Alert archive / Arizona / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 6, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at May 19, 1997, 2:46 PM MST for Pinal County, Arizona. It was in force for 64 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
- May 19, 1997, 2:46 PM MST (21:46 UTC)
- Expired
- May 19, 1997, 3:50 PM MST
- In force
- 64 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pinal County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 9.8 hours before the alert went out and 92 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
- 295 J/kg
- Mixed-layer CIN
- -196 J/kg
- Mixed-layer LCL
- 2139 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 19, 2:05 PM MST, 41 minutes earlier.
Area forecast discussion, May 19, 2:05 PM MST, 41 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 200 PM MST MON MAY 19 1997 TSTMS DEVELOPED OVER HIGHER MTS BY 11 AM WITH REPORTS OF .5 INCH HAIL. DUDLEYVILLE STORM SHOWED SOME ROTATION AND WEAK BWER IN CROSS SECTION...BUT NO VERIFICATION. BIG TIME DRYING GOING ON IN SRN PORTIONS OF CWA ...OLS DEW POINT DOWN TO 30...DUG DOWN TO 37. WILL LOWER POPS THERE. TUE...UPPER TROF REMAINS OFF THE W COAST/BAJA AREA WITH ANOTHER VORTICITY MAX MOVING TOWARDS SRN AZ. STILL NO DECREASE IN MOISTURE...SO ANOTHER ROUNDS OF AFTERNOON TSTM...MAINLY TUS EWD.NOT SEEING MUCH IN THE WAY OF HEIGHT FALLS...SO MAX TEMPS BASICALLY A FUNCTION OF CLOUD COVER. ETA INCREASING MOISTURE OVER ERN ZONES TUE NGT ON THIS NEVER ENDING SLY FLOW. WED...AVN SUGGESTING THE TROUGH AXIS WILL ACTUALLY START MOVING EWD ACROSS AZ. THUS WED MAY BE MORE ACTIVE DUE TO INCREASES MOISTURE AND FORCING FROM UPPER TROUGH. POSSIBLY EVEN BRIEF MODERATE TO HEAVY RAIN. WILL TRY TO SHOW SLGT UPWARD TREND IN POPS...THOUGH STILL IN SCATTERED CATEGORY. AVN SHOWING CONSIDERABLE COOLING WITH HEIGHTS/THICKNESS DOWN 30-60 METERS. TUS 0223 TUS...NONE
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 11:59 AM MST | Severe Thunderstorm Warning | TWC | Pinal | 46 min |
| May 19, 12:53 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 47 min |
| May 19, 1:36 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 29 min |
| May 19, 2:12 PM MST | Flash Flood Warning | TWC | Pinal | 93 min |
| May 19, 2:46 PM MST | Flash Flood Warning | TWC | Pinal | 64 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1997Every severe thunderstorm warning in 1997
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.