional showers or thunderstorms may pop up with
day time heating. This activity will be very isolated and most
will stay day. Additionally activity should stay confined to north
of I-70 with best chances in northwest MO. Severe weather is not
expected. This activity will diminish after sunset tonight with
dry conditions returning thereafter.

The Weekend:

Unfortunately Friday's cold front won't have much of an impact on
temperatures heading into the weekend. On Saturday, a ridge over
the four corners region will start to push into our area. This
will bring continued dry conditions and temperatures heating up
to the mid 80s. The ridge will continue to drift east on Sunday
along with strengthening southerly flow. Temperatures on Sunday
should heat up to the upper 80s to near 90 in some locations.

The Workweek:

The ridge will make its final push out of the area on
Monday. As it makes its way out, we will see breezy southerly
surface winds and temperatures will still heat to near 90s before
the ridge shifts east. Big change is coming on Tuesday as a broad
scale upper level trough starts barreling toward the Midwest.
With it comes an aggressive cold front which will knock
temperatures way back to the 70s for much of the week.
Additionally, this front will bring our next chance of shower and
thunderstorm chances. This activity is expected to be exiting the
area by Tuesday afternoon. Tuesday afternoon may only see highs
around 75 degrees for areas south of I-70. Northern Missouri may
struggle to make to 70. Cool and dry weather is expected to
continue through the end of the week with the gradual recovery to
near normal temperatures by Friday and Saturday.

&&

.Aviation...(For the 18Z TAFS through 18Z Saturday Afternoon)
Issued at 1221 PM CDT FRI SEP 17 2021

Chance for a few isolated shower this afternoon,but generally
thinking it will stay dry at most of the TAF sites. Outside of
that, the TAF period should be pretty quiet with winds turning
around to the north as the front passes through this afternoon and
evening.

&&

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

Discussion...HB
Aviation...HB
Hazardous weather outlook, Sep 17, 4:51 AM CDT, 11 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
451 AM CDT Fri Sep 17 2021

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-181000-
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-
451 AM CDT Fri Sep 17 2021

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

.DAY ONE...Today and Tonight

Isolated thunderstorms will be possible north of Interstate 70 this
afternoon and evening. Severe weather is not expected.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Thunderstorms will be possible on Monday as a cold front moves
through the area.

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

In the hours before

Special weather statement, Sep 17, 3:29 PM CDT, 28 minutes before
Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
329 PM CDT Fri Sep 17 2021

MOZ012-013-021-172100-
Clinton MO-De Kalb MO-Andrew MO-
329 PM CDT Fri Sep 17 2021

...A strong thunderstorm will impact portions of northern Clinton and
southern DeKalb Counties through 400 PM CDT...

At 328 PM CDT, Doppler radar was tracking a strong thunderstorm near
Clarksdale, or 11 miles west of Maysville. This storm is headed
southeast.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Cameron, Maysville, Stewartsville, Osborn, Clarksdale and Amity.

This includes Interstate 35 in Missouri between mile markers 51 and
56.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3978 9420 3972 9421 3964 9433 3961 9457
      3975 9460 3982 9460 3982 9462 3990 9464
      3997 9446
TIME...MOT...LOC 2028Z 300DEG 3KT 3988 9458

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Klaus
Special weather statement, Sep 17, 3:45 PM CDT, 12 minutes before
Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
345 PM CDT Fri Sep 17 2021

KSZ025-102-MOZ020-028-172115-
Doniphan KS-Atchison KS-Platte MO-Buchanan MO-
345 PM CDT Fri Sep 17 2021

...A strong thunderstorm will impact portions of southwestern
Doniphan, central Atchison, southwestern Buchanan and northwestern
Platte Counties through 415 PM CDT...

At 344 PM CDT, Doppler radar was tracking a strong thunderstorm over
Lancaster, or 9 miles west of Atchison, moving southeast at 15 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Atchison, Lancaster, Lewis And Clark Village, Farmington, Huron,
Cummings, Potter and Lewis And Clark Vi.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3965 9541 3965 9534 3967 9534 3969 9528
      3954 9503 3946 9502 3941 9517 3942 9528
      3964 9546
TIME...MOT...LOC 2044Z 320DEG 15KT 3957 9532

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Klaus
Special weather statement, Sep 17, 3:57 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
357 PM CDT Fri Sep 17 2021

MOZ007-008-017-172130-
Schuyler MO-Putnam MO-Adair MO-
357 PM CDT Fri Sep 17 2021

...A strong thunderstorm will impact portions of northwestern Adair,
southeastern Putnam and southern Schuyler Counties through 430 PM
CDT...

At 357 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles west of Queen City, or 13 miles southwest of Lancaster, moving
southeast at 15 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Kirksville, Queen City, Novinger, Greentop, Worthington and Livonia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4043 9289 4055 9272 4038 9239 4024 9250
      4015 9270
TIME...MOT...LOC 2057Z 307DEG 15KT 4039 9273

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Klaus

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 17, 3:29 PM CDTSpecial Weather StatementEAXDeKalb31 min
Sep 17, 4:18 PM CDTSpecial Weather StatementEAXClinton27 min
Sep 17, 5:01 PM CDTSpecial Weather StatementEAXAdair29 min
Sep 17, 5:44 PM CDTSpecial Weather StatementEAXPlatte31 min
Sep 17, 3:45 PM CDTSpecial Weather StatementEAXAtchison30 min
Sep 17, 3:58 PM CDTSpecial Weather StatementEAXAtchison32 min

Nearby

Special Weather Statements in Missouri, 2021Every 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.