Alert archive / Arkansas / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 49, NWS Little Rock, AR

April 3, 2007White County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Apr 3, 2007, 6:55 PM CDT for White County, Arkansas. It was in force for 65 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 3, 2007, 6:55 PM CDT (23:55 UTC)
Expired: Apr 3, 2007, 8:00 PM CDT
In force: 65 min
Issued by: NWS Little Rock, AR
Area: Counties, with a storm outline in the text

County White County, AR

The radar

The Little Rock radar (KLZK), 79 km from the middle of the area, began a volume at 23:57 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.

What was reported inside it

Time	Report	Where	Remark
Apr 3, 7:11 PM CDT	HAIL 0.88	Rose Bud, AR
Apr 3, 7:45 PM CDT	HAIL 0.88	Bradford, AR

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 3, 3:12 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.9 hours before the alert went out and 171 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: 1013 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 824 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KLZK 032357
SVRLZK
ARC145-040100-
/O.NEW.KLZK.SV.W.0049.070403T2355Z-070404T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LITTLE ROCK AR
655 PM CDT TUE APR 3 2007

THE NATIONAL WEATHER SERVICE IN LITTLE ROCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WHITE COUNTY IN CENTRAL ARKANSAS

* UNTIL 800 PM CDT

* AT 649 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SEVERE THUNDERSTORMS.  ONE STORM WAS LOCATED 18 MILES NORTHWEST    
  OF RUSSELL...OR NEAR PLEASANT PLAINS...WITH ANOTHER STORM ABOUT 5  
  MILES WEST OF ROSE BUD. THE STORMS WERE MOVING TO THE EAST AT 
  30 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROOSEVELT AROUND 700 PM CDT...
  ROSE BUD AROUND 705 PM CDT...
  VELVET RIDGE AROUND 720 PM CDT... 

&&

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN LITTLE ROCK.

LAT...LON 3554 9179 3546 9179 3545 9184 3535 9184
      3536 9211 3518 9210 3520 9176 3526 9140
      3530 9145 3534 9144 3543 9136 3544 9158
      3553 9158

$$

46

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 Apr 3, 2:05 PM CDT, 4 hours 50 minutes earlier.

Area forecast discussion, Apr 3, 2:05 PM CDT, 4 hours 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LITTLE ROCK AR
205 PM CDT TUE APR 3 2007

.DISCUSSION...
ON-GOING CONVECTION OVER MO FIRING AHEAD OF THE COLD FRONT...& AS
THE SHORTWAVE ENERGY MOVES EAST. SOUTHWEST END HAS BEEN SLOW TO
FIRE...BUT WITH LAPS DATA SHOWING LI OF -8 TO -10...WHILE THETA-E
SURGE HAS NOW SHIFTED TO FAR SE OK TO CENTRAL MO. 18Z SOUNDING
FROM KLZK HAD A PRECIP WATER 0.99 INCHES...LI OF -7.2...CAPE OF
2355 J/KG...& A WIND FIELD OF SW 10-40 SURFACE TO 6K FT. THIS
SOUNDING IS SLIGHTLY LESS UNSTABLE THAN 12Z SOUNDING...INVERSION
STILL PRESENT AT 4K-8K FT. EXPECTING ISOLATED SEVERE STORMS WITH
THE SQUALL- LINE AS IT MOVES E-SE AHEAD OF THE COLD FRONT. UP POPS
TO 50% CHANCE OVER MOST AR EARLIER...& MAY HAVE TO GO LIKELY IN
SOME NE SPOTS LATER. SPC CONTINUES A MODERATE RISK...OVER CENTRAL
AR FOR DAY ONE. PRESSURE GRADIENT AHEAD OF THE COLD FRONT HAS
INCREASED TO PROMPT LAKE WIND ADV THROUGH MIDNIGHT OVER ALL OF AR.
AS STATED EARLIER... OVERALL JET DYNAMICS ARE NOT IMPRESSIVE...BUT
ENOUGH MOISTURE...INSTABILITY & LIFT WILL OVERCOME. WITHOUT GREAT
JET DYNAMICS...SEVERE POTENTIAL WILL BE LIMITED. COLD FRONT HAS
MADE SOME PROGRESS E-SE...& LOCATED OVER FAR SE KS...NORTH TO NEAR
KUIN.

