Alert archive / Missouri / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 213, NWS Kansas City, MO

July 10, 2009Buchanan County, Clinton County, DeKalb County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Jul 10, 2009, 4:29 AM CDT for Buchanan County, Clinton County, DeKalb County, Missouri. It was in force for 31 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: Jul 10, 2009, 4:29 AM CDT (09:29 UTC)
Expired: Jul 10, 2009, 5:00 AM CDT
In force: 31 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon

Counties Buchanan County, MO, Clinton County, MO, DeKalb County, MO

The radar

The Pleasant Hill radar (KEAX), 104 km from the middle of the area, began a volume at 09:32 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, 9.5 hours before the alert went out and 124 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: 837 J/kg
Mixed-layer CIN: -362 J/kg
Mixed-layer LCL: 1778 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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 Jul 10, 4:02 AM CDT, 27 minutes earlier.

Area forecast discussion, Jul 10, 4:02 AM CDT, 27 minutes before

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Hazardous weather outlook, Jul 9, 1:10 PM CDT, 15 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
110 PM CDT THU JUL 9 2009

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-101815-
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-
110 PM CDT THU JUL 9 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

AN ONGOING COMPLEX OF THUNDERSTORMS WILL CONTINUE TO TRACK FROM
SOUTHWEST IOWA INTO NORTHWEST AND NORTH CENTRAL MISSOURI THIS
AFTERNOON. THE STORMS WITHIN THIS COMPLEX HAVE SHOWN A WEAKENING
TREND...BUT STILL ARE CAPABLE PRODUCING GUSTY WINDS AND POSSIBLY PEA-
SIZED HAIL. A MODERATELY UNSTABLE AIRMASS AND INCREASING SURFACE
TEMPERATURES ACROSS NORTHWEST MISSOURI AND NORTHEAST KANSAS WILL
CONTINUE TO SUSTAIN THE COMPLEX...AND MAY ALLOW FOR ADDITIONAL
DEVELOPMENT FURTHER WESTWARD INTO NORTHEAST KANSAS...THOUGH
DEVELOPMENT WILL BE HAMPERED BY WARMER TEMPERATURES IN THE MID-LEVELS
OF THE ATMOSPHERE AS THE COMPLEX MOVES SOUTHWARD. IT IS POSSIBLE THAT
THE COMPLEX OF STORMS COULD HOLD TOGETHER AND IMPACT AREAS AS FAR
SOUTH AS THE INTERSTATE 70 CORRIDOR BY THE MID- TO LATE AFTERNOON
HOURS. CURRENT THINKING IS THAT IN GENERAL STORMS WILL REMAIN
BELOW SEVERE LIMITS...BUT AN ISOLATED SEVERE STORM IS NOT OUT OF THE
QUESTION...WITH THE MAIN THREAT BEING FROM DAMAGING WINDS.

LATER TONIGHT...ANOTHER COMPLEX OF STORMS IS EXPECTED TO DEVELOP ACROSS
NEBRASKA AND IOWA AND MAY MOVE INTO THE AREA FROM THE NORTH. THIS
COMPLEX WOULD LIKELY AFFECT AREAS OF NORTH OF HIGHWAY 36 DURING THE
LATE EVENING HOURS BEFORE MOVING SOUTHWARD TOWARD THE MISSOURI
RIVER VALLEY AFTER MIDNIGHT. THE MAIN HAZARD FROM THIS COMPLEX OF
STORMS WOULD BE FROM HIGH WINDS BUT LARGE HAIL WOULD BE POSSIBLE
INITIALLY IN THE MORE ROBUST THUNDERSTORM UPDRAFTS. AS THE COMPLEX
SLIDES SOUTHWARD IT IS LIKELY THAT A TRANSITION TO MORE OF HEAVY RAIN
EVENT...ALTHOUGH STRONG WINDS WOULD STILL BE POSSIBLE.

HEAT INDEX VALUES MAY REACH THE LOW 100S ACROSS EAST CENTRAL KANSAS
AND CENTRAL MISSOURI THIS AFTERNOON. INCREASING CLOUD COVER
LATER THIS AFTERNOON...WILL LESSEN THE HEAT THREAT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A FRONTAL BOUNDARY WILL MOVE INTO THE AREA TONIGHT WHICH WILL ACT AS
A TRIGGER FOR THUNDERSTORMS THROUGH THE WEEKEND. WHILE DEPENDENT UPON
HOW MUCH CLOUD COVER IS LEFT OVER FROM THE THUNDERSTORM COMPLEX
FRIDAY MORNING...IF THERE IS ENOUGH RECOVERY IN INSTABILITY...SHEAR
IS STRONG ENOUGH TO PRODUCE A FEW SEVERE THUNDERSTORMS BY FRIDAY
EVENING. THE MAIN HAZARDS FROM THESE STORMS WOULD LARGE HAIL AND
DAMAGING WINDS. BY SATURDAY...THE PATTERN BECOMES TO MURKY TO
DETERMINE WHETHER SEVERE STORMS ARE POSSIBLE.

