Alert archive / Arizona / Flash Flood Warnings in 2015
Flash Flood Warning 49, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Sep 21, 2015, 3:35 PM MST for Pima County, Pinal County, Arizona. It was in force for 4 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
- Sep 21, 2015, 3:35 PM MST (22:35 UTC)
- Expired
- Sep 21, 2015, 7:30 PM MST
- In force
- 4 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
Counties Pima County, AZ, Pinal County, AZ
The radar
The Tucson radar (KEMX), 64 km from the middle of the area, began a volume at 22:35 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 12:00Z, 10.6 hours before the alert went out and 41 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
690 WGUS55 KTWC 212235 FFWTWC AZC019-021-220230- /O.NEW.KTWC.FF.W.0049.150921T2235Z-150922T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 335 PM MST MON SEP 21 2015 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN PINAL COUNTY IN SOUTHEASTERN ARIZONA... NORTHEASTERN PIMA COUNTY IN SOUTHEASTERN ARIZONA... * UNTIL 730 PM MST * AT 326 PM MST...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED BETWEEN 2.50 AND 3.50 INCHES WITH ISOLATED AMOUNTS UP TO 4 INCHES OF RAIN HAD FALLEN ON THE SANTA CATALINA MOUNTAINS. AN AUTOMATED RAINFALL GAGE IN DAN SADDLE RECORDED 4.13 INCHES OF RAIN. ALTHOUGH THIS RAINFALL HAS OCCURRED OVER SEVERAL HOURS...THIS WIDESPREAD AND SIGNIFICANT RAINFALL WILL RESULT IN FLASH FLOODING. THE HEAVIEST RAINFALL HAS BEEN IN THE CANADA DEL ORO WATERSHED. THIS RUNOFF TAKES SEVERAL HOURS TO MAKE IT DOWN THE MOUNTAIN. ADDITIONAL WATERSHEDS THAT MAY EXPERIENCE FLASH FLOODING INCLUDE SABINO CREEK AND BEAR CANYON ON THE SOUTHERN SIDE OF THE CATALINA...AND THE SAN PEDRO RIVER ON THE NORTHEAST SIDE OF THE CATALINA MOUNTAINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3240 11046 3236 11094 3259 11087 3259 11046 $$
1 follow-up statement
935 WGUS75 KTWC 220225 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 725 PM MST MON SEP 21 2015 AZC019-021-220232- /O.EXP.KTWC.FF.W.0049.000000T0000Z-150922T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PINAL AZ-PIMA AZ- 725 PM MST MON SEP 21 2015 ...THE FLASH FLOOD WARNING FOR SOUTHEASTERN PINAL AND NORTHEASTERN PIMA COUNTIES WILL EXPIRE AT 730 PM MST... THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. HOWEVER...ADDITIONAL LIGHT TO MODERATE RAIN WILL CONTINUE THROUGH THE EVENING. IN ADDITION...WASHES WILL CONTINUE TO FLOW OVER NORTHEAST PIMA AND SOUTHEAST PINAL COUNTY DURING THE REMAINDER OF THE EVENING AND INTO THE OVERNIGHT HOURS. LAT...LON 3240 11046 3236 11094 3259 11087 3259 11046 $$ MOLLERE
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 8:39 AM MST | Areal Flood Advisory | TWC | Santa Cruz | 3 hr |
| Sep 21, 9:36 AM MST | Areal Flood Advisory | TWC | Cochise | 114 min |
| Sep 21, 10:08 AM MST | Flash Flood Warning | TWC | Santa Cruz | 3 hr |
| Sep 21, 11:19 AM MST | Areal Flood Advisory | TWC | Pima | 116 min |
| Sep 21, 12:10 PM MST | Flash Flood Warning | TWC | Pima, Santa Cruz | 3 hr |
| Sep 21, 12:33 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 4 hr |
| Sep 21, 1:27 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Sep 21, 1:35 PM MST | Areal Flood Advisory | TWC | Graham | 3 hr |
| Sep 21, 1:38 PM MST | Areal Flood Advisory | TWC | Pima | 112 min |
| Sep 21, 3:28 PM MST | Flash Flood Warning | TWC | Graham | 3 hr |
Nearby
Flash Flood Warnings in Arizona, 2015Every flash flood warning in 2015
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.