Alert archive / Nevada / Flash Flood Warnings in 2018
Flash Flood Warning 87, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Jul 29, 2018, 3:28 PM PDT for Clark County, Nevada. It was in force for 3 hr. 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
- Jul 29, 2018, 3:28 PM PDT (22:28 UTC)
- Expired
- Jul 29, 2018, 6:30 PM PDT
- In force
- 3 hr
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Clark County, NV
The radar
The Las Vegas radar (KESX), 54 km from the middle of the area, began a volume at 22:32 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 |
|---|---|---|---|
| Jul 29, 3:44 PM PDT | HEAVY RAIN 1.02 | 4 Ene Spring Mountain R, NV | 1.02 INCHES OF RAIN FELL IN 30 MINUTES ON BLUE DIAMOND RIDGE. |
| Jul 29, 4:10 PM PDT | FLASH FLOOD | 3 Ese Spring Mountain R, NV | SR 159 0.5 MILE WEST OF BLUE DIAMOND HAS 4 TO 6 INCHES OF MUD...ROCKS...WATER FLOWING SWIFTLY ACROSS ROAD. |
| Jul 29, 4:10 PM PDT | FLASH FLOOD | 3 Ese Spring Mountain R, NV | SR 159 1/2 MILE WEST OF BLUE DIAMOND HAS 4-6 INCHES OF MUD...ROCKS...WATER FLOWING SWIFTLY ACROSS ROAD. |
| Jul 29, 5:00 PM PDT | FLASH FLOOD | 4 Ese Spring Mountain R, NV | FLASH FLOOD ON ARROYO RD IN BLUE DIAMOND. REPORTED VIA TWITTER. |
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, 10.5 hours before the alert went out and 43 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
- 835 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 2562 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
173
WGUS55 KVEF 292228
FFWVEF
NVC003-300130-
/O.NEW.KVEF.FF.W.0087.180729T2228Z-180730T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Las Vegas NV
328 PM PDT SUN JUL 29 2018
The National Weather Service in Las Vegas has issued a
* Flash Flood Warning for...
Central Clark County in southern Nevada...
* Until 630 PM PDT.
* At 327 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that will experience flooding include...
Blue Diamond, Enterprise, Mountains Edge, Red Rock Canyon, Spring
Valley, Summerlin and Spring Mountain Ranch.
Additional rainfall amounts of one to two inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3605 11527 3597 11521 3589 11537 3599 11545
3611 11548 3611 11534
$$
AB3 follow-up statements
982
WGUS75 KVEF 292302
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
402 PM PDT SUN JUL 29 2018
NVC003-300130-
/O.CON.KVEF.FF.W.0087.000000T0000Z-180730T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
402 PM PDT SUN JUL 29 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR
CENTRAL CLARK COUNTY...
At 401 PM PDT, Rain gauges have reported up to one inch of rain so
far. Flash flooding is expected to begin shortly.
Some locations that will experience flooding include...
Blue Diamond, Enterprise, Mountains Edge, Red Rock Canyon, Spring
Valley, Summerlin and Spring Mountain Ranch.
Additional rainfall amounts up to an inche are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3605 11527 3597 11521 3589 11537 3599 11545
3611 11548 3611 11534
$$
AB743
WGUS75 KVEF 300008
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
508 PM PDT SUN JUL 29 2018
NVC003-300130-
/O.CON.KVEF.FF.W.0087.000000T0000Z-180730T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
508 PM PDT SUN JUL 29 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM PDT FOR
CENTRAL CLARK COUNTY...
At 505 PM PDT, National Weather Service radar indicted the
thunderstorms have diminished, but the flash flooding threat
continues. The public reported mud, rocks and debris flow swiftly
across state route 159 one half mile west of Blue Diamond.
Some locations that will experience flooding include...
Blue Diamond, Enterprise, Mountains Edge, Red Rock Canyon, Spring
Valley, Summerlin and Spring Mountain Ranch.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3605 11527 3597 11521 3589 11537 3599 11545
3611 11548 3611 11534
$$
SC474
WGUS75 KVEF 300128
FFSVEF
Flash Flood Statement
National Weather Service Las Vegas NV
628 PM PDT SUN JUL 29 2018
NVC003-300133-
/O.EXP.KVEF.FF.W.0087.000000T0000Z-180730T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark NV-
628 PM PDT SUN JUL 29 2018
...THE FLASH FLOOD WARNING FOR CENTRAL CLARK COUNTY WILL EXPIRE AT
630 PM PDT...
Washes will continue to be running for the next few hours. Runoff
and ponding of water from the earlier heavy rain will continue to
cause minor flooding issues. Flash flooding is no longer expected to
pose a threat. Please continue to heed any remaining road closures.
LAT...LON 3605 11527 3597 11521 3589 11537 3599 11545
3611 11548 3611 11534
$$
SCThe office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 2:39 PM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Jul 29, 2:51 PM PDT | Areal Flood Advisory | VEF | Clark | 39 min |
| Jul 29, 2:55 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 50 min |
| Jul 29, 3:02 PM PDT | Flash Flood Warning | VEF | Clark | 3 hr |
Nearby
Flash Flood Warnings in Nevada, 2018Every flash flood warning in 2018
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.