&&

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT
MODELS HAVE SHORTWAVE ENERGY QUICKLY MOVING THROUGH AR FROM 18Z-
00Z THIS AFTERNOON TO EVENING...WITH MAIN LIFT OVER FAR SE AR AT 00Z.
HAVE GOOD CHANCE OF CONVECTION IN FORECAST WITH MENTION OF SEVERE
STORM POTENTIAL. ALSO EXPECTED SPEED OF SHORTWAVE MOVEMENT SHOULD
LIMIT SOME SEVERE POTENTIAL & COVERAGE...BUT WILL SEE SQUALL-LINE
FORM AHEAD OF THE COLD FRONT...& SWEEP ACROSS THE STATE. OVERALL
ATMOSPHERIC SHEAR APPEARS TO BE LIMITED...SO MAIN THREAT OF SEVERE
STORMS WILL BE LARGE HAIL...STRONG WINDS...WITH ONLY ISOLATED
TORNADOES. 00Z- 06Z...ENERGY IS PUSHING SOUTH OF AR...& STORMS
SHOULD HAVE EXITED THE STATE BY 06Z. MUCH COOLER & DRIER AIR THEN
FILTERS IN OVER AR FOR WEDNESDAY & THE REST OF THE WEEK...TAKING TEMPS
BACK TO BELOW NORMALS...FROM NORMAL LOWS IN THE MID 40S WHILE HIGHS
IN THE MID & UPPER 60S. WILL HAVE TO CONSIDER MENTION OF FROST LATE
IN THE WEEK...TO POSSIBLE FREEZE WATCH OR WARNING OVER THE
WEEKEND...ESPECIALLY IN NORTHERN PARTS OF THE STATE.

&&

.LONG TERM...SATURDAY THROUGH TUESDAY
NWLY FLOW ALOFT IS FCST TO PERSIST OVER THE MIDDLE OF THE NATION
DURG THE PD. SEVERAL UPPER LVL SYSTEMS WL DROP SEWD AND BRING
REINFORCING SHOTS OF COOLER AIR TO THE FA. FIRST SYS WL AFFECT THE
AREA EARLY IN THE WEEKEND...WITH SMALL CHCS OF LGT RAIN POSSIBLE
OVR MAINLY WRN AR SAT AFTN AND EVENING. RATHER CHILLY AIR WL
FOLLOW... WITH LOWS BY SUN MRNG IN THE UPPER 20S TO LOWER
30S...THREATENING TENDER VEGETATION OVR MUCH OF THE FA. SOME
MODERATION IN TEMPS EXPECTED BY MON AND ANOTHER UPPER SYS PASSES
NE OF THE STATE MON NGT AND TUE. RAIN CHCS WL BE LIMITED AS BULK
OF LIFT RMNS N OF THE FA.

&&

.PRELIMINARY POINT TEMPS/POPS...
BATESVILLE AR     47  61  35  57 /  50  10   0  10
CAMDEN AR         50  64  41  61 /  50  10   0  10
HARRISON AR       40  58  34  56 /  50  10   0  10
HOT SPRINGS AR    49  64  40  60 /  50  10   0  10
LITTLE ROCK   AR  49  63  39  60 /  50  10   0  10
MONTICELLO AR     53  65  41  62 /  50  10   0  10
MOUNT IDA AR      47  63  40  60 /  50  10   0  10
MOUNTAIN HOME AR  42  58  33  56 /  50  10   0  10
NEWPORT AR        49  61  35  56 /  50  10   0  10
PINE BLUFF AR     51  65  40  61 /  50  10   0  10
RUSSELLVILLE AR   45  61  37  58 /  50  10   0  10
SEARCY AR         49  62  38  58 /  50  10   0  10
STUTTGART AR      51  64  39  60 /  50  10   0  10
&&

.LZK WATCHES/WARNINGS/ADVISORIES...
LAKE WIND ADVISORY UNTIL MIDNIGHT CDT TONIGHT FOR 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.

&&

SHORT TERM...59 / LONG TERM...44

Hazardous weather outlook, Apr 3, 3:40 PM CDT, 3 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
340 PM CDT TUE APR 3 2007

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-041000-
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-
340 PM CDT TUE APR 3 2007

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WERE DEVELOPING IN
AREAS NORTH OF ARKANSAS EARLY THIS AFTERNOON. THE STORMS WERE
POPPING UP FROM THE OHIO VALLEY TO MISSOURI. IN ARKANSAS...WARM AIR
ALOFT WAS CAPPING THE ATMOSPHERE...WITH NO STORMS AS OF 3 PM CDT.
THAT WILL CHANGE THE AFTERNOON PROGRESSES.

A COLD FRONT WILL PUSH INTO THE STATE...WITH THE CAP WEAKENING.
THUNDERSTORMS WILL DEVELOP ALONG THE FRONT...WITH THE STORMS
AFFECTING ABOUT THE NORTHERN HALF OF THE STATE THROUGH 7 PM THIS
EVENING. STORMS WILL PUSH INTO SOUTHERN ARKANSAS AFTER 7 PM.

SEVERE WEATHER WILL BE LIKELY. THE MAIN CONCERNS WILL BE STRONG TO
DAMAGING WINDS AND LARGE HAIL. ISOLATED TORNADOES CANNOT BE RULED
OUT.

