Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 121, NWS Las Vegas, NV
NWS Las Vegas, NV issued this flash flood warning at Aug 18, 2012, 12:25 PM MST for Mohave County, Arizona. It was in force for 78 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2012, 12:25 PM MST (19:25 UTC)
- Expired
- Aug 18, 2012, 1:43 PM MST
- In force
- 78 min
- Issued by
- NWS Las Vegas, NV
- Area
- Storm-based polygon
- Flood severity
- None
County Mohave County, AZ
The radar
The Las Vegas radar (KESX), 113 km from the middle of the area, began a volume at 19:28 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 7.4 hours before the alert went out and 189 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
- 124 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 1298 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
050 WGUS55 KVEF 181925 FFWVEF AZC015-182130- /O.NEW.KVEF.FF.W.0121.120818T1925Z-120818T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LAS VEGAS NV 1225 PM MST SAT AUG 18 2012 THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL MOHAVE COUNTY IN NORTHWEST ARIZONA... * UNTIL 230 PM MST. * AT 1215 PM MST...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING FROM A THUNDERSTORM NEAR HUALAPAI MOUNTAIN PARK...OR 11 MILES SOUTHEAST OF KINGMAN...MOVING NORTHEAST AT 10 MPH. AN AUTOMATED GAGE NEAR HUALAPAI MOUNTAIN ROAD HAS REPORTED 1.10 INCHES IN THE PAST HOUR. * LOCATIONS IMPACTED INCLUDE...HUALAPAI MOUNTAIN. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. 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 3516 11389 3511 11373 3500 11387 3513 11397 $$ PIERCE
2 follow-up statements
089 WGUS75 KVEF 182002 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 102 PM MST SAT AUG 18 2012 AZC015-182130- /O.CON.KVEF.FF.W.0121.000000T0000Z-120818T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 102 PM MST SAT AUG 18 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 PM MST FOR CENTRAL MOHAVE COUNTY... AT 1250 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WEAKENING AS IT NEARS INTERSTATE 40 EAST OF KINGMAN. THIS STORM WAS LOCATED NEAR HUALAPAI MOUNTAIN PARK...OR 12 MILES EAST OF KINGMAN...MOVING EAST AT 10 MPH. HEAVY RAIN HAS LEAD TO FLASH FLOODING OF NORMALLY DRY WASHES AND DRAINAGES IN THE AREA. WATER ACROSS HUALAPAI MOUNTAIN ROAD NEAR MILE MARKER 10 IS SLOWING ACCESS TO AND FROM HUALAPAI MOUNTAIN PARK. LOCATIONS IMPACTED INCLUDE...HUALAPAI MOUNTAIN ROAD...HUALAPAI MOUNTAIN PARK. PRECAUTIONARY/PREPAREDNESS ACTIONS... FLASH FLOODING IS EXPECTED IN WASHES...LOW WATER CROSSINGS AND ON AREA ROADWAYS. FLASH FLOODING IS NATURES NUMBER ONE KILLER. TO ESCAPE RISING WATER...MOVE TO HIGHER GROUND. NEVER TRY TO CROSS A FLOODED ROADWAY OR WALK THROUGH FLOODWATERS. TURN AROUND...DONT DROWN! REPORT FLOODING BY POSTING YOUR REPORT TO THE LAS VEGAS NATIONAL WEATHER SERVICE FACEBOOK PAGE...OR BY USING THE TWITTER HASHTAG... NWSVEGAS. && LAT...LON 3516 11389 3511 11373 3500 11387 3513 11397 $$ PIERCE
190 WGUS75 KVEF 182043 FFSVEF FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LAS VEGAS NV 143 PM MST SAT AUG 18 2012 AZC015-182051- /O.CAN.KVEF.FF.W.0121.000000T0000Z-120818T2130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MOHAVE AZ- 143 PM MST SAT AUG 18 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL MOHAVE COUNTY... THE THUNDERSTORM THAT PRODUCED FLASH FLOODING ON HUALAPAI MOUNTAIN HAS WEAKENED. RUNOFF IN NORMALLY DRY WASHES AND SMALL DRAINAGE AREAS ON HUALAPAI MOUNTAIN HAVE RECEDED. THE FLASH FLOOD WARNING HAS BEEN CANCELLED. LAT...LON 3516 11389 3511 11373 3500 11387 3513 11397 $$ PIERCE
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 6:21 PM MST | Areal Flood Advisory | VEF | Mohave | 106 min |
| Aug 18, 2:43 PM MST | Severe Thunderstorm Warning | VEF | Mohave | 47 min |
| Aug 18, 3:45 PM MST | Flash Flood Warning | VEF | Mohave | 94 min |
| Aug 18, 4:56 PM MST | Flash Flood Warning | VEF | Mohave | 2 hr |
Nearby
Flash Flood Warnings in Arizona, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.