Alert archive / Arizona / Flash Flood Warnings in 2017
Flash Flood Warning 3, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 16, 2017, 10:29 PM MST for Maricopa County, Pinal County, Arizona. 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 16, 2017, 10:29 PM MST (05:29 UTC)
- Expired
- Jul 17, 2017, 1:39 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), 46 km from the middle of the area, began a volume at 05:27 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 16, 10:37 PM MST | FLASH FLOOD | 1 Nne Phoenix, AZ | I-10 AT 7TH ST. EXIT, N.-CENTRAL DOWNTOWN. |
| Jul 16, 10:46 PM MST | HEAVY RAIN 0.71 | 2 Nnw Phoenix, AZ | MEASURED IN 21 MINUTES. |
| Jul 16, 10:46 PM MST | HEAVY RAIN 0.85 | 2 N Phoenix, AZ | N-CENTRAL PHOENIX. |
| Jul 17, 12:00 AM MST | FLASH FLOOD | 1 Nne Luke Afb, AZ | DELAYED REPORT: STORM SPOTTER REPORTED OLIVE AND LITCHFIELD ROADS NEAR LUKE AFB WERE INUNDATED WITH WATER...CURB TO CURB INCLUDING THE LITCHFIELD/NORTHERN UNDERPASS. |
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 00:00Z, 5.5 hours before the alert went out and 15 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
- 629 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 2295 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
540 WGUS55 KPSR 170529 FFWPSR AZC013-021-170830- /O.NEW.KPSR.FF.W.0003.170717T0529Z-170717T0830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Phoenix AZ 1029 PM MST SUN JUL 16 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 130 AM MST * At 1026 PM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to one inch of rain has already fallen across portions of the Phoenix Metro Area, particularly near Scottsdale and Paradise Valley. Additional heavy rainfall is likely through midnight and flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Phoenix, Mesa, Glendale, Scottsdale, Tempe, Surprise, Avondale, Goodyear, Apache Junction, El Mirage, Fountain Hills, Paradise Valley, Tolleson, Youngtown and Waddell. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be especially cautious at night when it is harder to recognize the dangers of flooding. && LAT...LON 3365 11240 3362 11151 3337 11157 3340 11242 $$ Hirsch
3 follow-up statements
294 WGUS75 KPSR 170630 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 1130 PM MST SUN JUL 16 2017 AZC021-170639- /O.CAN.KPSR.FF.W.0003.000000T0000Z-170717T0830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pinal AZ- 1130 PM MST SUN JUL 16 2017 ...THE FLASH FLOOD WARNING FOR PINAL COUNTY IS CANCELLED... Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3363 11180 3338 11181 3340 11242 3365 11240 $$ AZC013-170830- /O.CON.KPSR.FF.W.0003.000000T0000Z-170717T0830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Maricopa AZ- 1130 PM MST SUN JUL 16 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM MST FOR MARICOPA COUNTY... At 1129 PM MST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Over one inch of rain has already fallen. An additional half of an inch of rain is possible across the West Valley, which will produce areas of flash flooding. Some locations that will experience flooding include... Phoenix, Mesa, Glendale, Scottsdale, Tempe, Surprise, Avondale, Goodyear, El Mirage, Paradise Valley, Tolleson, Youngtown, Waddell, Laveen and Cashion. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3363 11180 3338 11181 3340 11242 3365 11240 $$ Hirsch
270 WGUS55 KPSR 170800 FFWPSR AZC013-171130- /O.EXT.KPSR.FF.W.0003.000000T0000Z-170717T1130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Phoenix AZ 100 AM MST MON JUL 17 2017 The National Weather Service in Phoenix has extended the * Flash Flood Warning for... Maricopa County in south central Arizona... parts of the greater Phoenix area... * Until 430 AM MST * At 1255 AM MST, isolated thunderstorms and general light rain continued in the greater Phoenix area. The Flash Flood Warning issued earlier for parts of greater Phoenix area will continue through 130 am. Some desert washes continued to run at 1245 am, as well as numerous flooded roadways. * Some locations that will experience flooding include... Phoenix, Mesa, Glendale, Scottsdale, Tempe, Surprise, Avondale, Goodyear, El Mirage, Paradise Valley, Tolleson, Youngtown, Waddell, Laveen and Cashion. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be especially cautious at night when it is harder to recognize the dangers of flooding. Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots. && LAT...LON 3363 11180 3338 11181 3340 11242 3365 11240 $$ HV
004 WGUS75 KPSR 170839 FFSPSR Flash Flood Statement National Weather Service Phoenix AZ 139 AM MST MON JUL 17 2017 AZC013-170848- /O.CAN.KPSR.FF.W.0003.000000T0000Z-170717T1130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Maricopa AZ- 139 AM MST MON JUL 17 2017 ...THE FLASH FLOOD WARNING FOR MARICOPA COUNTY IS CANCELLED... The heavy rain has ended. Flood waters were starting to recede. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3363 11180 3338 11181 3340 11242 3365 11240 $$ HV
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 5:19 PM MST | Special Weather Statement | PSR | Pinal | 56 min |
| Jul 16, 5:48 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 57 min |
| Jul 16, 6:16 PM MST | Blowing Dust Advisory | PSR | Maricopa, Pinal | 104 min |
| Jul 16, 6:36 PM MST | Special Weather Statement | PSR | 39 min | |
| Jul 16, 6:46 PM MST | Special Weather Statement | PSR | Pinal | 59 min |
| Jul 16, 7:48 PM MST | Special Weather Statement | PSR | Pinal | 57 min |
| Jul 16, 7:52 PM MST | Severe Thunderstorm Warning | PSR | Pinal | 38 min |
| Jul 16, 8:12 PM MST | Special Weather Statement | PSR | Pinal | 48 min |
| Jul 16, 9:12 PM MST | Severe Thunderstorm Warning | PSR | Gila, Maricopa | 33 min |
| Jul 16, 9:35 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 25 min |
| Jul 16, 10:06 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 24 min |
| Jul 16, 10:08 PM MST | Special Weather Statement | PSR | Maricopa | 52 min |
| Jul 16, 10:20 PM MST | Severe Thunderstorm Warning | PSR | Maricopa, Pinal | 25 min |
| Jul 16, 10:33 PM MST | Special Weather Statement | PSR | Maricopa | 72 min |
| Jul 16, 10:46 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 29 min |
| Jul 16, 10:53 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 88 min |
| Jul 16, 11:08 PM MST | Special Weather Statement | PSR | Maricopa | 82 min |
| Jul 16, 11:25 PM MST | Flash Flood Warning | PSR | Gila | 3 hr |
| Jul 16, 11:51 PM MST | Areal Flood Advisory | 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.