Alert archive / Arkansas / Flash Flood Warnings in 2012

Flash Flood Warning 2, NWS Little Rock, AR

January 25, 2012Johnson County, Newton County, Arkansas

NWS Little Rock, AR issued this flash flood warning at Jan 25, 2012, 12:07 PM CST for Johnson County, Newton County, Arkansas. It was in force for 113 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jan 25, 2012, 12:07 PM CST (18:07 UTC)
Expired
Jan 25, 2012, 2:00 PM CST
In force
113 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon
Flood severity
None

Counties Johnson County, AR, Newton County, AR

The radar

The Western Arkansas radar (KSRX), 103 km from the middle of the area, began a volume at 18:08 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, 6.1 hours before the alert went out and 124 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 2012-01-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2012-01-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -91 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
1 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
455 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
-91 m²/s²
0-3 km storm-relative helicity
109 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.

176 
WGUS54 KLZK 251807
FFWLZK
ARC071-101-252000-
/O.NEW.KLZK.FF.W.0002.120125T1807Z-120125T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1207 PM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN LITTLE ROCK HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN JOHNSON COUNTY IN WESTERN ARKANSAS...
  SOUTHERN NEWTON COUNTY IN NORTH CENTRAL ARKANSAS...

* UNTIL 200 PM CST

* AT 1205 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  AN AREA OF HEAVY RAINFALL ALONG A LINE EXTENDING FROM 9 MILES
  NORTHEAST OF WALNUT TO 4 MILES NORTH OF LUDWIG LAKE. DOPPLER RADAR
  INDICATES 2 TO 3 INCHES OF RAIN HAVE FALLEN OVER PARTS OF THE
  WARNED AREA IN THE PAST 3 HOURS WITH ADDITIONAL HEAVY RAIN
  EXPECTED. FLASH FLOODING IS LIKELY TO OCCUR. WHILE PRECIPITATION
  MAY TAPER OFF IN SOME AREAS DURING THE WARNING PERIOD...IT WILL
  TAKE SOME TIME FOR ANY HIGH WATER TO RUNOFF.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  JASPER...             WOODLAND...           WALNUT...
  UPPER BUFFALO WILDERNESS AREA...            ROSETTA...
  MINERAL SPGS REC AREA...                    LUDWIG LAKE...
  DEVILS KNOB...        YALE...               WAYTON...
  VENDOR...             SWAIN...              SALUS...
  PARTHENON...          OZONE...              OARK...
  NAIL...               MT JUDEA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF 
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY. 

&&

LAT...LON 3589 9300 3548 9342 3559 9371 3577 9370
      3577 9369 3577 9352 3588 9353 3589 9351
      3595 9350 3597 9347 3602 9318

$$

225

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 25, 9:53 AM CSTRiver Flood WarningLZKIndependence, Jackson, Lawrence24 hr
Jan 25, 10:14 AM CSTFlash Flood WarningLZKJohnson, Newton, Pope, Searcy106 min
Jan 25, 10:40 AM CSTRiver Flood WarningLZKWhite, Woodruff27 days

Nearby

Flash Flood Warnings in Arkansas, 2012Every flash flood warning in 2012

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.