Alert archive / Arizona / Flash Flood Warnings in 2011
Flash Flood Warning 51, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 20, 2011, 12:00 PM MST for Cochise County, Arizona. It was in force for 90 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 20, 2011, 12:00 PM MST (19:00 UTC)
- Expired
- Aug 20, 2011, 1:30 PM MST
- In force
- 90 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
- Flood severity
- None
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 57 km from the middle of the area, began a volume at 19:01 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 20, 12:30 PM MST | FLASH FLOOD | 3 Se Ramsey Canyon Pres, AZ | FLASH FLOOD IN MILLER CANYON. TIME ESTIMATED BASED ON RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 7.0 hours before the alert went out and 96 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
- 233 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1510 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
567 WGUS55 KTWC 201900 FFWTWC AZC003-202030- /O.NEW.KTWC.FF.W.0051.110820T1900Z-110820T2030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 1200 PM MST SAT AUG 20 2011 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN COCHISE COUNTY IN SOUTHEAST ARIZONA... * UNTIL 130 PM MST * AT 1152 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH HEAVY RAINFALL OVER THE MONUMENT BURN AREA. THE HEAVIEST RAINFALL WAS NEAR RAMSEY CANYON. A RAIN GAUGE AT ASH CANYON REPORTED .67 OF AN INCH WITH ONE AT CARR CANYON REPORTING .55 OF INCH IN A SHORT PERIOD OF TIME. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY CANYON PRESERVE...CARR CANYON...AND ASH CANYON. 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. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. && LAT...LON 3148 11041 3153 11034 3140 11020 3135 11031 $$
2 follow-up statements
130 WGUS75 KTWC 201925 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 1225 PM MST SAT AUG 20 2011 AZC003-202030- /O.CON.KTWC.FF.W.0051.000000T0000Z-110820T2030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COCHISE AZ- 1225 PM MST SAT AUG 20 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM MST FOR SOUTHWESTERN COCHISE COUNTY...FOR THE MONUMENT BURN AREA... AT 1215 PM MST...RADAR INDICATED MODERATE RAINFALL ACROSS THE MONUMENT FIRE BURN AREA. AN AUTOMATED RAIN GAUGE AT MILLER/CARR CANYON REPORTED .83 OF INCH IN THE PAST HOUR. THIS AMOUNT OF RAINFALL WILL LIKELY RESULT IN FLASH FLOODING. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY CANYON PRESERVE AND MILLER/CARR CANYON...WITH ELEVATED FLOWS IN ASH CANYON WHERE RAINFALL HAD ALREADY ENDED. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 3148 11041 3153 11034 3140 11020 3135 11031 $$
067 WGUS75 KTWC 202028 FFSTWC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 128 PM MST SAT AUG 20 2011 AZC003-202037- /O.EXP.KTWC.FF.W.0051.000000T0000Z-110820T2030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ COCHISE AZ- 128 PM MST SAT AUG 20 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 130 PM MST FOR SOUTHWESTERN COCHISE COUNTY... RAIN HAD ENDED ACROSS THE BURN AREA. THUS...THE WARNING WILL EXPIRE AT 130 PM MST. LAT...LON 3148 11041 3153 11034 3140 11020 3135 11031 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 5:18 PM MST | Special Weather Statement | TWC | Santa Cruz | 27 min |
| Aug 19, 5:57 PM MST | Special Weather Statement | TWC | Santa Cruz | 33 min |
| Aug 19, 6:26 PM MST | Areal Flood Advisory | TWC | Pima | 94 min |
| Aug 19, 7:58 PM MST | Special Weather Statement | TWC | Cochise | 32 min |
| Aug 20, 2:59 PM MST | Flash Flood Warning | TWC | Santa Cruz | 2 hr |
| Aug 20, 3:30 PM MST | Special Weather Statement | TWC | Santa Cruz | 30 min |
Nearby
Flash Flood Warnings in Arizona, 2011Every flash flood warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.