Alert archive / Arkansas / Flash Flood Watches in 2012
Flash Flood Watch 1, NWS Little Rock, AR
NWS Little Rock, AR issued this flash flood watch at Mar 18, 2012, 3:10 PM CDT for 20 counties in Arkansas. It took effect at Mar 19, 2012, 7:00 PM CDT. It was in force for 46 hr.
The area
The counties it named.
The facts
- Issued
- Mar 18, 2012, 3:10 PM CDT (20:10 UTC)
- In effect from
- Mar 19, 2012, 7:00 PM CDT
- Expired
- Mar 21, 2012, 4:58 PM CDT
- In force
- 46 hr
- Issued by
- NWS Little Rock, AR
- Flood severity
- None
Counties Baxter County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Conway County, AR, Dallas County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Lincoln County, AR, Marion County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Pulaski County, AR, Saline County, AR
The radar
The Little Rock radar (KLZK), 50 km from the middle of the area, began a volume at 20:15 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.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 8.2 hours before the alert went out and 295 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
- 771 J/kg
- Mixed-layer CIN
- -226 J/kg
- Mixed-layer LCL
- 892 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 239 m²/s²
- 0-3 km storm-relative helicity
- 243 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 18, 2:56 PM CDT, 14 minutes earlier.
Area forecast discussion, Mar 18, 2:56 PM CDT, 14 minutes before
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</html>Hazardous weather outlook, Mar 18, 5:15 AM CDT, 9 hours 55 minutes before
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</html>The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 4:12 AM CDT | Flood Watch | LZK | Baxter, Marion, Pike | 11 hr |
Nearby
Flash Flood Watches in Arkansas, 2012Every flash flood watch 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.