Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 17, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 17, 1999, 12:44 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1999, 12:44 PM MST (19:44 UTC)
- Expired
- Jul 17, 1999, 1:45 PM MST
- In force
- 61 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
Counties Pima County, AZ, Santa Cruz County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 7.7 hours before the alert went out and 56 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
- 10 J/kg
- Mixed-layer CIN
- -153 J/kg
- Mixed-layer LCL
- 1940 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 171943 FFWTUS AZC019-023-172045- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 1244 PM MST SAT JUL 17 1999 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN PIMA COUNTY IN SOUTHERN ARIZONA NORTHWESTERN SANTA CRUZ COUNTY IN SOUTHERN ARIZONA INCLUDING ARIVACA ROAD BETWEEN ARIVACA AND ARIVACA JUNCTION * UNTIL 145 PM MST * AT 1236 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN 10 MILES WEST OF AMADO... MOVING SLOWLY WEST. DOPPLER RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN HAVE FALLEN FROM THESE STORMS WITHIN THE PAST HOUR. HEAVY RAINFALL FROM THESE STORMS WILL QUICKLY FILL WASHES... LOW LYING AREAS AND DIPS ACROSS ROADWAYS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. RASMUSSEN
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before this flash flood warning went out at Jul 17, 9:35 AM MST, 3 hours 9 minutes earlier.
Area forecast discussion, Jul 17, 9:35 AM MST, 3 hours 9 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 935 AM MST SAT JUL 17 1999 SYNOPSIS...SLIGHTLY DRIER AIR HAS SETTLED INTO THE AREA...ESPECIALLY WEST OF TUCSON. THIS WILL LEAD TO A DECREASE IN THUNDERSTORM COVERAGE THROUGH EARLY NEXT WEEK. THE HIGHEST THREAT WILL BE SOUTH AND EAST OF TUCSON WHERE LINGERING MOISTURE WILL STILL BE RATHER HIGH...BUT MANY OF THOSE STORMS WILL REMAIN CONFINED TO HIGHER TERRAIN. DISCUSSION...SATELLITE AND RADAR INDICATED CLOUDY SKIES WITH A FEW LINGERING SHOWERS ACROSS PORTIONS OF COCHISE AND GRAHAM COUNTIES THIS MORNING. OTHERWISE...PARTLY CLOUDY SKIES WERE NOTED ACROSS THE WESTERN ZONES. MAIN WEATHER FEATURE TO WATCH FOR TODAY INTO SUNDAY WILL BE AN EASTERLY WAVE LOCATED JUST SOUTH OF THE TEXAS BIG BEND AREA THIS MORNING. LATEST ETA MODEL LIFTS THIS WAVE NORTHWARD DURING THE NEXT 24 HOURS WITH THE BEST AREA OF UPWARD VERTICAL MOTION PROGGED TO EXTEND OVER NEW MEXICO INTO FAR SOUTHEAST ARIZONA. BASED ON THIS...WOULD EXPECT MOST OF THE THUNDERSTORM ACTIVITY ACROSS OUR EASTERN ZONES LATER TODAY INTO SUNDAY. HOWEVER...WILL NEED TO WATCH OUT FOR STORMS THIS AFTERNOON DEVELOPING ALONG THE WESTERN EDGE OF THE EXTENSIVE CLOUD BAND THAT COVERS MOST OF EASTERN ARIZONA TODAY. THIS AREA OF DIFFERENTIAL SURFACE HEATING WILL EXTEND ACROSS SOUTHEAST PINAL SOUTH INTO CENTRAL PIMA AND WESTERN SANTA CRUZ COUNTIES. FOR NOW...WILL UPDATE FORECAST TO REFLEX MORE CLOUDINESS ACROSS EASTERN ZONES AND KEEP THE THUNDERSTORM COVERAGE ABOUT THE SAME. ALTHOUGH...THE EASTERN ZONES WILL LIKELY NOT SEE A LOT OF THUNDERSTORM COVERAGE THIS AFTERNOON DUE TO THE EXTENSIVE CLOUD COVER AND THE PERSIST LOW LEVEL MOISTURE CONVERGENCE COUPLED WILL THE LARGER SCALE LIFT. WILL LIKELY NEED THUNDERSTORMS TO DEVELOP OVER SOUTHERN NEW MEXICO AND PROPAGATE WESTWARD THIS AFTERNOON WHICH WOULD CALL FOR AN INCREASE IN STORMS LATER THIS EVENING AND TONIGHT ACROSS COCHISE...GRAHAM AND GREENLEE COUNTIES. JD .TWC...NONE.
Nearby
Flash Flood Warnings in Arizona, 1999Every flash flood warning in 1999
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.