Alert archive / Missouri / Red Flag Warnings in 2011
Red Flag Warning 3, NWS St. Louis, MO
NWS St. Louis, MO issued this red flag warning at Apr 6, 2011, 5:34 AM CDT for 24 counties in Missouri; 10 counties in Illinois. It took effect at Apr 6, 2011, 11:00 AM CDT. It was in force for 8 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 6, 2011, 5:34 AM CDT (10:34 UTC)
- In effect from
- Apr 6, 2011, 11:00 AM CDT
- Expired
- Apr 6, 2011, 7:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS St. Louis, MO
All 34 counties
Bond County, IL, Calhoun County, IL, Clinton County, IL, Jersey County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Lincoln County, MO, Madison County, MO, Moniteau County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 27 km from the middle of the area, began a volume at 10:39 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.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 10.6 hours before the alert went out and 265 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2388 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 422 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
882 WWUS83 KLSX 061034 RFWLSX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 534 AM CDT WED APR 6 2011 MOZ041-047>050-059-062-065-072>075-083>085-099-070000- /O.NEW.KLSX.FW.W.0003.110406T1600Z-110407T0000Z/ BOONE MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-GASCONADE MO- FRANKLIN MO-JEFFERSON MO-CRAWFORD MO-WASHINGTON MO- ST. FRANCOIS MO-STE. GENEVIEVE MO-DENT MO-IRON MO-MADISON MO- REYNOLDS MO- 534 AM CDT WED APR 6 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM CDT THIS EVENING. THE COMBINATION OF VERY DRY 10 HOUR FUELS LESS THAN 9 PERCENT... 20 FOOT SUSTAINED SOUTH OR SOUTHWEST WINDS IN EXCESS OF 15 MPH...AND VERY LOW MINIMUM RELATIVE HUMIDITIES OF 20 TO 25 PERCENT WILL CREATE CRITICAL FIRE WEATHER CONDITIONS ACROSS PORTIONS OF CENTRAL AND SOUTHEAST MISSOURI FROM LATE THIS MORNING 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. && $$ GKS
2 follow-up statements
832 WWUS83 KLSX 061744 RFWLSX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 1244 PM CDT WED APR 6 2011 ILZ064-069-070-074-079-098>102-MOZ036-042-051-052-060-061-063-064- 070000- /O.EXA.KLSX.FW.W.0003.000000T0000Z-110407T0000Z/ BOND IL-CLINTON IL-MARION IL-WASHINGTON IL-RANDOLPH IL-CALHOUN IL- JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-PIKE MO-AUDRAIN MO- MONTGOMERY MO-LINCOLN MO-WARREN MO-ST. CHARLES MO-ST. LOUIS MO- ST. LOUIS CITY MO- 1244 PM CDT WED APR 6 2011 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 7 PM CDT THIS EVENING. THE COMBINATION OF VERY DRY 10 HOUR FUELS LESS THAN 9 PERCENT... 20 FOOT SUSTAINED SOUTHWEST WINDS IN EXCESS OF 15 MPH... AND VERY LOW MINIMUM RELATIVE HUMIDITIES OF 20 TO 25 PERCENT WILL CREATE CRITICAL FIRE WEATHER CONDITIONS ACROSS PORTIONS OF CENTRAL AND EAST CENTRAL MISSOURI AND SOUTHWEST ILLINOIS INTO THE EARLY EVENING HOURS. THESE CONDITIONS ARE CONDUCIVE FOR THE RAPID SPREAD AND GROWTH OF WILDFIRES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ MOZ041-047>050-059-062-065-072>075-083>085-099-070000- /O.CON.KLSX.FW.W.0003.000000T0000Z-110407T0000Z/ BOONE MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-GASCONADE MO- FRANKLIN MO-JEFFERSON MO-CRAWFORD MO-WASHINGTON MO- ST. FRANCOIS MO-STE. GENEVIEVE MO-DENT MO-IRON MO-MADISON MO- REYNOLDS MO- 1244 PM CDT WED APR 6 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING. THE COMBINATION OF VERY DRY 10 HOUR FUELS LESS THAN 9 PERCENT... 20 FOOT SUSTAINED SOUTHWEST WINDS IN EXCESS OF 15 MPH... AND VERY LOW MINIMUM RELATIVE HUMIDITIES OF 20 TO 25 PERCENT WILL CREATE CRITICAL FIRE WEATHER CONDITIONS ACROSS PORTIONS OF CENTRAL AND SOUTHEAST MISSOURI INTO THE EARLY EVENING HOURS. 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. && $$ TRUETT
659 WWUS83 KLSX 062347 RFWLSX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 647 PM CDT WED APR 6 2011 ILZ064-069-070-074-079-098>102-MOZ036-041-042-047>052-059>065- 072>075-083>085-099-070100- /O.EXP.KLSX.FW.W.0003.000000T0000Z-110407T0000Z/ BOND IL-CLINTON IL-MARION IL-WASHINGTON IL-RANDOLPH IL-CALHOUN IL- JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-PIKE MO-BOONE MO- AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO- LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-DENT MO-IRON MO- MADISON MO-REYNOLDS MO- 647 PM CDT WED APR 6 2011 ...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING... THE RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING. RELATIVE HUMIDITY LEVELS ARE RISING AND SUSTAINED WINDS ARE FALLING THIS EVENING. THEREFORE THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 700 PM. $$ CARNEY
Nearby
Red Flag Warnings in Missouri, 2011Red Flag Warnings in Illinois, 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; radar from the NEXRAD Level II archive.