Alert archive / Missouri / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 421, NWS St. Louis, MO

August 5, 2008Washington County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 5, 2008, 5:24 PM CDT for Washington County, Missouri. It was in force for 51 min. 3 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: Aug 5, 2008, 5:24 PM CDT (22:24 UTC)
Expired: Aug 5, 2008, 6:15 PM CDT
In force: 51 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon

County Washington County, MO

The radar

The St Louis radar (KLSX), 70 km from the middle of the area, began a volume at 22:25 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
Aug 5, 5:43 PM CDT	HAIL 0.88	11 Nw Potosi, MO
Aug 5, 5:50 PM CDT	HAIL 0.88	5 Nne Old Mines, MO
Aug 5, 5:55 PM CDT	TSTM WND GST 60	4 Ne Old Mines, MO	PEA SIZE HAIL

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
Aug 5, 2:59 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.4 hours before the alert went out and 295 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: 2431 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1525 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 052224
SVRLSX
MOC221-052315-
/O.NEW.KLSX.SV.W.0421.080805T2224Z-080805T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
524 PM CDT TUE AUG 5 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 615 PM CDT

* AT 521 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS
  STORM WAS LOCATED 8 MILES WEST OF OLD MINES...OR 9 MILES NORTHWEST
  OF POTOSI...AND WAS MOVING NORTHEAST AT 33 MPH.

* LOCATIONS IMPACTED INCLUDE...
  OLD MINES...
  RICHWOODS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3810 9110 3821 9078 3817 9075 3811 9069
      3810 9069 3809 9067 3810 9066 3809 9066
      3797 9064 3785 9110
TIME...MOT...LOC 2224Z 236DEG 29KT 3801 9090

$$

TILLY

1 follow-up statement

000 
WWUS53 KLSX 052249 RRA
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
549 PM CDT TUE AUG 5 2008

MOC221-052315-
/O.CON.KLSX.SV.W.0421.000000T0000Z-080805T2315Z/
WASHINGTON MO-
548 PM CDT TUE AUG 5 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR NORTHERN WASHINGTON COUNTY...

AT 543 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
THIS STORM WAS LOCATED NEAR LATTY...OR 7 MILES NORTHWEST OF POTOSI...
AND WAS MOVING NORTHEAST AT 18 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE... 
LATTY...OLD MINES...RICHWOODS AND CADET.

LAT...LON 3810 9110 3821 9078 3817 9075 3811 9069
      3810 9069 3809 9067 3810 9066 3809 9066
      3797 9064 3785 9110
TIME...MOT...LOC 2248Z 245DEG 15KT 3802 9084

$$

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 2:29 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Pike, Ralls	46 min
Aug 5, 2:56 PM CDT	Severe Thunderstorm Warning	LSX	Pike	49 min
Aug 5, 3:14 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Pike, Ralls	46 min
Aug 5, 3:23 PM CDT	Flash Flood Warning	LSX	Marion, Ralls	6 hr
Aug 5, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Pike	40 min
Aug 5, 4:14 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe, Ralls	61 min
Aug 5, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	42 min
Aug 5, 4:44 PM CDT	Flash Flood Warning	LSX	Audrain, Monroe, Pike, Ralls	6 hr
Aug 5, 4:44 PM CDT	Severe Thunderstorm Warning	LSX	Pike	46 min
Aug 5, 4:57 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve	6 hr
Aug 5, 5:03 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	42 min
Aug 5, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike, Saint Charles	60 min
Aug 5, 5:59 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
Aug 5, 6:05 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	55 min
Aug 5, 6:09 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	51 min
Aug 5, 6:40 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	50 min
Aug 5, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	49 min
Aug 5, 6:44 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	61 min
Aug 5, 6:59 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	61 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2008 Every severe thunderstorm warning in 2008

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.