Alert archive / Arkansas / Red Flag Warnings in 2011

Red Flag Warning 2, NWS Memphis, TN

April 6, 201112 counties in Arkansas; Dunklin County, Pemiscot County, Missouri

NWS Memphis, TN issued this red flag warning at Apr 6, 2011, 5:00 AM CDT for 12 counties in Arkansas; Dunklin County, Pemiscot County, Missouri. It took effect at Apr 6, 2011, 12:00 PM CDT. It was in force for 4 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, 5:00 AM CDT (10:00 UTC)
In effect from
Apr 6, 2011, 12:00 PM CDT
Expired
Apr 6, 2011, 3:57 PM CDT
In force
4 hr
Issued by
NWS Memphis, TN

Counties Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Dunklin County, MO, Pemiscot County, MO

The radar

The Memphis radar (KNQA), 71 km from the middle of the area, began a volume at 09:59 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

Little Rock, AR (KLZK), launched 00:00Z, 10.0 hours before the alert went out and 107 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, Little Rock, AR at 00:00Z on 2011-04-06Temperature 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, Little Rock, AR at 00:00Z on 2011-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.1939587897Sfc1 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
3219 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
203 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.

973 
WWUS84 KMEG 061000
RFWMEG

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEMPHIS TN
500 AM CDT WED APR 6 2011

...RED FLAG CONDITIONS EXPECTED TODAY...

.GUSTY SOUTH WINDS WILL DEVELOP AS LOW PRESSURE CONTINUES TO FORM
IN THE PLAINS. A COLD FRONT THAT PUSHED THROUGH THE GULF HAS CUT
OFF SIGNIFICANT MOISTURE RETURN TODAY...SO CRITICALLY LOW RH
VALUES ARE FORECASTED. IN ADDITION...FUEL MOISTURE VALUES ARE
QUITE LOW...SETTING THE STAGE FOR RED FLAG CONDITIONS.

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-062130-
/O.NEW.KMEG.FW.W.0002.110406T1700Z-110407T0000Z/
RANDOLPH-CLAY-LAWRENCE-GREENE-CRAIGHEAD-POINSETT-MISSISSIPPI-
CROSS-CRITTENDEN-ST. FRANCIS-LEE AR-PHILLIPS-DUNKLIN-PEMISCOT-
500 AM CDT WED APR 6 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS
EVENING...

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS
EVENING. 

LOW RELATIVE HUMIDITY VALUES NEAR 25 PERCENT WILL COMBINE WITH 20
FOOT WINDS AROUND 15 MPH AND LOW FUEL MOISTURE VALUES AROUND 7 OR
8 PERCENT TO CREATE RED FLAG CONDITIONS THIS AFTERNOON. 

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.

&&

$$

BORGHOFF
1 follow-up statement
831 
WWUS84 KMEG 062057
RFWMEG

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEMPHIS TN
357 PM CDT WED APR 6 2011

...RED FLAG WARNING HAS BEEN CANCELLED...

.RELATIVE HUMIDITY VALUES ACROSS THE WARNED AREA HAVE INCREASED
THROUGH THE AFTERNOON HOURS AND DO NOT POSE AN IMMEDIATE THREAT.

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-062200-
/O.CAN.KMEG.FW.W.0002.000000T0000Z-110407T0000Z/
RANDOLPH-CLAY-LAWRENCE-GREENE-CRAIGHEAD-POINSETT-MISSISSIPPI-
CROSS-CRITTENDEN-ST. FRANCIS-LEE AR-PHILLIPS-DUNKLIN-PEMISCOT-
357 PM CDT WED APR 6 2011

...RED FLAG WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS CANCELLED THE RED
FLAG WARNING. 

$$

CCD

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 6, 4:03 AM CDTWind AdvisoryMEGClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more15 hr

Nearby

Red Flag Warnings in Arkansas, 2011Red 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.