Alert archive / Arizona / Flash Flood Warnings in 2017
Flash Flood Warning 13, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 24, 2017, 7:19 AM MST for Maricopa County, Pinal County, Arizona. It was in force for 3 hr. 1 report 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 24, 2017, 7:19 AM MST (14:19 UTC)
- Expired
- Jul 24, 2017, 10:15 AM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties Maricopa County, AZ, Pinal County, AZ
The radar
The Phoenix radar (KIWA), 37 km from the middle of the area, began a volume at 14:20 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 24, 9:17 AM MST | FLASH FLOOD | 1 Sw Apache Junction, AZ | LIVE RESCUE ON BROADCAST MEDIA UNDERWAY, 16TH AVE AT SAGUARO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Phoenix, AZ (KPSR), launched 12:00Z, 2.3 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
- 1113 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 860 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
226 WGUS55 KPSR 241419 FFWPSR AZC013-021-241715- /O.NEW.KPSR.FF.W.0013.170724T1419Z-170724T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Phoenix AZ 719 AM MST MON JUL 24 2017 The National Weather Service in Phoenix has issued a * Flash Flood Warning for... Maricopa County in south central Arizona... Pinal County in southeastern Arizona... * Until 1015 AM MST * At 718 AM MST, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Up to one inch of rain has already fallen and thunderstorms with heavy rainfall rates continue to develop and train over the area. Flash flooding is expected to begin shortly, especially in areas that saw heavy rainfall last evening. * Some locations that will experience flooding include... Mesa, Scottsdale, Gilbert, Apache Junction, Fountain Hills, Sugarloaf Mountain, Ballantine Trailhead, Round Valley, East Mesa, Queen Creek, Carefree, Granite Reef Dam, Gold Camp, Falcon Field Airport and Lost Dutchman State Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please report flooding to your local law enforcement agency when you can do so safely. Remember, Turn Around, Don't Drown. Find another route or way of travel and do not drive through flooded washes and low water crossings. && LAT...LON 3387 11143 3326 11124 3323 11172 3381 11196 $$ NOLTE
3 follow-up statements
715 WGUS75 KPSR 241516 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 816 AM MST MON JUL 24 2017 AZC013-021-241715- /O.CON.KPSR.FF.W.0013.000000T0000Z-170724T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Maricopa AZ-Pinal AZ- 816 AM MST MON JUL 24 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM MST FOR MARICOPA AND PINAL COUNTIES... At 813 AM MST, Doppler radar and automated rain gauges indicated showers and thunderstorms producing heavy rain over the warned area of the Phoenix Metropolitan East Valley. One hour rainfall observations range from half an inch to three quarter an inch of rain on top of the rainfall that occurred this morning and last evening. Flash flooding is expected to begin shortly. Thunderstorms continue to train over the warning area, producing additional heavy rainfall. Some locations that will experience flooding include... Mesa, Scottsdale, Gilbert, Apache Junction, Fountain Hills, Sugarloaf Mountain, Ballantine Trailhead, Round Valley, East Mesa, Queen Creek, Carefree, Granite Reef Dam, Gold Camp, Falcon Field Airport and Lost Dutchman State Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Please report flooding to your local law enforcement agency when you can do so safely. && LAT...LON 3387 11143 3326 11124 3323 11172 3381 11196 $$ Nolte
853 WGUS75 KPSR 241541 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 841 AM MST MON JUL 24 2017 AZC013-021-241715- /O.CON.KPSR.FF.W.0013.000000T0000Z-170724T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Maricopa AZ-Pinal AZ- 841 AM MST MON JUL 24 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM MST FOR MARICOPA AND PINAL COUNTIES... At 834 AM MST, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain over the warned area. Three quarters to one inch of rain has already fallen over portions of Gold Canyon and Apache Junction. Areas washes already have streamflow in them and additional runoff expansion is expected. Weekes Wash is possibly exceeding bankfull conditions and maybe impacting residences and trailer parks along its banks. Some locations that will experience flooding include... Mesa, Scottsdale, Gilbert, Apache Junction, Fountain Hills, Sugarloaf Mountain, Ballantine Trailhead, Round Valley, East Mesa, Queen Creek, Carefree, Granite Reef Dam, Gold Camp, Falcon Field Airport and Lost Dutchman State Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Please report flooding to your local law enforcement agency when you can do so safely. && LAT...LON 3387 11143 3326 11124 3323 11172 3381 11196 $$ Nolte
234 WGUS75 KPSR 241712 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 1012 AM MST MON JUL 24 2017 AZC013-021-241719- /O.EXP.KPSR.FF.W.0013.000000T0000Z-170724T1715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Maricopa AZ-Pinal AZ- 1012 AM MST MON JUL 24 2017 ...THE FLASH FLOOD WARNING FOR MARICOPA AND PINAL COUNTIES WILL EXPIRE AT 1015 AM MST... Heavy rainfall coverage has diminished in coverage but storm runoff and rainfall impacts linger. This larger warning will be allowed to expire, but is replaced by a new warning focused for Apache Junction and locations south to Queen Creek/San Tan Valley. Additional shower and thunderstorm activity may develop into the afternoon and exacerbate flooding conditions and storm runoff. Travel with caution and care throughout the region today and find another way around flooded roadways. Do not attempt to cross them. Turn Around, Don't Drown. LAT...LON 3387 11143 3326 11124 3323 11172 3381 11196 $$ Nolte
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 5:41 PM MST | Special Weather Statement | PSR | Pinal | 34 min |
| Jul 23, 5:53 PM MST | Areal Flood Advisory | PSR | Pinal | 3 hr |
| Jul 23, 6:14 PM MST | Special Weather Statement | PSR | Pinal | 31 min |
| Jul 23, 6:48 PM MST | Special Weather Statement | PSR | 27 min | |
| Jul 23, 6:51 PM MST | Special Weather Statement | PSR | Maricopa | 24 min |
| Jul 23, 7:09 PM MST | Areal Flood Advisory | PSR | Pinal | 2 hr |
| Jul 23, 7:10 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Jul 23, 7:17 PM MST | Special Weather Statement | PSR | Maricopa | 28 min |
| Jul 23, 7:29 PM MST | Areal Flood Advisory | PSR | Pinal | 3 hr |
| Jul 23, 7:44 PM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Jul 24, 5:54 AM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Jul 24, 8:08 AM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 4 hr |
| Jul 24, 8:13 AM MST | Areal Flood Advisory | PSR | Maricopa | 3 hr |
| Jul 24, 8:59 AM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Jul 24, 10:08 AM MST | Flash Flood Warning | PSR | Maricopa, Pinal | 3 hr |
| Jul 24, 11:10 AM MST | Areal Flood Advisory | PSR | La Paz, Maricopa, Yuma | 3 hr |
| Jul 24, 11:26 AM MST | Areal Flood Advisory | PSR | La Paz | 3 hr |
| Jul 24, 11:52 AM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Jul 24, 12:00 PM MST | Flash Flood Warning | PSR | La Paz | 3 hr |
| Jul 24, 12:22 PM MST | Flash Flood Warning | PSR | La Paz, Maricopa | 6 hr |
| Jul 24, 2:39 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2017Every flash flood warning in 2017
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.