Alert archive / Nebraska / Flash Flood Watches in 2010

Flash Flood Watch 5, NWS North Platte, NE

July 3, 201011 counties in Nebraska

NWS North Platte, NE issued this flash flood watch at Jul 3, 2010, 3:03 PM CDT for 11 counties in Nebraska. It took effect at Jul 3, 2010, 10:00 PM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jul 3, 2010, 3:03 PM CDT (20:03 UTC)
In effect from: Jul 3, 2010, 10:00 PM CDT
Expired: Jul 4, 2010, 3:44 AM CDT
In force: 6 hr
Issued by: NWS North Platte, NE
Flood severity: None

Counties Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Garfield County, NE, Holt County, NE, Keya Paha County, NE, Loup County, NE, Rock County, NE, Thomas County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 91 km from the middle of the area, began a volume at 20:05 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.1 hours before the alert went out and 155 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: 534 J/kg
Mixed-layer CIN: -278 J/kg
Mixed-layer LCL: 801 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 North Platte, NE wrote its last area forecast discussion before this flash flood watch went out at Jul 3, 4:00 AM CDT, 11 hours 3 minutes earlier.

Area forecast discussion, Jul 3, 4:00 AM CDT, 11 hours 3 minutes before

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Hazardous weather outlook, Jul 3, 4:42 AM CDT, 10 hours 21 minutes before

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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 2, 7:18 PM CDT	Severe Thunderstorm Warning	LBF	Garden, Grant, Sheridan	57 min
Jul 2, 8:13 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	62 min
Jul 3, 5:39 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	36 min
Jul 3, 5:50 PM CDT	Tornado Warning	LBF	Cherry, Sheridan	25 min
Jul 3, 6:17 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	43 min

Nearby

Flash Flood Watches in Nebraska, 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.