Alert archive / Missouri / Special Weather Statements in 2011

Special Weather Statement, NWS Springfield, MO

June 18, 2011Benton County, Missouri

NWS Springfield, MO issued this special weather statement at Jun 18, 2011, 3:34 AM CDT for Benton County, Missouri. It was in force for 26 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: Jun 18, 2011, 3:34 AM CDT (08:34 UTC)
Expired: Jun 18, 2011, 4:00 AM CDT
In force: 26 min
Issued by: NWS Springfield, MO

County Benton County, MO

The radar

The Pleasant Hill radar (KEAX), 101 km from the middle of the area, began a volume at 08:37 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, 8.6 hours before the alert went out and 164 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: 3544 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1159 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 8.5

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 Springfield, MO wrote its last area forecast discussion before this special weather statement went out at Jun 18, 3:31 AM CDT, 3 minutes earlier.

Area forecast discussion, Jun 18, 3:31 AM CDT, 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
331 AM CDT SAT JUN 18 2011

.DISCUSSION...

FOR THIS FORECAST...MAIN CONCERNS REVOLVE AROUND ONGOING
CONVECTION ACROSS CENTRAL MISSOURI ASSOCIATED WITH AN MCV...THE
POTENTIAL FOR A SIMILAR SYSTEM TONIGHT AND CHANCES FOR
THUNDERSTORMS AND POTENTIAL SEVERE WEATHER FOR THE MIDDLE OF THE
WEEK.

THUNDERSTORMS NOW ONGOING ACROSS CENTRAL PORTIONS OF MISSOURI WILL
MOVE LIKELY BEGIN TO DEVELOP TO THE SOUTHEAST WHERE 700MB
TEMPERATURES FALL TO BELOW 14 DEGREES. FOR MUCH OF THE NIGHT THIS
CONVECTION HAS BEEN ALONG AND NORTH OF THIS LINE. WHILE THIS MAY
NOT BE THE PRIMARY FACTOR IN LIMITING STORM DEVELOPMENT TO THE
SOUTH OTHER FACTORS SUCH AS THE MCV...MUCAPE VALUES ABOVE
2000J/KG AND A 45KT LOW LEVEL JET NOSING INTO THE AREA WILL AT
LEAST KEEP THE STORMS ON AN EASTWARD TRACK WHICH WOULD EFFECT
CENTRAL MISSOURI. THIS MCS SHOULD DISSIPATE LATE THIS MORNING.
THERE IS A CHANCE THAT A SIMILAR MCS WILL DEVELOP ACROSS EASTERN
KANSAS AND IMPACT THE MISSOURI OZARKS AGAIN THIS EVENING AND
TONIGHT. THE PRIMARY THREATS WOULD BE GUSTY STRAIGHT LINE WINDS
AND SOME HAIL. A BRIEF SPIN UP ALSO CAN NOT BE RULED OUT.

THE UPPER LEVEL RIDGE AND 700MB THERMAL RIDGE IS EXPECTED TO
WEAKEN TODAY AS A WEAK UPPER LEVEL SHORT WAVE MOVES ACROSS THE TOP
OF THE RIDGE AND SUPPRESSES IT SOME. THE STORMS WOULD DIMINISH BY
EARLY SUNDAY MORNING AS THE RIDGE BEGINS TO REASSERTS ITSELF FOR
SUNDAY. THIS WOULD BRING A RETURN OF WARMER TEMPERATURES DURING
THE DAY SUNDAY. THIS ALSO WILL PLACE THE REGION UNDER MEAN
SOUTHWESTERLY FLOW...ALLOWING INCREASING MOISTURE TO FILTER INTO
THE AREA.

AS THIS OCCURS LATE SUNDAY AND INTO MONDAY AN UPPER LEVEL STORM
SYSTEM AND ASSOCIATED TROUGH WILL SWINGS INTO THE NORTHERN PLAINS.
AS THE SYSTEM CONTINUES TO MOVE TO THE EAST TUESDAY INTO WEDNESDAY
IT WILL BRING A COLD FRONT THROUGH THE REGION AND BRING THE NEXT
CHANCE FOR SEVERE WEATHER TO THE AREA. THE COMBINATION OF A WARM
AND MOIST AIRMASS AND THE FRONTAL FORCING WILL LIKELY BE ENOUGH
TO PRODUCE STRONG TO SEVERE THUNDERSTORM FOR MUCH OF THE MISSOURI
OZARKS AND EXTREME SOUTHEASTERN KANSAS.

THE COLD FRONT WILL PUSH SOUTH OF THE REGION EARLY WEDNESDAY
HOWEVER THE UPPER LEVEL LOW TAKES ITS TIME MOVING ACROSS THE
NORTHERN PLAINS INTO INTO THE GREAT LAKES REGION INTO THE END OF
THE WEEK. THIS WILL ALLOW THE UPPER LEVEL PATTERN TO SHIFT INTO A
MORE NORTHWESTERN FLOW FOR THE END OF NEXT WEEK AND FOR NEXT
WEEKEND THOUGH IT MAY BE SHORT LIVED AS ANOTHER UPPER LEVEL TROUGH
DIGS INTO THE WEST COAST.

