Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 38, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Aug 11, 2000, 5:08 PM MST for Yavapai County, Arizona. It was in force for 37 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
- Aug 11, 2000, 5:08 PM MST (00:08 UTC)
- Expired
- Aug 11, 2000, 5:45 PM MST
- In force
- 37 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Whole counties
County Yavapai County, AZ
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 0.1 hours before the alert went out and 98 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
- 25 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 2919 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 120008 SVRFLG AZC025-120045- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 508 PM MST FRI AUG 11 2000 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN YAVAPAI COUNTY IN ARIZONA * UNTIL 545 PM MST * AT 508 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER SOUTHEASTERN YAVAPAI COUNTY...OR ABOUT 29 MILES SOUTH OF CAMP VERDE...MOVING SOUTH AT 5 MPH. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN FLAGSTAFF. $$ LAT...LON 34t24 11181 3421 11203 3397 11201 3401 11174
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 Flagstaff, AZ wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 2:30 PM MST, 2 hours 38 minutes earlier.
Area forecast discussion, Aug 11, 2:30 PM MST, 2 hours 38 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 230 PM MST FRI AUG 11 2000 SYNOPSIS...THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS NORTHERN ARIZONA EACH DAY THROUGH TUESDAY WITH THE GREATEST ACTIVITY CONTINUING ALONG THE MOGOLLON...RIM WHITE MOUNTAINS AND LOCATIONS SOUTHWARD. THERE WILL BE FEWER THUNDERSTORMS ALONG THE UTAH BORDER AND IN THE NORTHWEST. HIGH PRESSURE WILL SLOWLY BUILD WESTWARD OVER THE WEEKEND...BRINGING AN INCREASE IN MOISTURE AND SHOWER ACTIVITY EACH DAY. DISCUSSION...THIS AFTERNOON A MID- TO UPPER-LEVEL RIDGE AXIS EXTENDED FROM SOUTHERN CALIFORNIA INTO THE MIDWEST. MORNING SOUNDING DATA SHOWED A SLIGHTLY MORE ORGANIZED VERTICAL WIND PROFILE. IN THE MID TO LOWER LEVELS A NORTHERLY COMPONENT WAS PRESENT WITH WESTERLY FLOW ABOVE THAT. THE MODELS SUPPORT THIS GENERAL SHEAR PROFILE CONTINUING FOR AT LEAST THE NEXT TWO DAYS. THIS IS FAVORABLE TO SOUTHWARD PROPAGATION OF STORMS OFF THE MOGOLLON RIM AND WILL WEIGHT FORECAST ACCORDINGLY. THE MODELS ARE PROMISING AN INCREASE IN MOISTURE OVER THE NEXT TWO DAYS AND WITH SUCH A MOIST AIR MASS TO THE SOUTH AND SOUTHEAST (ASSOCIATED WITH A WEAK MID-LEVEL CYCLONIC CIRCULATION) CAN FIND LITTLE REASON TO DISAGREE. THE DEEPEST MOISTURE WILL REMAIN SOUTH OF THE MOGOLLON RIM OVER NORTHERN GILA COUNTY AND YAVAPAI COUNTY. MOISTURE WILL HAVE THE TOUGHEST TIME MAKING IT INTO THE NORTHWEST CORNER OF THE CWA. WILL GO ISOLATED OVER THE NORTHWEST BUT SCATTERED IN ALL OTHER LOCATIONS. IN THE EXTENDED...SAME GENERAL PATTERN REMAINS IN PLACE. SUBTROPICAL RIDGE SLOWLY MOVES NORTHWARD WITH A MORE EASTERLY TO SOUTHEASTERLY FLOW SETTING UP ACROSS ARIZONA. STILL THINK THE MOST ACTIVE WEATHER WILL REMAIN ALONG THE MOGOLLON RIM...WHITE MOUNTAINS AND SOUTHWARD. MCCOLLUM .FGZ...NONE
In the hours before
Special weather statement, Aug 11, 11:15 AM MST, 5 hours 53 minutes before
TTAA00 KFGZ DDHHMM AZZ004>018-037>040-112130- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1115 AM MST FRI AUG 11 2000 ...STRONG THUNDERSTORMS WITH HEAVY RAIN OVER YAVAPAI COUNTY LATER THIS AFTERNOON AND EVENING... SPOTTER REPORTS OF HAIL...RAINFALL AMOUNTS...AND GUSTY WINDS REQUESTED. HIGH PRESSURE REMAINS CENTERED OVER THE FOUR CORNERS REGION WITH MOISTURE REMAINING IN PLACE ACROSS MOST OF ARIZONA. THIS WILL LEAD TO SCATTERED SHOWER AND THUNDERSTORM ACTIVITY OVER MUCH OF NORTHERN ARIZONA TODAY. THE PRIMARY AREA OF FOCUS TODAY WILL BE YAVAPAI COUNTY WHERE THE COMBINATION OF INCREASING MOISTURE AND SUNNY SKIES WILL MAKE FOR AN ACTIVE THUNDERSTORM DAY. THE FLOW ALOFT WILL PUSH THUNDERSTORMS SOUTHWARD OFF THE MOGOLLON RIM AND AS THEY MOVE INTO THE DEEPER MOISTURE ACROSS YAVAPAI COUNTY WILL STRENGTHEN. THE MAIN THREAT TODAY WILL BE FOR HEAVY RAIN AS MOISTURE VALUES WILL BE QUITE HIGH ACROSS YAVAPAI COUNTY AND STORMS WILL BE SLOW MOVING. THE HAZARDOUS WEATHER OUTLOOK GIVES PRELIMINARY INFORMATION FOR THE POSSIBILITY OF WEATHER THAT COULD BECOME SEVERE...DAMAGING WINDS IN EXCESS OF 57 MPH...HAIL 3/4 INCH IN DIAMETER OR LARGER...AND HEAVY RAINFALL THAT COULD CAUSE FLOODING OR RUNNING WASHES. WHEN HAZARDOUS WEATHER BEGINS...IMPORTANT LIFE SAVING INFORMATION WILL BE PROVIDED IN SHORT TERM FORECASTS...SEVERE WEATHER AND FLOOD WARNINGS ...AND FOLLOW-UP STATEMENTS. MCCOLLUM
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:58 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 32 min |
| Aug 12, 12:15 PM MST | Severe Thunderstorm Warning | FGZ | Navajo | 30 min |
| Aug 12, 12:15 PM MST | Severe Thunderstorm Warning | FGZ | Coconino | 30 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000
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.