Alert archive / Arizona / Flash Flood Warnings in 2018
Flash Flood Warning 13, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 2, 2018, 5:29 PM MST for Pima 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
- Aug 2, 2018, 5:29 PM MST (00:29 UTC)
- Expired
- Aug 2, 2018, 8:30 PM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Phoenix radar (KIWA), 129 km from the middle of the area, began a volume at 00:29 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
Tuscon, AZ (KDMA), launched 00:00Z, 0.5 hours before the alert went out and 120 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
- 394 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 3157 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
231 WGUS55 KTWC 030029 FFWTWC AZC019-030330- /O.NEW.KTWC.FF.W.0013.180803T0029Z-180803T0330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Tucson AZ 529 PM MST THU AUG 2 2018 The National Weather Service in Tucson has issued a * Flash Flood Warning for... North central Pima County in southeastern Arizona... * Until 830 PM MST. * At 528 PM MST, Doppler radar indicated thunderstorms producing heavy rain along and near Highway 86 northwest of Sells. Up to two inches of rain have already fallen. Flash flooding is expected to begin shortly. * Some locations that will experience flooding include... Covered Wells and Mountain Village. This includes the following streams and drainages...San Simon Wash... Quijotoa Wash...Santa Rosa Wash...Gu Achi Wash and Sikul Himatk Wash. This includes Route 86 between mile markers 79 and 93. LAT...LON 3225 11205 3213 11211 3213 11235 3229 11233 $$ Meyer
2 follow-up statements
692 WGUS75 KTWC 030159 FFSTWC Flash Flood Statement National Weather Service Tucson AZ 659 PM MST THU AUG 2 2018 AZC019-030330- /O.CON.KTWC.FF.W.0013.000000T0000Z-180803T0330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pima- 659 PM MST THU AUG 2 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM MST FOR NORTH CENTRAL PIMA COUNTY... At 657 PM MST, Doppler radar indicated light to moderate showers continuing along and near Highway 86 northwest of Sells. Rainfall amounts in excess of 2 inches have fallen over the area, with flash flooding likely. Some locations that will experience flooding include... Covered Wells and Mountain Village. This includes the following streams and drainages...San Simon Wash... Quijotoa Wash...Santa Rosa Wash...Gu Achi Wash and Sikul Himatk Wash. This includes Route 86 between mile markers 79 and 93. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be especially cautious at night when it is harder to recognize the dangers of flooding. && LAT...LON 3225 11205 3213 11211 3213 11235 3229 11233 $$ Meyer
466 WGUS75 KTWC 030322 FFSTWC Flash Flood Statement National Weather Service Tucson AZ 822 PM MST THU AUG 2 2018 AZC019-030330- /O.EXP.KTWC.FF.W.0013.000000T0000Z-180803T0330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pima- 822 PM MST THU AUG 2 2018 ...THE FLASH FLOOD WARNING FOR NORTH CENTRAL PIMA COUNTY WILL EXPIRE AT 830 PM MST... Little additional rainfall is expected tonight. Flash Flooding is no longer expected to pose a threat, however there will be heavy flow in normally dry washes and streambeds overnight. Please continue to heed any remaining road closures. LAT...LON 3225 11205 3213 11211 3213 11235 3229 11233 $$ Meyer
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:01 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Aug 2, 5:13 PM MST | Special Weather Statement | TWC | Pima | 32 min |
| Aug 2, 5:19 PM MST | Dust Storm Advisory | TWC | Pima, Pinal | 26 min |
| Aug 2, 5:37 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 68 min |
| Aug 2, 6:37 PM MST | Special Weather Statement | TWC | Pinal | 38 min |
| Aug 3, 2:18 PM MST | Special Weather Statement | TWC | Cochise | 42 min |
| Aug 3, 2:45 PM MST | Areal Flood Advisory | TWC | Graham | 60 min |
| Aug 3, 3:03 PM MST | Special Weather Statement | TWC | Cochise | 42 min |
| Aug 3, 3:07 PM MST | Flash Flood Warning | TWC | Graham | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2018Every flash flood warning in 2018
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.