Alert archive / Nebraska / Flash Flood Watches in 2007
Flash Flood Watch 10, NWS North Platte, NE
NWS North Platte, NE issued this flash flood watch at Jul 28, 2007, 12:10 PM MDT for 4 counties in Nebraska. It took effect at Jul 28, 2007, 6:00 PM MDT. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 28, 2007, 12:10 PM MDT (18:10 UTC)
- In effect from
- Jul 28, 2007, 6:00 PM MDT
- Expired
- Jul 28, 2007, 8:42 PM MDT
- In force
- 3 hr
- Issued by
- NWS North Platte, NE
Counties Chase County, NE, Frontier County, NE, Hayes County, NE, Perkins County, NE
The radar
The Goodland radar (KGLD), 144 km from the middle of the area, began a volume at 18:13 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
Denver, CO (KDNR), launched 12:00Z, 6.2 hours before the alert went out and 191 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
- 27 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 939 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 38 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 North Platte, NE wrote its last area forecast discussion before this flash flood watch went out at Jul 28, 1:43 AM MDT, 10 hours 27 minutes earlier.
Area forecast discussion, Jul 28, 1:43 AM MDT, 10 hours 27 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORTH PLATTE NE 243 AM CDT SAT JUL 28 2007 .DISCUSSION... ONGOING CONVECTION ENTERING SOUTHWEST NEBRASKA WILL BE THE PRIMARY FOCUS TODAY AND TONIGHT AS IT DEVELOPS NORTHEAST. MODELS ARE IN AGREEMENT WITH HEAVY RAINFALL TO DEVELOP INTO PORTIONS OF WESTERN NEBRASKA TODAY BUT DIFFER IN PLACEMENT. GFS SOLUTION IS CLOSER TO ONGOING CONVECTION WITH FORECAST TRENDED IN THIS DIRECTION BUT MAINTAINING A FURTHER DISPLACEMENT SOUTH OF HIGHER QPF FORECAST AMOUNTS. WEAK WIND FLOW ALOFT MAINTAINING A SLOW TRANSITION OF CONVECTION EASTWARD WITH WARM FRONT THAN EXTENDS FROM SOUTHWEST NEBRASKA ACROSS CENTRAL KANSAS AT 07Z TO LIFT NORTHEAST INTO SOUTHWEST NEBRASKA THROUGH 09Z. HIGHEST RADAR REFLECTIVITY IS ON THE LEADING EDGE OF CONVECTION WERE H85 WINDS ARE FROM THE EAST AT 15 KNOTS PER RED WILLOW PROFILER...AND MORE EASTERLY THAN ADVERTISED IN THE MODEL. TODAY WAVE DROPS SOUTHEAST AND WILL ENHANCE LIFT FOR STORM DEVELOP OVER THE SOUTHERN SANDHILLS INTO SOUTHWEST NEBRASKA. FLOOD WATCH REMAINS IN EFFECT THROUGH 21Z THIS AFTERNOON WITH INCREASING RIDGING FROM THE WEST TO LIMIT HEAVY RAINFALL THREAT BEYOND THIS AFTERNOON. IF THE HEAVY RAIN THREAT SHIFTS FURTHER NORTH THE FLOOD WATCH MAY NEED TO BE SHIFTED NORTH. GFS DOES CARRY H250 JETSTREAM AXIS NORTH WITH RIGHT REAR QUADRANT TO ENHANCE LIFT TO MAINTAIN CONVECTION INTO TONIGHT. TEMPERATURES TODAY WILL BE IMPACTED BY THE CONVECTION AND CLOUD COVERAGE WITH READINGS COOLED A FEW DEGREES ACROSS THE WEST. TONIGHT INTO SUNDAY THE UPPER RIDGE AXIS BUILDS EASTWARD WITH SEVERAL EMBEDDED WAVES TO DROP SOUTHEAST. THE SURFACE FRONT WILL PUSH SOUTH WITH CONVECTION TO LINGER ACROSS THE SOUTHWEST BUT DECREASE IN AREAL COVERAGE. HOWEVER MOISTURE BEING DRAWN NORTH ON THE PLAINS WILL KEEP CONSIDERABLE CLOUDINESS IN THE FORECAST WITH A CHANCE FOR EARLY MORNING STRATUS AND FOG SUNDAY AND MONDAY MORNING. MONDAY THE MODEL CLOSES AN UPPER LOW OFF OVER NEBRASKA WITH THE POTENTIAL FOR SHOWERS AND THUNDERSTORMS THROUGH MIDWEEK. THE QPF FORECASTED WILL LIKELY LIMIT FULL HEATING THROUGH MIDWEEK WITH HIGHS LOWERED A FEW DEGREES. && .AVIATION... MIXED VFR AND IFR CONDITIONS ARE EXPECTED ACROSS BOTH THE 274 AND 264 TWB ROUTES AND THE WRN FLANK OF 098 TODAY AND TONIGHT. A WARM FRONT ACROSS NWRN KS WILL LIFT VERY SLOWLY NORTH TODAY WITH SCATTERED TO NUMEROUS SHRA/TSTM ACTIVITY CONTINUING. THERE IS A LIMITED POSSIBILITY THE CONVECTION ACROSS NERN COLO AND WRN/SWRN NEB COULD DISSIPATE LATE THIS MORNING AND REDEVELOP LATE THIS AFTN OR THIS EVENING PRODUCING A NARROW WINDOW OF VFR CONDITIONS DURING THE AFTERNOON. THIS IS SPECULATIVE. THUS THE GENERAL FCST IS FOR MIXED IFR AND MVFR CONDITIONS FOR MOST OF THE NEXT 24 HRS. && .LBF WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH THROUGH THIS AFTERNOON FOR NEZ022-056>059- 069>071. && TLK/CDC
Hazardous weather outlook, Jul 28, 4:32 AM MDT, 7 hours 38 minutes before
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</html>The office that day
Everything else NWS North Platte, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 2:40 AM MDT | Flash Flood Warning | LBF | Hayes | 3 hr |
| Jul 28, 4:12 AM MDT | Flash Flood Warning | LBF | Frontier | 3 hr |
Nearby
Flash Flood Watches in Nebraska, 2007Every 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.