Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 74, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Sep 8, 2012, 3:56 PM MST for Pima County, Arizona. It was in force for 2 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 8, 2012, 3:56 PM MST (22:56 UTC)
- Expired
- Sep 8, 2012, 6:00 PM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Tucson radar (KEMX), 136 km from the middle of the area, began a volume at 22:58 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 (KTUS), launched 12:00Z, 10.9 hours before the alert went out and 117 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
- 1618 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 990 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
455 WGUS55 KTWC 082256 FFWTWC AZC019-090100- /O.NEW.KTWC.FF.W.0074.120908T2256Z-120909T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 356 PM MST SAT SEP 8 2012 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... * UNTIL 600 PM MST * AT 351 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STATIONARY THUNDERSTORM PRODUCING HEAVY RAIN SOUTH OF COWLIC. DOPPLER RADAR ESTIMATES THAT ONE TO TWO INCHES OF RAIN HAS FALLEN IN THE AREA SOUTH OF COWLIC AND EAST OF PAPAGO FARMS IN THE PAST HOUR. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PAPAGO FARMS...COWLIC AND BIG FIELDS PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 3194 11204 3171 11186 3161 11194 3176 11243 $$
2 follow-up statements
838 WGUS75 KTWC 082345 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 445 PM MST SAT SEP 8 2012 AZC019-090100- /O.CON.KTWC.FF.W.0074.000000T0000Z-120909T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 445 PM MST SAT SEP 8 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM MST FOR SOUTH CENTRAL PIMA COUNTY... AT 437 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT HEAVY RAIN HAS ENDED BUT FLASH FLOODING IS LIKELY STILL OCCURRING IN THE WARNED AREA. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PAPAGO FARMS...COWLIC AND BIG FIELDS LAT...LON 3194 11204 3171 11186 3161 11194 3176 11243 $$
765 WGUS75 KTWC 090058 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 558 PM MST SAT SEP 8 2012 AZC019-090107- /O.EXP.KTWC.FF.W.0074.000000T0000Z-120909T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIMA AZ- 558 PM MST SAT SEP 8 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM MST FOR SOUTH CENTRAL PIMA COUNTY... HEAVY RAIN HAS ENDED ACROSS THE WARNED AREA WITH WATER STILL FLOWING IN THE STREAMS AND WASHES. LAT...LON 3194 11204 3171 11186 3161 11194 3176 11243 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 5:24 PM MST | Areal Flood Advisory | TWC | Graham | 81 min |
| Sep 8, 1:19 PM MST | Severe Thunderstorm Warning | TWC | Pima | 26 min |
| Sep 8, 1:41 PM MST | Flash Flood Warning | TWC | Pima | 3 hr |
| Sep 8, 2:27 PM MST | Special Weather Statement | TWC | Pima | 33 min |
| Sep 8, 2:33 PM MST | Severe Thunderstorm Warning | TWC | Pima | 27 min |
| Sep 8, 3:14 PM MST | Areal Flood Advisory | TWC | Pima | 3 hr |
| Sep 8, 4:42 PM MST | Areal Flood Warning | TWC | Pima | 12 hr |
Nearby
Flash Flood Warnings in Arizona, 2012Every flash flood warning in 2012
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.