Alert archive / Arkansas / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 239, NWS Little Rock, AR

July 8, 20144 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 8, 2014, 6:49 PM CDT for 4 counties in Arkansas. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 8, 2014, 6:49 PM CDT (23:49 UTC)
Expired: Jul 8, 2014, 7:30 PM CDT
In force: 41 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Conway County, AR, Perry County, AR, Saline County, AR, Yell County, AR

The radar

The Little Rock radar (KLZK), 63 km from the middle of the area, began a volume at 23:49 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 8, 5:56 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 11.8 hours before the alert went out and 272 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1296 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1067 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 6:48 PM CDT, 1 minute earlier.

Area forecast discussion, Jul 8, 6:48 PM CDT, 1 minute before

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Hazardous weather outlook, Jul 8, 5:00 AM CDT, 13 hours 49 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LITTLE ROCK AR
500 AM CDT TUE JUL 8 2014

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-091000-
ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-
CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-
INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE-
MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE-
PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE-
WOODRUFF-YELL-
500 AM CDT TUE JUL 8 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS.

.DAY ONE...TODAY AND TONIGHT

SHOWERS AND A FEW THUNDERSTORMS IN THE NORTHERN HALF OF ARKANSAS
THIS MORNING WILL WEAKEN. THERE WILL BE A LULL INTO THE AFTERNOON
HOURS...AND THEN SCATTERED THUNDERSTORMS ARE EXPECTED TO REDEVELOP
IN THE NORTH.

THE NEW STORMS WILL LIKELY BUILD SLOWLY TOWARD CENTRAL AND SOUTHERN
SECTIONS OF THE STATE THROUGH THE EVENING HOURS AS A COLD FRONT
PUSHES INTO THE REGION FROM MISSOURI.

SOME STORMS WILL LIKELY BE SEVERE THIS AFTERNOON AND EVENING.
DAMAGING WINDS AND QUARTER SIZE HAIL OR LARGER WILL BE THE MAIN
CONCERNS.

THE STRONGEST STORMS WILL DROP LOCALLY HEAVY RAIN...WITH SOME SPOTS
PICKING UP MORE THAN AN INCH OF PRECIPITATION.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE AFOREMENTIONED FRONT WILL PUSH INTO SOUTHERN ARKANSAS ON
WEDNESDAY...WITH COOLER AIR TO FOLLOW ACROSS THE NORTHERN COUNTIES.
FARTHER SOUTH...HIT AND MISS THUNDERSTORMS ARE IN THE FORECAST
SURROUNDING THE FRONT. AGAIN...A FEW STORMS COULD BE SEVERE.

MORE STORMS SHOULD POP UP ON THURSDAY...ESPECIALLY IN SOUTHERN AND
WESTERN SECTIONS OF THE STATE. ON FRIDAY...ANY STORMS WILL BECOME
MORE SPOTTY AS THE FRONT LIFTS TO THE NORTH.

A RIDGE OF HIGH PRESSURE WILL BUILD OVER THE AREA FROM THE SOUTHWEST
THIS WEEKEND. TEMPERATURES WILL BE ABOVE NORMAL...WITH AFTERNOON
HEAT INDEX VALUES AROUND 100 DEGREES IN ALL BUT THE OZARK MOUNTAINS
OF THE NORTHWEST.

IT APPEARS THE HEAT WILL BE TEMPORARY. HIGH PRESSURE WILL WEAKEN
EARLY NEXT WEEK...AND THAT WILL ALLOW ANOTHER COLD FRONT TO VISIT
FROM THE NORTH. COOLER CONDITIONS ARE EXPECTED BEHIND THE FRONT...
WITH BELOW NORMAL TEMPERATURES BEYOND MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING AS
SEVERE WEATHER BECOMES MORE LIKELY.

&&

VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND
CLICK ON CENTRAL ARKANSAS.

