Alert archive / Arkansas / Flash Flood Watches in 2010

Flash Flood Watch 3, NWS Tulsa, OK

July 12, 20104 counties in Arkansas

NWS Tulsa, OK issued this flash flood watch at Jul 12, 2010, 4:14 AM CDT for 4 counties in Arkansas. It took effect at Jul 12, 2010, 7:00 AM CDT. It was in force for 24 hr.

The area

The counties it named.

The facts

Issued: Jul 12, 2010, 4:14 AM CDT (09:14 UTC)
In effect from: Jul 12, 2010, 7:00 AM CDT
Expired: Jul 13, 2010, 7:00 AM CDT
In force: 24 hr
Issued by: NWS Tulsa, OK
Flood severity: None

Counties Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR

The radar

The Western Arkansas radar (KSRX), 105 km from the middle of the area, began a volume at 09:14 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 00:00Z, 9.2 hours before the alert went out and 82 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: 2169 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 1374 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.5

Open this sounding in Storm Lab

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 Tulsa, OK wrote its last area forecast discussion before this flash flood watch went out at Jul 12, 4:02 AM CDT, 12 minutes earlier.

Area forecast discussion, Jul 12, 4:02 AM CDT, 12 minutes before

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Hazardous weather outlook, Jul 11, 9:50 PM CDT, 6 hours 24 minutes before

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In the hours before

Special weather statement, Jul 12, 3:31 AM CDT, 43 minutes before

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Special weather statement, Jul 12, 3:47 AM CDT, 27 minutes before

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The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 3:31 AM CDT	Special Weather Statement	TSA	Tulsa	29 min
Jul 12, 3:47 AM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	28 min
Jul 12, 4:26 AM CDT	Excessive Heat Watch	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	23 hr
Jul 12, 1:41 PM CDT	Excessive Heat Warning	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	11 days
Jul 12, 4:34 PM CDT	Special Weather Statement	TSA	LeFlore	41 min
Jul 12, 4:48 PM CDT	Special Weather Statement	TSA	LeFlore	42 min

Nearby

Flash Flood Watches in Arkansas, 2010 Every flash flood watch in 2010

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.