Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 20, NWS Springfield, MO

February 29, 2012Dent County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Feb 29, 2012, 1:43 AM CST for Dent 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: Feb 29, 2012, 1:43 AM CST (07:43 UTC)
Expired: Feb 29, 2012, 2:15 AM CST
In force: 32 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 0.88 in
Wind: 70.0 mph

County Dent County, MO

The radar

The St Louis radar (KLSX), 127 km from the middle of the area, began a volume at 07:46 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Feb 28, 10:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 7.7 hours before the alert went out and 237 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: 75 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 482 m²/s²
0-3 km storm-relative helicity: 563 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

023 
WUUS53 KSGF 290743
SVRSGF
MOC065-290815-
/O.NEW.KSGF.SV.W.0020.120229T0743Z-120229T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
143 AM CST WED FEB 29 2012

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DENT COUNTY IN SOUTH CENTRAL MISSOURI...

* UNTIL 215 AM CST.

* AT 142 AM CST...LOCAL LAW ENFORCEMENT REPORTED SEVERE THUNDERSTORMS
  ALONG A LINE EXTENDING FROM 5 MILES NORTH OF SLIGO TO SALEM...
  MOVING EAST AT 65 MPH. THESE STORMS ARE CAPABLE OF PRODUCING NICKEL
  SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* LOCATIONS IMPACTED INCLUDE BANGERT...BOSS...HOWES MILL...HOWES...
  SALEM...SLIGO AND STONE HILL.

THIS REPLACES THE TORNADO WARNING THAT WAS PREVIOUSLY IN EFFECT FOR 
DENT COUNTY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS CAPABLE OF PRODUCING LARGE HAIL AND
DAMAGING WINDS...IF YOU ARE IN THEIR PATH SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTHERN MISSOURI.

&&

LAT...LON 3758 9117 3759 9130 3757 9131 3759 9172
      3780 9152 3779 9131 3778 9130 3771 9130
      3771 9115 3770 9114 3759 9115
TIME...MOT...LOC 0743Z 263DEG 56KT 3785 9134 3762 9155
WIND...HAIL 70MPH 0.88IN

$$

BOXELL

2 follow-up statements

768 
WWUS53 KSGF 290801
SVSSGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
201 AM CST WED FEB 29 2012

MOC065-290815-
/O.CON.KSGF.SV.W.0020.000000T0000Z-120229T0815Z/
DENT MO-
201 AM CST WED FEB 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM CST
FOR NORTHEASTERN DENT COUNTY...

AT 200 AM CST...TRAINED WEATHER SPOTTERS REPORTED SEVERE
THUNDERSTORMS ALONG A LINE EXTENDING FROM 19 MILES NORTHEAST OF BOSS
TO BOSS...MOVING EAST AT 65 MPH. THESE STORMS ARE CAPABLE OF
PRODUCING NICKEL SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70
MPH.

LOCATIONS IMPACTED INCLUDE BOSS...HOWES MILL AND STONE HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTHERN MISSOURI.

&&

LAT...LON 3758 9117 3759 9130 3757 9131 3759 9153
      3779 9135 3779 9131 3778 9130 3771 9130
      3771 9115 3770 9114 3759 9115
TIME...MOT...LOC 0802Z 263DEG 56KT 3788 9097 3765 9118
WIND...HAIL 70MPH 0.88IN

$$

BOXELL

991 
WWUS53 KSGF 290813
SVSSGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
213 AM CST WED FEB 29 2012

MOC065-290823-
/O.EXP.KSGF.SV.W.0020.000000T0000Z-120229T0815Z/
DENT MO-
213 AM CST WED FEB 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DENT COUNTY WILL
EXPIRE AT 215 AM CST...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE SEVERE
THUNDERSTORMS THAT PROMPTED THE WARNING ARE EXITING THE WARNED
AREA...THUS THE WARNING IS BEING ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST WEDNESDAY MORNING
FOR SOUTHERN MISSOURI.

