Alert archive / Missouri / Special Weather Statements in 2009

Special Weather Statement, NWS Kansas City, MO

April 26, 2009DeKalb County, Missouri

NWS Kansas City, MO issued this special weather statement at Apr 26, 2009, 1:13 PM CDT for DeKalb County, Missouri. It was in force for 32 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: Apr 26, 2009, 1:13 PM CDT (18:13 UTC)
Expired: Apr 26, 2009, 1:45 PM CDT
In force: 32 min
Issued by: NWS Kansas City, MO

County DeKalb County, MO

The radar

The Pleasant Hill radar (KEAX), 126 km from the middle of the area, began a volume at 18:13 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 12:00Z, 6.2 hours before the alert went out and 144 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: 2039 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 301 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Apr 26, 12:33 PM CDT, 40 minutes earlier.

Area forecast discussion, Apr 26, 12:33 PM CDT, 40 minutes before

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Hazardous weather outlook, Apr 26, 12:57 PM CDT, 16 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1257 PM CDT SUN APR 26 2009

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-271800-
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-
1257 PM CDT SUN APR 26 2009

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

A FRONTAL BOUNDARY CURRENTLY STALLED ACROSS NORTH CENTRAL KANSAS
NORTHWARD INTO CENTRAL AND EASTERN NEBRASKA AND WESTERN IOWA WILL BE THE
FOCUS POINT FOR STRONG TO SEVERE THUNDERSTORM ACTIVITY THROUGH THE
AFTERNOON AND EVENING HOURS. AMPLE BREAKS IN THE CLOUDS SOUTHEAST OF
THIS FRONT HAVE ALLOWED INSTABILITY TO GROW...WITH LITTLE IN THE WAY OF
CAPPING PREVENTING STORMS FROM DEVELOPING. ALTHOUGH WHILE THE MAIN
FOCUS FOR STORMS WILL BE ALONG AND AHEAD OF THE FRONT THIS
AFTERNOON...GIVEN THE WEAK INHIBITION THE ENTIRE OUTLOOK AREA HAS A
CHANCE TO SEE THUNDERSTORMS...INCLUDING SUPERCELLS...WITH LARGE HAIL
AND DAMAGING HIGH WINDS THE MAIN HAZARDS. GIVEN AN INCREASING WIND
PROFILE ALOFT...A TORNADO OR TWO WILL ALSO BE POSSIBLE...ESPECIALLY
IN AREAS ALONG AND AHEAD OF THE FRONT IF A STORM CAN ANCHOR ITSELF TO
THAT BOUNDARY.

THE FRONT WILL THEN BEGIN TO SLOWLY SLIDE SOUTHWARD DURING THE
EVENING HOURS AND WITH THE ORIENTATION OF THE SHEAR PARALLEL TO THE
BOUNDARY TRAINING STORMS ARE EXPECTED. THIS WILL RESULT IN HEAVY RAIN
AND POSSIBLY FLOODING INTO MONDAY MORNING...ALONG WITH AN ADDITIONAL
SEVERE WEATHER THREAT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

BY MONDAY AFTERNOON THE FRONT WILL BE DRAPED FROM NORTHEAST MISSOURI
THROUGH CENTRAL PORTIONS OF THE STATE AND INTO SOUTHWEST MISSOURI.
THE FRONT WILL ONCE AGAIN BE THE FOCUS FOR STRONG TO SEVERE
THUNDERSTORMS DURING THE AFTERNOON AND EVENING HOURS. THE MAIN
HAZARDS FROM THESE STORMS WILL BE FROM HAIL AND DAMAGING WINDS. THIS
FRONT IS EXPECTED TO CLEAR THE AREA BY MONDAY EVENING...ENDING THE
THREAT OF SEVERE WEATHER.

ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE BY WEDNESDAY AFTERNOON
THROUGH THURSDAY AS ANOTHER STORM SYSTEM LIFTS INTO THE AREA. AT THIS
TIME IT IS STILL TOO EARLY TO DETERMINE IF SEVERE STORMS WILL BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON THROUGH SUNDAY
NIGHT ACROSS THE OUTLOOK AREA.