IN GENERAL...IT APPEARS THE AREA WILL BE IN FOR A PERIOD OF ACTIVE
WEATHER FOR THIS WEEKEND AND THE COMING WEEK.

HATCH

&&

.AVIATION...
/ISSUED 1240 AM CDT SAT JUN 18 2011/

FOR THE 06Z TAF PACKAGE...PRIMARY FORECAST CHALLENGE FOR THE NEXT
6 TO 9 HOURS WILL BE THE EVOLUTION OF THUNDERSTORMS ALONG A WARM
FRONT ACROSS EAST CENTRAL KS INTO CENTRAL MO. THE BULK OF THIS
ACTIVITY...AT THIS POINT...LOOKS AS THOUGH IT WILL REMAIN TO THE
NORTH OF JLN/SGF/BBG. HOWEVER...IT IS PLAUSIBLE THAT THIS ACTIVITY
TURNS A BIT TO THE SOUTHEAST WITH TIME...ESPECIALLY AFTER 09Z.
HAVE HANDLED WITH CB AND VCTS FOR THE TIME BEING...BUT WILL UPDATE
IF CONFIDENCE IN OCCURRENCE INCREASES. OTHERWISE EXPECT VFR
CONDITIONS THROUGH MUCH OF SATURDAY INTO SATURDAY EVENING. YET
ANOTHER COMPLEX TSRA IS EXPECTED TO DEVELOP ACROSS EASTERN KS LATE
THIS AFTERNOON AND EVENING AND HAS THE POTENTIAL TO AFFECT THE TAF
SITES THIS EVENING.

GAGAN

&&

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

Hazardous weather outlook, Jun 18, 12:20 AM CDT, 3 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1220 AM CDT SAT JUN 18 2011

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-181200-
BOURBON-CRAWFORD-CHEROKEE-BENTON-MORGAN-MILLER-MARIES-VERNON-
ST. CLAIR-HICKORY-CAMDEN-PULASKI-PHELPS-BARTON-CEDAR-POLK-DALLAS-
LACLEDE-TEXAS-DENT-JASPER-DADE-GREENE-WEBSTER-WRIGHT-NEWTON-
LAWRENCE-CHRISTIAN-DOUGLAS-HOWELL-SHANNON-MCDONALD-BARRY-STONE-
TANEY-OZARK-OREGON-
1220 AM CDT SAT JUN 18 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE MISSOURI
OZARKS AND EXTREME SOUTHEAST KANSAS.

.DAY ONE...TONIGHT.

THE HAZARDOUS WEATHER RISK LEVEL IS...SIGNIFICANT.

WEATHER HAZARDS EXPECTED...

ELEVATED TO SIGNIFICANT DAMAGING THUNDERSTORM WIND RISK.
ELEVATED LARGE HAIL RISK.
LIMITED TORNADO RISK.
ELEVATED LIGHTNING RISK.

DISCUSSION...

A COMPLEX OF THUNDERSTORMS CONTINUES TO ORGANIZE ACROSS CENTRAL
KANSAS. THESE THUNDERSTORMS WILL ARRIVE IN EXTREME SOUTHEAST
KANSAS AROUND OR AFTER 1 AM...WITH A STEADY PROGRESSION OF STORMS
TO THE EAST SOUTHEAST INTO PORTIONS OF CENTRAL AND SOUTHWEST
MISSOURI AFFECTING AREAS ALONG AND NORTH OF THE HIGHWAY 60
CORRIDOR.

THE PRIMARY SEVERE WEATHER RISKS WILL BE DAMAGING WIND GUSTS TO
70 MPH AND HAIL TO THE SIZE OF QUARTERS. A TORNADO OR TWO CANNOT
BE RULED OUT...HOWEVER THE OVERALL RISK IS LOW.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SEVERE THUNDERSTORMS WILL BE POSSIBLE LATE SATURDAY AFTERNOON
THROUGH SATURDAY NIGHT MAINLY ACROSS EXTREME SOUTHEAST KANSAS
INTO CENTRAL AND SOUTH CENTRAL MISSOURI WITH LARGE HAIL AND
DAMAGING WINDS ONCE AGAIN BEING THE PRIMARY THREATS. ISOLATED
TORNADOES MAY ALSO BE POSSIBLE.

AFTERNOON HEAT INDEX VALUES FROM THE MID 90S TO AROUND
100 DEGREES WILL BE POSSIBLE SATURDAY AND SUNDAY.

NON THUNDERSTORM WIND GUSTS UP TO 30 MPH WILL BE POSSIBLE AGAIN
ON MONDAY ACROSS WESTERN MISSOURI AND EXTREME SOUTHEAST KANSAS.

