Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS Springfield, MO

April 27, 2012Vernon County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Apr 27, 2012, 9:04 PM CDT for Vernon County, Missouri. It was in force for 20 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 27, 2012, 9:04 PM CDT (02:04 UTC)
Expired: Apr 27, 2012, 9:24 PM CDT
In force: 20 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Vernon County, MO

The radar

The Pleasant Hill radar (KEAX), 101 km from the middle of the area, began a volume at 02:05 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.

What was reported inside it

Time	Report	Where	Remark
Apr 27, 9:08 PM CDT	HAIL 0.75	Nevada, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.1 hours before the alert went out and 119 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: 752 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 558 m²/s²
0-3 km storm-relative helicity: 691 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

996 
WUUS53 KSGF 280204
SVRSGF
MOC217-280245-
/O.NEW.KSGF.SV.W.0075.120428T0204Z-120428T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
904 PM CDT FRI APR 27 2012

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  VERNON COUNTY IN WEST CENTRAL MISSOURI...

* UNTIL 945 PM CDT

* AT 902 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR NEVADA...AND
  MOVING NORTHEAST AT 30 MPH.

  HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.

  SOURCE...RADAR INDICATED.

  IMPACT...MINOR DAMAGE TO VEHICLES...ROOFS AND WINDOWS. MINOR TREE
           DAMAGE...WITH LIMBS UP TO ONE INCH IN DIAMETER BROKEN.

* LOCATIONS IMPACTED INCLUDE...
  NEVADA...WALKER...SCHELL CITY AND HARWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3790 9442 3806 9429 3804 9422 3806 9421
      3805 9419 3806 9413 3804 9406 3780 9407
      3775 9416 3773 9427 3773 9437 3775 9444
      3780 9446
TIME...MOT...LOC 0205Z 231DEG 25KT 3780 9433

HAIL...1.00IN
WIND...60 MPH

$$

CRAMER

1 follow-up statement

396 
WWUS53 KSGF 280224
SVSSGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
924 PM CDT FRI APR 27 2012

MOC217-280234-
/O.CAN.KSGF.SV.W.0075.000000T0000Z-120428T0245Z/
VERNON MO-
924 PM CDT FRI APR 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR VERNON COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 3790 9442 3806 9429 3804 9422 3806 9421
      3805 9419 3806 9413 3804 9406 3780 9407
      3775 9416 3773 9427 3773 9437 3775 9444
      3780 9446
TIME...MOT...LOC 0224Z 231DEG 25KT 3788 9420

$$

CRAMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 9:36 PM CDT	Severe Thunderstorm Warning	SGF	Cedar, St. Clair	39 min
Apr 27, 10:14 PM CDT	Severe Thunderstorm Warning	SGF	Benton, Hickory, St. Clair	15 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.