Alert archive / Nebraska / Flash Flood Watches in 2007

Flash Flood Watch 4, NWS Hastings, NE

May 6, 200724 counties in Nebraska; 6 counties in Kansas

NWS Hastings, NE issued this flash flood watch at May 6, 2007, 5:13 AM CDT for 24 counties in Nebraska; 6 counties in Kansas. It took effect at May 6, 2007, 12:00 PM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: May 6, 2007, 5:13 AM CDT (10:13 UTC)
In effect from: May 6, 2007, 12:00 PM CDT
Expired: May 6, 2007, 11:50 PM CDT
In force: 12 hr
Issued by: NWS Hastings, NE
Flood severity: None

All 30 counties

Jewell County, KS, Mitchell County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Buffalo County, NE, Clay County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Polk County, NE, Sherman County, NE, Thayer County, NE, Valley County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 27 km from the middle of the area, began a volume at 10:14 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 10.2 hours before the alert went out and 179 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: 66 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 3132 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Hastings, NE wrote its last area forecast discussion before this flash flood watch went out at May 6, 5:04 AM CDT, 9 minutes earlier.

Area forecast discussion, May 6, 5:04 AM CDT, 9 minutes before

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Hazardous weather outlook, May 6, 4:17 AM CDT, 56 minutes before

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In the hours before

Special weather statement, May 5, 11:19 PM CDT, 5 hours 54 minutes before

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Special weather statement, May 5, 11:23 PM CDT, 5 hours 50 minutes before

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Local storm report, May 5, 11:37 PM CDT, 5 hours 36 minutes before

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Local storm report, May 6, 2:53 AM CDT, 2 hours 20 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 9:10 PM CDT	Severe Thunderstorm Warning	GID	Greeley, Howard	50 min
May 5, 9:22 PM CDT	Tornado Warning	GID	Greeley	38 min
May 5, 10:16 PM CDT	Severe Thunderstorm Warning	GID	Thayer	59 min
May 5, 10:45 PM CDT	Severe Thunderstorm Warning	GID	Fillmore	51 min
May 5, 8:36 PM CDT	Tornado Warning	GID	Mitchell	54 min
May 5, 9:04 PM CDT	Tornado Warning	GID	Mitchell	41 min
May 5, 9:32 PM CDT	Tornado Warning	GID	Mitchell	26 min
May 5, 9:36 PM CDT	Severe Thunderstorm Warning	GID	Jewell	38 min
May 5, 10:02 PM CDT	Severe Thunderstorm Warning	GID	Osborne	43 min
May 5, 10:25 PM CDT	Severe Thunderstorm Warning	GID	Smith	33 min

Nearby

Flash Flood Watches in Nebraska, 2007 Flash Flood Watches in Kansas, 2007 Every flash flood watch in 2007

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.