Alert archive / Missouri / Red Flag Warnings in 2011
Red Flag Warning 1, NWS St. Louis, MO
NWS St. Louis, MO issued this red flag warning at Mar 23, 2011, 7:02 AM CDT for 4 counties in Missouri. It took effect at Mar 23, 2011, 1:00 PM CDT. It was in force for 6 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
- Mar 23, 2011, 7:02 AM CDT (12:02 UTC)
- In effect from
- Mar 23, 2011, 1:00 PM CDT
- Expired
- Mar 23, 2011, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
Counties Dent County, MO, Iron County, MO, Madison County, MO, Reynolds County, MO
The radar
The St Louis radar (KLSX), 136 km from the middle of the area, began a volume at 12:02 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
Springfield, MO (KSGF), launched 12:00Z, 0.0 hours before the alert went out and 267 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
- 1902 m above ground
- 0-6 km bulk shear
- 95 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
336 WWUS83 KLSX 231202 RFWLSX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 702 AM CDT WED MAR 23 2011 MOZ083>085-099-240000- /O.NEW.KLSX.FW.W.0001.110323T1800Z-110324T0000Z/ DENT MO-IRON MO-MADISON MO-REYNOLDS MO- 702 AM CDT WED MAR 23 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING. CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON DUE TO THE COMBINATION OF RELATIVE HUMIDITY VALUES BETWEEN 20 AND 25 PERCENT...WESTERLY WINDS OF 15 TO 20 MPH WITH GUSTS UP TO 35 MPH...AND DRY VEGETATION AND FUELS. 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. && $$ KANOFSKY
1 follow-up statement
301 WWUS83 KLSX 240004 RFWLSX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE ST LOUIS MO 704 PM CDT WED MAR 23 2011 MOZ083>085-099-240115- /O.EXP.KLSX.FW.W.0001.000000T0000Z-110324T0000Z/ DENT MO-IRON MO-MADISON MO-REYNOLDS MO- 704 PM CDT WED MAR 23 2011 ...RED FLAG WARNING HAS EXPIRED... THE RED FLAG WARNING IS NO LONGER IN EFFECT. FIRE WEATHER CONDITIONS HAVE IMPROVED HEADING INTO THE EVENING HOURS AS RELATIVE HUMIDITIES HAVE RISEN ABOVE CRITICAL THRESHOLDS. HOWEVER...WINDS WILL PERSIST FROM THE NORTHWEST AT 10 TO 20 MPH WITH GUSTS TO 30 MPH AT TIMES...THEN SLOWLY DIMINISH BY LATE THIS EVENING. $$ BYRD
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Lewis | 52 days |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Marion | 24 hr |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Marion | 58 days |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Ralls | 53 days |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Pike | 58 days |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Pike | 60 days |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Lincoln | 57 days |
| Mar 23, 12:45 PM CDT | River Flood Warning | LSX | Saint Charles | 114 days |
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; radar from the NEXRAD Level II archive.