THE FRONT WILL EXIT THE STATE TO THE SOUTH AFTER MIDNIGHT...WITH
MUCH COOLER AIR TO FOLLOW.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A NORTHWEST WIND FLOW BEHIND THE FRONT WILL BRING SEVERAL ROUNDS OF
COOL AIR IN THE COMING DAYS. CANADIAN HIGH PRESSURE WILL SLOWLY
BUILD TOWARD THE REGION...WITH TEMPERATURES APPROACHING FREEZING IN
PORTIONS OF NORTHERN ARKANSAS DURING THE EARLY MORNING HOURS
THURSDAY THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY THIS AFTERNOON AND EVENING.

&&

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

46

In the hours before

Local storm report, Apr 3, 5:47 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
547 PM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0540 PM     HAIL             4 W MOUNTAIN VIEW       35.87N 92.18W
04/03/2007  E1.00 INCH       STONE              AR   TRAINED SPOTTER

0538 PM     HAIL             SPRINGFIELD             35.27N 92.57W
04/03/2007  E1.00 INCH       CONWAY             AR   BROADCAST MEDIA

0543 PM     HAIL             7 S MOUNTAIN VIEW       35.77N 92.11W
04/03/2007  E0.75 INCH       STONE              AR   TRAINED SPOTTER

&&

55

Local storm report, Apr 3, 5:53 PM CDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
553 PM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0528 PM     HAIL             12 NE MORRILTON         35.28N 92.59W
04/03/2007  E1.75 INCH       CONWAY             AR   EMERGENCY MNGR

0548 PM     HAIL             2 S FOX                 35.75N 92.30W
04/03/2007  E1.75 INCH       STONE              AR   TRAINED SPOTTER

&&

55

Local storm report, Apr 3, 5:54 PM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
554 PM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0553 PM     HAIL             1 E WOOSTER             35.20N 92.43W
04/03/2007  E0.75 INCH       FAULKNER           AR   CO-OP OBSERVER

&&

TBRAY

Local storm report, Apr 3, 6:04 PM CDT, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
604 PM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0556 PM     HAIL             5 S MOUNTAIN VIEW       35.80N 92.11W
04/03/2007  E0.88 INCH       STONE              AR   TRAINED SPOTTER

0600 PM     HAIL             2 N MOUNTAIN VIEW       35.90N 92.11W
04/03/2007  E0.88 INCH       STONE              AR   TRAINED SPOTTER

&&

55

Local storm report, Apr 3, 6:20 PM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
620 PM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0615 PM     HAIL             ADONA                   35.03N 92.92W
04/03/2007  E1.00 INCH       PERRY              AR   TRAINED SPOTTER

&&

55

Local storm report, Apr 3, 6:33 PM CDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
633 PM CDT TUE APR 03 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0630 PM     HAIL             PERRYVILLE              35.01N 92.80W
04/03/2007  E0.75 INCH       PERRY              AR   LAW ENFORCEMENT

&&

55

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 9:14 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Pike	46 min
Apr 2, 9:59 PM CDT	Severe Thunderstorm Warning	LZK	Clark	46 min
Apr 3, 11:28 AM CDT	Lake Wind Advisory	LZK	Arkansas, Baxter, Bradley, Calhoun, Clark, Cleburne and 28 more	13 hr
Apr 3, 3:53 PM CDT	Severe Thunderstorm Warning	LZK	Fulton, Izard	67 min
Apr 3, 4:18 PM CDT	Severe Thunderstorm Warning	LZK	Boone	42 min
Apr 3, 4:26 PM CDT	Severe Thunderstorm Warning	LZK	Conway	49 min
Apr 3, 4:32 PM CDT	Severe Thunderstorm Warning	LZK	Sharp	43 min
Apr 3, 4:34 PM CDT	Severe Thunderstorm Warning	LZK	Searcy	41 min
Apr 3, 4:55 PM CDT	Severe Thunderstorm Warning	LZK	Yell	50 min
Apr 3, 4:56 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Stone	49 min
Apr 3, 4:57 PM CDT	Severe Thunderstorm Warning	LZK	Izard	48 min
Apr 3, 5:07 PM CDT	Severe Thunderstorm Warning	LZK	Sharp	38 min
Apr 3, 5:15 PM CDT	Severe Thunderstorm Warning	LZK	Searcy, Stone	60 min
Apr 3, 5:16 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Perry	44 min
Apr 3, 5:32 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner	58 min
Apr 3, 5:43 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner	62 min
Apr 3, 5:45 PM CDT	Severe Thunderstorm Warning	LZK	Sharp	30 min
Apr 3, 6:00 PM CDT	Severe Thunderstorm Warning	LZK	Perry	60 min
Apr 3, 6:07 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Independence	53 min
Apr 3, 6:15 PM CDT	Severe Thunderstorm Warning	LZK	Stone	45 min
Apr 3, 6:41 PM CDT	Severe Thunderstorm Warning	LZK	Pulaski	64 min
Apr 3, 6:44 PM CDT	Severe Thunderstorm Warning	LZK	Jackson	37 min
Apr 3, 6:47 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner	43 min
Apr 3, 6:59 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Polk	61 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.