Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 595, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Jun 21, 2011, 7:29 PM CDT for Scott County, Arkansas. It was in force for 46 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
- Jun 21, 2011, 7:29 PM CDT (00:29 UTC)
- Expired
- Jun 21, 2011, 8:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
County Scott County, AR
The radar
The Western Arkansas radar (KSRX), 55 km from the middle of the area, began a volume at 00:29 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 |
|---|---|---|---|
| Jun 21, 6:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 0.5 hours before the alert went out and 228 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
- 174 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1626 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 Jun 21, 6:24 PM CDT, 1 hour 5 minutes earlier.
Area forecast discussion, Jun 21, 6:24 PM CDT, 1 hour 5 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE LITTLE ROCK AR 624 PM CDT TUE JUN 21 2011 .AVIATION... ISOLATED TSRA WILL CONTINUE TO DISSIPATE THIS EVENING...ALONG WITH GUSTY WINDS. HAVE ADDED TEMPO GROUP FOR STRATUS DEVELOPMENT AT THE SOUTHERN SITES WHERE RAIN FELL THIS MORNING. ALSO HAVE VCTS DURING THE AFTERNOON HOURS ACROSS THE SOUTH...WHERE CONVECTION COULD SET UP AS COLD FRONT SLOWLY MOVES ACROSS THE STATE WEDNESDAY. && .PREV DISCUSSION... /ISSUED 301 PM CDT TUE JUN 21 2011/ SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT A COLD FRONT WAS ENTERING NORTHWEST ARKANSAS THIS AFTERNOON. THE FRONT WILL SAG INTO CENTRAL SECTIONS OF THE STATE BEFORE STALLING. THE FRONT WILL ACT AS A FOCUS FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS IN THE COMING DAYS. STORMS HAVE HAD DIFFICULTY FORMING AHEAD OF THE FRONT THIS AFTERNOON GIVEN CLOUDS/COOLING SURROUNDING PRECIPITATION THIS MORNING. KEPT ISOLATED STORMS IN THE NORTHWEST HALF OF ARKANSAS OVERNIGHT...WITH A LITTLE BETTER CHANCE FOR RAIN FARTHER SOUTHEAST. COULD HAVE MORE WIDESPREAD PRECIPITATION IN THE SHORT TERM IF MCS HAPPENS TO FORM IN THE CENTRAL/SOUTHERN PLAINS...AND TRACKS ALONG THE FRONT INTO THE REGION. THERE IS AN OUTSIDE CHANCE OF OF THIS HAPPENING IN THE COMING DAYS. OTHERWISE...RAIN WILL REMAIN HIT AND MISS. TEMPERATURES WILL BE CLOSE TO NORMAL TO PERHAPS A LITTLE BELOW NORMAL. LONG TERM...SATURDAY THROUGH TUESDAY LONG TERM BEGINS WITH RIDGE TO THE SW OF AR...AND UPPER TOUGH TO THE NE OVER THE GREAT LAKES REGION. THIS SETUP HAS AR IN NW FLOW ALOFT...WITH TEMPS EXPECTED TO REMAIN NEAR NORMAL THIS COMING WEEKEND IN THIS TYPE OF UPPER FLOW. THIS SETUP ALSO BRINGS INCREASED CHANCES FOR PRECIP AS COMPLEXES OF STORMS DEVELOP TO THE NW AND MOVE SE OVER THE REGION IN THIS NW FLOW ALOFT...AROUND THE PERIPHERY OF THE UPPER LEVEL RIDGE. DO EXPECT THIS SCENARIO THROUGH MUCH OF THE WEEKEND...SO HAVE CONTINUED CHANCE POPS FOR MUCH OF THE CWA. LOOKS LIKE BEST POPS WILL REMAIN ACROSS THE NERN TWO THIRDS OF THE STATE...THOUGH SPECIFICS REGARDING EXACT TIMING OF THESE SYSTEMS IS DIFFICULT TO PIN DOWN THAT FAR OUT. THERE WILL BE SOME POTENTIAL FOR SVR WX AS WELL. BY EARLY NEXT WEEK...THE UPPER RIDGE IS EXPECTED TO EXPAND BACK TO THE NORTH AND EAST...WITH MUCH OF THE CENTRAL CONUS UNDER THE INFLUENCE OF A STRONG UPPER LEVEL RIDGE. EXPECT TEMPS TO WARM BACK ABOVE NORMAL...WITH HOTTEST TEMPS EXPECTED BY THE MIDDLE OF NEXT WEEK. && .LZK WATCHES/WARNINGS/ADVISORIES...NONE. && AVIATION...58
Hazardous weather outlook, Jun 21, 5:01 AM CDT, 14 hours 28 minutes before
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Special weather statement, Jun 21, 1:37 PM CDT, 5 hours 52 minutes before
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</html>Special weather statement, Jun 21, 6:37 PM CDT, 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
637 PM CDT TUE JUN 21 2011
ARZ037-220020-
SCOTT AR-
637 PM CDT TUE JUN 21 2011
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN SCOTT COUNTY UNTIL 715 PM
CDT...
AT 635 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WEEKS...OR 9 MILES SOUTH OF HARTFORD. THIS
STORM WAS NEARLY STATIONARY.
HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
* LOCATIONS IMPACTED INCLUDE...
OLIVER... MORGAN SPRINGS... LAKE HINKLE...
BEAUCHAMP... CAUTHRON... BATES...
WEEKS... WALKER MTN...
LITTLE PINES REC AREA... GIPSON...
COALDALE... BRAWLEY...
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
LAT...LON 3495 9439 3496 9437 3496 9431 3497 9428
3497 9424 3499 9423 3499 9420 3479 9424
3481 9446 3492 9446
TIME...MOT...LOC 2337Z 280DEG 2KT 3489 9440
58The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 7:31 PM CDT | Flash Flood Warning | LZK | Scott | 3 hr |
| Jun 21, 8:26 PM CDT | Severe Thunderstorm Warning | LZK | Polk, Scott | 49 min |
| Jun 21, 8:48 PM CDT | Severe Thunderstorm Warning | LZK | Montgomery, Polk, Scott | 42 min |
| Jun 21, 10:27 PM CDT | Flash Flood Warning | LZK | Scott | 3 hr |
| Jun 22, 11:08 AM CDT | River Flood Advisory | LZK | Arkansas, Monroe | 36 hr |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2011Every severe thunderstorm 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.