Alert archive / Arizona / Flash Flood Warnings in 2012
Flash Flood Warning 45, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 21, 2012, 7:51 PM MST for Pima County, Arizona. It was in force for 114 min. 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 21, 2012, 7:51 PM MST (02:51 UTC)
- Expired
- Aug 21, 2012, 9:45 PM MST
- In force
- 114 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Pima County, AZ
The radar
The Phoenix radar (KIWA), 114 km from the middle of the area, began a volume at 02:52 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, 2.9 hours before the alert went out and 126 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
- 565 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2143 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
810
WGUS55 KTWC 220251
FFWTWC
AZC019-220445-
/O.NEW.KTWC.FF.W.0045.120822T0251Z-120822T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
751 PM MST TUE AUG 21 2012
THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...
* UNTIL 945 PM MST
* AT 742 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED
TO SHOW A LARGE AREA OF STRONG THUNDERSTORMS GENERATING WIDESPREAD
RAINFALL IN EXCESS OF OF 2 INCHES WITH SOME LOCATIONS OVER 3 INCHES
ACROSS MAINLY CENTRAL AND NORTHERN PORTIONS OF THE TOHONO O'ODHAM
NATION.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SANTA
ROSA...SIL NAGGIA...QUEENS WELL...AK CHIN...COVERED WELLS...AND
PISINIMO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND OTHER DRAINAGE
AREAS AND LOW LYING SPOTS.
&&
LAT...LON 3249 11169 3229 11147 3195 11216 3204 11239
3250 11234
$$
MEYER2 follow-up statements
572
WGUS75 KTWC 220344
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
844 PM MST TUE AUG 21 2012
AZC019-220445-
/O.CON.KTWC.FF.W.0045.000000T0000Z-120822T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
844 PM MST TUE AUG 21 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST FOR
CENTRAL PIMA COUNTY...
AT 836 PM MST...SHOWERS AND THUNDERSTORMS WERE FINALLY WEAKENING
ACROSS MOST OF CENTRAL AND NORTHERN PORTIONS OF THE TOHONO O'ODHAM
NATION. HEAVY RUNOFF FROM EXTREMELY HEAVY RAINFALL AMOUNTS OVER THE
PAST FEW HOURS...WITH SOME LOCATIONS IN EXCESS OF 3 TO 4
INCHES...WILL CONTINUE TO GENERATE FLOODING CONDITIONS OVERNIGHT.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SANTA
ROSA...SIL NAGGIA...QUEENS WELL...AK CHIN...COVERED WELLS...AND
PISINIMO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND OTHER DRAINAGE
AREAS AND LOW LYING SPOTS.
&&
LAT...LON 3249 11169 3229 11147 3195 11216 3204 11239
3250 11234
$$
MEYER470
WGUS75 KTWC 220449
FFSTWC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
949 PM MST TUE AUG 21 2012
AZC019-220458-
/O.EXP.KTWC.FF.W.0045.000000T0000Z-120822T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
949 PM MST TUE AUG 21 2012
...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL PIMA COUNTY...
AT 945 PM MST ONLY LIGHT SHOWERS REMAINED ACROSS PIMA COUNTY AND THE
TOHONO O'ODHAM NATION. EXTREMELY HEAVY RAINFALL EARLIER IN THE
EVENING WILL CAUSE HEAVY RUNOFF TO CONTINUE INTO THE EARLY MORNING
HOURS. AN URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT
UNTIL 115 AM MST.
LAT...LON 3249 11169 3229 11147 3195 11216 3204 11239
3250 11234
$$
MEYERThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 5:03 PM MST | Special Weather Statement | TWC | Pinal | 57 min |
| Aug 21, 5:21 PM MST | Special Weather Statement | TWC | Pinal | 39 min |
| Aug 21, 5:37 PM MST | Flash Flood Warning | TWC | Pinal | 83 min |
| Aug 21, 5:39 PM MST | Flash Flood Warning | TWC | Pima | 85 min |
| Aug 21, 5:45 PM MST | Flash Flood Warning | TWC | Pima | 2 hr |
| Aug 21, 5:48 PM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Aug 21, 5:53 PM MST | Special Weather Statement | TWC | Pinal | 52 min |
| Aug 21, 6:38 PM MST | Flash Flood Warning | TWC | Pima | 112 min |
| Aug 21, 6:47 PM MST | Severe Thunderstorm Warning | TWC | Pima | 43 min |
| Aug 21, 6:55 PM MST | Severe Thunderstorm Warning | TWC | Pima | 50 min |
| Aug 21, 7:13 PM MST | Areal Flood Advisory | TWC | Pima | 6 hr |
| Aug 21, 8:31 PM MST | Special Weather Statement | TWC | 44 min | |
| Aug 21, 10:29 PM MST | Areal Flood Warning | TWC | Pima | 3 hr |
| Aug 22, 2:12 AM MST | Areal Flood Warning | TWC | Pima | 12 hr |
| Aug 22, 3:08 AM MST | Flash Flood Watch | TWC | Cochise, Pima, Pinal, Santa Cruz | 17 hr |
| Aug 22, 9:35 AM MST | Areal Flood Advisory | TWC | Cochise, Graham, Pima, Pinal, Santa Cruz | 3 hr |
| Aug 22, 2:28 PM MST | Areal Flood Warning | TWC | Pima, Pinal | 7 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.