LAT...LON 3758 9117 3759 9130 3757 9131 3759 9153
      3779 9135 3779 9131 3778 9130 3771 9130
      3771 9115 3770 9114 3759 9115
TIME...MOT...LOC 0813Z 263DEG 56KT 3789 9075 3767 9097

$$

BOXELL

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 Springfield, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 29, 12:58 AM CST, 45 minutes earlier.

Area forecast discussion, Feb 29, 12:58 AM CST, 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1258 AM CST WED FEB 29 2012

...MESOSCALE CONVECTIVE DISCUSSION...

.DISCUSSION...
/ISSUED 1258 AM CST WED FEB 29 2012/

DANGEROUS LINE OF STORMS WILL RACE THROUGH THE AREA THROUGH 5 AM.

NUMEROUS REPORTS OF WIND GUSTS IN EXCESS OF 70 MPH...HAIL TO THE
SIZE OF GOLF BALLS AND TORNADOES HAVE BEEN RECEIVED. THE THREAT
FOR SIGNIFICANT SEVERE WILL CONTINUE THROUGH THE ENTIRE OUTLOOK
AREA WITH THIS LINE OF THUNDERSTORMS.

REFERENCING SPC/S MESOANALYST PAGE...MLCAPE IS NEAR 1000 J/KG WITH
0-1KM AND 0-3KM STORM RELATIVE HELICITY NEAR 750 M2/S2. GIVEN
925MB WINDS OF 50KT AND 850MB WINDS OF 70KT (AS MEASURED BY THE
04Z SPECIAL KSGF SOUNDING)...THE SRH VALUES PRODUCED ARE LIKELY
REPRESENTATIVE. RUC REPRESENTATION OF LOW LEVEL CAPE ESTIMATES
VALUES ARE 100 J/KG. THIS COMBINED WITH THE HIGH SRH VALUES IN THE
LOW LEVELS WILL MAINTAIN AN ELEVATED TORNADO RISK WITH THE BOW
ECHO SIGNATURE THAT IS MOVING EAST NORTHEAST THROUGH CENTRAL
MISSOURI AS WELL AS ANY OTHER LINE SEGMENTS THAT BECOME FAVORABLY
ORIENTED WITH THE WEST/SOUTHWEST 0-3KM SHEAR VECTORS.

WINDS IN EXCESS OF 70 MPH...TORNADOES AND LARGE HAIL WILL REMAIN
AN ELEVATED TO SIGNIFICANT RISK FOR THE REST OF TONIGHT WITH THIS
LINE OF STORMS. THIS IS A DANGEROUS SITUATION.

GAGAN

&&

.AVIATION...

FOR THE 06Z TAF PACKAGE...PRIMARY CONCERN WILL BE THE LINE OF
THUNDERSTORMS MOVING ACROSS THE REGION...EXPECT GUSTS AT BBG TO
PEAK NEAR 50KT OUT OF THE WEST. ONCE THIS LINE CLEARS TO THE
EAST...VFR CONDITIONS ARE EXPECTED...THOUGH GUSTY WEST WINDS WILL
CONTINUE THROUGH THE DAY.

GAGAN

&&

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

Hazardous weather outlook, Feb 29, 12:39 AM CST, 1 hour 4 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1239 AM CST WED FEB 29 2012

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-010645-
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-
1239 AM CST WED FEB 29 2012

...SEVERE THUNDERSTORMS WILL RACE THROUGH THE MISSOURI OZARKS
THROUGH 5 AM...

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

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED...

  ELEVATED TORNADO RISK.
  ELEVATED HAIL RISK.
  SIGNIFICANT THUNDERSTORM WIND DAMAGE RISK.
  SIGNIFICANT LIGHTNING RISK.
  LIMITED NON THUNDERSTORM WIND RISK.

DISCUSSION...

