Alert archive / Nebraska / Flash Flood Watches in 2010

Flash Flood Watch 3, NWS North Platte, NE

June 20, 201011 counties in Nebraska

NWS North Platte, NE issued this flash flood watch at Jun 20, 2010, 9:07 AM CDT for 11 counties in Nebraska. It took effect at Jun 20, 2010, 1:00 PM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jun 20, 2010, 9:07 AM CDT (14:07 UTC)
In effect from: Jun 20, 2010, 1:00 PM CDT
Expired: Jun 21, 2010, 4:01 AM CDT
In force: 15 hr
Issued by: NWS North Platte, NE
Flood severity: None

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

The radar

The North Platte radar (KLNX), 95 km from the middle of the area, began a volume at 14:09 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, 2.1 hours before the alert went out and 154 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: 2118 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -9.7

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 Jun 20, 3:32 AM CDT, 5 hours 35 minutes earlier.

Area forecast discussion, Jun 20, 3:32 AM CDT, 5 hours 35 minutes before

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Hazardous weather outlook, Jun 20, 4:08 AM CDT, 4 hours 59 minutes before

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In the hours before

Special weather statement, Jun 20, 4:26 AM CDT, 4 hours 41 minutes before

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Special weather statement, Jun 20, 4:50 AM CDT, 4 hours 17 minutes before

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Special weather statement, Jun 20, 5:34 AM CDT, 3 hours 33 minutes before

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Special weather statement, Jun 20, 5:43 AM CDT, 3 hours 24 minutes before

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Special weather statement, Jun 20, 6:48 AM CDT, 2 hours 19 minutes before

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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.