Alert archive / Missouri / Red Flag Warnings in 2011

Red Flag Warning 2, NWS St. Louis, MO

April 5, 20115 counties in Missouri

NWS St. Louis, MO issued this red flag warning at Apr 5, 2011, 12:25 PM CDT for 5 counties in Missouri. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 5, 2011, 12:25 PM CDT (17:25 UTC)
Expired
Apr 5, 2011, 7:00 PM CDT
In force
7 hr
Issued by
NWS St. Louis, MO

Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO, Osage County, MO

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.4 hours before the alert went out and 244 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2011-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2011-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
2390 m above ground
0-6 km bulk shear
96 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

363 
WWUS83 KLSX 051725
RFWLSX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
1225 PM CDT TUE APR 5 2011

MOZ041-047>050-060000-
/O.NEW.KLSX.FW.W.0002.110405T1725Z-110406T0000Z/
BOONE MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-
1225 PM CDT TUE APR 5 2011

...RED FLAG WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 7 PM CDT THIS EVENING. 

THE COMBINATION OF VERY DRY FUELS...SUSTAINED WINDS IN EXCESS OF
15 MPH...AND VERY LOW RELATIVE HUMIDITIES WILL CREATE CRITICAL
FIRE WEATHER CONDITIONS ACROSS PORTIONS OF CENTRAL MISSOURI UNTIL
EARLY THIS EVENING. THESE CONDITIONS ARE CONDUCIVE FOR THE RAPID
SPREAD AND GROWTH OF WILDFIRES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

&&

$$

TES
1 follow-up statement
877 
WWUS83 KLSX 052354
RFWLSX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE ST LOUIS MO
654 PM CDT TUE APR 5 2011

MOZ041-047>050-060100-
/O.EXP.KLSX.FW.W.0002.000000T0000Z-110406T0000Z/
BOONE MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-
654 PM CDT TUE APR 5 2011

...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING...

THE RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING. 

THE WIND WILL SUBSIDE AND THE RELATIVE HUMIDITY WILL RISE THIS
EVENING AS TEMPERATURES FALL. THEREFORE THE RED FLAG WARNING WILL
BE ALLOWED TO EXPIRE AT 700 PM.

$$

CARNEY

Nearby

Red Flag Warnings in Missouri, 2011Every red flag 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; the sounding from the Mesonet's radiosonde archive.