Alert archive / Arizona / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 67, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Sep 10, 2002, 8:35 PM MST for Yavapai County, Arizona. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 10, 2002, 8:35 PM MST (03:35 UTC)
- Expired
- Sep 10, 2002, 9:00 PM MST
- In force
- 25 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Counties, with a storm outline in the text
County Yavapai County, AZ
The radar
The Flagstaff radar (KFSX), 76 km from the middle of the area, began a volume at 03:38 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 3.6 hours before the alert went out and 79 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
- 213 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 936 m above ground
- 0-6 km bulk shear
- 87 kt
- 0-1 km storm-relative helicity
- 514 m²/s²
- 0-3 km storm-relative helicity
- 537 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 10.5
The text
As transmitted, in the capitals the NWS used until 2016.
564 WUUS55 KFGZ 110335 SVRFGZ AZC025-110400- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 833 PM MST TUE SEP 10 2002 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL YAVAPAI COUNTY IN WEST CENTRAL ARIZONA THIS INCLUDES THE CITY OF CAMP VERDE * UNTIL 900 PM MST * AT 833 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 9 MILES NORTHEAST OF CORDES JUNCTION...MOVING NORTH AT 35 MPH. * THE SEVERE THUNDERSTORM WILL AFFECT OR PASS CLOSE TO... INTERSTATE 17 BETWEEN MILEMARKER 271 AND 289 THROUGH 900 PM MST 9 MILES WEST OF CAMP VERDE AT 840 PM MST INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE. LAT...LON 3443 11212 3441 11187 3473 11184 3474 11217
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 Sep 10, 5:20 PM MST, 3 hours 15 minutes earlier.
Area forecast discussion, Sep 10, 5:20 PM MST, 3 hours 15 minutes before
NORTHERN ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
520 PM MST TUE SEP 10 2002
.SYNOPSIS...TROPICAL MOISTURE WILL CONTINUE TO STREAM ACROSS ARIZONA
THROUGH WEDNESDAY. EXPECT NUMEROUS SHOWERS AND THUNDERSTORMS TO
CONTINUE TODAY AND TOMORROW...BEFORE DIMINISHING IN COVERAGE LATER
IN THE WEEK. EXPECT A DRYING TREND WITH MOSTLY CLEAR SKIES BY THE
WEEKEND. TEMPERATURES WILL REMAIN BELOW NORMAL FOR THE NEXT FEW
DAYS...THEN RISE TO NORMAL BY THE WEEKEND.
.DISCUSSION...EXTRAORDINARY DAY...WILL LIKELY LAST WELL INTO THE
NIGHT. EXTREMELY WET AND UNSTABLE AIRMASS OVER THE STATE IS BEING
ACTED ON BY A WEAK UPPER LOW OVER SOUTHERN CALIFORNIA. AS THIS LOW
LIFTS NORTH INTO WEDNESDAY...MID-LEVELS WILL CONTINUE TO COOL. IN
ADDITION TO THIS...STRONG DYNAMICS ASSOCIATED WITH THE LOW AND A JET
STREAK OVER COLORADO WILL SERVE TO CONTINUE CONVECTION NOCTURNALLY.
18Z MODEL RUNS INDICATE EVEN LESS DRYING BEHIND THIS LOW WEDNESDAY
DUE TO SLOW MOVEMENT...AND WE ARE LIKELY IN FOR ANOTHER ACTIVE DAY.
WILL CONTINUE NEAR CATEGORICAL POPS THROUGH THE NIGHT AND INTO
WEDNESDAY. FLOW BECOMES WESTERLY THURSDAY BEHIND THIS LOW...AND
EVENTUALLY NORTHERLY BY THE WEEKEND AS A RIDGE BUILDS IN FROM THE
PACIFIC. WILL DRY OUT POPS THURSDAY AND FRIDAY...WITH NO POPS AND
WARM WEATHER OVER THE WEEKEND. PETERSON.
.FGZ...FFA ALL ZONES UNTIL MIDNIGHT MST.
