Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 21, NWS Springfield, MO

March 26, 2011Howell County, Ozark County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Mar 26, 2011, 8:31 AM CDT for Howell County, Ozark County, Missouri. It was in force for 29 min. 2 reports 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: Mar 26, 2011, 8:31 AM CDT (13:31 UTC)
Expired: Mar 26, 2011, 9:00 AM CDT
In force: 29 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Howell County, MO, Ozark County, MO

The radar

The Springfield radar (KSGF), 122 km from the middle of the area, began a volume at 13:31 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
Mar 26, 8:31 AM CDT	HAIL 0.88	1 Ene Gainesville, MO	PUBLIC REPORTED NICKEL SIZED HAIL.
Mar 26, 8:35 AM CDT	HAIL 0.88	1 Ene Gainesville, MO	PUBLIC REPORTED NICKEL SIZED HAIL.

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 12:00Z, 1.5 hours before the alert went out and 144 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: 14 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 402 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

753 
WUUS53 KSGF 261331
SVRSGF
MOC091-153-261400-
/O.NEW.KSGF.SV.W.0021.110326T1331Z-110326T1400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
831 AM CDT SAT MAR 26 2011

THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN OZARK COUNTY IN SOUTHWEST MISSOURI...
  WEST CENTRAL HOWELL COUNTY IN SOUTH CENTRAL MISSOURI...

* UNTIL 900 AM CDT.

* AT 827 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTHWEST OF GAINESVILLE...OR 28 MILES
  SOUTH OF AVA...MOVING NORTHEAST AT 55 MPH. THIS STORM IS CAPABLE OF
  PRODUCING QUARTER SIZE HAIL.

* LOCATIONS IMPACTED INCLUDE CAULFIELD...GAINESVILLE...HARDENVILLE...
  POTTERSVILLE...SILOAM SPRINGS...SOUTH FORK...SYCAMORE...TECUMSEH...
  UDALL AND ZANONI.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM CAPABLE OF PRODUCING LARGE HAIL...IF YOU
ARE IN ITS PATH SEEK SHELTER INDOORS AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3660 9257 3680 9211 3680 9210 3681 9210
      3683 9204 3675 9192 3657 9198 3651 9248
TIME...MOT...LOC 1331Z 246DEG 49KT 3660 9242
WIND...HAIL <50MPH 1.00IN

$$

GAEDE

1 follow-up statement

392 
WWUS53 KSGF 261355
SVSSGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
855 AM CDT SAT MAR 26 2011

MOC091-153-261404-
/O.EXP.KSGF.SV.W.0021.000000T0000Z-110326T1400Z/
HOWELL MO-OZARK MO-
855 AM CDT SAT MAR 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OZARK AND WEST
CENTRAL HOWELL COUNTIES WILL EXPIRE AT 900 AM CDT...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3660 9257 3680 9211 3680 9210 3681 9210
      3683 9204 3675 9192 3657 9198 3651 9248
TIME...MOT...LOC 1354Z 246DEG 49KT 3673 9206

$$

GAEDE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 4:06 AM CDT	Freeze Watch	SGF	Barry, Barton, Benton, Camden, Cedar, Christian and 28 more	10 hr
Mar 26, 2:30 PM CDT	Freeze Warning	SGF	Barry, Barton, Benton, Camden, Cedar, Christian and 28 more	44 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.