Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 3, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Feb 18, 1998, 8:30 PM MST for Pima County, Arizona. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 18, 1998, 8:30 PM MST (03:30 UTC)
- Expired
- Feb 19, 1998, 7:00 AM MST
- In force
- 11 hr
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 3.5 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
- 36 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 140 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 190328 FFWTUS AZC019-191400- BULLETIN - EAS ACTIVATION REQUESTED SMALL STREAM FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 830 PM MST WED FEB 18 1998 ...SMALL STREAM FLOOD WARNING FOR EASTERN PIMA COUNTY...INCLUDING THE GREATER TUCSON AREA EXTENDED UNTIL 7 AM THURSDAY MORNING... WATER LEVELS IN MOST OF THE WASHES IN EASTERN PIMA COUNTY PEAKED EARLIER TODAY BUT ARE STILL A THREAT TO MOTORISTS AND SHOULD BE AVOIDED UNTIL THURSDAY MORNING. SOME STREAM GAGE READINGS AS OF 8 PM: TANQUE VERDE WASH AT T.V. GUEST RANCH...... 1.8 FT TANQUE VERDE WASH AT SABINO BRIDGE......... 1.3 FT PANTANO WASH AT VAIL....................... 1.0 FT SABINO CREEK............................... 1.6 FT SANTA CRUZ RIVER AT CORTARO................ 2.3 FT DO NOT DRIVE AROUND BARRIERS TO GET THROUGH THESE WASHES. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! HOLBROOK
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 Feb 18, 2:30 PM MST, 6 hours earlier.
Area forecast discussion, Feb 18, 2:30 PM MST, 6 hours before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST WED FEB 18 1998 SYNOPSIS...THE WINTER STORM THAT BROUGHT SIGNIFICANT VALLEY RAINS AND MOUNTAIN SNOWS HAS PUSHED TO THE EAST. HIGH PRESSURE WILL BUILD ACROSS THE AREA TONIGHT AND THURSDAY AHEAD OF THE NEXT WEATHER SYSTEM. THE NEXT WEATHER SYSTEM WILL BRING ANOTHER ROUND OF VALLEY RAIN AND MOUNTAIN SNOW FRIDAY INTO EARLY SATURDAY. DISCUSSION...WRAP AROUND CLOUDINESS CONTINUING THIS AFTERNOON AS WINTER STORM HAS PUSHED EAST OF STATE. HEAVY FLOW CONTINUING IN WASHES IN THE TUCSON METRO AREA INTO THIS EVENING...THUS WILL KEEP SMALL STREAM FLOOD WARNING GOING TIL 8 PM. HIGH PRESSURE WILL BEGIN TO BUILD ACROSS THE AREA TONIGHT WITH CLOUDS ON THE DECREASE. STILL MAY SEE ISOLATED VALLEY RAIN AND MOUNTAIN SNOW SHOWERS EARLY THIS EVENING BEFORE CLOUDS CLEAR. LOTS OF LOW-LEVEL MOISTURE AROUND THAT UNDER CLEARING SKIES...PATCHY FOG DEVELOPMENT IS POSSIBLE. THURSDAY WILL BE A DRY WITH THE DAY STARTING OUT MOSTLY SUNNY WITH PARTLY CLOUDY SKIES DEVELOPING IN THE AFTERNOON. NEXT WEATHER SYSTEM LOOKS FAIRLY SIMILIAR TO THE ONE THAT JUST PAST WITH ANOTHER ROUND OF SIGNIFICANT VALLEY RAINS AND HEAVY MOUNTAIN SNOWS FOR FRIDAY AFTERNOON INTO SATURDAY. I LIKE THE ETA/AVN/NOGAPS MODEL SLOWER SOLUTION WITH THE NGM MODEL A LITTLE TO FAST. AVN/NOGAPS CLOSE OFF UPPER LOW SOMEWHERE IN CENTRAL ARIZONA FRIDAY AFTERNOON AND MOVE IT THROUGH SOUTHEAST ARIZONA SATURDAY MORNING. FORECAST AREA WILL SEE AN INCREASE IN CLOUDS THURSDAY NIGHT WITH RAIN STARTING OUT IN THE MORNING HOURS WESTERN ZONES AND SPREADING EAST AS THE DAY PROGRESSES. WILL GO LIKELY POPS FROM TUCSON WEST FRIDAY AND SCATTERED POPS EAST OF TUCSON. AVN/NOGAPS QPF FORECAST SHOWING BETWEEN 0.50-1.25 OF RAIN WITH OVER A FOOT OF NEW SNOW ABOVE 6000 FEET. WITH THE GROUND ALREADY SATURATED...ESPECIALLY FROM TUCSON WEST...FLASH FLOODING IS A THREAT WITH THIS SYSTEM. LOOKS LIKE ANOTHER WINTER STORM WATCH WILL BE HOISTED ON THURSDAY. MID-SHIFT WILL HAVE ANOTHER RUN TO LOOK AT AND DECIDE ABOVE LINE OF THINKING. TUS 0007. GLUECK TUS...SMALL STREAM FLOOD WARNING FOR EASTERN PIMA COUNTY TIL 03Z.
Nearby
Flash Flood Warnings in Arizona, 1998Every flash flood warning in 1998
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.