Alert archive / Arizona / Flash Flood Warnings in 2017
Flash Flood Warning 9, NWS Phoenix, AZ
NWS Phoenix, AZ issued this flash flood warning at Jul 18, 2017, 8:02 PM MST for La Paz County, Maricopa County, Arizona. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2017, 8:02 PM MST (03:02 UTC)
- Expired
- Jul 18, 2017, 11:00 PM MST
- In force
- 3 hr
- Issued by
- NWS Phoenix, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties La Paz County, AZ, Maricopa County, AZ
The radar
The Phoenix radar (KIWA), 159 km from the middle of the area, began a volume at 03:03 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
Phoenix, AZ (KPSR), launched 00:00Z, 3.0 hours before the alert went out and 128 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
- 1393 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1792 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
223
WGUS55 KPSR 190302
FFWPSR
AZC012-013-190600-
/O.NEW.KPSR.FF.W.0009.170719T0302Z-170719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
802 PM MST TUE JUL 18 2017
The National Weather Service in Phoenix has issued a
* Flash Flood Warning for...
Eastern La Paz County in west central Arizona...
Maricopa County in south central Arizona...
* Until 1100 PM MST
* At 801 PM MST, Doppler radar indicated heavy rain across the warned
area. Up to two inches of rain have already fallen. Flash flooding
is already occurring.
* Some locations that will experience flooding include...
Aguila, Wenden, Gladden and Salome. US Highway 60 may be subject
to flooding.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3384 11299 3374 11314 3374 11348 3380 11361
3395 11347 3401 11329 3400 11300
$$
KW2 follow-up statements
742
WGUS75 KPSR 190331
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
831 PM MST TUE JUL 18 2017
AZC012-013-190600-
/O.CON.KPSR.FF.W.0009.000000T0000Z-170719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-Maricopa AZ-
831 PM MST TUE JUL 18 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM MST FOR
EAST CENTRAL LA PAZ AND MARICOPA COUNTIES...
At 829 PM MST, Doppler radar indicated heavy rain across the warned
area. Up to two inches of rain have already fallen. Flash flooding is
already occurring.
Some locations that will experience flooding include...
Wenden, Gladden and Aguila.
Radar continues to indicate very heavy rain falling, especially
between Wenden and Gladden with some rainfall rates of 2 to 2.5
inches per hour along US Highway 60.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3388 11309 3380 11322 3378 11345 3382 11357
3395 11347 3399 11332 3400 11311
$$
Waters937
WGUS75 KPSR 190553
FFSPSR
Flash Flood Statement
National Weather Service Phoenix AZ
1053 PM MST TUE JUL 18 2017
AZC012-013-190603-
/O.EXP.KPSR.FF.W.0009.000000T0000Z-170719T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
La Paz AZ-Maricopa AZ-
1053 PM MST TUE JUL 18 2017
...THE FLASH FLOOD WARNING FOR EAST CENTRAL LA PAZ AND MARICOPA
COUNTIES WILL EXPIRE AT 1100 PM MST...
The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 3388 11309 3380 11322 3378 11345 3382 11357
3395 11347 3399 11332 3400 11311
$$
THWThe office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 5:43 PM MST | Flash Flood Warning | PSR | Maricopa | 6 hr |
| Jul 18, 6:01 PM MST | Special Weather Statement | PSR | Maricopa | 44 min |
| Jul 18, 6:06 PM MST | Severe Thunderstorm Warning | PSR | Maricopa | 24 min |
| Jul 18, 6:11 PM MST | Special Weather Statement | PSR | 49 min | |
| Jul 18, 6:15 PM MST | Special Weather Statement | PSR | 45 min | |
| Jul 18, 6:26 PM MST | Blowing Dust Advisory | PSR | Pinal | 3 hr |
| Jul 18, 6:40 PM MST | Flash Flood Warning | PSR | Maricopa | 3 hr |
| Jul 18, 7:26 PM MST | Special Weather Statement | PSR | 49 min | |
| Jul 18, 10:22 PM MST | Areal Flood Advisory | PSR | Maricopa, Pinal | 3 hr |
| Jul 19, 12:42 PM MST | Areal Flood Advisory | PSR | Gila, Pinal | 2 hr |
| Jul 19, 1:10 PM MST | Special Weather Statement | PSR | Maricopa | 50 min |
| Jul 19, 2:32 PM MST | Special Weather Statement | PSR | Gila | 28 min |
| Jul 19, 2:34 PM MST | Special Weather Statement | PSR | Maricopa | 26 min |
| Jul 19, 4:10 PM MST | Special Weather Statement | PSR | 35 min | |
| Jul 19, 4:57 PM MST | Special Weather Statement | PSR | Pinal | 48 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.