Alert archive / Arkansas / Flash Flood Warnings in 2011
Flash Flood Warning 91, NWS Memphis, TN
NWS Memphis, TN issued this flash flood warning at Apr 27, 2011, 9:12 PM CDT for Lawrence County, Randolph County, Arkansas. It was in force for 10 hr. 1 report 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 27, 2011, 9:12 PM CDT (02:12 UTC)
- Expired
- Apr 28, 2011, 7:15 AM CDT
- In force
- 10 hr
- Issued by
- NWS Memphis, TN
- Area
- Storm-based polygon
- Flood severity
- Major
Counties Lawrence County, AR, Randolph County, AR
The radar
The Memphis radar (KNQA), 134 km from the middle of the area, began a volume at 02:15 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 28, 6:30 AM CDT | FLASH FLOOD | Pocahontas, AR | A LEVEE BREACH ALONG THE BLACK RIVER HAS RESULTED IN FLOODING IN EAST POCAHONTAS. SEVERAL BUSINESSES AND THE AIRPORT ARE FLOODED. HIGHWAY 67 IS CLOSED FROM THE CLAY COUNTY LINE TO SHANNON. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Little Rock, AR (KLZK), launched 00:00Z, 2.2 hours before the alert went out and 174 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
632 WGUS54 KMEG 280212 FFWMEG ARC075-121-280615- /O.NEW.KMEG.FF.W.0091.110428T0212Z-110428T0615Z/ /00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MEMPHIS TN 912 PM CDT WED APR 27 2011 THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A * FLASH FLOOD WARNING FOR A LEVEE FAILURE IN... LAWRENCE COUNTY IN EASTERN ARKANSAS... RANDOLPH COUNTY IN EASTERN ARKANSAS... THIS INCLUDES THE CITY OF POCAHONTAS... * UNTIL 115 AM CDT * AT 911 PM CDT...A LEVEE ON THE BLACK RIVER AT POCAHONTAS FAILED CAUSING FLASH FLOODING OF IMMEDIATELY SURROUNDING AREAS...MAINLY ON THE EAST BANK OF THE RIVER. * LOCATIONS IMPACTED INCLUDE COLLEGE CITY...O'KEAN...POCAHONTAS AND PORTIA PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. && LAT...LON 3607 9110 3628 9103 3627 9081 3611 9081 $$ BORGHOFF
1 follow-up statement
238 WGUS54 KMEG 280609 FFWMEG ARC075-121-281215- /O.EXT.KMEG.FF.W.0091.000000T0000Z-110428T1215Z/ /00000.3.DM.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MEMPHIS TN 109 AM CDT THU APR 28 2011 THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS EXTENDED THE * FLASH FLOOD WARNING FOR A LEVEE FAILURE IN... LAWRENCE COUNTY IN EASTERN ARKANSAS... RANDOLPH COUNTY IN EASTERN ARKANSAS... THIS INCLUDES THE CITY OF POCAHONTAS... * UNTIL 715 AM CDT * AT 108 AM CDT...A LEVEE ON THE BLACK RIVER AT POCAHONTAS FAILED CAUSING FLASH FLOODING OF IMMEDIATELY SURROUNDING AREAS...MAINLY ON THE EAST BANK OF THE RIVER. * LOCATIONS IMPACTED INCLUDE COLLEGE CITY...O'KEAN...POCAHONTAS AND PORTIA PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. && LAT...LON 3607 9110 3628 9103 3627 9081 3611 9081 $$
The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 7:14 AM CDT | Flash Flood Warning | MEG | Lawrence, Randolph | 3 hr |
Nearby
Flash Flood Warnings in Arkansas, 2011Every flash flood 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.