Alert archive / Missouri / Heat Advisories in 2009

Heat Advisory 2, NWS Kansas City, MO

June 25, 200918 counties in Missouri

NWS Kansas City, MO issued this heat advisory at Jun 25, 2009, 3:39 AM CDT for 18 counties in Missouri. It took effect at Jun 26, 2009, 1:00 PM CDT. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued
Jun 25, 2009, 3:39 AM CDT (08:39 UTC)
In effect from
Jun 26, 2009, 1:00 PM CDT
Expired
Jun 27, 2009, 7:00 PM CDT
In force
30 hr
Issued by
NWS Kansas City, MO

Counties Andrew County, MO, Atchison County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Holt County, MO, Howard County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Nodaway County, MO, Pettis County, MO, Randolph County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 107 km from the middle of the area, began a volume at 08:38 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

Omaha, NE (KOAX), launched 00:00Z, 8.7 hours before the alert went out and 287 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, Omaha, NE at 00:00Z on 2009-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1702 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 2009-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
1702 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
251 m²/s²
Significant tornado parameter
1.2
Supercell composite
11.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat advisory 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 heat advisory went out at Jun 24, 11:59 PM CDT, 3 hours 40 minutes earlier.

Area forecast discussion, Jun 24, 11:59 PM CDT, 3 hours 40 minutes before
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Hazardous weather outlook, Jun 24, 1:10 PM CDT, 14 hours 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
110 PM CDT WED JUN 24 2009

KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-251815-
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 WED JUN 24 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

HOT AND HUMID CONDITIONS WILL PREVAIL OVER MOST OF THE OUTLOOK AREA
THIS AFTERNOON. THE EXCEPTION WILL BE IN PORTIONS OF NORTH CENTRAL
MISSOURI WHERE CLOUD COVER AND PERSISTENT THUNDERSTORM DEVELOPMENT
WILL KEEP TEMPERATURES IN CHECK. OUTSIDE OF THIS AREA...AFTERNOON
TEMPERATURES WILL BE IN THE MIDDLE 90S WITH HEAT INDEX READINGS IN
THE 100 TO 110 DEGREE RANGE.

THUNDERSTORMS ARE EXPECTED TO PERSIST IN NORTH CENTRAL MISSOURI
MAINLY IN THE VICINITY OF HIGHWAY 63 THROUGH THE MID AFTERNOON
HOURS...WITH A GRADUAL EASTWARD PUSH OUT OF THE REGION. AT THIS
POINT...SEVERE WEATHER IS NOT EXPECTED...BUT WITH THE REPEATED ROUNDS
OF RAIN TODAY...MINOR FLOODING ISSUES WILL BE A CONCERN.

FOR THIS AFTERNOON AND INTO THIS EVENING...A THUNDERSTORM COMPLEX IS
EXPECTED TO BE MOVING OUT OF NEBRASKA INTO NORTHWEST MISSOURI AND
NORTHEAST KANSAS DURING THE AFTERNOON HOURS...MOVING TO THE SOUTH
SOUTHEAST. IT WILL HAVE THE POTENTIAL OF IMPACTING MARYVILLE...ST
JOSEPH...AND POSSIBLY AREAS FURTHER EAST NEAR THE IOWA BORDER SUCH
AS BETHANY. BY THE LATE AFTERNOON AND EARLY EVENING HOURS...THE STORMS
MAY MOVE SOUTHWARD POSSIBLY AFFECTING KANSAS CITY...PAOLA...
HARRISONVILLE...MOUND CITY KANSAS AND BUTLER MISSOURI. THE STORMS
MAY ALSO SPREAD FURTHER EAST NEAR THE IOWA BORDER...TO THE UNIONVILLE
OR TRENTON AREA.

AFTER MIDNIGHT...THE MAIN FOCUS FOR STORMS MAY BECOME A STORM COMPLEX
DROPPING SOUTHEAST ACROSS NORTHERN AND CENTRAL MISSOURI.

THE MAIN THREAT FROM THE STORMS THIS AFTERNOON AND TONIGHT WILL BE
DAMAGING WINDS ALONG WITH HAIL AND HEAVY RAIN...WHICH MAY RESULT IN
LOCALIZED FLOODING PROBLEMS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SIMILAR TO TODAY...THUNDERSTORMS MAY PERSIST ON THURSDAY IN NORTHERN
MISSOURI...ESPECIALLY IN NORTH CENTRAL AND NORTHEAST MISSOURI...WITH
A CONTINUED THREAT OF HEAVY RAIN AND STRONG WINDS. THIS WILL KEEP THE
HEAT FROM BEING A PROBLEM IN THOSE AREAS. THE HEAT MAY STILL BE A
FACTOR IN PORTIONS OF WEST CENTRAL MISSOURI AND ADJACENT AREAS OF
EASTERN KANSAS IF THE STORMS STAY EAST OF THE REGION IN THE MORNING.

HOT AND HUMID CONDITIONS ARE EXPECTED TO RETURN TO MUCH OF THE
OUTLOOK AREA ON FRIDAY AND SATURDAY...WITH AGAIN HEAT INDICIES
RANGING IN THE 100 TO 110 DEGREE RANGE.

A FRONT IS EXPECTED TO BE MOVING SOUTH ON SATURDAY NIGHT WITH THE
THREAT OF MORE STORMS. IT IS TOO SOON TO TELL IF SEVERE WEATHER MAY
OCCUR WITH THIS FRONT. THE STORMS MAY LINGER ON SUNDAY
MORNING...DEPENDING ON THE TIMING OF THE FRONT...AND THIS MAY HELP
WITH THE HEAT PROBLEMS FOR SUNDAY. IF THIS FRONT DOES MAKE IT SOUTH
THROUGH THE AREA...THIS SHOULD EASE THE EFFECTS OF THE HEAT FOR LATE
IN THE WEEKEND AND THE FIRST OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED LATER THIS AFTERNOON AND TONIGHT
DUE TO THUNDERSTORMS.

PC

In the hours before

Local storm report, Jun 24, 11:38 PM CDT, 4 hours 1 minute before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 7:09 PM CDTSpecial Weather StatementEAXBates36 min
Jun 24, 7:18 PM CDTSevere Thunderstorm WarningEAXCass, Jackson42 min
Jun 24, 7:43 PM CDTFlash Flood WarningEAXJackson3 hr
Jun 24, 8:31 PM CDTSpecial Weather StatementEAXBates44 min
Jun 25, 9:01 AM CDTSevere Thunderstorm WarningEAXClay, Jackson, Lafayette, Ray44 min
Jun 25, 9:34 AM CDTSpecial Weather StatementEAXLafayette26 min
Jun 25, 10:12 AM CDTSevere Thunderstorm WarningEAXHenry, Johnson33 min
Jun 25, 10:31 AM CDTSpecial Weather StatementEAXHenry29 min
Jun 24, 7:03 PM CDTSpecial Weather StatementEAXJohnson27 min
Jun 24, 7:26 PM CDTSpecial Weather StatementEAXMiami34 min
Jun 24, 7:31 PM CDTSpecial Weather StatementEAXJohnson29 min
Jun 24, 7:34 PM CDTSevere Thunderstorm WarningEAXJohnson, Miami41 min
Jun 24, 8:08 PM CDTSpecial Weather StatementEAXLinn22 min

Nearby

Heat Advisories in Missouri, 2009Every heat advisory 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.