 A BROKEN LINE OF THUNDERSTORMS WITH A HISTORY OF PRODUCING
 DAMAGING WIND GUSTS IN EXCESS OF 70 MPH...HAIL TO THE SIZE OF
 GOLF BALLS AND SEVERAL REPORTS OF DAMAGING TORNADOES WILL MOVE
 EAST ACROSS THE MISSOURI OZARKS THROUGH 5 AM. ALL AREAS ALONG AND
 SOUTHEAST OF A LINE FROM THE LAKE OF THE OZARKS...TO
 SPRINGFIELD...TO PINEVILLE WILL BE PRONE TO OBSERVING SEVERE
 WEATHER AS THE LINE OF STORMS MOVES THROUGH THE REGION. THIS IS
 A DANGEROUS SITUATION WITH MULTIPLE REPORTS OF WIND DAMAGE
 RECEIVED ACROSS THE REGION.

 BEHIND THIS LINE OF THUNDERSTORMS...WEST WINDS WILL OCCASIONALLY
 GUST TO 35 MPH.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

  GUSTY WEST TO SOUTHWEST WINDS AND DRY CONDITIONS ARE EXPECTED
  ON WEDNESDAY...RESULTING IN AN ELEVATED FIRE WEATHER RISK.

  THUNDERSTORMS WILL BE POSSIBLE FRIDAY AS THE NEXT STORM
  SYSTEM MOVES THROUGH THE REGION.

.SPOTTER INFORMATION STATEMENT...

 SPOTTER ACTIVATION WILL BE NEEDED IN THE NEXT THREE HOURS FOR
AREAS ALONG AND EAST OF A LINE FROM THE LAKE OF THE OZARKS...TO
SPRINGFIELD...TO PINEVILLE.

&&

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)

GAGAN

In the hours before

Local storm report, Feb 29, 12:59 AM CST, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1259 AM CST WED FEB 29 2012

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

1259 AM     TSTM WND GST     4 N FORDLAND            37.22N 92.94W
02/29/2012  M75 MPH          WEBSTER            MO   AMATEUR RADIO

&&

MGRIFFIN

Local storm report, Feb 29, 1:07 AM CST, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
107 AM CST WED FEB 29 2012

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

1240 AM     TSTM WND DMG     2 NNW CASSVILLE         36.70N 93.88W
02/29/2012                   BARRY              MO   EMERGENCY MNGR

            TREE DOWN...TRAILER ROLLED AND DAMAGED TO HOUSES OFF HWY
            37 JUST NORTH OF CASSVILLE...POSSIBLE TORNADO

&&

MGRIFFIN

Local storm report, Feb 29, 1:10 AM CST, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
110 AM CST WED FEB 29 2012

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

1248 AM     TSTM WND GST     NIXA                    37.04N 93.29W
02/29/2012  M61 MPH          CHRISTIAN          MO   PUBLIC

&&

MGRIFFIN

Local storm report, Feb 29, 1:31 AM CST, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
131 AM CST WED FEB 29 2012

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

0130 AM     TSTM WND DMG     BRANSON                 36.64N 93.22W
02/29/2012                   TANEY              MO   PUBLIC

            ROOF BLOWN OFF GAS STATION DOWNTOWN BRANSON POSSIBLE
            TORNADO DAMAGE

&&

MGRIFFIN

Local storm report, Feb 29, 1:36 AM CST, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
136 AM CST WED FEB 29 2012

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

0123 AM     TORNADO          BRANSON                 36.64N 93.22W
02/29/2012                   TANEY              MO   EMERGENCY MNGR

            MULTIPLE TREES REPORTED DOWN. GAS STATION REPORTED
            DAMAGED. MULTIPLE SERVICE POLES REPORTED DOWN.

&&

JCOLUCCI

Local storm report, Feb 29, 1:39 AM CST, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
139 AM CST WED FEB 29 2012

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

0124 AM     TORNADO          BRANSON                 36.64N 93.22W
02/29/2012                   TANEY              MO   TRAINED SPOTTER

            CAPRI MOTOR INN DAMAGED. WALL OF RESTAURANT DOWN. SIGN
            DOWN. HIGHWWAY PATROL REPORTS POWERLINES DOWN ACROSS
            HIGHWAY.