DUX/NRR

In the hours before

Special weather statement, Apr 26, 12:11 PM CDT, 1 hour 2 minutes before

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Special weather statement, Apr 26, 12:30 PM CDT, 43 minutes before

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Local storm report, Apr 26, 12:45 PM CDT, 28 minutes before

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Special weather statement, Apr 26, 12:46 PM CDT, 27 minutes before

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Special weather statement, Apr 26, 1:13 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 7:30 PM CDT	Special Weather Statement	EAX	Clay	30 min
Apr 25, 8:43 PM CDT	Special Weather Statement	EAX	Clinton	32 min
Apr 25, 8:48 PM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Clinton, DeKalb	42 min
Apr 25, 8:57 PM CDT	Severe Thunderstorm Warning	EAX	Platte	29 min
Apr 25, 8:59 PM CDT	Tornado Warning	EAX	Caldwell, Clinton, DeKalb	31 min
Apr 25, 9:20 PM CDT	Tornado Warning	EAX	Caldwell, Daviess	25 min
Apr 25, 9:31 PM CDT	Severe Thunderstorm Warning	EAX	Daviess, DeKalb	29 min
Apr 25, 9:36 PM CDT	Special Weather Statement	EAX	Platte	24 min
Apr 25, 9:48 PM CDT	Special Weather Statement	EAX	Daviess	27 min
Apr 25, 9:53 PM CDT	Severe Thunderstorm Warning	EAX	Buchanan, Platte	37 min
Apr 25, 9:58 PM CDT	Special Weather Statement	EAX	Daviess	32 min
Apr 25, 10:05 PM CDT	Tornado Warning	EAX	Buchanan, Clinton, Platte	22 min
Apr 25, 10:43 PM CDT	Special Weather Statement	EAX	Grundy	32 min
Apr 25, 11:13 PM CDT	Special Weather Statement	EAX	DeKalb	32 min
Apr 25, 11:24 PM CDT	Special Weather Statement	EAX	Mercer	36 min
Apr 25, 11:31 PM CDT	Special Weather Statement	EAX	Gentry	29 min
Apr 26, 12:06 AM CDT	Special Weather Statement	EAX	Worth	24 min
Apr 26, 7:13 AM CDT	High Wind Warning	EAX	Cass	99 min
Apr 26, 12:11 PM CDT	Special Weather Statement	EAX	Buchanan	34 min
Apr 26, 12:30 PM CDT	Special Weather Statement	EAX	Andrew	30 min
Apr 26, 12:46 PM CDT	Special Weather Statement	EAX	Buchanan	29 min
Apr 26, 4:03 PM CDT	Special Weather Statement	EAX	Atchison	27 min
Apr 26, 4:59 PM CDT	Special Weather Statement	EAX	Holt, Nodaway	31 min
Apr 26, 5:05 PM CDT	Tornado Warning	EAX	Atchison, Nodaway	15 min
Apr 26, 5:29 PM CDT	Special Weather Statement	EAX	Gentry, Worth	31 min
Apr 26, 5:43 PM CDT	Severe Thunderstorm Warning	EAX	Gentry, Nodaway, Worth	22 min
Apr 26, 6:11 PM CDT	Special Weather Statement	EAX	Harrison	34 min
Apr 26, 6:37 PM CDT	Areal Flood Advisory	EAX	Andrew, Holt, Nodaway	6 hr
Apr 26, 6:38 PM CDT	Special Weather Statement	EAX	Andrew, Holt, Nodaway	37 min
Apr 25, 8:00 PM CDT	Special Weather Statement	EAX	Leavenworth	30 min
Apr 25, 8:20 PM CDT	Severe Thunderstorm Warning	EAX	Leavenworth	25 min
Apr 25, 8:35 PM CDT	Tornado Warning	EAX	Leavenworth	25 min
Apr 25, 11:27 PM CDT	Flash Flood Warning	EAX	Leavenworth	98 min
Apr 26, 1:38 AM CDT	High Wind Warning	EAX	Johnson, Linn, Miami	109 min

Nearby

Special Weather Statements in Missouri, 2009 Every special weather statement in 2009

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.