HEAT INDEX VALUES MAY ALSO REACH INTO THE LOWER 100S FRIDAY
AFTERNOON SOUTH OF THE FRONTAL BOUNDARY. THESE HIGH READINGS WILL BE
DEPENDENT UPON HOW MUCH RESIDUAL CLOUD COVER REMAINS DURING THE PEAK
HEATING OF THE AFTERNOON. IF CLOUDS LINGER INTO THE AFTERNOON
HOURS...THESE HIGH HEAT INDEX VALUES WILL NOT BE REALIZED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND AGAIN DURING
THE OVERNIGHT HOURS.

24

In the hours before

Special weather statement, Jul 10, 3:11 AM CDT, 1 hour 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
311 AM CDT FRI JUL 10 2009

MOZ002-011-012-100845-
ANDREW-HOLT-NODAWAY-
311 AM CDT FRI JUL 10 2009

...SIGNIFICANT WEATHER ALERT FOR ANDREW...HOLT AND SOUTHERN NODAWAY
COUNTIES UNTIL 345 AM CDT...

AT 306 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF
CRAIG TO OREGON...MOVING EAST AT 30 MPH.

PENNY SIZE HAIL...AND WINDS UP TO 50 MPH ARE POSSIBLE WITH THESE
STORMS. THESE STORMS WILL ALSO PRODUCE VERY HEAVY RAINFALL.

THESE STORMS WILL BE NEAR...
  MOUND CITY AROUND 320 AM CDT.
  FILLMORE AROUND 330 AM CDT.
  SAVANNAH AROUND 335 AM CDT.
  MAITLAND AROUND 340 AM CDT.

THE TOWNS OF BIG LAKE...FORTESCUE...BIGELOW AND GRAHAM ARE ALSO IN
THE PATH OF THESE STORMS.

LAT...LON 4023 9508 4008 9489 3993 9467 3990 9495
      3990 9500 3988 9504 3987 9511 3991 9515
      3991 9520 3993 9520 3993 9523 4001 9533
      4005 9542 4009 9539 4011 9540 4013 9543
      4016 9545

PC

Special weather statement, Jul 10, 3:26 AM CDT, 1 hour 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
326 AM CDT FRI JUL 10 2009

KSZ102-MOZ011-012-100900-
ANDREW-DONIPHAN-HOLT-
326 AM CDT FRI JUL 10 2009

...SIGNIFICANT WEATHER ALERT FOR NORTHERN DONIPHAN...SOUTHEASTERN
HOLT AND SOUTHWESTERN ANDREW COUNTIES UNTIL 400 AM CDT...

AT 324 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WHITE CLOUD...OR 8 MILES NORTHWEST OF
HIGHLAND...MOVING EAST AT 30 MPH.

PENNY SIZE HAIL...AND WINDS UP TO 50 MPH ARE POSSIBLE WITH THIS
STORM. VERY HEAVY RAINFALL WILL ALSO BE OCCURRING ALONG WITH
FREQUENT LIGHTNING.

THIS STORM WILL BE NEAR...
  WHITE CLOUD AND HIGHLAND AROUND 330 AM CDT.
  FOREST CITY AROUND 340 AM CDT.
  OREGON AROUND 345 AM CDT.
  FILLMORE AROUND 400 AM CDT.

THE TOWN OF IOWA POINT IS ALSO IN THE PATH OF THIS STORM.

LAT...LON 3999 9533 4000 9531 4001 9533 4005 9489
      3983 9490 3985 9534

PC

Special weather statement, Jul 10, 3:46 AM CDT, 43 minutes before

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Local storm report, Jul 10, 3:56 AM CDT, 33 minutes before

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Local storm report, Jul 10, 4:26 AM CDT, 3 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
Jul 10, 3:11 AM CDT	Special Weather Statement	EAX	Andrew, Holt	34 min
Jul 10, 3:46 AM CDT	Special Weather Statement	EAX	Ray	29 min
Jul 10, 3:51 AM CDT	Severe Thunderstorm Warning	EAX	Andrew, Buchanan, Holt	39 min
Jul 10, 4:57 AM CDT	Severe Thunderstorm Warning	EAX	Caldwell, Carroll, Livingston, Ray	30 min
Jul 10, 5:20 AM CDT	Special Weather Statement	EAX	Ray	25 min
Jul 10, 5:38 AM CDT	Severe Thunderstorm Warning	EAX	Carroll, Johnson, Lafayette, Pettis, Ray, Saline	37 min
Jul 10, 6:45 AM CDT	Special Weather Statement	EAX	Pettis	30 min
Jul 10, 7:46 AM CDT	Special Weather Statement	EAX	Pettis	29 min
Jul 10, 9:44 AM CDT	River Flood Warning	EAX	Ray	33 hr
Jul 10, 11:19 AM CDT	Special Weather Statement	EAX	Schuyler	26 min
Jul 10, 2:51 PM CDT	River Flood Warning	EAX	Cooper, Saline	36 hr
Jul 10, 3:26 AM CDT	Special Weather Statement	EAX	Doniphan	34 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2009 Every severe thunderstorm warning 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.