Alert archive / Nevada / Flash Flood Warnings in 2012
Flash Flood Warning 187, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Sep 5, 2012, 3:13 PM PDT for Clark County, Nevada. It was in force for 72 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 5, 2012, 3:13 PM PDT (22:13 UTC)
- Expired
- Sep 5, 2012, 4:25 PM PDT
- In force
- 72 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 36 km from the middle of the area, began a volume at 22:13 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 5, 3:57 PM PDT | HEAVY RAIN 0.94 | 5 Ene Sloan, NV | A CCRFCD RAIN GAUGE AT THE PITTMAN EAST DETENTION BASIN MEASURED A TOTAL OF 0.94 INCHES OF RAIN WITH 0.79 INCH FALLING IN AN HOUR. |
| Sep 5, 4:00 PM PDT | FLASH FLOOD | 5 Ssw Green Valley, NV | HENDERSON FIRE DEPARTMENT REPORTED SEVERAL INCHES OF WATER FLOODED SUNRIDGE HEIGHTS AND CORONADO CENTER DRIVE AS WELL AS VOLUNTEER BOULEVARD AND EXECUTIVE AIRPORT ROAD. |
| Sep 5, 4:00 PM PDT | FLASH FLOOD | Seven Hills, NV | LAS VEGAS AREA BROADCAST MEDIA HAD PICTURES SHOWING AT LEAST 6 INCHES OF FLOWING WATER ON SUNRISE HEIGHTS PARKWAY BETWEEN SEVEN HILLS AND PECOS RIDGE. ALSO A LARGE AMOUNT OF MUD...ROCKS AND FLOWING WATER WASHED THROUGH THE PARKING LOT OF AN APARTMENT COMPLEX I |
| Sep 5, 4:05 PM PDT | HEAVY RAIN 0.5 | 4 Ssw Green Valley, NV | A NWS EMPLOYEES WIFE REPORTED 2 TO 3 INCHES OF FLOWING WATER AT THE INTERSECTION OF CORONADO CENTER DRIVE AND HORIZON RIDGE PARKWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.2 hours before the alert went out and 59 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
- 70 J/kg
- Mixed-layer CIN
- -294 J/kg
- Mixed-layer LCL
- 2568 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
491 WGUS55 KVEF 052213 FFWVEF NVC003-060015- /O.NEW.KVEF.FF.W.0187.120905T2213Z-120906T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 313 PM PDT WED SEP 5 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL CLARK COUNTY IN SOUTHERN NEVADA... * UNTIL 515 PM PDT. * AT 310 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR ANTHEM...OR 8 MILES SOUTHWEST OF HENDERSON. THE STORM PRODUCING VERY HEAVY RAIN WAS NEARLY STATIONARY. ROADS THAT MAY BE IMPACTED INCLUDE VOLUNTEER BOULEVARD AND EXECUTIVE AIRPORT DRIVE IN HENDERSON. * LOCATIONS IMPACTED INCLUDE... HENDERSON...ANTHEM...SEVEN HILLS...SILVERADO RANCH...SOUTHERN HIGHLANDS AND GREEN VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3604 11521 3604 11490 3586 11499 3590 11521 $$ STACHELSKI
2 follow-up statements
079 WGUS75 KVEF 052247 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 347 PM PDT WED SEP 5 2012 NVC003-060015- /O.CON.KVEF.FF.W.0187.000000T0000Z-120906T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 347 PM PDT WED SEP 5 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM PDT FOR CENTRAL CLARK COUNTY... AT 340 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN. THIS STORM WAS LOCATED NEAR ANTHEM...OR 7 MILES SOUTHWEST OF HENDERSON. THE THUNDERSTORM WITH EXCESSIVE RAIN WAS NEARLY STATIONARY. VERY HEAVY RAINFALL HAS TAKEN PLACE IN THE FAR SOUTHWESTERN PORTION OF HENDERSON WITH SEVERAL AUTOMATED GAUGES REPORTING BETWEEN THREE QUARTERS OF AN INCH AND AN INCH OF RAIN. THE HEAVIEST RAIN HAS GENERALLY FALLEN ALONG AND SOUTH OF SAINT ROSE PARKWAY. BE ALERT FOR POTENTIAL FLASH FLOODING INCLUDING ROCKS AND MUD WASHING ONTO ROADS INCLUDING VOLUNTEER BOULEVARD AND EXECUTIVE AIRPORT DRIVE NEAR THE HENDERSON EXECUTIVE AIRPORT. LOCATIONS IMPACTED INCLUDE... HENDERSON...SEVEN HILLS...SILVERADO RANCH AND SOUTHERN HIGHLANDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED ON AREA ROADWAYS...AROUND UNDERPASSES... AND IN NORMALLY DRY WASHES AND LOW LYING AREAS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3604 11521 3604 11490 3586 11499 3590 11521 $$ STACHELSKI
019 WGUS75 KVEF 052325 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 425 PM PDT WED SEP 5 2012 NVC003-052334- /O.CAN.KVEF.FF.W.0187.000000T0000Z-120906T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CLARK NV- 425 PM PDT WED SEP 5 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL CLARK COUNTY... THUNDERSTORMS HAVE WEAKENED OVER THE LAS VEGAS VALLEY. THE THREAT OF HEAVY RAIN IN HENDERSON HAS ENDED AND THEREFORE THE FLASH FLOOD WARNING WAS CANCELLED. BE ALERT FOR SLICK ROADS AND POSSIBLE LINGERING MUD AND ROCKS WASHED ONTO ON ANY ROADS IF TRAVELING. LAT...LON 3604 11521 3604 11490 3586 11499 3590 11521 $$ STACHELSKI
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 4:24 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 40 min |
Nearby
Flash Flood Warnings in Nevada, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.