Alert archive / Nevada / Flash Flood Watches in 2008
Flash Flood Watch 7, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood watch at Aug 5, 2008, 10:19 AM PDT for Clark County, Lincoln County, Nye County, Nevada; Inyo County, San Bernardino County, California; Mohave County, Arizona. It took effect at Aug 5, 2008, 11:00 AM PDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Aug 5, 2008, 10:19 AM PDT (17:19 UTC)
- In effect from
- Aug 5, 2008, 11:00 AM PDT
- Expired
- Aug 5, 2008, 9:46 PM PDT
- In force
- 11 hr
- Issued by
- NWS Las Vegas, NV
- Flood severity
- None
Counties Mohave County, AZ, Inyo County, CA, San Bernardino County, CA, Clark County, NV, Lincoln County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 110 km from the middle of the area, began a volume at 17:18 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
Mercury/Desert R, NV (KDRA), launched 12:00Z, 5.3 hours before the alert went out and 37 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
- 33 J/kg
- Mixed-layer CIN
- -264 J/kg
- Mixed-layer LCL
- 2312 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- -15 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 Las Vegas, NV wrote its last area forecast discussion before this flash flood watch went out at Aug 5, 10:10 AM PDT, 9 minutes earlier.
Area forecast discussion, Aug 5, 10:10 AM PDT, 9 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Aug 5, 6:29 AM PDT, 3 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAS VEGAS NV 629 AM PDT TUE AUG 5 2008 AZZ001>003-036-CAZ519>527-NVZ014>022-060700- NORTHWEST PLATEAU-LOWER COLORADO RIVER VALLEY-NORTHWEST DESERTS- LAKE MEAD NATIONAL RECREATION AREA-EASTERN SIERRA SLOPES- OWENS VALLEY-WHITE MOUNTAINS OF INYO COUNTY- DEATH VALLEY NATIONAL PARK-WESTERN MOJAVE DESERT- EASTERN MOJAVE DESERT-MORONGO BASIN-CADIZ BASIN- SAN BERNARDINO COUNTY-UPPER COLORADO RIVER VALLEY- ESMERALDA AND CENTRAL NYE COUNTY-LINCOLN COUNTY- NORTHEAST CLARK COUNTY-WESTERN CLARK AND SOUTHERN NYE COUNTY- SHEEP RANGE-SPRING MOUNTAINS-LAS VEGAS VALLEY- SOUTHERN CLARK COUNTY- 629 AM PDT TUE AUG 5 2008 /629 AM MST TUE AUG 5 2008/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST ARIZONA...SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS SOUTHEAST NEVADA... NORTHWEST ARIZONA AND EASTERN SAN BERNARDINO COUNTY CALIFORNIA THIS AFTERNOON AND EVENING. HEAVY RAIN WILL BE POSSIBLE AND ISOLATED FLASH FLOODING WILL BE THE MAIN HAZARDOUS WEATHER THREAT IN THESE AREAS...THOUGH STRONG WIND GUSTS AND HAIL WILL ALSO BE POSSIBLE WITH A FEW STORMS. ISOLATED THUNDERSTORMS ARE EXPECTED OVER INYO COUNTY CALIFORNIA AND ADJOINING AREAS OF SOUTHWEST NEVADA. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY A MOIST AND UNSTABLE AIR MASS WILL REMAIN IN PLACE WEDNESDAY AND THURSDAY FOR CONTINUED THUNDERSTORMS MAINLY DURING THE AFTERNOON AND EVENING HOURS. ISOLATED FLASH FLOODING WILL CONTINUE TO BE THE MAIN HAZARDOUS WEATHER THREAT. DRIER SOUTHWEST FLOW IS FORECAST TO DEVELOP OVER SOUTHEAST CALIFORNIA AND SOUTHERN NEVADA FOR THE WEEKEND AND EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ADAIR
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:45 PM PDT | Areal Flood Advisory | VEF | Clark | 2 hr |
| Aug 5, 1:44 PM PDT | Areal Flood Advisory | VEF | Clark, Nye | 3 hr |
| Aug 5, 1:59 PM PDT | Areal Flood Advisory | VEF | Clark, Lincoln, Nye | 2 hr |
| Aug 5, 2:25 PM PDT | Areal Flood Advisory | VEF | Clark | 110 min |
| Aug 5, 3:40 PM PDT | Areal Flood Advisory | VEF | Lincoln | 3 hr |
| Aug 5, 4:48 PM PDT | Severe Thunderstorm Warning | VEF | Clark | 42 min |
| Aug 5, 4:16 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 4, 5:35 PM PDT | Areal Flood Advisory | VEF | Mohave | 115 min |
| Aug 4, 5:47 PM PDT | Flash Flood Warning | VEF | Mohave | 117 min |
| Aug 5, 2:08 PM PDT | Areal Flood Advisory | VEF | 88 min |
Nearby
Flash Flood Watches in Nevada, 2008Flash Flood Watches in California, 2008Flash Flood Watches in Arizona, 2008Every flash flood watch in 2008
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.