Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 1, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 5, 1999, 12:38 PM MST for Pima County, Arizona. It was in force for 92 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 5, 1999, 12:38 PM MST (19:38 UTC)
- Expired
- Jul 5, 1999, 2:10 PM MST
- In force
- 92 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 19:37 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, 7.6 hours before the alert went out and 84 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
- 26 J/kg
- Mixed-layer CIN
- -296 J/kg
- Mixed-layer LCL
- 2467 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- -9 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 051936 FFWTUS AZC019-052110- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 1238 PM MST MON JUL 5 1999 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN PIMA COUNTY IN SOUTHERN ARIZONA INCLUDING SUMMERHAVEN AND CATALINA STATE PARK. * UNTIL 210 PM MST * AT 1230 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN NEAR AND NORTH OF SUMMERHAVEN...MOVING SLOWLY NORTHWEST. * EXPECT RAINFALL AMOUNTS NEAR 2 INCHES IN SOME LOCATIONS AROUND CATALINA STATE PARK. FLOODING OF STREAMBEDS AND WASHES CAN BE EXPECTED...AVOID NARROW CANYON AREAS. THIS FLASH FLOOD WARNVING DOES NOT INCLUDE METROPOLITAN TUCSON. WJM
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 5, 9:30 AM MST, 3 hours 8 minutes earlier.
Area forecast discussion, Jul 5, 9:30 AM MST, 3 hours 8 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 930 AM MST MON JUL 5 1999 SYNOPSIS...HIGH PRESSURE ALOFT WILL MOVE TO THE FOUR CORNERS AREA TONIGHT. THIS PATTERN WILL REMAIN THROUGH THE WEEK...AND WILL CONTINUE TO BRING MOISTURE INTO SOUTHEAST ARIZONA. EXPECT SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS...BUT A FEW STORMS SHOULD LINGER INTO THE OVERNIGHT HOURS THE NEXT FEW DAYS. DISCUSSION...12Z TUCSON SOUNDING LOOKING BETTER TODAY...ENOUGH OF A VERTICAL PROFILE FOR A LITTLE BETTER ORGANIZATION. SOUTHEASTERLY TO EASTERLY FLOW INCREASING AS LARGE SCALE PATTERN SETS UP WITH A HIGH NEAR THE 4 CORNERS. WEAK INVERTED TROUGH / MID LEVEL DISTURBANCE IN THE DEVELOPING EASTERLIES COULD ENHANCE THINGS THIS AFTERNOON. PLENTY OF MOISTURE WITH PW VALUES ABOVE 1.3. NICE 700MB THETA-E PATTERN SETTING UP OVER THE AREA FOR AT LEAST THE NEXT 36 HRS. DEBRIS CLOUD SCATTERING OUT NICELY SO WE SHOULD BE ABLE TO GET GOOD SURFACE HEATING. A TOUCH FURTHER WEST WE ARE FIGHTING A WEAK DRY SLOT WHERE FAR NORTHWEST MEXICO WAS A LITTLE LESS ACTIVE OVER THE PAST 36 HRS. ANYWAY...I LIKE THE CURRENT FORECAST WITH A BUSY MID TO LATE AFTERNOON / EVENING AND A TREND TO SPREAD THUNDERSTORMS SLOWLY WEST. MORE EFFICIENT PROCESSES WITH THUNDERSTORMS TODAY WILL HAVE US WATCHING OUTFLOWS MORE CLOSELY ALONG WITH RAINFALL AMOUNTS AND THE POTENTIAL OF SEVERE WINDS. NO UPDATES PLANNED. MEYER .TWC...NONE.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 12:38 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 32 min |
| Jul 5, 1:03 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 42 min |
| Jul 5, 2:43 PM MST | Severe Thunderstorm Warning | TWC | Greenlee | 47 min |
| Jul 5, 2:50 PM MST | Severe Thunderstorm Warning | TWC | Pima | 65 min |
| Jul 5, 3:18 PM MST | Flash Flood Warning | TWC | Pima | 92 min |
| Jul 5, 3:39 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 61 min |
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; radar from the NEXRAD Level II archive.