.CODED TEMPERATURES/POPS FOR SELECTED CITIES IN NORTHERN ARIZONA
CITY TEMPERATURES LO/HI PROBABILITY OF PRECIP
TON WED THU FRI TON WED THU FRI
FLAGSTAFF 050/070 046/073 044/074 080 060 040 040 030 020
WINSLOW 058/077 056/080 054/081 070 050 040 030 020 000
PRESCOTT 057/077 054/081 053/082 080 060 040 030 020 000
PAGE 065/080 064/082 063/083 060 050 040 030 020 000
WINDOW ROCK 053/070 050/072 047/073 080 070 060 050 040 030
CANYON DE CHELLY 060/076 057/078 054/079 080 070 060 050 040 020
COTTONWOOD 065/088 062/092 061/093 080 060 040 030 020 000
GRAND CANYON 051/071 047/074 045/075 080 060 040 040 020 000
GREER 049/067 045/070 043/071 080 060 040 040 030 030
HEBER 053/075 049/078 047/079 080 060 040 040 030 020
JACOB LAKE 050/067 046/070 044/071 060 050 040 030 020 000
NAVAJO N.M. 059/068 056/070 053/071 070 050 040 030 020 020
PAYSON 057/081 054/085 053/086 070 050 040 030 020 000
SEDONA 064/085 061/089 060/090 080 060 040 030 020 000
SELIGMAN 050/080 047/084 046/085 080 060 040 040 020 000
SHOW LOW 059/076 055/079 053/080 080 060 040 040 030 030
ST. JOHNS 054/073 052/076 050/077 080 060 040 040 030 020
WUPATKI N.M. 060/079 058/082 056/083 070 050 040 030 020 000In the hours before
Local storm report, Sep 10, 3:17 PM MST, 5 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FLAGSTAFF ARIZONA
0317 PM MST TUE SEP 10 2002
TIME (MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0245 PM COSNINO AZ 2 INCH HAIL
09/10/02 COCONINO REPORTED BY TRAINED SPOTTER
0250 PM DONEY PARK AZ 2 INCH HAIL
09/10/02 COCONINO REPORTED BY DONEY PARK FIRE DEPTThe office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 5:01 PM MST | Tornado Warning | FGZ | Apache | 29 min |
| Sep 10, 5:01 PM MST | Tornado Warning | FGZ | Apache | 29 min |
| Sep 10, 5:08 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Gila | 37 min |
| Sep 10, 5:26 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Yavapai | 34 min |
| Sep 10, 5:43 PM MST | Flash Flood Warning | FGZ | Coconino, Yavapai | 2 hr |
| Sep 10, 5:44 PM MST | Flash Flood Warning | FGZ | Coconino, Yavapai | 3 hr |
| Sep 10, 5:45 PM MST | Flash Flood Warning | FGZ | Apache, Navajo | 3 hr |
| Sep 10, 5:45 PM MST | Flash Flood Warning | FGZ | Apache, Navajo | 2 hr |
| Sep 10, 5:55 PM MST | Flash Flood Warning | FGZ | Coconino | 2 hr |
| Sep 10, 5:58 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Sep 10, 7:45 PM MST | Flash Flood Warning | FGZ | Apache | 105 min |
| Sep 10, 7:45 PM MST | Flash Flood Warning | FGZ | Apache | 45 min |
| Sep 10, 8:54 PM MST | Severe Thunderstorm Warning | FGZ | Yavapai | 36 min |
| Sep 10, 9:40 PM MST | Flash Flood Warning | FGZ | Apache | 65 min |
| Sep 10, 9:49 PM MST | Flash Flood Warning | FGZ | Apache | 116 min |
| Sep 11, 1:25 AM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Sep 11, 1:25 AM MST | Flash Flood Warning | FGZ | Coconino | 2 hr |
| Sep 11, 12:25 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Sep 11, 12:25 PM MST | Flash Flood Warning | FGZ | Coconino | 110 min |
| Sep 11, 12:28 PM MST | Severe Thunderstorm Warning | FGZ | Coconino, Navajo | 32 min |
| Sep 11, 2:00 PM MST | Severe Thunderstorm Warning | FGZ | Navajo | 45 min |
| Sep 11, 3:05 PM MST | Flash Flood Warning | FGZ | Coconino | 3 hr |
| Sep 11, 3:05 PM MST | Flash Flood Warning | FGZ | Coconino | 2 hr |
Nearby
Severe Thunderstorm Warnings in Arizona, 2002Every severe thunderstorm warning in 2002
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.