THUNDERSTORMS WILL AGAIN BE LIKELY FROM MONDAY NIGHT THROUGH
WEDNESDAY AS A FRONT MOVES INTO THE REGION. SEVERE WEATHER CAN
NOT BE RULED OUT WITH THESE THUNDERSTORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED OVERNIGHT FOR AREAS
ALONG AND NORTH OF THE HIGHWAY 60 CORRIDOR AND WEST OF THE HIGHWAY
65 CORRIDOR. SPOTTER ACTIVATION ACROSS THE REST OF THE MISSOURI
OZARKS WILL BE POSSIBLE OVERNIGHT.

&&

THIS PRODUCT IS NOW AVAILABLE IN GRAPHICAL FORMAT...ALONG WITH
OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION...AT
HTTP://WWW.CRH.NOAA.GOV/SGF(ALL LOWERCASE)

SCHAUMANN

In the hours before

Special weather statement, Jun 18, 1:22 AM CDT, 2 hours 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
122 AM CDT SAT JUN 18 2011

KSZ073-180700-
BOURBON KS-
122 AM CDT SAT JUN 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR BOURBON COUNTY UNTIL 200 AM
CDT...

AT 118 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES NORTH OF
XENIA TO 3 MILES WEST OF BRONSON...MOVING EAST AT 35 MPH. NICKEL SIZE
HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE BRONSON...DEVON...FORT SCOTT...FULTON...
HAMMOND...HARDING...MAPLETON...MARMATON...PETERSBURG...REDFIELD...
UNIONTOWN AND XENIA.

PEOPLE IN BOURBON COUNTY...INCLUDING BRONSON...UNIONTOWN...
REDFIELD...FULTON AND FORT SCOTT...SHOULD MONITOR THE WEATHER
SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO
TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT
SATURDAY MORNING FOR SOUTHEAST KANSAS AND SOUTHWESTERN MISSOURI.

LAT...LON 3805 9508 3805 9505 3804 9462 3775 9462
      3774 9462 3778 9508 3804 9509
TIME...MOT...LOC 0622Z 281DEG 29KT 3814 9500 3788 9510

SCHAUMANN

Local storm report, Jun 18, 3:31 AM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
331 AM CDT SAT JUN 18 2011

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

0331 AM     TSTM WND GST     WARSAW                  38.24N 93.38W
06/18/2011  E50 MPH          BENTON             MO   LAW ENFORCEMENT

&&

HATCH

Special weather statement, Jun 18, 3:34 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
334 AM CDT SAT JUN 18 2011

MOZ055-180900-
BENTON MO-
334 AM CDT SAT JUN 18 2011

...SIGNIFICANT WEATHER ADVISORY FOR BENTON COUNTY UNTIL 400 AM CDT...

AT 333 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 3 MILES NORTHEAST OF
CROCKERVILLE TO 7 MILES SOUTHWEST OF FRISTOE...MOVING EAST AT 40 MPH.
PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THESE
STORMS.

LOCATIONS IMPACTED INCLUDE BRANDON...COLE CAMP...CROCKERVILLE...
EDMONSON...EDWARDS...FRISTOE...HASTAIN...IONIA...KNOBBY...LAKEVIEW
HEIGHTS...LINCOLN...MORA...PALO PINTO...RACKET...WARSAW...
WHITAKERVILLE AND ZORA.

OTHER LOCATIONS IN THIS SIGNIFICANT WEATHER ADVISORY INCLUDE LAKE OF
THE OZARKS AND TRUMAN LAKE.

PEOPLE IN BENTON COUNTY...INCLUDING LAKE OF THE OZARKS...SHOULD
MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS
AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER
THREATEN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM CDT
SATURDAY MORNING FOR SOUTHERN MISSOURI.

LAT...LON 3851 9308 3844 9307 3819 9308 3819 9306
      3807 9307 3807 9350 3820 9349 3821 9353
      3822 9353 3828 9352 3852 9351 3851 9330
      3854 9328
TIME...MOT...LOC 0834Z 291DEG 36KT 3848 9306 3805 9337

SCHAUMANN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 2:30 AM CDT	Severe Thunderstorm Warning	SGF	Benton	60 min
Jun 18, 2:51 AM CDT	Severe Thunderstorm Warning	SGF	Camden, Morgan	54 min
Jun 18, 3:42 AM CDT	Special Weather Statement	SGF	Maries, Miller, Morgan	63 min
Jun 18, 3:53 AM CDT	Special Weather Statement	SGF	Camden, Hickory	37 min
Jun 18, 4:03 AM CDT	Severe Thunderstorm Warning	SGF	Benton, Camden, Hickory	42 min
Jun 18, 4:56 AM CDT	Special Weather Statement	SGF	Laclede	34 min
Jun 18, 5:59 AM CDT	Severe Thunderstorm Warning	SGF	St. Clair, Vernon	40 min
Jun 18, 1:22 AM CDT	Special Weather Statement	SGF	Bourbon	38 min

Nearby

Special Weather Statements in Missouri, 2011 Every special weather statement in 2011

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.