&&

JCOLUCCI

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 10:21 PM CST	Severe Thunderstorm Warning	SGF	Barton, Jasper	54 min
Feb 28, 10:48 PM CST	Tornado Warning	SGF	Barton	27 min
Feb 28, 10:59 PM CST	Severe Thunderstorm Warning	SGF	Barton, Cedar, Dade, Jasper, Lawrence, Vernon	31 min
Feb 28, 11:07 PM CST	Tornado Warning	SGF	Barton, Dade	38 min
Feb 28, 11:18 PM CST	Tornado Warning	SGF	Barton, Cedar, Dade, Vernon	27 min
Feb 28, 11:29 PM CST	Tornado Warning	SGF	Dade, Greene, Polk	31 min
Feb 28, 11:33 PM CST	Severe Thunderstorm Warning	SGF	Jasper, Newton	42 min
Feb 28, 11:44 PM CST	Severe Thunderstorm Warning	SGF	Camden, Cedar, Dallas, Hickory, Polk, St. Clair	46 min
Feb 28, 11:54 PM CST	Tornado Warning	SGF	Dallas, Laclede, Polk, Webster	51 min
Feb 28, 11:58 PM CST	Severe Thunderstorm Warning	SGF	McDonald, Newton	32 min
Feb 29, 12:05 AM CST	Severe Thunderstorm Warning	SGF	Lawrence	25 min
Feb 29, 12:19 AM CST	Tornado Warning	SGF	Barry, McDonald	56 min
Feb 29, 12:21 AM CST	Severe Thunderstorm Warning	SGF	Greene	24 min
Feb 29, 12:31 AM CST	Tornado Warning	SGF	Laclede, Phelps, Pulaski	44 min
Feb 29, 12:33 AM CST	Special Weather Statement	SGF	Camden, Maries, Miller	27 min
Feb 29, 12:35 AM CST	Severe Thunderstorm Warning	SGF	Christian, Stone	40 min
Feb 29, 12:43 AM CST	Severe Thunderstorm Warning	SGF	Webster, Wright	47 min
Feb 29, 12:53 AM CST	Severe Thunderstorm Warning	SGF	Laclede, Texas, Wright	67 min
Feb 29, 12:58 AM CST	Tornado Warning	SGF	Stone, Taney	47 min
Feb 29, 1:02 AM CST	Severe Thunderstorm Warning	SGF	Douglas	58 min
Feb 29, 1:06 AM CST	Tornado Warning	SGF	Dent, Phelps	39 min
Feb 29, 1:25 AM CST	Severe Thunderstorm Warning	SGF	Texas, Wright	65 min
Feb 29, 1:33 AM CST	Severe Thunderstorm Warning	SGF	Dent, Shannon, Texas	57 min
Feb 29, 1:36 AM CST	Tornado Warning	SGF	Ozark	54 min
Feb 29, 1:51 AM CST	Tornado Warning	SGF	Douglas	39 min
Feb 29, 2:06 AM CST	Tornado Warning	SGF	Howell	39 min
Feb 29, 2:24 AM CST	Tornado Warning	SGF	Oregon, Shannon	43 min
Feb 29, 2:26 AM CST	Severe Thunderstorm Warning	SGF	Howell, Oregon, Ozark	64 min
Feb 29, 3:21 AM CST	Severe Thunderstorm Warning	SGF	Howell	17 min
Feb 29, 3:51 AM CST	Severe Thunderstorm Warning	SGF	Oregon	28 min
Feb 29, 4:33 AM CST	Red Flag Warning	SGF	Barton, Jasper, Newton, Vernon	13 hr
Feb 29, 3:43 PM CST	Fire Weather Watch	SGF	Barton, Jasper, McDonald, Newton, Vernon	12 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.