46

In the hours before

Special weather statement, Jul 8, 3:37 PM CDT, 3 hours 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
337 PM CDT TUE JUL 8 2014

ARZ003-012-082105-
BOONE AR-NEWTON AR-
337 PM CDT TUE JUL 8 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN BOONE AND NORTHEASTERN
NEWTON COUNTIES UNTIL 400 PM CDT...

AT 333 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 3 MILES SOUTH OF HARRISON...MOVING SOUTHEAST AT
10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

* LOCATIONS IMPACTED INCLUDE...
  HARRISON...           VALLEY SPRINGS...     OLVEY...
  CAPPS...              GAITHER...            BELLEFONTE...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY...TURN AROUND DONT DROWN!

LAT...LON 3623 9291 3604 9302 3616 9327 3630 9315
TIME...MOT...LOC 2037Z 296DEG 7KT 3620 9313

226

Special weather statement, Jul 8, 3:50 PM CDT, 2 hours 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
350 PM CDT TUE JUL 8 2014

ARZ012-082115-
NEWTON AR-
350 PM CDT TUE JUL 8 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN NEWTON COUNTY UNTIL
415 PM CDT...

AT 348 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 4 MILES NORTHWEST OF LOST VALLEY SP...MOVING
SOUTHEAST AT 15 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

* LOCATIONS IMPACTED INCLUDE...
  LOST VALLEY SP...     JASPER...
  UPPER BUFFALO WILDERNESS AREA...            SWAIN...
  PONCA...              PARTHENON...          MT SHERMAN...
  MOSSVILLE...          LOW GAP...            COMPTON...
  BOXLEY...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY...TURN AROUND DONT DROWN!

LAT...LON 3599 9314 3582 9335 3596 9348 3600 9345
      3607 9345 3608 9348 3608 9349 3610 9349
      3613 9344 3613 9335
TIME...MOT...LOC 2050Z 315DEG 14KT 3606 9341

226

Local storm report, Jul 8, 5:25 PM CDT, 1 hour 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 2:48 AM CDT	Special Weather Statement	LZK	Baxter, Boone, Fulton, Marion	72 min
Jul 8, 3:42 AM CDT	Special Weather Statement	LZK	Baxter, Boone, Fulton, Izard, Marion, Newton and 3 more	58 min
Jul 8, 4:39 AM CDT	Special Weather Statement	LZK	Cleburne, Independence, Jackson, Stone	56 min
Jul 8, 5:49 AM CDT	Special Weather Statement	LZK	Monroe, Prairie, Woodruff	56 min
Jul 8, 3:37 PM CDT	Special Weather Statement	LZK	Boone	28 min
Jul 8, 3:50 PM CDT	Special Weather Statement	LZK	Newton	25 min
Jul 8, 3:59 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Newton, Searcy	31 min
Jul 8, 4:09 PM CDT	Severe Thunderstorm Warning	LZK	Boone, Newton	36 min
Jul 8, 4:28 PM CDT	Severe Thunderstorm Warning	LZK	Newton, Searcy	47 min
Jul 8, 4:46 PM CDT	Flash Flood Warning	LZK	Newton	3 hr
Jul 8, 5:11 PM CDT	Severe Thunderstorm Warning	LZK	Newton	34 min
Jul 8, 5:22 PM CDT	Severe Thunderstorm Warning	LZK	Newton, Pope, Searcy, Van Buren	38 min
Jul 8, 5:29 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Pope, Van Buren	31 min
Jul 8, 5:55 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Pope, Van Buren	50 min
Jul 8, 6:00 PM CDT	Severe Thunderstorm Warning	LZK	Newton, Pope, Searcy, Van Buren	30 min
Jul 8, 6:08 PM CDT	Severe Thunderstorm Warning	LZK	Yell	37 min
Jul 8, 6:18 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Newton	25 min
Jul 8, 6:25 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Pope, Van Buren	35 min
Jul 8, 6:33 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Perry, Pope, Yell	42 min
Jul 8, 6:45 PM CDT	Severe Thunderstorm Warning	LZK	Woodruff	30 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2014 Every severe thunderstorm warning in 2014

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.