Alert archive / Missouri / Tornado Warnings in 2011

Tornado Warning 1, NWS St. Louis, MO

February 27, 2011Pike County, Missouri; Pike County, Illinois

NWS St. Louis, MO issued this tornado warning at Feb 27, 2011, 8:02 PM CST for Pike County, Missouri; Pike County, Illinois. It was in force for 28 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: Feb 27, 2011, 8:02 PM CST (02:02 UTC)
Expired: Feb 27, 2011, 8:30 PM CST
In force: 28 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

Counties Pike County, IL, Pike County, MO

The radar

The St Louis radar (KLSX), 97 km from the middle of the area, began a volume at 02:03 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
Feb 27, 8:05 PM CST	TSTM WND DMG	Spencerburg, MO	SMALLER TREES UPROOTED... SHINGLES TORN OFF HOUSES.

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

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 27, 5:33 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.0 hours before the alert went out and 211 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: 124 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 494 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

717 
WFUS53 KLSX 280202
TORLSX
ILC149-MOC163-280230-
/O.NEW.KLSX.TO.W.0001.110228T0202Z-110228T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
802 PM CST SUN FEB 27 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHWESTERN PIKE COUNTY IN NORTHEAST MISSOURI...

* UNTIL 830 PM CST

* AT 759 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR SPENCERBURG...OR 10 MILES NORTHEAST OF
  VANDALIA...AND MOVING NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LOUISIANA...PITTSFIELD...PIKE...ATLAS...GRIGGSVILLE...ASHBURN...NEW
  CANTON...ROCKPORT...EL DARA...SUMMER HILL...NEW HARTFORD...
  MARTINSBURG...INDEPENDENCE...NEW SALEM...TIME...DETROIT...PERRY...
  MILTON AND FLORENCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 3958 9058 3957 9058 3931 9134 3946 9145
      3952 9136 3982 9073
TIME...MOT...LOC 0203Z 240DEG 55KT 3944 9129

$$

BRITT

2 follow-up statements

306 
WWUS53 KLSX 280212
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
812 PM CST SUN FEB 27 2011

ILC149-MOC163-280230-
/O.CON.KLSX.TO.W.0001.000000T0000Z-110228T0230Z/
PIKE IL-PIKE MO-
812 PM CST SUN FEB 27 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR PIKE COUNTY IN WEST
CENTRAL ILLINOIS...AND NORTHERN PIKE COUNTY IN NORTHEAST MISSOURI
UNTIL 830 PM CST...

AT 807 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 7 MILES EAST OF FRANKFORD...OR 7 MILES WEST OF
LOUISIANA...MOVING NORTHEAST AT 70 MPH.

LOCATIONS IMPACTED INCLUDE...
  PITTSFIELD...ATLAS...GRIGGSVILLE...NEW CANTON...ROCKPORT...EL
  DARA...SUMMER HILL...NEW HARTFORD...MARTINSBURG...BAYLIS...
  INDEPENDENCE...NEW SALEM...TIME...DETROIT...FLORENCE...MILTON AND
  PERRY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3982 9073 3957 9058 3934 9126 3952 9136
TIME...MOT...LOC 0213Z 245DEG 61KT 3952 9107

$$

BRITT

182 
WWUS53 KLSX 280228
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
828 PM CST SUN FEB 27 2011

ILC149-MOC163-280237-
/O.EXP.KLSX.TO.W.0001.000000T0000Z-110228T0230Z/
PIKE IL-PIKE MO-
828 PM CST SUN FEB 27 2011

...THE TORNADO WARNING FOR PIKE COUNTY IN WEST CENTRAL ILLINOIS...AND
NORTHERN PIKE COUNTY IN NORTHEAST MISSOURI WILL EXPIRE AT 830 PM
CST...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3982 9073 3957 9058 3934 9126 3952 9136
TIME...MOT...LOC 0227Z 245DEG 61KT 3962 9079

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 6:26 PM CST	Severe Thunderstorm Warning	LSX	Lewis, Marion	49 min
Feb 27, 6:57 PM CST	Severe Thunderstorm Warning	LSX	Lewis, Marion	15 min
Feb 27, 7:38 PM CST	Severe Thunderstorm Warning	LSX	Marion, Ralls	37 min
Feb 27, 8:13 PM CST	Areal Flood Advisory	LSX	Marion	4 hr
Feb 27, 8:25 PM CST	Severe Thunderstorm Warning	LSX	Pike	35 min
Feb 27, 9:50 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Pike, Ralls	40 min
Feb 27, 9:54 PM CST	Tornado Warning	LSX	Cole, Gasconade, Osage	36 min
Feb 27, 10:19 PM CST	Tornado Warning	LSX	Franklin, Gasconade, Warren	41 min
Feb 27, 10:25 PM CST	Tornado Warning	LSX	Franklin, Gasconade	50 min
Feb 27, 10:47 PM CST	Tornado Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren, City of Saint Louis	43 min
Feb 27, 11:05 PM CST	River Flood Warning	LSX	Marion	35 hr
Feb 27, 11:11 PM CST	River Flood Warning	LSX	Lincoln	35 hr
Feb 27, 11:11 PM CST	River Flood Warning	LSX	Marion	35 hr
Feb 27, 11:11 PM CST	River Flood Warning	LSX	Monroe	4 days
Feb 27, 11:18 PM CST	Tornado Warning	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	42 min
Feb 27, 11:47 PM CST	Severe Thunderstorm Warning	LSX	Crawford	21 min
Feb 28, 12:06 AM CST	Severe Thunderstorm Warning	LSX	Washington	39 min
Feb 28, 12:18 AM CST	Tornado Warning	LSX	Iron, Reynolds	42 min
Feb 28, 12:23 AM CST	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	52 min
Feb 28, 12:44 AM CST	Tornado Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois	46 min
Feb 28, 2:19 AM CST	River Flood Warning	LSX	Saint Charles	4 days
Feb 28, 6:46 AM CST	River Flood Warning	LSX	Marion	29 hr
Feb 28, 6:46 AM CST	River Flood Warning	LSX	Pike	38 hr
Feb 28, 6:46 AM CST	River Flood Warning	LSX	Pike	52 hr
Feb 28, 10:38 AM CST	River Flood Warning	LSX	Gasconade, Montgomery	4 days
Feb 28, 11:43 AM CST	River Flood Warning	LSX	Lincoln	47 hr
Feb 27, 8:14 PM CST	Severe Thunderstorm Warning	LSX	Brown	16 min
Feb 27, 10:30 PM CST	Severe Thunderstorm Warning	LSX	Pike	18 min
Feb 27, 11:43 PM CST	Tornado Warning	LSX	Bond, Clinton, Fayette, Madison, Saint Clair, Washington	47 min
Feb 28, 12:07 AM CST	Tornado Warning	LSX	Bond, Clinton, Fayette, Marion, Washington	38 min
Feb 28, 11:14 AM CST	River Flood Warning	LSX	Morgan, Pike	17 days

Nearby

Tornado Warnings in Missouri, 2011 Tornado Warnings in Illinois, 2011 Every tornado warning in 2011 Tornadoes 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.